Quantum measurement engines and their relevance for quantum interpretations

Abstract

This article presents recent progress in the theory of quantum measurement engines and discusses the implications of them for quantum interpretations and philosophical implications of the theory. Several new measurement engine designs are introduced and analyzed: We discuss a feedback based atom-and-piston engine that sharply associates all work with successful events and all quantum heat with the failed events, as well as an unconditional but coherent qubit engine that can attain perfect efficiency. Any quantum measurement of an observable that does not commute with the Hamiltonian will necessarily change the energy of the system. We discuss different ways to extract that energy, the efficiency and work production of that process.

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• Complexity of spin configurations dynamics due to unitary evolution and periodic projective measurements
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• Making the Virtual Real: Measurement-Powered Tunneling Engines
• A perspective on Lindblad's Non-Equilibrium Entropy
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• Finite-time thermal refrigerator in interacting Bose-Einstein Condensates
• Weak continuous measurements require more work than strong ones
• Characterising quantum measurement through environmental stochastic entropy production in a two spin 1/2 system
• Correlations in a quantum switch-based heat engine with measurements: A proof-of-principle demonstration