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Comparison of analytical and numerical methods and the effect of bath coupling on the quantum decoherence
comparison analytical and numerical methods quantum decoherence
2010/11/8
The dynamics of a qubit in a structured environment is investigated theoretically. One point of view of the model is the spin-boson model with a Lorentz shaped spectral density. An alternative view is...
Strong gate coupling of high-Q nanomechanical resonators
nanomechanics NEMS quantum limit detection dissipation
2010/11/24
The detection of mechanical vibrations near the quantum limit is a formidable challenge since the displacement becomes vanishingly small when the number of phonon quanta tends towards zero.
An intere...
Spin Accumulation in a Quantum Wire with Rashba Spin-Orbit Coupling
Spin Accumulation Rashba Spin-Orbit Coupling Quantum Wire
2009/9/4
We investigate theoretically the spin accumulation in a Rashba spin-orbit coupling quantum wire. Using the scattering matrix approach within the effective free-electron approximation, we have demonstr...
Physical mechanisms of interface-mediated intervalley coupling in Si
Physical mechanisms interface-mediated intervalley coupling Si
2010/4/16
The conduction band degeneracy in Si is detrimental to quantum computing based on spin qubits, for which a nondegenerate ground orbital state is desirable. This degeneracy is lifted at an interface wi...
Magnetic Moment Coupling to Circularly Polarized Photons
Magnetic Moment Circularly Polarized Photons
2010/4/8
Exact stationary solutions of the wave equation are obtained to describe the interaction between magnetic moment of elementary particle and circularly polarized photons. The obtained solutions substan...
Quantum Mechanics of Successive Measurements with Arbitrary Meter Coupling
Quantum Mechanics Successive Measurements Arbitrary Meter Coupling
2010/4/9
We study successive measurements of two observables using von Neumann's measurement model. The two-pointer correlation for arbitrary coupling strength allows retrieving the initial system state. We re...
Low-loss negative refraction by laser induced magneto-electric cross-coupling
Low-loss negative refraction laser magneto-electric cross-coupling
2010/4/7
We discuss the feasibility of negative refraction with reduced absorption in coherently driven atomic media. Coherent coupling of an electric and a magnetic dipole transition by laser fields induces m...
Exact Solution of Quantum Dynamics of a Cantilever Coupling to aSingle Trapped Ultracold Ion
ultracold ion cantilever squeezed-state
2007/8/15
2007Vol.47No.3pp.561-566DOI:
Exact Solution of Quantum Dynamics of a Cantilever Coupling to aSingle Trapped Ultracold Ion
LIU Tao,1 FENG Mang,1,2 and WANG Ke-Lin1,3
1 Th...
Effect of the Electron-LO-Phonon Coupling on an Exciton Quantum
Dot
exciton electron-phonon coupling quantum dot
2007/8/15
2002Vol.38No.3pp.375-378DOI:
Effect of the Electron-LO-Phonon Coupling on an Exciton Quantum
Dot
XIE Wen-Fang and ZHU Wu
Department of Physics, Guangzhou University, Gua...
Quantum Effects of Mesoscopic Inductance and Capacity Coupling Circuits
mesoscopic circuit Mathieu equation quantum effect
2007/8/15
2006Vol.45No.6pp.1126-1130DOI:
Quantum Effects of Mesoscopic Inductance and Capacity Coupling Circuits
LIU Jian-Xin,1 YAN Zhan-Yuan,2 and SONG Yong-Hua3
1 Department o...
Effect of the Electron-Phonon Coupling on Barrier D-
Quantum Dots in Magnetic Fields
quantum dot
electron-phonon interaction few-body physics
2007/8/15
2002Vol.37No.1pp.99-104DOI:
Effect of the Electron-Phonon Coupling on Barrier D-
Quantum Dots in Magnetic Fields
XIE Wen-Fang
Department of Physics, Guangzhou Universit...
Quantum Fluctuation of a Mesoscopic Inductance
Coupling Circuit at Finite Temperature
mesoscopic inductance coupling circuit quantum
fluctuation Joule heat effects
2007/8/15
2003Vol.39No.4pp.447-450DOI:
Quantum Fluctuation of a Mesoscopic Inductance
Coupling Circuit at Finite Temperature
SONG Tong-Qiang and ZHU Yue-Jin
Department of Physic...