How irreversibility arises in a universe with time-reversal symmetric laws is a central problem in physics. In this Letter, we discuss a radically different take on the emergence of irreversibility, adopting the recently proposed constructor theory framework. Irreversibility is expressed as the requirement that a task is possible, while its inverse is not. We prove the compatibility of such irreversibility with quantum theory's time-reversal symmetric laws, using a dynamical model based on the universal quantum homogenizer. We also test the physical realizability of this model by means of an experimental demonstration with high quality single-photon qubits.

Emergence of Constructor-Based Irreversibility in Quantum Systems: Theory and Experiment / Marletto, Chiara; Vedral, Vlatko; Knoll, Laura T; Piacentini, Fabrizio; Bernardi, Ettore; Rebufello, Enrico; Avella, Alessio; Gramegna, Marco; Degiovanni, Ivo Pietro; Genovese, Marco. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 128:8(2022), p. 080401. [10.1103/PhysRevLett.128.080401]

Emergence of Constructor-Based Irreversibility in Quantum Systems: Theory and Experiment

Knoll, Laura T;Piacentini, Fabrizio;Bernardi, Ettore;Rebufello, Enrico;Avella, Alessio;Gramegna, Marco;Degiovanni, Ivo Pietro;Genovese, Marco
2022

Abstract

How irreversibility arises in a universe with time-reversal symmetric laws is a central problem in physics. In this Letter, we discuss a radically different take on the emergence of irreversibility, adopting the recently proposed constructor theory framework. Irreversibility is expressed as the requirement that a task is possible, while its inverse is not. We prove the compatibility of such irreversibility with quantum theory's time-reversal symmetric laws, using a dynamical model based on the universal quantum homogenizer. We also test the physical realizability of this model by means of an experimental demonstration with high quality single-photon qubits.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/76171
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