scholarly journals Anomalous Hall conductivity due to vector spin chirality in the weak coupling regime

2009 ◽  
Vol 79 (5) ◽  
Author(s):  
Katsuhisa Taguchi ◽  
Gen Tatara
Keyword(s):  
Weak Coupling ◽  
Hall Conductivity ◽  
Weak Coupling Regime ◽  
Vector Spin Chirality

Shared-mode assisted resonant energy transfer in the weak coupling regime

2009 ◽  
Vol 130 (21) ◽  
pp. 214505 ◽  
Author(s):  
E. Hennebicq ◽  
D. Beljonne ◽  
C. Curutchet ◽  
G. D. Scholes ◽  
R. J. Silbey
Keyword(s):  
Energy Transfer ◽  
Weak Coupling ◽  
Weak Coupling Regime ◽  
Resonant Energy ◽  
Resonant Energy Transfer

Transition from strong to weak coupling regime with lowering Tc in Tl2Ba2CuO6+x

1994 ◽  
Vol 235-240 ◽  
pp. 1613-1614
Author(s):  
O.M. Vyaselev ◽  
N.N. Kolesnikov ◽  
I.F. Schegolev
Keyword(s):  
Weak Coupling ◽  
Weak Coupling Regime

Anomalies in Strongly Coupled Harmonic Quantum Brownian Motion

2013 ◽  
Vol 20 (01) ◽  
pp. 1350002 ◽  
Author(s):  
F. Giraldi ◽  
F. Petruccione
Keyword(s):  
Time Evolution ◽  
Power Law ◽  
Weak Coupling ◽  
Inverse Power ◽  
Strong Coupling Regime ◽  
Weak Coupling Regime ◽  
Spectral Densities ◽  
Inverse Power Law ◽  
Critical Configurations ◽  
Long Time

The exact dynamics of a quantum damped harmonic oscillator coupled to a reservoir of boson modes has been formally described in terms of the coupling function, both in weak and strong coupling regime. In this scenario, we provide a further description of the exact dynamics through integral transforms. We focus on a special class of spectral densities, sub-ohmic at low frequencies, and including integrable divergencies referred to as photonic band gaps. The Drude form of the spectral densities is recovered as upper limit. Starting from special distributions of coherent states as external reservoir, the exact time evolution, described through Fox H-functions, shows long time inverse power law decays, departing from the exponential-like relaxations obtained for the Drude model. Different from the weak coupling regime, in the sub-ohmic condition, undamped oscillations plus inverse power law relaxations appear in the long time evolution of the observables position and momentum. Under the same condition, the number of excitations shows trapping of the population of the excited levels and oscillations enveloped in inverse power law relaxations. Similarly to the weak coupling regime, critical configurations give arbitrarily slow relaxations useful for the control of the dynamics. If compared to the value obtained in weak coupling condition, for strong couplings the critical frequency is enhanced by a factor 4.

Finite-dimensional approximation of the scattering matrix

1986 ◽  
Vol 64 (5) ◽  
pp. 611-616 ◽  
Author(s):  
Helmut Kröger ◽  
Anais Smailagic ◽  
Ralph Girard
Keyword(s):  
Weak Coupling ◽  
Weak Coupling Regime ◽  
S Wave ◽  
Proton Proton ◽  
Time Evolution Operator ◽  
Finite Dimensional Approximation ◽  
Finite Dimensional ◽  
Dimensional Approximation ◽  
S Matrix ◽  
Computer Calculations

A finite-dimensional nonperturbative approximation scheme of the time-evolution operator and the S matrix for relativistic field theories is discussed. It is amenable to computer calculations. Parallels with lattice-field theory are drawn. The method is outlined for the ϕ4 theory. Equivalence to standard perturbation theory in the weak-coupling regime is obtained in the limit of the approximation parameters. The method is tested numerically for nonrelativistic proton–proton s-wave scattering and the the ϕ4 model in the weak-coupling regime in 1 + 1 dimensions. In both examples, convergence to the reference solution is found.

scholarly journals Controllable nonlinearity in a dual-coupling optomechanical system under a weak-coupling regime

2018 ◽  
Vol 97 (3) ◽  
Author(s):  
Gui-Lei Zhu ◽  
Xin-You Lü ◽  
Liang-Liang Wan ◽  
Tai-Shuang Yin ◽  
Qian Bin ◽  
...  
Keyword(s):  
Weak Coupling ◽  
Weak Coupling Regime ◽  
Optomechanical System

scholarly journals Thermalization of Finite Many-Body Systems by a Collision Model

Entropy ◽  
2019 ◽  
Vol 21 (12) ◽  
pp. 1182 ◽  
Author(s):  
Onat Arısoy ◽  
Steve Campbell ◽  
Özgür E. Müstecaplıoğlu
Keyword(s):  
Weak Coupling ◽  
Target System ◽  
Model Description ◽  
Body System ◽  
Weak Coupling Regime ◽  
Many Body ◽  
Collision Model ◽  
System Transition ◽  
Many Body Systems ◽  
Thermal States

We construct a collision model description of the thermalization of a finite many-body system by using careful derivation of the corresponding Lindblad-type master equation in the weak coupling regime. Using the example of a two-level target system, we show that collision model thermalization is crucially dependent on the various relevant system and bath timescales and on ensuring that the environment is composed of ancillae which are resonant with the system transition frequencies. Using this, we extend our analysis to show that our collision model can lead to thermalization for certain classes of many-body systems. We establish that for classically correlated systems our approach is effective, while we also highlight its shortcomings, in particular with regards to reaching entangled thermal states.

Deterministic controlled-phase gate and SWAP gate with dipole-induced transparency in the weak-coupling regime

2016 ◽  
Vol 379 ◽  
pp. 19-24 ◽  
Author(s):  
A-Peng Liu ◽  
Liu-Yong Cheng ◽  
Shou Zhang ◽  
Yu Zhao ◽  
Xiao-Zhen Gao ◽  
...  
Keyword(s):  
Weak Coupling ◽  
Weak Coupling Regime ◽  
Swap Gate ◽  
Phase Gate ◽  
Controlled Phase Gate ◽  
Induced Transparency
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