Quantum Brownian motion for periodic coupling to an Ohmic bath

Details Quantum Brownian motion for periodic coupling to an Ohmic bath Quantum Brownian motion for periodic coupling to an Ohmic bath

2006-11-28

arxiv.org/abs/quant-ph/0611274v2

Phys. Rev. A 75, 032105 (2007)

Physics

Quantum Physics

7 pages, 3 figures. V2: Minor modifications according to the referee's suggestions and title modified

Scientific paper

10.1103/PhysRevA.75.032105

We show theoretically how the periodic coupling between an engineered reservoir and a quantum Brownian particle leads to the formation of a dynamical steady state which is characterized by an effective temperature above the temperature of the environment. The average steady state energy of the system has a higher value than expected from the environmental properties. The system experiences repeatedly a non-Markovian behavior -- as a consequence the corresponding effective decay for long evolution times is always on average stronger than the Markovian one. We also highlight the consequences of the scheme to the Zeno--anti-Zeno crossover which depends, in addition to the periodicity $\tau$, also on the total evolution time of the system.

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