Non-Markovian dynamics of a qubit

Sabrina Maniscalco, Francesco Petruccione

Research output: Contribution to journalArticle

141 Citations (Scopus)
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Abstract

In this paper we investigate the non-Markovian dynamics of a qubit by comparing two generalized master equations with memory. In the case of a thermal bath, we derive the solution of the recently proposed post-Markovian master equation [ A. Shabani and D. A. Lidar Phys. Rev. A 71 020101 (2005)] and we study the dynamics for an exponentially decaying memory kernel. We compare the solution of the post-Markovian master equation with the solution of the typical memory kernel master equation. Our results lead to a new physical interpretation of the reservoir correlation function and bring to light the limits of usability of master equations with memory for the system under consideration.
Original languageEnglish
Article number012111
Number of pages8
JournalPhysical Review A
Volume73
Issue number1
DOIs
Publication statusPublished - 26 Jan 2006

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