Current, quantum transport and entropic force of bosonic systems interacting with two thermal reservoirs

• URL: http://arxiv.org/abs/2403.12112v3
• Date: Fri, 03 Jan 2025 09:17:44 GMT
• Title: Current, quantum transport and entropic force of bosonic systems interacting with two thermal reservoirs
• Authors: Jayarshi Bhattacharya, Sunandan Gangopadhyay, Gautam Gangopadhyay,
• Abstract summary: We study the dynamics of current and quantum transport factor in a bosonic system. In particular, we observe that the transport factor of the quantum system is greater than the corresponding factor when the temperature goes to infinity.
• Score: 0.10713888959520207
• License:
• Abstract: This paper investigates the dynamics of current and quantum transport factor in a bosonic system consisting of a central system interacting with two reservoirs at different temperatures. We derive a master equation describing the time evolution of the density matrix of the system, accounting for the interactions and energy transfer between the components. We quantify the current, representing the flow of bosons through the system and analyse its dependence on the system's parameters and temperatures of the thermal reservoirs. In the steady state regime, we derived an expression for the quantum transport factor of the energy transfer process. Our analysis show that quantum effects, such as the dependence on temperature can significantly impact this factor. In particular, we observe that the transport factor of the quantum system is greater than the corresponding factor when the temperature goes to infinity, where the factor has an identical form with the Carnot efficiency of an ideal heat engine. We then derived the Fokker-Planck equation to find out the Glauber-Sudarsan $P$-representation. In the steady state of the equation, the probability distribution comes out to be in Gaussian form. We then calculated the entropic force for this probability distribution which gives the Hooke's law in the steady state, in agreement with the fact that our system is a harmonic oscillator.

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