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Quantum reversal: a general theory of coherent quantum absorbers

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arxiv 2402.02502 v3 pith:OIRSW6PF submitted 2024-02-04 quant-ph math-phmath.MP

classification quant-phmath-phmath.MP
keywords quantumsystemcoherentreversalabsorbersconceptconditionstheory
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The fascinating concept of coherent quantum absorber - which can absorb any photon emitted by another system while maintaining entanglement with that system - has found diverse implications in open quantum system theory and quantum metrology. This work generalizes the concept by proposing the so-called reversal conditions for the two systems, in which a "reverser" coherently reverses any effect of the other system on a field. The reversal conditions are rigorously boiled down to concise formulas involving the Petz recovery map and Kraus operators, thereby generalizing as well as streamlining the existing treatments of coherent absorbers.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Timescales, Squeezing and Heisenberg Scalings in Many-Body Continuous Sensing

    quant-ph 2025-05 accept novelty 7.0 of 10

    The optimized finite-time environmental quantum Fisher information provides an unambiguous Heisenberg-scaling metric, and two dissipative spin sensors achieve N² scaling, with direct photodetection sufficient in one case.

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