The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Kaifeng Zhao - One of the best experts on this subject based on the ideXlab platform.
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Spin-Noise Spectrum in a pulse-modulated field.
Optics express, 2020Co-Authors: Guiying Zhang, Ya Wen, Jian Qiu, Kaifeng ZhaoAbstract:We measure the spin Noise Spectrum (SNS) of a thermal Rubidium vapor in a pulse-modulated transverse magnetic field and develop a simple theory to describe the main structure of the SNS. Notably, when the pulse area is equal to π, the SNS consists of resonances centered at half-odd-integer multiples of the modulation frequency, while revealing the spin dynamics of the system in a zero field. Our study opens a promising way of studying zero-field spin dynamics by spin Noise Spectrum free from any low-frequency environmental disturbances.
Jinshuang Jin - One of the best experts on this subject based on the ideXlab platform.
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Mechanism of current Noise Spectrum in a nonequilibirum Kondo dot system.
arXiv: Mesoscale and Nanoscale Physics, 2020Co-Authors: Hong Mao, Jinshuang Jin, Shikuan Wang, Yijing YanAbstract:We systematically study the nonequilibirum Kondo mechanisms of quantum Noise Spectrum based on the accurate dissipaton--equation--of--motion evaluations. By comparing the Noise spectra between the equilibrium and nonequilibrium cases and between the non-Kondo and Kondo regimes, we identify the nonequilibrium Kondo features in the current Noise Spectrum, appearing in the region of $\omega\in [-eV, eV]$. The Kondo characteristic at $\omega=\pm eV=\pm (\mu_{\rm L}-\mu_{\rm R})$ display asymmetrical upturns and remarkable peaks in $S(\omega)$ and $dS(\omega)/d\omega$, respectively. These features are originated from the Rabi interference of the transport current dynamics, with the Kondo oscillation frequency of $|eV|$. The minor but very distinguishable inflections, crossing over $\omega=-eV$ to $\omega=+eV$, would be related to a sort of Kondo-Fano interference between two Kondo resonances channels.
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Noise Spectrum of quantum transport through double quantum dots: Renormalization and non-Markovian effects
AIP Advances, 2016Co-Authors: Pengqin Shi, Yaofeng Ying, Jinshuang JinAbstract:Based on the time-nonlocal particle number-resolved master equation, we investigate the sequential electron transport through the interacting double quantum dots. Our calculations show that there exists the effect of energy renormalization in the dispersion of the bath interaction Spectrum and it is sensitive to the the bandwidth of the bath. This effect would strongly affect the stationary current and its zero-frequency shot Noise for weak inter-dot coherent coupling strength, but for strong inter-dot coupling regime, it is negligible due to the strong intrinsic Rabi coherent dynamics. Moreover, the possible observable effects of the energy renormalization in the Noise Spectrum are also investigated through the Rabi coherence signal. Finally, the non-Markovian effect is manifested in the finite-frequency Noise Spectrum with the appearance of quasisteps, and the magnitude of these quasisteps are modified by the dispersion function.
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Noise Spectrum of a quantum dot-resonator lasing circuit
New Journal of Physics, 2013Co-Authors: Jinshuang Jin, Michael Marthaler, Pei-qing Jin, Dmitry S. Golubev, Gerd SchönAbstract:Single-electron tunneling processes through a double quantum dot can induce a lasing state in an electromagnetic resonator which is coupled coherently to the dot system. Here we study the Noise properties of the transport current in the lasing regime, i.e., both the zero-frequency shot Noise as well as the Noise Spectrum. The former shows a remarkable super-Poissonian behavior when the system approaches the lasing transition, but sub-Poissonian behavior deep in the lasing state. The Noise Spectrum contains information about the coherent dynamics of the coupled dot-resonator system. It shows pronounced structure at a frequency matching that of the resonator due to the excitation of photons. For strong interdot Coulomb interaction we find asymmetries in the auto-correlation Noise spectra of the left and right junctions, which we trace back to asymmetries in the incoherent tunneling channels.
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Non-Markovian shot Noise Spectrum of quantum transport through quantum dots
Journal of Applied Physics, 2011Co-Authors: Jinshuang Jin, Meng Luo, Yijing YanAbstract:The generalized quantum master equation with transport particle number resolution, similar to its conventional unconditioned counterpart, also has time-local and time-nonlocal configurations. The latter is found to be more suitable for the effect of an electrode’s bandwidth on quantum transport and Noise Spectrum for weak system-reservoir coupling, as calibrated with the exact results in the absence of a Coulomb interaction. We further analyze the effect of the Coulomb interaction on the Noise Spectrum of the transport current through quantum dot systems, and show that the realistic finite Coulomb interaction and finite bandwidth are manifested only with the non-Markovian treatment. We demonstrate a number of non-Markovian characteristics of the shot Noise Spectrum, including that which is due to finite bandwidth and that which is sensitive to and enhanced by the magnitude of the Coulomb interaction.
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Non-Markovian shot Noise Spectrum of quantum transport through quantum dots
arXiv: Strongly Correlated Electrons, 2008Co-Authors: Jinshuang Jin, Meng Luo, Yijing YanAbstract:The generalized quantum master equation with transport particle number resolution, like its conventional unconditioned counterpart, has also the time-local and time-nonlocal prescriptions.The latter is found to be more suitable for the effect of electrodes bandwidth on quantum transport and Noise Spectrum for weak system-reservoir coupling, as calibrated with the exact results in the absence of Coulomb interaction. We further analyze the effect of Coulomb interaction on the Noise Spectrum of transport current through quantum dot systems, and show that the realistic finite Coulomb interaction and finite bandwidth are manifested only with non-Markovian treatment. We demonstrate a number of non-Markovian characteristics of shot Noise Spectrum, including that due to finite bandwidth and that sensitive to and enhanced by the magnitude of Coulomb interaction.
Yijing Yan - One of the best experts on this subject based on the ideXlab platform.
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Mechanism of current Noise Spectrum in a nonequilibirum Kondo dot system.
arXiv: Mesoscale and Nanoscale Physics, 2020Co-Authors: Hong Mao, Jinshuang Jin, Shikuan Wang, Yijing YanAbstract:We systematically study the nonequilibirum Kondo mechanisms of quantum Noise Spectrum based on the accurate dissipaton--equation--of--motion evaluations. By comparing the Noise spectra between the equilibrium and nonequilibrium cases and between the non-Kondo and Kondo regimes, we identify the nonequilibrium Kondo features in the current Noise Spectrum, appearing in the region of $\omega\in [-eV, eV]$. The Kondo characteristic at $\omega=\pm eV=\pm (\mu_{\rm L}-\mu_{\rm R})$ display asymmetrical upturns and remarkable peaks in $S(\omega)$ and $dS(\omega)/d\omega$, respectively. These features are originated from the Rabi interference of the transport current dynamics, with the Kondo oscillation frequency of $|eV|$. The minor but very distinguishable inflections, crossing over $\omega=-eV$ to $\omega=+eV$, would be related to a sort of Kondo-Fano interference between two Kondo resonances channels.
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Non-Markovian shot Noise Spectrum of quantum transport through quantum dots
Journal of Applied Physics, 2011Co-Authors: Jinshuang Jin, Meng Luo, Yijing YanAbstract:The generalized quantum master equation with transport particle number resolution, similar to its conventional unconditioned counterpart, also has time-local and time-nonlocal configurations. The latter is found to be more suitable for the effect of an electrode’s bandwidth on quantum transport and Noise Spectrum for weak system-reservoir coupling, as calibrated with the exact results in the absence of a Coulomb interaction. We further analyze the effect of the Coulomb interaction on the Noise Spectrum of the transport current through quantum dot systems, and show that the realistic finite Coulomb interaction and finite bandwidth are manifested only with the non-Markovian treatment. We demonstrate a number of non-Markovian characteristics of the shot Noise Spectrum, including that which is due to finite bandwidth and that which is sensitive to and enhanced by the magnitude of the Coulomb interaction.
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Non-Markovian shot Noise Spectrum of quantum transport through quantum dots
arXiv: Strongly Correlated Electrons, 2008Co-Authors: Jinshuang Jin, Meng Luo, Yijing YanAbstract:The generalized quantum master equation with transport particle number resolution, like its conventional unconditioned counterpart, has also the time-local and time-nonlocal prescriptions.The latter is found to be more suitable for the effect of electrodes bandwidth on quantum transport and Noise Spectrum for weak system-reservoir coupling, as calibrated with the exact results in the absence of Coulomb interaction. We further analyze the effect of Coulomb interaction on the Noise Spectrum of transport current through quantum dot systems, and show that the realistic finite Coulomb interaction and finite bandwidth are manifested only with non-Markovian treatment. We demonstrate a number of non-Markovian characteristics of shot Noise Spectrum, including that due to finite bandwidth and that sensitive to and enhanced by the magnitude of Coulomb interaction.
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Characteristic features in non-Markovian Noise Spectrum of transport current
2008Co-Authors: Jinshuang Jin, Yijing YanAbstract:Based on the construction of an efficient scheme for non-Markovian Noise calculation, we analyze the Noise Spectrum of transport current through interacting single quantum dot and double dots. We show that the non-Markovian correction is remarkable. It leads to a number of characteristic spectral structures, including that due to finite bandwidth and that sensitive to and enhanced by the magnitude of Coulomb interaction.
Mehdi Alouini - One of the best experts on this subject based on the ideXlab platform.
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Direct Observation of Slow Light in the Noise Spectrum of a Laser
2011Co-Authors: A. El Amili, B.-x. Miranda, Fabienne Goldfarb, Ghaya Baili, Grégoire Beaudoin, Isabelle Sagnes, Fabien Bretenaker, Mehdi AlouiniAbstract:The role of coherent population oscillations is evidenced in the Noise Spectrum of an ultra-low Noise laser. The coherent population oscillations manifest themselves through their associated dispersion probed by the non-lasing side modes.
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Direct Observation of Slow Light in the Noise Spectrum of a Laser
CLEO:2011 - Laser Applications to Photonic Applications, 2011Co-Authors: A. El Amili, B.-x. Miranda, Fabienne Goldfarb, Ghaya Baili, Grégoire Beaudoin, Isabelle Sagnes, Fabien Bretenaker, Mehdi AlouiniAbstract:International audienceThe role of coherent population oscillations is evidenced in the Noise Spectrum of an ultra-low Noise laser. The coherent population oscillations manifest themselves through their associated dispersion probed by the non-lasing side modes
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Observation of slow light in the Noise Spectrum of a vertical external cavity surface-emitting laser.
Physical review letters, 2010Co-Authors: A. El Amili, B.-x. Miranda, Fabienne Goldfarb, Ghaya Baili, Grégoire Beaudoin, Isabelle Sagnes, Fabien Bretenaker, Mehdi AlouiniAbstract:The role of coherent population oscillations is evidenced in the Noise Spectrum of an ultralow Noise laser. This effect is isolated in the intensity Noise Spectrum of an optimized single-frequency vertical external cavity surface-emitting laser. The coherent population oscillations induced by the lasing mode manifest themselves through their associated dispersion that leads to slow light effects probed by the spontaneous emission present in the nonlasing side modes.
Guiying Zhang - One of the best experts on this subject based on the ideXlab platform.
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Spin-Noise Spectrum in a pulse-modulated field.
Optics express, 2020Co-Authors: Guiying Zhang, Ya Wen, Jian Qiu, Kaifeng ZhaoAbstract:We measure the spin Noise Spectrum (SNS) of a thermal Rubidium vapor in a pulse-modulated transverse magnetic field and develop a simple theory to describe the main structure of the SNS. Notably, when the pulse area is equal to π, the SNS consists of resonances centered at half-odd-integer multiples of the modulation frequency, while revealing the spin dynamics of the system in a zero field. Our study opens a promising way of studying zero-field spin dynamics by spin Noise Spectrum free from any low-frequency environmental disturbances.
