Powering a quantum clock with a non-equilibrium steady state

• URL: http://arxiv.org/abs/2412.13107v1
• Date: Tue, 17 Dec 2024 17:25:11 GMT
• Title: Powering a quantum clock with a non-equilibrium steady state
• Authors: Daniele Nello, Alessandro Silva,
• Abstract summary: We propose powering a quantum clock with the non-thermal resources offered by the stationary state of an integrable quantum spin chain. Using experimentally relevant examples of quantum spin chains, we suggest crossing a phase transition point is crucial for optimal performance.
• Score: 50.24983453990065
• License:
• Abstract: We propose powering a quantum clock with the non-thermal resources offered by the stationary state of an integrable quantum spin chain, driven out of equilibrium by a quench in a parameter of our choice. Analyzing the bias conditions of the clock, we establish a direct connection with the negativity of the steady-state response function. Using experimentally relevant examples of quantum spin chains, we suggest crossing a phase transition point is crucial for optimal performance. The coupling takes place through a global observable and, even in this case, the battery lifespan is found to be extensive in its size.

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