Non-Markovian Dynamics of Macroscopic Quantum Systems in Interaction with Non-equilibrium Environments
| Autor: | Afshin Shafiee, Nasim Shahmansoori, Farhad Taher Ghahramani |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Superconductivity Quantum Physics Dynamics (mechanics) FOS: Physical sciences Markov process Statistical and Nonlinear Physics Interference (wave propagation) Decoherence time 01 natural sciences 010305 fluids & plasmas symbols.namesake Qubit 0103 physical sciences symbols Statistical physics Perturbation theory Quantum Physics (quant-ph) 010306 general physics Quantum Mathematical Physics |
| Zdroj: | Journal of Statistical Physics. 176:541-555 |
| ISSN: | 1572-9613 0022-4715 |
| DOI: | 10.1007/s10955-019-02308-1 |
| Popis: | We study the dynamics of a macroscopic superconducting qubit coupled to two independent non-stationary reservoirs by using time-dependent perturbation theory. We show that an equilibrium environment surpasses the coherent evolution of the macroscopic qubit completely. When the qubit couples to two different reservoirs, exemplifying a non-equilibrium environment, the short-time dynamics is affected by the interference between two reservoirs, implying the non-additivity of effects of two reservoirs. The non-additivity can be traced back to a non-Markovian effect, even though two reservoirs are independently assumed to be Markovian. Explicitly, the non-equilibrium environment intensifies both coherent and incoherent parts of the evolution. Therefore, the macroscopic qubit would evolve more coherently but at the price of a shorter decoherence time. 11 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |