Thermal devices powered by generalized measurements with indefinite causal order

• URL: http://arxiv.org/abs/2205.14406v1
• Date: Sat, 28 May 2022 11:45:22 GMT
• Title: Thermal devices powered by generalized measurements with indefinite causal order
• Authors: Pedro R. Dieguez, Vinicius F. Lisboa, Roberto M. Serra
• Abstract summary: An indefinite causal order can be explored to produce nontrivial effects in quantum thermal devices. By employing a quantum switch of two measurement channels, we explore a thermal device fueled by an indefinite causal order.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A quantum-controlled device may produce a scenario in which two general quantum operations can be performed in a such way that it is not possible to associate a definite order for the operations application. Such an indefinite causal order can be explored to produce nontrivial effects in quantum thermal devices. We investigate a measurement-powered thermal device that consists of generalized measurement channels with adjustable intensity parameters, where energy is exchanged with the apparatus in the form of work or heat. The measurement-based device can operate as a heat engine, a thermal accelerator, or a refrigerator, according to a measurement intensity setting. By employing a quantum switch of two measurement channels, we explore a thermal device fueled by an indefinite causal order. We also discuss how a coherent control over an indefinite causal order structure can change the operating regimes of the measurement-powered thermal device to produce an advantage when compared to a scenario with an incoherent control of the order switch.

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