期刊
PHYSICAL REVIEW A
卷 94, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.94.012110
关键词
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资金
- EPSRC program TOPNES [EP/I031014/1]
- EPSRC [EP/M010910/1, EP/G03673X/1]
- Leverhulme Trust [IAF-2014-025, RPG-080]
- EPSRC program Hybrid Polaritonics [EP/M025330/1]
- EPSRC/NSF [EP/I035536, DMR-1107606]
- Engineering and Physical Sciences Research Council [EP/M010910/1, EP/I031014/1, EP/M025330/1, 1387032] Funding Source: researchfish
- EPSRC [EP/I031014/1, EP/M010910/1, EP/M025330/1] Funding Source: UKRI
Finding efficient descriptions of how an environment affects a collection of discrete quantum systems would lead to new insights into many areas of modern physics. Markovian, or time-local, methods work well for individual systems, but for groups a question arises: Does system-bath or intersystem coupling dominate the dissipative dynamics? The answer has profound consequences for the long-time quantum correlations within the system. We consider two bosonic modes coupled to a bath. By comparing an exact solution against different Markovian master equations, we find that a smooth crossover of the equations of motion between dominant intersystem and system-bath coupling exists-but it requires a nonsecular master equation. We predict singular behavior of the dynamics and show that the ultimate failure of nonsecular equations of motion is essentially a failure of the Markov approximation. Our findings support the use of time-local theories throughout the crossover between system-bath-dominated and intersystem-coupling-dominated dynamics.
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