Marcelo Cunha - Academia.edu (original) (raw)
Papers by Marcelo Cunha
Journal of Reconstructive Microsurgery - J RECONSTR MICROSURG, 2009
Viability and functional results of a segment replantation depend on the prevention of deleteriou... more Viability and functional results of a segment replantation depend on the prevention of deleterious effects of ischemia. Prolonged ischemia leads to alterations in the microcirculation: thrombosis, edema, production of oxygen free radicals, and platelet aggregation. The effect of IIb-IIIa glycoprotein inhibitors was tested in a partial limb amputation model submitted to warm ischemia. The male Wistar rats were divided into four groups: G1 with 0 hours of ischemia and saline ( N = 20), G2 with 6 hours of ischemia and saline ( N = 24), G3 with 6 hours of ischemia and abciximab ( N = 23), and G4 with 6 hours of ischemia and tirofiban ( N = 29). The limbs were observed for 7 days and classified as viable or nonviable. Viability and mortality rates were obtained and analyzed by Q-square and Fisher exact tests ( P < 0.05). The viability rates were 100% (G1), 30% (G2), 77.78% (G3), and 80.95% (G4). G2 was statistically different from G1, G3, and G4. G1, G3, and G4 were not statistically different. Transoperative and postoperative mortalities were not statistically different. The administration of abciximab and tirofiban improved limb salvage after ischemia and reperfusion and did not modify mortality rates significantly.
Plastic and Reconstructive Surgery, 2004
Free flaps based on perforator vessels, and in particular the deep inferior epigastric perforator... more Free flaps based on perforator vessels, and in particular the deep inferior epigastric perforator (DIEP) flap, are currently being applied in abdominal reconstruction. However, one of the main disadvantages is the operative complexity. Through anatomical study and clinical experience with the DIEP flap in breast reconstruction, the intramuscular path of the perforator vessels was comparatively studied, to establish the main anatomical parameters that favor procedure planning. Thirty DIEP flaps from 15 fresh cadavers were used. The number, location, and intramuscular course of the perforator vessels were determined. In addition, an initial clinical study was performed in 31 patients using 35 DIEP flaps in breast reconstruction. The number, location, and the intramuscular course of the perforators were assessed. In the cadaver study, 191 perforator vessels were detected (6.4 vessels per flap). Thirty-four percent were located in the lateral row, and the rectilinear course was observed in 79.2 percent of these vessels. In the medial row, only 18.2 percent of the perforator vessels presented this configuration (p = 0.001). Thirty-one patients underwent DIEP flap breast reconstruction, with 26 immediate and four bilateral reconstructions. In 22 of 35 flaps (62.9 percent), two perforators were used. In 25 flaps (71.4 percent), the lateral row perforators with a rectilinear course were observed. Mean operative time was 7 hours and 37 minutes. Two total flap losses and two partial necroses were observed. The majority of the lateral row perforators presented a rectilinear intramuscular course, which was shorter than that of the medial row perforators. This anatomical characteristic favors dissection with reduced operative time and vascular lesion morbidity, resulting in an important anatomical parameter for DIEP flap harvesting.
Revista do Hospital das Clínicas, 2002
Tissue expanders have been of great value in plastic surgery. Tissue expansion was developed for ... more Tissue expanders have been of great value in plastic surgery. Tissue expansion was developed for a specific indication; however, within a very short time, the concept of tissue expansion found wide applicability. From 1990 to 1999, 315 expanders in 164 patients were utilized. A retrospective analysis of complications and prognostic factors for complications were done. The indications for tissue expansion were burns (50%), trauma (32%), and sequelae of previous surgery (8.8%). The expanders were inserted most frequently in the scalp, trunk and neck. There were 22.2% of complications and the most common were expander exposure (50%), infection (24%) and bad function of the expander (12.8%). The present study revealed an increased rate of minor complications in the group of 0 to 10 years of age and an increased rate of major complications for face and neck expansions compared to trunk expansion. There were no increased complication rates for the other age and anatomic site groups, previous expansion, concomitant expansion and type of expander used. The outcomes from tissue expansion procedures done in our hospital are similar to those reported in the literature. Tissue expansion is a good and safe technique.
Aesthetic Plastic Surgery, 2003
The principle of free flaps based on perforator vessels and the development of deep inferior epig... more The principle of free flaps based on perforator vessels and the development of deep inferior epigastric perforator flap (DIEP) is currently used in reconstructive microsurgery. Clinical experience and research have shown that perforator flaps provide numerous advantages over the conventional myocutaneous flaps and combine muscle preservation and sequel minimization at the donor site. Clinical use of autogenous tissue or perforator flaps in aesthetic breast surgery or augmentation mammaplasty is not a common practice. The authors indicate the use of the DIEP flap to correct severe hypomastia after bilateral breast augmentation with silicon implants, followed by infection and implant extrusion. Using the DIEP flap is a new option for patients who have had complications from breast augmentation with implants or severe hypomastia and have excess tissue in the lower abdomen. Additional studies and clinical research are necessary to evaluate the real benefits as compared to silicone implants, such as operative time, the recovery period and financial implications.
Revista do Hospital das Clínicas, 2002
Tissue expanders have been of great value in plastic surgery. Tissue expansion was developed for ... more Tissue expanders have been of great value in plastic surgery. Tissue expansion was developed for a specific indication; however, within a very short time, the concept of tissue expansion found wide applicability. From 1990 to 1999, 315 expanders in 164 patients were utilized. A retrospective analysis of complications and prognostic factors for complications were done. The indications for tissue expansion were burns (50%), trauma (32%), and sequelae of previous surgery (8.8%). The expanders were inserted most frequently in the scalp, trunk and neck. There were 22.2% of complications and the most common were expander exposure (50%), infection (24%) and bad function of the expander (12.8%). The present study revealed an increased rate of minor complications in the group of 0 to 10 years of age and an increased rate of major complications for face and neck expansions compared to trunk expansion. There were no increased complication rates for the other age and anatomic site groups, previous expansion, concomitant expansion and type of expander used. The outcomes from tissue expansion procedures done in our hospital are similar to those reported in the literature. Tissue expansion is a good and safe technique.
Aesthetic Plastic Surgery, 2003
The principle of free flaps based on perforator vessels and the development of deep inferior epig... more The principle of free flaps based on perforator vessels and the development of deep inferior epigastric perforator flap (DIEP) is currently used in reconstructive microsurgery. Clinical experience and research have shown that perforator flaps provide numerous advantages over the conventional myocutaneous flaps and combine muscle preservation and sequel minimization at the donor site. Clinical use of autogenous tissue or perforator flaps in aesthetic breast surgery or augmentation mammaplasty is not a common practice. The authors indicate the use of the DIEP flap to correct severe hypomastia after bilateral breast augmentation with silicon implants, followed by infection and implant extrusion. Using the DIEP flap is a new option for patients who have had complications from breast augmentation with implants or severe hypomastia and have excess tissue in the lower abdomen. Additional studies and clinical research are necessary to evaluate the real benefits as compared to silicone implants, such as operative time, the recovery period and financial implications.
Physical Review Letters, 2013
Contextuality and nonlocality are two fundamental properties of nature. Hardy's proof is consider... more Contextuality and nonlocality are two fundamental properties of nature. Hardy's proof is considered the simplest proof of nonlocality and can also be seen as a particular violation of the simplest Bell inequality. A fundamental question is: Which is the simplest proof of contextuality? We show that there is a Hardy-like proof of contextuality that can also be seen as a particular violation of the simplest noncontextuality inequality. Interestingly, this new proof connects this inequality with the proof of the Kochen-Specker theorem, providing the missing link between these two fundamental results, and can be extended to an arbitrary odd number n of settings, an extension that can be seen as a particular violation of the n-cycle inequality.
Physical Review Letters, 2011
Physical Review Letters, 2011
Physical Review Letters, 2009
We analyze the possible results of the most general measurement on two copies of a quantum state.... more We analyze the possible results of the most general measurement on two copies of a quantum state. We show that µ can label a set of outcomes of such measurement if and only if there is a family of completely co-positive (ccP) maps Cµ such that the probability of occurrence P rob(µ) is the fidelity of the map Cµ, i.e. P rob(µ) = T r(ρ Cµ(ρ)) which must add up to the fully depolarizing map. This implies that a POVM on two copies induces a measure on the set of ccP maps (i.e., a ccPMVM). We present examples of ccPMVM's and discuss their tomographic applications showing that two copies of a state provide an exponential improvement in the efficiency of quantum state tomography. This enables the existence of an efficient universal detector. PACS numbers: 03.67.-a, 03.65.Ta, 03.65.Wj
Physical Review A, 2014
We show that the exclusivity (E) principle singles out the set of quantum correlations associated... more We show that the exclusivity (E) principle singles out the set of quantum correlations associated to any exclusivity graph assuming the set of quantum correlations for the complementary graph. Moreover, we prove that, for self-complementary graphs, the E principle, by itself (i.e., without further assumptions), excludes any set of correlations strictly larger than the quantum set. Finally, we prove that, for vertex-transitive graphs, the E principle singles out the maximum value for the quantum correlations assuming only the quantum maximum for the complementary graph. This opens the door for testing the impossibility of higher-than-quantum correlations in experiments. PACS numbers: 03.65.-w,03.65.Ta, 3.65.Ud
Physical Review A, 2014
We show that correlations between the detector positions at the two-photon Young interference pla... more We show that correlations between the detector positions at the two-photon Young interference plane exhibit contextual behavior. Contextuality is demonstrated by showing the violation of the n-cycle noncontextuality inequalities [M. Araújo et al., Phys. Rev. A 88, 022118 (2013)] for any even number n of observables ranging from 4 to 14. These violations exclude noncontextual hidden-variable theories as an explanation of the conditional two-photon Young pattern. Unlike recent contextuality experiments, ours is free of the compatibility loophole.
Physical Review A, 2012
We show that hybrid local measurements combining homodyne measurements and photodetection provide... more We show that hybrid local measurements combining homodyne measurements and photodetection provide violations of a Bell inequality with arbitrarily low photodetection efficiency. This is shown in two different scenarios: when one part receives an atom entangled to the field mode to be measured by the other part and when both parts make similar photonic measurements. Our findings definitely put the hybrid measurement scenario as a strong candidate for the implementation of a loophole-free Bell test. PACS numbers: 03.65.Ud,03.67.Mn
Physical Review A, 2006
We study the relation between energy and entanglement in an entanglement transfer problem. We fir... more We study the relation between energy and entanglement in an entanglement transfer problem. We first analyze the general setup of two entangled qubits ("a" and "b") exchanging this entanglement with two other independent qubits ("A" and "B"). Qubit "a" ("b") interacts with qubit "A" ("B") via a spin exchange-like unitary evolution. A physical realization of this scenario could be the problem of two-level atoms transferring entanglement to resonant cavities via independent Jaynes-Cummings interactions. We study the dynamics of entanglement and energy for the second pair of qubits (tracing out the originally entangled ones) and show that these quantities are closely related. For example, the allowed quantum states occupy a restricted area in a phase diagram entanglement vs. energy. Moreover the curve which bounds this area is exactly the one followed if both interactions are equal and the entire four qubit system is isolated. We also consider the case when the target pair of qubits is subjected to losses and can spontaneously decay.
Physical Review A, 2010
We propose local strategies to protect global quantum information. The protocols, which are quant... more We propose local strategies to protect global quantum information. The protocols, which are quantum error correcting codes for dissipative systems, are based on environment measurements, direct feedback control and simple encoding of the logical qubits into physical qutrits whose decaying transitions are indistinguishable and equally probable. The simple addition of one extra level in the description of the subsystems allows for local actions to fully and deterministically protect global resources, such as entanglement. We present codes for both quantum jump and quantum state diffusion measurement strategies and test them against several sources of inefficiency. The use of qutrits in information protocols suggests further characterization of qutrit-qutrit disentanglement dynamics, which we also give together with simple local environment measurement schemes able to prevent distillability sudden death and even enhance entanglement in situations in which our feedback error correction is not possible.
Physical Review A, 2012
Page 1. PHYSICAL REVIEW A 85, 012104 (2012) Continuous-variable nonlocality test performed over a... more Page 1. PHYSICAL REVIEW A 85, 012104 (2012) Continuous-variable nonlocality test performed over a multiphoton quantum state Chiara Vitelli,1 Marcelo Terra Cunha,2 Nicol`o Spagnolo,1,3 Francesco De Martini,4 and Fabio ...
Physical Review A, 2013
It has been recently conjectured that the state-independency of quantum contextuality may be lost... more It has been recently conjectured that the state-independency of quantum contextuality may be lost when the indistinguishability of identical particles is taken into account. Here, we show that quantum state-independent contextuality exists for any system of more than one identical bosonic qudits, and for most systems of fermionic qudits. The only exception is the case of d fermionic qudits, since there the dimension of the antisymmetric subspace is 1, which is insufficient for contextuality. For all the other cases, either the symmetry precludes the existence of physical states, or we provide an explicit method to produce quantum state-independent contextual correlations.
Journal of Reconstructive Microsurgery - J RECONSTR MICROSURG, 2009
Viability and functional results of a segment replantation depend on the prevention of deleteriou... more Viability and functional results of a segment replantation depend on the prevention of deleterious effects of ischemia. Prolonged ischemia leads to alterations in the microcirculation: thrombosis, edema, production of oxygen free radicals, and platelet aggregation. The effect of IIb-IIIa glycoprotein inhibitors was tested in a partial limb amputation model submitted to warm ischemia. The male Wistar rats were divided into four groups: G1 with 0 hours of ischemia and saline ( N = 20), G2 with 6 hours of ischemia and saline ( N = 24), G3 with 6 hours of ischemia and abciximab ( N = 23), and G4 with 6 hours of ischemia and tirofiban ( N = 29). The limbs were observed for 7 days and classified as viable or nonviable. Viability and mortality rates were obtained and analyzed by Q-square and Fisher exact tests ( P < 0.05). The viability rates were 100% (G1), 30% (G2), 77.78% (G3), and 80.95% (G4). G2 was statistically different from G1, G3, and G4. G1, G3, and G4 were not statistically different. Transoperative and postoperative mortalities were not statistically different. The administration of abciximab and tirofiban improved limb salvage after ischemia and reperfusion and did not modify mortality rates significantly.
Plastic and Reconstructive Surgery, 2004
Free flaps based on perforator vessels, and in particular the deep inferior epigastric perforator... more Free flaps based on perforator vessels, and in particular the deep inferior epigastric perforator (DIEP) flap, are currently being applied in abdominal reconstruction. However, one of the main disadvantages is the operative complexity. Through anatomical study and clinical experience with the DIEP flap in breast reconstruction, the intramuscular path of the perforator vessels was comparatively studied, to establish the main anatomical parameters that favor procedure planning. Thirty DIEP flaps from 15 fresh cadavers were used. The number, location, and intramuscular course of the perforator vessels were determined. In addition, an initial clinical study was performed in 31 patients using 35 DIEP flaps in breast reconstruction. The number, location, and the intramuscular course of the perforators were assessed. In the cadaver study, 191 perforator vessels were detected (6.4 vessels per flap). Thirty-four percent were located in the lateral row, and the rectilinear course was observed in 79.2 percent of these vessels. In the medial row, only 18.2 percent of the perforator vessels presented this configuration (p = 0.001). Thirty-one patients underwent DIEP flap breast reconstruction, with 26 immediate and four bilateral reconstructions. In 22 of 35 flaps (62.9 percent), two perforators were used. In 25 flaps (71.4 percent), the lateral row perforators with a rectilinear course were observed. Mean operative time was 7 hours and 37 minutes. Two total flap losses and two partial necroses were observed. The majority of the lateral row perforators presented a rectilinear intramuscular course, which was shorter than that of the medial row perforators. This anatomical characteristic favors dissection with reduced operative time and vascular lesion morbidity, resulting in an important anatomical parameter for DIEP flap harvesting.
Revista do Hospital das Clínicas, 2002
Tissue expanders have been of great value in plastic surgery. Tissue expansion was developed for ... more Tissue expanders have been of great value in plastic surgery. Tissue expansion was developed for a specific indication; however, within a very short time, the concept of tissue expansion found wide applicability. From 1990 to 1999, 315 expanders in 164 patients were utilized. A retrospective analysis of complications and prognostic factors for complications were done. The indications for tissue expansion were burns (50%), trauma (32%), and sequelae of previous surgery (8.8%). The expanders were inserted most frequently in the scalp, trunk and neck. There were 22.2% of complications and the most common were expander exposure (50%), infection (24%) and bad function of the expander (12.8%). The present study revealed an increased rate of minor complications in the group of 0 to 10 years of age and an increased rate of major complications for face and neck expansions compared to trunk expansion. There were no increased complication rates for the other age and anatomic site groups, previous expansion, concomitant expansion and type of expander used. The outcomes from tissue expansion procedures done in our hospital are similar to those reported in the literature. Tissue expansion is a good and safe technique.
Aesthetic Plastic Surgery, 2003
The principle of free flaps based on perforator vessels and the development of deep inferior epig... more The principle of free flaps based on perforator vessels and the development of deep inferior epigastric perforator flap (DIEP) is currently used in reconstructive microsurgery. Clinical experience and research have shown that perforator flaps provide numerous advantages over the conventional myocutaneous flaps and combine muscle preservation and sequel minimization at the donor site. Clinical use of autogenous tissue or perforator flaps in aesthetic breast surgery or augmentation mammaplasty is not a common practice. The authors indicate the use of the DIEP flap to correct severe hypomastia after bilateral breast augmentation with silicon implants, followed by infection and implant extrusion. Using the DIEP flap is a new option for patients who have had complications from breast augmentation with implants or severe hypomastia and have excess tissue in the lower abdomen. Additional studies and clinical research are necessary to evaluate the real benefits as compared to silicone implants, such as operative time, the recovery period and financial implications.
Revista do Hospital das Clínicas, 2002
Tissue expanders have been of great value in plastic surgery. Tissue expansion was developed for ... more Tissue expanders have been of great value in plastic surgery. Tissue expansion was developed for a specific indication; however, within a very short time, the concept of tissue expansion found wide applicability. From 1990 to 1999, 315 expanders in 164 patients were utilized. A retrospective analysis of complications and prognostic factors for complications were done. The indications for tissue expansion were burns (50%), trauma (32%), and sequelae of previous surgery (8.8%). The expanders were inserted most frequently in the scalp, trunk and neck. There were 22.2% of complications and the most common were expander exposure (50%), infection (24%) and bad function of the expander (12.8%). The present study revealed an increased rate of minor complications in the group of 0 to 10 years of age and an increased rate of major complications for face and neck expansions compared to trunk expansion. There were no increased complication rates for the other age and anatomic site groups, previous expansion, concomitant expansion and type of expander used. The outcomes from tissue expansion procedures done in our hospital are similar to those reported in the literature. Tissue expansion is a good and safe technique.
Aesthetic Plastic Surgery, 2003
The principle of free flaps based on perforator vessels and the development of deep inferior epig... more The principle of free flaps based on perforator vessels and the development of deep inferior epigastric perforator flap (DIEP) is currently used in reconstructive microsurgery. Clinical experience and research have shown that perforator flaps provide numerous advantages over the conventional myocutaneous flaps and combine muscle preservation and sequel minimization at the donor site. Clinical use of autogenous tissue or perforator flaps in aesthetic breast surgery or augmentation mammaplasty is not a common practice. The authors indicate the use of the DIEP flap to correct severe hypomastia after bilateral breast augmentation with silicon implants, followed by infection and implant extrusion. Using the DIEP flap is a new option for patients who have had complications from breast augmentation with implants or severe hypomastia and have excess tissue in the lower abdomen. Additional studies and clinical research are necessary to evaluate the real benefits as compared to silicone implants, such as operative time, the recovery period and financial implications.
Physical Review Letters, 2013
Contextuality and nonlocality are two fundamental properties of nature. Hardy's proof is consider... more Contextuality and nonlocality are two fundamental properties of nature. Hardy's proof is considered the simplest proof of nonlocality and can also be seen as a particular violation of the simplest Bell inequality. A fundamental question is: Which is the simplest proof of contextuality? We show that there is a Hardy-like proof of contextuality that can also be seen as a particular violation of the simplest noncontextuality inequality. Interestingly, this new proof connects this inequality with the proof of the Kochen-Specker theorem, providing the missing link between these two fundamental results, and can be extended to an arbitrary odd number n of settings, an extension that can be seen as a particular violation of the n-cycle inequality.
Physical Review Letters, 2011
Physical Review Letters, 2011
Physical Review Letters, 2009
We analyze the possible results of the most general measurement on two copies of a quantum state.... more We analyze the possible results of the most general measurement on two copies of a quantum state. We show that µ can label a set of outcomes of such measurement if and only if there is a family of completely co-positive (ccP) maps Cµ such that the probability of occurrence P rob(µ) is the fidelity of the map Cµ, i.e. P rob(µ) = T r(ρ Cµ(ρ)) which must add up to the fully depolarizing map. This implies that a POVM on two copies induces a measure on the set of ccP maps (i.e., a ccPMVM). We present examples of ccPMVM's and discuss their tomographic applications showing that two copies of a state provide an exponential improvement in the efficiency of quantum state tomography. This enables the existence of an efficient universal detector. PACS numbers: 03.67.-a, 03.65.Ta, 03.65.Wj
Physical Review A, 2014
We show that the exclusivity (E) principle singles out the set of quantum correlations associated... more We show that the exclusivity (E) principle singles out the set of quantum correlations associated to any exclusivity graph assuming the set of quantum correlations for the complementary graph. Moreover, we prove that, for self-complementary graphs, the E principle, by itself (i.e., without further assumptions), excludes any set of correlations strictly larger than the quantum set. Finally, we prove that, for vertex-transitive graphs, the E principle singles out the maximum value for the quantum correlations assuming only the quantum maximum for the complementary graph. This opens the door for testing the impossibility of higher-than-quantum correlations in experiments. PACS numbers: 03.65.-w,03.65.Ta, 3.65.Ud
Physical Review A, 2014
We show that correlations between the detector positions at the two-photon Young interference pla... more We show that correlations between the detector positions at the two-photon Young interference plane exhibit contextual behavior. Contextuality is demonstrated by showing the violation of the n-cycle noncontextuality inequalities [M. Araújo et al., Phys. Rev. A 88, 022118 (2013)] for any even number n of observables ranging from 4 to 14. These violations exclude noncontextual hidden-variable theories as an explanation of the conditional two-photon Young pattern. Unlike recent contextuality experiments, ours is free of the compatibility loophole.
Physical Review A, 2012
We show that hybrid local measurements combining homodyne measurements and photodetection provide... more We show that hybrid local measurements combining homodyne measurements and photodetection provide violations of a Bell inequality with arbitrarily low photodetection efficiency. This is shown in two different scenarios: when one part receives an atom entangled to the field mode to be measured by the other part and when both parts make similar photonic measurements. Our findings definitely put the hybrid measurement scenario as a strong candidate for the implementation of a loophole-free Bell test. PACS numbers: 03.65.Ud,03.67.Mn
Physical Review A, 2006
We study the relation between energy and entanglement in an entanglement transfer problem. We fir... more We study the relation between energy and entanglement in an entanglement transfer problem. We first analyze the general setup of two entangled qubits ("a" and "b") exchanging this entanglement with two other independent qubits ("A" and "B"). Qubit "a" ("b") interacts with qubit "A" ("B") via a spin exchange-like unitary evolution. A physical realization of this scenario could be the problem of two-level atoms transferring entanglement to resonant cavities via independent Jaynes-Cummings interactions. We study the dynamics of entanglement and energy for the second pair of qubits (tracing out the originally entangled ones) and show that these quantities are closely related. For example, the allowed quantum states occupy a restricted area in a phase diagram entanglement vs. energy. Moreover the curve which bounds this area is exactly the one followed if both interactions are equal and the entire four qubit system is isolated. We also consider the case when the target pair of qubits is subjected to losses and can spontaneously decay.
Physical Review A, 2010
We propose local strategies to protect global quantum information. The protocols, which are quant... more We propose local strategies to protect global quantum information. The protocols, which are quantum error correcting codes for dissipative systems, are based on environment measurements, direct feedback control and simple encoding of the logical qubits into physical qutrits whose decaying transitions are indistinguishable and equally probable. The simple addition of one extra level in the description of the subsystems allows for local actions to fully and deterministically protect global resources, such as entanglement. We present codes for both quantum jump and quantum state diffusion measurement strategies and test them against several sources of inefficiency. The use of qutrits in information protocols suggests further characterization of qutrit-qutrit disentanglement dynamics, which we also give together with simple local environment measurement schemes able to prevent distillability sudden death and even enhance entanglement in situations in which our feedback error correction is not possible.
Physical Review A, 2012
Page 1. PHYSICAL REVIEW A 85, 012104 (2012) Continuous-variable nonlocality test performed over a... more Page 1. PHYSICAL REVIEW A 85, 012104 (2012) Continuous-variable nonlocality test performed over a multiphoton quantum state Chiara Vitelli,1 Marcelo Terra Cunha,2 Nicol`o Spagnolo,1,3 Francesco De Martini,4 and Fabio ...
Physical Review A, 2013
It has been recently conjectured that the state-independency of quantum contextuality may be lost... more It has been recently conjectured that the state-independency of quantum contextuality may be lost when the indistinguishability of identical particles is taken into account. Here, we show that quantum state-independent contextuality exists for any system of more than one identical bosonic qudits, and for most systems of fermionic qudits. The only exception is the case of d fermionic qudits, since there the dimension of the antisymmetric subspace is 1, which is insufficient for contextuality. For all the other cases, either the symmetry precludes the existence of physical states, or we provide an explicit method to produce quantum state-independent contextual correlations.