Information-driven current in a quantum Maxwell demon

摘要

We describe a minimal model of a quantum Maxwell demon obeying Hamiltonian dynamics. The model isnsolved exactly, and we analyze its steady-state behavior. We find that writing information to a quantum memoryninduces a probability current through the demon, which is the quantum analog of the classical Maxwell demon’snaction. Our model offers a simple and pedagogical paradigm for investigating the thermodynamics of quantumninformation processing.