Ali Mahdifar - Academia.edu (original) (raw)
Papers by Ali Mahdifar
Physical review. A/Physical review, A, May 7, 2024
Optics and Photonics Society of Iran, Mar 15, 2018
In this paper, by studying the two-dimensional quantum superintegrable Fokas-Lagerstrom system we... more In this paper, by studying the two-dimensional quantum superintegrable Fokas-Lagerstrom system we show that it is possible to consider the algebra of this system as a deformed Weyl-Heisenberg algebra. Then we construct the coherent states of this system and prove their resolution of identity. We eventually investigate their quantum statistical properties, including the mean number of photons and the Mandel parameter.
Annals of Physics, Apr 1, 2015
The Kepler problem is revisited as a deformed system. The dynamical algebra of this system is kno... more The Kepler problem is revisited as a deformed system. The dynamical algebra of this system is known as a deformed ࣭࣯ሺ2ሻ algebra. The coherent states of the present system are constructed. The associated non-classical features of the system are investigated. The dependence of non-classical features on space curvature is studied.
International Journal of Geometric Methods in Modern Physics, Jun 10, 2013
In this paper, we generalize Schwinger realization of the 𝔰𝔲(2) algebra to construct a two-mode r... more In this paper, we generalize Schwinger realization of the 𝔰𝔲(2) algebra to construct a two-mode realization for deformed 𝔰𝔲(2) algebra on a sphere. We obtain a nonlinear (f-deformed) Schwinger realization with a deformation function corresponding to the curvature of sphere that in the flat limit tends to unity. With the use of this nonlinear two-mode algebra, we construct the associated two-mode coherent states (CSs) on the sphere and investigate their quantum entanglement. We also compare the quantum statistical properties of the two modes of the constructed CSs, including anticorrelation and antibunching effects. Particularly, the influence of the curvature of the physical space on the nonclassical properties of two modes is clarified.
Optics and Photonics Society of Iran, Mar 10, 2019
In this paper, we study the geometric phase of a two-level atom near a dissipative nano-sphere. F... more In this paper, we study the geometric phase of a two-level atom near a dissipative nano-sphere. For this purpose, by applying the Von-Neumann equation, we obtain the reduced density operator of the atomic system in the Markov and the rotating-wave approximations. Then, by specifying the eigenvalues and the eigenvectors of the reduced density operator, the Lamb shift and transition rates in terms of the Green tensor of system are obtained. Finally, by calculating the Green tensor of system and making use of the kinematic approach, the geometric phase is calculated. We observe that the geometric phase near the excitation frequency of the polariton-phonons in the sphere will be drastically changed.
Iranian Journal of Physics Research, Sep 1, 2019
In this paper, we construct the Gazeau-Klauder coherent states of a two-dimensional harmonic osci... more In this paper, we construct the Gazeau-Klauder coherent states of a two-dimensional harmonic oscillator on a sphere based on two equivalent approaches. First, we consider the oscillator on the sphere as a deformed (non-degenerate) onedimensional oscillator. Second, the oscillator on the sphere is considered as the usual (degenerate) two-dimensional oscillator. Then, by investigating the quantum optical properties of the constructed coherent states, we study the effect of the space curvature on the properties of the constructed sphere Gazeau-Klauder coherent states, according to these two approaches.
Iranian Journal of Physics Research, Sep 1, 2018
In this paper, we consider a system including two maghnetodielectric slabs with different tempera... more In this paper, we consider a system including two maghnetodielectric slabs with different temperatures that are placed in vacuum at the zero temperature and with very short separation distances from each other. Based on the canonical quantization of the electromagnetic field in the presence of dissipative media, we investigate the radiative heat transfer arising from thermal and quantum fluctuations out of the thermal equilibrium but under the stationary situation. For this purpose, we calculate the ensemble average of the Poynting vector by driving the quantum correlation relations between noise polarization and magnetization operators and extracting the electromagnetic Green tensor of the system. Finally, we analyze the transferred radiation of the aforementioned system by employing the numerical results of the Poynting vector.
Optics and Photonics Society of Iran, Mar 10, 2019
In this paper, we study the entanglement of two level atoms near a spherical silver nanoparticle.... more In this paper, we study the entanglement of two level atoms near a spherical silver nanoparticle. By employing the Von Neumann equation and making use of the electromagnetic Green tensor associated with a dispersive and dissipative dielectric sphere, the decay rates and the Lamb shift of the atomic system are obtained. Then, by using the concurrence measure, we calculate the degree of entanglement of the atomic system. We observe that decay rates severely increase near the excitation frequency of the localized Polariton-Plasmons, while the concurrence value is nearly zero.
Iranian Journal of Physics Research, May 1, 2017
DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2014
In this paper, in order to study a nonlinear dissipative cavity a linear master equation of the c... more In this paper, in order to study a nonlinear dissipative cavity a linear master equation of the cavity in generalized to a nonlinear one at zero temperature. Then, it is shown that nonlinear coherent states are the only preferred states of the system under decoherence.
International journal of optics and photonics, 2020
In this paper, we study the entanglement of two-level atoms near a spherical silver nanoparticle.... more In this paper, we study the entanglement of two-level atoms near a spherical silver nanoparticle. By employing the Von Neumann equation and utilizing of the electromagnetic Green's tensor associated with a dispersive and dissipative dielectric sphere, the decay rates and the Lamb shift of the atomic system are obtained. Then, by using the concurrence measure, we calculate the degree of entanglement of the atomic system. We observe that the decay rates severely increase near the excitation frequency of the localized plasmon-polariton, while the concurrence value is nearly zero.
Optics and Photonics Society of Iran, Feb 10, 2016
In this paper, in order to investigate the quantum effects of optical Schwarzschild black holes, ... more In this paper, in order to investigate the quantum effects of optical Schwarzschild black holes, we calculate the spontaneous emission of an excited two-level atom in the vicinity of optical Schwarzschild black holes which has the most resemble with the real black holes. Given that the spontaneous emission rate depends on the imaginary part of the Green tensor of system, and on the other hand Schwarzschild black holes have a cylindrical structure with the inhomogeneous and anisotropic optical parameters. So, we calculate the Green tensor of system and subsequently the spontaneous emission rate by modeling aforementioned black hole via some concentric cylindrical layers.
Iranian Journal of Physics Research, Feb 1, 2017
Optics and Photonics Society of Iran, Feb 15, 2014
In this paper, the thermal effects of the dispersive and absorbing dielectric slab on non-classic... more In this paper, the thermal effects of the dispersive and absorbing dielectric slab on non-classical properties of the incident states are investigated. Accordingly, we consider the incident rightward and leftward states on the dielectric slab as a nonlinear coherent state on a sphere and the quantum vacuum state, respectively. Then, by modeling the electric permittivity function of the dielectric slab with the Lorentz model, the quadrature squeezing and the Mandel parameter are calculated.
Iranian Journal of Physics Research, 2013
Optics and Photonics Society of Iran, 2016
هدیکچ – هلاقم نیا رد ک تارثا یسررب روظنم هب یموتناو هایس هلاچ ياه ا پ یکیت هبدوخ لیسگ هبساحم هب و... more هدیکچ – هلاقم نیا رد ک تارثا یسررب روظنم هب یموتناو هایس هلاچ ياه ا پ یکیت هبدوخ لیسگ هبساحم هب ود متا کی يدوخ هتخیگنارب يزارت هایس روضح رد هلاچ ا ياه پ یکیت تراوش ز هایس هب ار تهابش نیرتشیب هک دلیش هلاچ دنراد یعقاو ياه یم میزادرپ گنهآ هکنیا هب هجوت اب . هبدوخ لیسگ ب هناماس نیرگ روسنات یموهوم تمسق هب يدوخ هایس رگید فرط زا و دراد یگتس هلاچ ياه زتراوش هناوتسا راتخاس دلیش يا تباث اب لکش ا ياه پ یکیت هایس يزاسوگلا اب نیاربانب ،دنراد نگمهان و درگناسمهان هلاچ روبزم هناوتسا هیلا يدادعت طسوت مه يا هب زکرم هبساحم هناماس نیرگ روسنات ي هبدوخ لیسگ گنهآ ابقاعتم و يدوخ یم .میزادرپ
Iranian Journal of Physics Research, 2014
In order to investigate the effect of a medium with dissipation and dispersion and also the curva... more In order to investigate the effect of a medium with dissipation and dispersion and also the curvature of the physical space on the properties of the incident quantum states, we use the quantization of electromagnetic field based on phenomenological approach to obtain input-output relations between radiations on both sides of dielectric slab. By using these relations the fidelity, the Wigner function, and also the quantum correlation of the outgoing state through dielectric slab are obtained for a situation in which the rightward incident state is a nonlinear coherent state on a sphere and the leftward incident state is a vacuum state. Here, the incident states are considered monochromatic and the modeling of the medium is given by the Lorentz' model. Accordingly, we study nonclassical properties of the output states such as the quantum entanglement. It will be observed that the nonclassical properties of the outgoing states depend strongly on the optical property of the medium a...
Iranian Journal of Physics Research, 2018
In this paper, we consider a system including two maghnetodielectric slabs with different tempera... more In this paper, we consider a system including two maghnetodielectric slabs with different temperatures that are placed in vacuum at the zero temperature and with very short separation distances from each other. Based on the canonical quantization of the electromagnetic field in the presence of dissipative media, we investigate the radiative heat transfer arising from thermal and quantum fluctuations out of the thermal equilibrium but under the stationary situation. For this purpose, we calculate the ensemble average of the Poynting vector by driving the quantum correlation relations between noise polarization and magnetization operators and extracting the electromagnetic Green tensor of the system. Finally, we analyze the transferred radiation of the aforementioned system by employing the numerical results of the Poynting vector.
Physical review. A/Physical review, A, May 7, 2024
Optics and Photonics Society of Iran, Mar 15, 2018
In this paper, by studying the two-dimensional quantum superintegrable Fokas-Lagerstrom system we... more In this paper, by studying the two-dimensional quantum superintegrable Fokas-Lagerstrom system we show that it is possible to consider the algebra of this system as a deformed Weyl-Heisenberg algebra. Then we construct the coherent states of this system and prove their resolution of identity. We eventually investigate their quantum statistical properties, including the mean number of photons and the Mandel parameter.
Annals of Physics, Apr 1, 2015
The Kepler problem is revisited as a deformed system. The dynamical algebra of this system is kno... more The Kepler problem is revisited as a deformed system. The dynamical algebra of this system is known as a deformed ࣭࣯ሺ2ሻ algebra. The coherent states of the present system are constructed. The associated non-classical features of the system are investigated. The dependence of non-classical features on space curvature is studied.
International Journal of Geometric Methods in Modern Physics, Jun 10, 2013
In this paper, we generalize Schwinger realization of the 𝔰𝔲(2) algebra to construct a two-mode r... more In this paper, we generalize Schwinger realization of the 𝔰𝔲(2) algebra to construct a two-mode realization for deformed 𝔰𝔲(2) algebra on a sphere. We obtain a nonlinear (f-deformed) Schwinger realization with a deformation function corresponding to the curvature of sphere that in the flat limit tends to unity. With the use of this nonlinear two-mode algebra, we construct the associated two-mode coherent states (CSs) on the sphere and investigate their quantum entanglement. We also compare the quantum statistical properties of the two modes of the constructed CSs, including anticorrelation and antibunching effects. Particularly, the influence of the curvature of the physical space on the nonclassical properties of two modes is clarified.
Optics and Photonics Society of Iran, Mar 10, 2019
In this paper, we study the geometric phase of a two-level atom near a dissipative nano-sphere. F... more In this paper, we study the geometric phase of a two-level atom near a dissipative nano-sphere. For this purpose, by applying the Von-Neumann equation, we obtain the reduced density operator of the atomic system in the Markov and the rotating-wave approximations. Then, by specifying the eigenvalues and the eigenvectors of the reduced density operator, the Lamb shift and transition rates in terms of the Green tensor of system are obtained. Finally, by calculating the Green tensor of system and making use of the kinematic approach, the geometric phase is calculated. We observe that the geometric phase near the excitation frequency of the polariton-phonons in the sphere will be drastically changed.
Iranian Journal of Physics Research, Sep 1, 2019
In this paper, we construct the Gazeau-Klauder coherent states of a two-dimensional harmonic osci... more In this paper, we construct the Gazeau-Klauder coherent states of a two-dimensional harmonic oscillator on a sphere based on two equivalent approaches. First, we consider the oscillator on the sphere as a deformed (non-degenerate) onedimensional oscillator. Second, the oscillator on the sphere is considered as the usual (degenerate) two-dimensional oscillator. Then, by investigating the quantum optical properties of the constructed coherent states, we study the effect of the space curvature on the properties of the constructed sphere Gazeau-Klauder coherent states, according to these two approaches.
Iranian Journal of Physics Research, Sep 1, 2018
In this paper, we consider a system including two maghnetodielectric slabs with different tempera... more In this paper, we consider a system including two maghnetodielectric slabs with different temperatures that are placed in vacuum at the zero temperature and with very short separation distances from each other. Based on the canonical quantization of the electromagnetic field in the presence of dissipative media, we investigate the radiative heat transfer arising from thermal and quantum fluctuations out of the thermal equilibrium but under the stationary situation. For this purpose, we calculate the ensemble average of the Poynting vector by driving the quantum correlation relations between noise polarization and magnetization operators and extracting the electromagnetic Green tensor of the system. Finally, we analyze the transferred radiation of the aforementioned system by employing the numerical results of the Poynting vector.
Optics and Photonics Society of Iran, Mar 10, 2019
In this paper, we study the entanglement of two level atoms near a spherical silver nanoparticle.... more In this paper, we study the entanglement of two level atoms near a spherical silver nanoparticle. By employing the Von Neumann equation and making use of the electromagnetic Green tensor associated with a dispersive and dissipative dielectric sphere, the decay rates and the Lamb shift of the atomic system are obtained. Then, by using the concurrence measure, we calculate the degree of entanglement of the atomic system. We observe that decay rates severely increase near the excitation frequency of the localized Polariton-Plasmons, while the concurrence value is nearly zero.
Iranian Journal of Physics Research, May 1, 2017
DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2014
In this paper, in order to study a nonlinear dissipative cavity a linear master equation of the c... more In this paper, in order to study a nonlinear dissipative cavity a linear master equation of the cavity in generalized to a nonlinear one at zero temperature. Then, it is shown that nonlinear coherent states are the only preferred states of the system under decoherence.
International journal of optics and photonics, 2020
In this paper, we study the entanglement of two-level atoms near a spherical silver nanoparticle.... more In this paper, we study the entanglement of two-level atoms near a spherical silver nanoparticle. By employing the Von Neumann equation and utilizing of the electromagnetic Green's tensor associated with a dispersive and dissipative dielectric sphere, the decay rates and the Lamb shift of the atomic system are obtained. Then, by using the concurrence measure, we calculate the degree of entanglement of the atomic system. We observe that the decay rates severely increase near the excitation frequency of the localized plasmon-polariton, while the concurrence value is nearly zero.
Optics and Photonics Society of Iran, Feb 10, 2016
In this paper, in order to investigate the quantum effects of optical Schwarzschild black holes, ... more In this paper, in order to investigate the quantum effects of optical Schwarzschild black holes, we calculate the spontaneous emission of an excited two-level atom in the vicinity of optical Schwarzschild black holes which has the most resemble with the real black holes. Given that the spontaneous emission rate depends on the imaginary part of the Green tensor of system, and on the other hand Schwarzschild black holes have a cylindrical structure with the inhomogeneous and anisotropic optical parameters. So, we calculate the Green tensor of system and subsequently the spontaneous emission rate by modeling aforementioned black hole via some concentric cylindrical layers.
Iranian Journal of Physics Research, Feb 1, 2017
Optics and Photonics Society of Iran, Feb 15, 2014
In this paper, the thermal effects of the dispersive and absorbing dielectric slab on non-classic... more In this paper, the thermal effects of the dispersive and absorbing dielectric slab on non-classical properties of the incident states are investigated. Accordingly, we consider the incident rightward and leftward states on the dielectric slab as a nonlinear coherent state on a sphere and the quantum vacuum state, respectively. Then, by modeling the electric permittivity function of the dielectric slab with the Lorentz model, the quadrature squeezing and the Mandel parameter are calculated.
Iranian Journal of Physics Research, 2013
Optics and Photonics Society of Iran, 2016
هدیکچ – هلاقم نیا رد ک تارثا یسررب روظنم هب یموتناو هایس هلاچ ياه ا پ یکیت هبدوخ لیسگ هبساحم هب و... more هدیکچ – هلاقم نیا رد ک تارثا یسررب روظنم هب یموتناو هایس هلاچ ياه ا پ یکیت هبدوخ لیسگ هبساحم هب ود متا کی يدوخ هتخیگنارب يزارت هایس روضح رد هلاچ ا ياه پ یکیت تراوش ز هایس هب ار تهابش نیرتشیب هک دلیش هلاچ دنراد یعقاو ياه یم میزادرپ گنهآ هکنیا هب هجوت اب . هبدوخ لیسگ ب هناماس نیرگ روسنات یموهوم تمسق هب يدوخ هایس رگید فرط زا و دراد یگتس هلاچ ياه زتراوش هناوتسا راتخاس دلیش يا تباث اب لکش ا ياه پ یکیت هایس يزاسوگلا اب نیاربانب ،دنراد نگمهان و درگناسمهان هلاچ روبزم هناوتسا هیلا يدادعت طسوت مه يا هب زکرم هبساحم هناماس نیرگ روسنات ي هبدوخ لیسگ گنهآ ابقاعتم و يدوخ یم .میزادرپ
Iranian Journal of Physics Research, 2014
In order to investigate the effect of a medium with dissipation and dispersion and also the curva... more In order to investigate the effect of a medium with dissipation and dispersion and also the curvature of the physical space on the properties of the incident quantum states, we use the quantization of electromagnetic field based on phenomenological approach to obtain input-output relations between radiations on both sides of dielectric slab. By using these relations the fidelity, the Wigner function, and also the quantum correlation of the outgoing state through dielectric slab are obtained for a situation in which the rightward incident state is a nonlinear coherent state on a sphere and the leftward incident state is a vacuum state. Here, the incident states are considered monochromatic and the modeling of the medium is given by the Lorentz' model. Accordingly, we study nonclassical properties of the output states such as the quantum entanglement. It will be observed that the nonclassical properties of the outgoing states depend strongly on the optical property of the medium a...
Iranian Journal of Physics Research, 2018
In this paper, we consider a system including two maghnetodielectric slabs with different tempera... more In this paper, we consider a system including two maghnetodielectric slabs with different temperatures that are placed in vacuum at the zero temperature and with very short separation distances from each other. Based on the canonical quantization of the electromagnetic field in the presence of dissipative media, we investigate the radiative heat transfer arising from thermal and quantum fluctuations out of the thermal equilibrium but under the stationary situation. For this purpose, we calculate the ensemble average of the Poynting vector by driving the quantum correlation relations between noise polarization and magnetization operators and extracting the electromagnetic Green tensor of the system. Finally, we analyze the transferred radiation of the aforementioned system by employing the numerical results of the Poynting vector.