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Quantum dot Rabi rotations beyond the weak exciton-phonon coupling regime
Quantum dot Rabi rotations weak exciton-phonon coupling regime
2010/10/21
We study the excitonic dynamics of a driven quantum dot under the influence of a phonon
environment, going beyond the weak exciton-phonon coupling approximation. By combining the
polaron transform a...
Determination of the vacuum optomechanical coupling rate using frequency noise calibration
Determination vacuum optomechanical coupling frequency noise calibration
2010/10/20
The strength of optomechanical interactions in a cavity optomechanical system can be quantified by a vacuum coupling rate g0 analogous to cavity quantum electrodynamics. This single figure of merit re...
On Duffin-Kemmer-Petiau particles with a mixed minimal-nonminimal vector coupling and the nondegenerate bound states for the one-dimensional inversely linear background
Duffin-Kemmer-Petiau theory nonminimal coupling Klein’s paradox hydrogen atom
2010/10/27
The problem of spin-0 and spin-1 bosons in the background of a general mixing of minimal and
nonminimal vector inversely linear potentials is explored in a unified way in the context of the Duffin-Ke...
Strong coupling，charm- and bottom-quark masses from electron-positron annihilation
strong coupling quark masses
2010/5/7
The cross section for electron-positron annihilation into hadrons allows for a precise determination of the strong coupling constant and the charm- and bottom-quark masses. Recent theoretical and expe...
Time evolution of Wigner functions governed by bipartite Hamiltonian system with kinetic coupling
entangled Wigner operator Wigner function evolution entangled state representation
2010/6/30
For the bipartite Hamiltonian system with kinetic coupling, we derive time evolution equation of Wigner functions by virtue of the bipartite entangled state representation and entangled Wigner operato...
Analysis of the coupling constants ga0ηπ0 and ga0η′π0 with light-cone QCD sum rules
a0(980) light-cone QCD sum rules
2009/12/24
In this article, we take the point of view that the light scalar meson a0(980) is a conventional qq state, and calculate the coupling constants ga0ηπ0 and ga0η′π0 with the light-cone QCD sum rules. Th...
Study of spin sum rules (and the strong coupling constant at large distances)
Strong coupling constant QCD spin sum rules non-perturbative commensurate scale relations Schwinger-Dyson Lattice QCD AdS/CFT
2009/11/24
We present recent results from Jefferson Lab on sum rules related to the spin structure of the nucleon. We then discuss how the Bjorken sum rule with its connection to the Gerasimov-Drell-Hearn sum, a...
Kinetic simulations of the coupling between current instabilities and reconnection in thin current sheets
Kinetic simulations current instabilities thin current sheets
2009/11/13
We investigate the coupling between current and tearing instability modes of a thin current sheet using the particle code GISMO. We identify pure tearing modes (kx≠ 0), instabilities in the current fl...
Right on time: Measuring Kuramoto model coupling from a survey of wristwatches
couple doscillators Kuramoto model complex networks synchro-nization
2010/4/7
Using a survey of wristwatch synchronization from a randomly selected group of independent volunteers, one can model the system as a Kuramoto-type coupled oscillator network. Based on the phase data, ...
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...
Structures of N=7 and N=8 isotones with l2 coupling
shell model l2 coupling level inversion
2009/8/14
The structures of N=7 and N=8 isotones in Be-F mass range are investigated in the framework of the single-particle shell model. Different from the traditional potential terms, the l2 coupling is incl...
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...