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Coherent interaction of spins induced by thermal bosonic environment

Dmitry Solenov, Denis Tolkunov, Vladimir Privman A

arXiv:cond-mat/0511680Physics Letters AJun 13, 200613 citations

Coherent Interaction of Spins Induced by Thermal Bosonic Environment.

Denis Tolkunov, Dmitry Solenov, Vladimir Privman A

Bulletin of the American Physical SocietyMar 13, 20060 citations

A qubit strongly interacting with a bosonic environment: Geometry of thermal states

Patrick Orman, Ryoichi Kawai

A standard theory of thermodynamics states that a quantum system in contact with a thermal environment relaxes to the equilibrium state known as the Gibbs state wherein decoherence occurs in the system's energy eigenbasis. When the interaction between the system and environment is strong, a different equilibrium state can be reached that is not diagonal in the system energy eigenbasis. Zurek's theory of einselection predicts that the decoherence takes place in the so-called pointer basis under the strong coupling regime, which can be viewed as continuous measurement of the system by the environment. The thermal state under the strong coupling regime is thus expected to be diagonal in the pointer states rather than energy eigenstates. We have postulated that the thermals state in the strong coupling limit is a Gibbs state projected onto the pointer basis and have demonstrated this with a simple model of single qubit strongly interacting with a bosonic environment.A standard theory of thermodynamics states that a quantum system in contact with a thermal environment relaxes to the equilibrium state known as the Gibbs state wherein decoherence occurs in the system's energy eigenbasis. When the interaction between the system and environment is strong, a different equilibrium state can be reached that is not diagonal in the system energy eigenbasis. Zurek's theory of einselection predicts that the decoherence takes place in the so-called pointer basis under the strong coupling regime, which can be viewed as continuous measurement of the system by the environment. The thermal state under the strong coupling regime is thus expected to be diagonal in the pointer states rather than energy eigenstates. We have postulated that the thermals state in the strong coupling limit is a Gibbs state projected onto the pointer basis and have demonstrated this with a simple model of single qubit strongly interacting with a bosonic environment.

arXiv:2010.09201Oct 19, 20204 citations

Thermalization in Isolated Quantum Systems

Osamu Fukushima

Springer thesesJan 1, 20250 citations

Non-Markovian thermalization for a few qubit system

Pedro D. Manrique, Ferney J. Rodríguez

Bulletin of the American Physical SocietyMar 13, 20080 citations

Quantum dynamics, master equation and equilibrium for a qubit coupled to a thermal boson field

Hiromichi Nakazato, Saverio Pascazio

We analytically derive the exact—though formal—master equation for a two-level quantum system (qubit) interacting with a bosonic environment within the rotating-wave approximation. Assuming that the environment is initially in an arbitrary thermal state, the long-time behavior of the evolution operator governing the dynamics of both the system and the environment is analyzed, and the conditions under which the system approaches thermal equilibrium are examined.

Scientific ReportsMar 10, 20260 citations

Thermalization of a qubit strongly interacting with a bosonic environment

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