Robabeh Rahimi - Academia.edu (original) (raw)

Papers by Robabeh Rahimi

Research paper thumbnail of Novel Applications of ESR/EPR: Quantum Computing/Quantum Information Processing

Progress in Theoretical Chemistry and Physics, 2012

Research paper thumbnail of 25pRF-13 Controlled teleportation of an arbitrary unknown two-qubit entangled state

日本物理学会講演概要集, Feb 29, 2008

Research paper thumbnail of Entanglement of arbitrary spin modes in an expanding universe

Pair particle creation is a well-known effect on the domain of field theory in curved space-time.... more Pair particle creation is a well-known effect on the domain of field theory in curved space-time. It is shown that the entanglement generations for spin-0 and spin-1/2 modes are different in Friedmann-Robertson-Walker (FRW) space-time. We consider the spin-1 particles in FRW space-time using Duffin-Kemmer-Petiao (DKP) equation and obtain a measure of the generated entanglement. Also, we consider the spin-3/2 particles. We argue that the absolute value of the spin does not play any role in entanglement generation and the differences are due to the bosonic or fermionic properties.

Research paper thumbnail of Semiclassical genetic algorithm with quantum crossover and mutation operations

In order for finding a good individual for a given fitness function in the context of evolutionar... more In order for finding a good individual for a given fitness function in the context of evolutionary computing, we introduce a novel semiclassical quantum genetic algorithm. It has both of quantum crossover and quantum mutation procedures unlike conventional quantum genetic algorithms. A complexity analysis shows a certain improvement over its classical counterpart.

Research paper thumbnail of A quantum genetic algorithm with quantum crossover and mutation operations

In the context of evolutionary quantum computing in the literal meaning, a quantum crossover oper... more In the context of evolutionary quantum computing in the literal meaning, a quantum crossover operation has not been introduced so far. Here, we introduce a novel quantum genetic algorithm which has a quantum crossover procedure performing crossovers among all chromosomes in parallel for each generation. A complexity analysis shows that a quadratic speedup is achieved over its classical counterpart in the dominant factor of the run time to handle each generation.

Research paper thumbnail of Molecular Realizations of Quantum Computing 2007

Liquid-state NMR quantum computer: working principle and some examples / Y. Kondo -- Flux qubits,... more Liquid-state NMR quantum computer: working principle and some examples / Y. Kondo -- Flux qubits, tunable coupling and beyond / A. O. Niskanen -- Josephson phase qubits, and quantum communication via a resonant cavity / M. A. Sillanpää -- Quantum computing using pulse-based electron-nuclear double resonance (ENDOR): molecular spin-qubits / K. Sato ... [et al.] -- Fullerene C[symbol]: a possible molecular quantum computer / T. Wakabayashi -- Molecular magnets for quantum computation / T. Kuroda -- Errors in a plausible scheme of quantum gates in Kane's model / Y. Ota -- Yet another formulation for quantum simultaneous noncooperative bimatrix games / A. SaiToh, R. Rahimi, M. Nakahara -- Continuous-variable teleportation of single-photon states and an accidental cloning of a photonic qubit in two-channel teleportation / T. Ide.

Research paper thumbnail of Molecular realizations of quantum computing 2007. Papers based on the presentations at the symposium, Osaka, Japan, 31 October – 2 November 2007

ABSTRACT Liquid-state NMR quantum computer: working principle and some examples / Y. Kondo -- Flu... more ABSTRACT Liquid-state NMR quantum computer: working principle and some examples / Y. Kondo -- Flux qubits, tunable coupling and beyond / A. O. Niskanen -- Josephson phase qubits, and quantum communication via a resonant cavity / M. A. Sillanpää -- Quantum computing using pulse-based electron-nuclear double resonance (ENDOR): molecular spin-qubits / K. Sato ... [et al.] -- Fullerene C[symbol]: a possible molecular quantum computer / T. Wakabayashi -- Molecular magnets for quantum computation / T. Kuroda -- Errors in a plausible scheme of quantum gates in Kane's model / Y. Ota -- Yet another formulation for quantum simultaneous noncooperative bimatrix games / A. SaiToh, R. Rahimi, M. Nakahara -- Continuous-variable teleportation of single-photon states and an accidental cloning of a photonic qubit in two-channel teleportation / T. Ide.

Research paper thumbnail of Decoherence Suppression in Quantum Systems 2008

Decoherence Suppression in Quantum Systems 2008, Nov 1, 2009

... 2008 7: 45-8: 45 Breakfast 9: 00-10: 30 A. SaiToh, Quantum Wipe EffectI 10: 30-10: 45 CoffeeB... more ... 2008 7: 45-8: 45 Breakfast 9: 00-10: 30 A. SaiToh, Quantum Wipe EffectI 10: 30-10: 45 CoffeeBreak 10: 45-12 ... Daisuke Aratsu Chiara Bagnasco Masamitsu Bando Vahideh Ebrahimi Bakhtavar Frank Gaitan Kenichi Kasamatsu Gen Kimura Yasushi Kondo Osama Moussa Ayumi ...

Research paper thumbnail of Numerical Computation of Time-Dependent Multipartite Nonclassical Correlation

Research paper thumbnail of Erratum to: Hyperfine spin qubits in irradiated malonic acid: heat-bath algorithmic cooling

Quantum Information Processing, 2015

Research paper thumbnail of NMR quantum information processing without pseudo-pure state

An experimental approach is proposed for superdense coding to test the existence of entanglement ... more An experimental approach is proposed for superdense coding to test the existence of entanglement in NMR. This approach does not require any preparation of pseudo-pure state. The result suggests either that the quantitative threshold must be introduced to the experiment to assure the existence of entanglement or that the mathematical criterion for mixed state entanglement is unphysical.

Research paper thumbnail of Mathematical aspects of quantum computing 2007. Papers based on the presentations at the summer school, Osaka, Japan, August 27–29, 2007

Research paper thumbnail of Mathematical Aspects of Quantum Computing 2007

... Manabu Ikeda, Yasushi Inoue, Kaiki Taro Kikuta, Toshiyuki Kobata, Kumi Kondo, Yasushi Markham... more ... Manabu Ikeda, Yasushi Inoue, Kaiki Taro Kikuta, Toshiyuki Kobata, Kumi Kondo, Yasushi Markham, Damian James Harold Minami, Kaori Nagaoka, Shoyu Nakagawa, Nobuo Nakahara, Mikio Ootsuka, Takayoshi Ota, Yukihiro Ozdemir, Sahin Kaya Rahimi Darabad, Robabeh ...

Research paper thumbnail of Mathematical framework for detection and quantification of nonclassical correlation

Quantum information & computation

Existing measures of bipartite nonclassical correlation that is typically characterized by nonvan... more Existing measures of bipartite nonclassical correlation that is typically characterized by nonvanishing nonlocalizable information under the zero-way CLOCC protocol are expensive in computational cost. We define and evaluate economical measures on the basis of a new class of maps, eigenvalue-preserving-but-not-completely-eigenvaluepreserving (EnCE) maps. The class is in analogy to the class of positive-but-notcompletely-positive (PnCP) maps that have been commonly used in the entanglement theories. Linear and nonlinear EnCE maps are investigated. We also prove subadditivity of the measures derived from the maps.

Research paper thumbnail of Quantum Coherence Conservation by Growth in Environmental Dissipation Rate

Quantum coherence conservation is shown to be achieved by a very high rate of dissipation of an e... more Quantum coherence conservation is shown to be achieved by a very high rate of dissipation of an environmental system coupled with a principal system. This effect is not in the list of previously-known strategies of noise suppression, such as Zeno effect, dynamical decoupling, quantum error correction code, and decoherence free subspace. An analytical solution is found for a simplified model of a single qubit coupled with an environmental single qubit dissipating rapidly. We also show examples of coherence conservation in a spin-boson linear coupling model with a numerical evaluation.

Research paper thumbnail of Entanglement of arbitrary spin modes in expanding universe

Quantum Information Processing, 2015

Pair particle creation is a well-known effect on the domain of field theory in curved space-time.... more Pair particle creation is a well-known effect on the domain of field theory in curved space-time. It is shown that the entanglement generations for spin-0 and spin-1/2 modes are different in Friedmann-Robertson-Walker (FRW) space-time. We consider the spin-1 particles in FRW space-time using Duffin-Kemmer-Petiao (DKP) equation and obtain a measure of the generated entanglement. Also, we consider the spin-3/2 particles. We argue that the absolute value of the spin does not play any role in entanglement generation and the differences are due to the bosonic or fermionic properties.

Research paper thumbnail of Decoherence suppression in quantum systems 2008. Papers based on the presentations at the symposium, Kobe, Japan, September 7–10, 2008

Research paper thumbnail of Condensed Matter Theories Volume 24

Research paper thumbnail of Limitation for linear maps in a class for detection and quantification of bipartite nonclassical correlation

Quantum information & computation

Eigenvalue-preserving-but-not-completely-eigenvalue-preserving (EnCE) maps were previously introd... more Eigenvalue-preserving-but-not-completely-eigenvalue-preserving (EnCE) maps were previously introduced for the purpose of detection and quantification of nonclassical correlation, employing the paradigm where nonvanishing quantum discord implies the existence of nonclassical correlation. It is known that only the matrix transposition is nontrivial among Hermiticity-preserving (HP) linear EnCE maps when we use the changes in the eigenvalues of a density matrix due to a partial map for the purpose. In this paper, we prove that this is true even among not-necessarily HP (nnHP) linear EnCE maps. The proof utilizes a conventional theorem on linear preservers. This result imposes a strong limitation on the linear maps and promotes the importance of nonlinear maps.

Research paper thumbnail of Heat Bath Algorithmic Cooling with Spins: Review and Prospects

Application of multiple rounds of Quantum Error Correction (QEC) is an essential milestone toward... more Application of multiple rounds of Quantum Error Correction (QEC) is an essential milestone towards the construction of scalable quantum information processing devices. However, experimental realizations of it are still in their infancy. The requirements for multiple round QEC are high control fidelity and the ability to extract entropy from ancilla qubits. Nuclear Magnetic Resonance (NMR) based quantum devices have demonstrated high control fidelity with up to 12 qubits. On the other hand, the major challenge in the NMR QEC experiment is to efficiently supply ancilla qubits in highly pure states at the beginning of each round of QEC. Purification of qubits in NMR, or in other ensemble based quantum systems can be accomplished through Heat Bath Algorithmic Cooling (HBAC). It is an efficient method for extracting entropy from qubits that interact with a heat bath, allowing cooling below the bath temperature. For practical HBAC, coupled electron-nuclear spin systems are more promising ...

Research paper thumbnail of Novel Applications of ESR/EPR: Quantum Computing/Quantum Information Processing

Progress in Theoretical Chemistry and Physics, 2012

Research paper thumbnail of 25pRF-13 Controlled teleportation of an arbitrary unknown two-qubit entangled state

日本物理学会講演概要集, Feb 29, 2008

Research paper thumbnail of Entanglement of arbitrary spin modes in an expanding universe

Pair particle creation is a well-known effect on the domain of field theory in curved space-time.... more Pair particle creation is a well-known effect on the domain of field theory in curved space-time. It is shown that the entanglement generations for spin-0 and spin-1/2 modes are different in Friedmann-Robertson-Walker (FRW) space-time. We consider the spin-1 particles in FRW space-time using Duffin-Kemmer-Petiao (DKP) equation and obtain a measure of the generated entanglement. Also, we consider the spin-3/2 particles. We argue that the absolute value of the spin does not play any role in entanglement generation and the differences are due to the bosonic or fermionic properties.

Research paper thumbnail of Semiclassical genetic algorithm with quantum crossover and mutation operations

In order for finding a good individual for a given fitness function in the context of evolutionar... more In order for finding a good individual for a given fitness function in the context of evolutionary computing, we introduce a novel semiclassical quantum genetic algorithm. It has both of quantum crossover and quantum mutation procedures unlike conventional quantum genetic algorithms. A complexity analysis shows a certain improvement over its classical counterpart.

Research paper thumbnail of A quantum genetic algorithm with quantum crossover and mutation operations

In the context of evolutionary quantum computing in the literal meaning, a quantum crossover oper... more In the context of evolutionary quantum computing in the literal meaning, a quantum crossover operation has not been introduced so far. Here, we introduce a novel quantum genetic algorithm which has a quantum crossover procedure performing crossovers among all chromosomes in parallel for each generation. A complexity analysis shows that a quadratic speedup is achieved over its classical counterpart in the dominant factor of the run time to handle each generation.

Research paper thumbnail of Molecular Realizations of Quantum Computing 2007

Liquid-state NMR quantum computer: working principle and some examples / Y. Kondo -- Flux qubits,... more Liquid-state NMR quantum computer: working principle and some examples / Y. Kondo -- Flux qubits, tunable coupling and beyond / A. O. Niskanen -- Josephson phase qubits, and quantum communication via a resonant cavity / M. A. Sillanpää -- Quantum computing using pulse-based electron-nuclear double resonance (ENDOR): molecular spin-qubits / K. Sato ... [et al.] -- Fullerene C[symbol]: a possible molecular quantum computer / T. Wakabayashi -- Molecular magnets for quantum computation / T. Kuroda -- Errors in a plausible scheme of quantum gates in Kane's model / Y. Ota -- Yet another formulation for quantum simultaneous noncooperative bimatrix games / A. SaiToh, R. Rahimi, M. Nakahara -- Continuous-variable teleportation of single-photon states and an accidental cloning of a photonic qubit in two-channel teleportation / T. Ide.

Research paper thumbnail of Molecular realizations of quantum computing 2007. Papers based on the presentations at the symposium, Osaka, Japan, 31 October – 2 November 2007

ABSTRACT Liquid-state NMR quantum computer: working principle and some examples / Y. Kondo -- Flu... more ABSTRACT Liquid-state NMR quantum computer: working principle and some examples / Y. Kondo -- Flux qubits, tunable coupling and beyond / A. O. Niskanen -- Josephson phase qubits, and quantum communication via a resonant cavity / M. A. Sillanpää -- Quantum computing using pulse-based electron-nuclear double resonance (ENDOR): molecular spin-qubits / K. Sato ... [et al.] -- Fullerene C[symbol]: a possible molecular quantum computer / T. Wakabayashi -- Molecular magnets for quantum computation / T. Kuroda -- Errors in a plausible scheme of quantum gates in Kane's model / Y. Ota -- Yet another formulation for quantum simultaneous noncooperative bimatrix games / A. SaiToh, R. Rahimi, M. Nakahara -- Continuous-variable teleportation of single-photon states and an accidental cloning of a photonic qubit in two-channel teleportation / T. Ide.

Research paper thumbnail of Decoherence Suppression in Quantum Systems 2008

Decoherence Suppression in Quantum Systems 2008, Nov 1, 2009

... 2008 7: 45-8: 45 Breakfast 9: 00-10: 30 A. SaiToh, Quantum Wipe EffectI 10: 30-10: 45 CoffeeB... more ... 2008 7: 45-8: 45 Breakfast 9: 00-10: 30 A. SaiToh, Quantum Wipe EffectI 10: 30-10: 45 CoffeeBreak 10: 45-12 ... Daisuke Aratsu Chiara Bagnasco Masamitsu Bando Vahideh Ebrahimi Bakhtavar Frank Gaitan Kenichi Kasamatsu Gen Kimura Yasushi Kondo Osama Moussa Ayumi ...

Research paper thumbnail of Numerical Computation of Time-Dependent Multipartite Nonclassical Correlation

Research paper thumbnail of Erratum to: Hyperfine spin qubits in irradiated malonic acid: heat-bath algorithmic cooling

Quantum Information Processing, 2015

Research paper thumbnail of NMR quantum information processing without pseudo-pure state

An experimental approach is proposed for superdense coding to test the existence of entanglement ... more An experimental approach is proposed for superdense coding to test the existence of entanglement in NMR. This approach does not require any preparation of pseudo-pure state. The result suggests either that the quantitative threshold must be introduced to the experiment to assure the existence of entanglement or that the mathematical criterion for mixed state entanglement is unphysical.

Research paper thumbnail of Mathematical aspects of quantum computing 2007. Papers based on the presentations at the summer school, Osaka, Japan, August 27–29, 2007

Research paper thumbnail of Mathematical Aspects of Quantum Computing 2007

... Manabu Ikeda, Yasushi Inoue, Kaiki Taro Kikuta, Toshiyuki Kobata, Kumi Kondo, Yasushi Markham... more ... Manabu Ikeda, Yasushi Inoue, Kaiki Taro Kikuta, Toshiyuki Kobata, Kumi Kondo, Yasushi Markham, Damian James Harold Minami, Kaori Nagaoka, Shoyu Nakagawa, Nobuo Nakahara, Mikio Ootsuka, Takayoshi Ota, Yukihiro Ozdemir, Sahin Kaya Rahimi Darabad, Robabeh ...

Research paper thumbnail of Mathematical framework for detection and quantification of nonclassical correlation

Quantum information & computation

Existing measures of bipartite nonclassical correlation that is typically characterized by nonvan... more Existing measures of bipartite nonclassical correlation that is typically characterized by nonvanishing nonlocalizable information under the zero-way CLOCC protocol are expensive in computational cost. We define and evaluate economical measures on the basis of a new class of maps, eigenvalue-preserving-but-not-completely-eigenvaluepreserving (EnCE) maps. The class is in analogy to the class of positive-but-notcompletely-positive (PnCP) maps that have been commonly used in the entanglement theories. Linear and nonlinear EnCE maps are investigated. We also prove subadditivity of the measures derived from the maps.

Research paper thumbnail of Quantum Coherence Conservation by Growth in Environmental Dissipation Rate

Quantum coherence conservation is shown to be achieved by a very high rate of dissipation of an e... more Quantum coherence conservation is shown to be achieved by a very high rate of dissipation of an environmental system coupled with a principal system. This effect is not in the list of previously-known strategies of noise suppression, such as Zeno effect, dynamical decoupling, quantum error correction code, and decoherence free subspace. An analytical solution is found for a simplified model of a single qubit coupled with an environmental single qubit dissipating rapidly. We also show examples of coherence conservation in a spin-boson linear coupling model with a numerical evaluation.

Research paper thumbnail of Entanglement of arbitrary spin modes in expanding universe

Quantum Information Processing, 2015

Pair particle creation is a well-known effect on the domain of field theory in curved space-time.... more Pair particle creation is a well-known effect on the domain of field theory in curved space-time. It is shown that the entanglement generations for spin-0 and spin-1/2 modes are different in Friedmann-Robertson-Walker (FRW) space-time. We consider the spin-1 particles in FRW space-time using Duffin-Kemmer-Petiao (DKP) equation and obtain a measure of the generated entanglement. Also, we consider the spin-3/2 particles. We argue that the absolute value of the spin does not play any role in entanglement generation and the differences are due to the bosonic or fermionic properties.

Research paper thumbnail of Decoherence suppression in quantum systems 2008. Papers based on the presentations at the symposium, Kobe, Japan, September 7–10, 2008

Research paper thumbnail of Condensed Matter Theories Volume 24

Research paper thumbnail of Limitation for linear maps in a class for detection and quantification of bipartite nonclassical correlation

Quantum information & computation

Eigenvalue-preserving-but-not-completely-eigenvalue-preserving (EnCE) maps were previously introd... more Eigenvalue-preserving-but-not-completely-eigenvalue-preserving (EnCE) maps were previously introduced for the purpose of detection and quantification of nonclassical correlation, employing the paradigm where nonvanishing quantum discord implies the existence of nonclassical correlation. It is known that only the matrix transposition is nontrivial among Hermiticity-preserving (HP) linear EnCE maps when we use the changes in the eigenvalues of a density matrix due to a partial map for the purpose. In this paper, we prove that this is true even among not-necessarily HP (nnHP) linear EnCE maps. The proof utilizes a conventional theorem on linear preservers. This result imposes a strong limitation on the linear maps and promotes the importance of nonlinear maps.

Research paper thumbnail of Heat Bath Algorithmic Cooling with Spins: Review and Prospects

Application of multiple rounds of Quantum Error Correction (QEC) is an essential milestone toward... more Application of multiple rounds of Quantum Error Correction (QEC) is an essential milestone towards the construction of scalable quantum information processing devices. However, experimental realizations of it are still in their infancy. The requirements for multiple round QEC are high control fidelity and the ability to extract entropy from ancilla qubits. Nuclear Magnetic Resonance (NMR) based quantum devices have demonstrated high control fidelity with up to 12 qubits. On the other hand, the major challenge in the NMR QEC experiment is to efficiently supply ancilla qubits in highly pure states at the beginning of each round of QEC. Purification of qubits in NMR, or in other ensemble based quantum systems can be accomplished through Heat Bath Algorithmic Cooling (HBAC). It is an efficient method for extracting entropy from qubits that interact with a heat bath, allowing cooling below the bath temperature. For practical HBAC, coupled electron-nuclear spin systems are more promising ...