|
related topics |
{time, decoherence, evolution} |
{classical, space, random} |
{energy, gaussian, time} |
{temperature, thermal, energy} |
{spin, pulse, spins} |
{state, algorithm, problem} |
{energy, state, states} |
{phase, path, phys} |
{force, casimir, field} |
{alice, bob, state} |
|
Deterministic constant-temperature dynamics for dissipative quantum
systems
Alessandro Sergi
abstract: A novel method is introduced in order to treat the dissipative dynamics of
quantum systems interacting with a bath of classical degrees of freedom. The
method is based upon an extension of the Nos\`e-Hoover chain (constant
temperature) dynamics to quantum-classical systems. Both adiabatic and
nonadiabatic numerical calculations on the relaxation dynamics of the
spin-boson model show that the quantum-classical Nos\`e-Hoover chain dynamics
represents the thermal noise of the bath in an accurate and simple way.
Numerical comparisons, both with the constant energy calculation and with the
quantum-classical Brownian motion treatment of the bath, show that the
quantum-classical Nos\`e-Hoover Chain dynamics can be used to introduce
dissipation in the evolution of a quantum subsystem even with just one degree
of freedom for the bath. The algorithm can be computationally advantageous in
modeling, within computer simulation, the dynamics of a quantum subsystem
interacting with complex molecular environments.
- oai_identifier:
- oai:arXiv.org:quant-ph/0701242
- categories:
- quant-ph
- comments:
- Revised version
- doi:
- 10.1088/1751-8113/40/17/F05
- arxiv_id:
- quant-ph/0701242
- created:
- 2007-01-31
- updated:
- 2007-03-08
Full article ▸
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