Numerically exact open quantum system work statistics with process tensors

• URL: http://arxiv.org/abs/2512.16823v1
• Date: Thu, 18 Dec 2025 18:04:18 GMT
• Title: Numerically exact open quantum system work statistics with process tensors
• Authors: Mike Shubrook, Moritz Cygorek, Erik Gauger, Jake Iles-Smith, Ahsan Nazir,
• Abstract summary: We introduce a process tensor framework that enables the computation of the full numerically exact quantum work statistics of driven open quantum systems.<n>We demonstrate the utility of our approach by applying it to a Landauer erasure protocol operating beyond the weak-coupling, Markovian, and slow-driving limits.<n>Our framework delivers non-perturbative accuracy and detail in characterising energy-exchange fluctuations in driven open quantum systems.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Accurately quantifying the thermodynamic work costs of quantum operations is essential for the continued development and optimisation of emerging quantum technologies. This present a significant challenge in regimes of rapid control within complex, non-equilibrium environments - conditions under which many contemporary quantum devices operate and conventional approximations break down. Here, we introduce a process tensor framework that enables the computation of the full numerically exact quantum work statistics of driven open quantum systems. We demonstrate the utility of our approach by applying it to a Landauer erasure protocol operating beyond the weak-coupling, Markovian, and slow-driving limits. The resulting work probability distributions reveal distinct quantum signatures that are missed by low-order moments yet significantly impact the erasure fidelity of the protocol. Our framework delivers non-perturbative accuracy and detail in characterising energy-exchange fluctuations in driven open quantum systems, establishing a powerful and versatile tool for exploring thermodynamics and control in the operating regimes of both near-term and future quantum devices.

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