Thermalization of finite many-body systems by a collision model

Abstract

We construct a collision model description of the thermalization of a finite many-body system by using careful derivation of the corresponding Lindblad-type master equation in the weak coupling regime. Using the example of two level target system, we show that collision model thermalization is crucially dependent on the various relevant system and bath timescales and on ensuring that the environment is composed of ancillae which are resonant with the system transition frequencies. Using this we extend our analysis to show that our collision model can lead to thermalisation for certain classes of many-body systems. We establish that for classically correlated systems our approach is effective, while we also highlight its shortcomings, in particular with regards to reaching entangled thermal states.

References in corpus (6)

• Thermodynamical Control by Frequent Quantum Measurements
• Collision-model-based approach to non-Markovian quantum dynamics
• Composite quantum collision models
• Simulation of indivisible qubit channels in collision models
• Implications of non-Markovian dynamics for the Landauer bound
• Generalized master equations leading to completely positive dynamics

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• Toward Quantum Analog Simulation of Many-Body Supersymmetry with Rydberg Atom Arrays
• Environment-assisted modulation of heat flux in a bio-inspired system based on collision model