Proposed method for direct measurement of non-Markovian character of the qubits coupled to bosonic reservoirs

Details Proposed method for direct measurement of non-Markovian character of the qubits coupled to bosonic reservoirs Proposed method for direct measurement of non-Markovian character of the qubits coupled to bosonic reservoirs

2009-12-15

arxiv.org/abs/0912.2879v4

Phys. Rev. A 81, 044105 (2010)

Physics

Quantum Physics

5 pages, 2 figures; revised version accepted for publication in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.81.044105

The non-Markovianity is a recently proposed characterization of the non-Markovian behavior in an open quantum system, based on which we first present a practical idea for directly measuring the non-Markovian character of a single qubit coupled to a zero-temperature bosonic reservoir, and then extend to investigate the dynamics of two noninteracting qubits subject to two reservoirs respectively with a lower bound of non-Markovianity. Our scheme, with no need of optimization procedures and quantum state tomography, is helpful for experimental implementation.

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