Discriminating quantum field theories in non-inertial frames

Quantum channel discrimination is used to test quantum field theory in non-inertial frames. We search for optimal strategies which can best see the thermality of the Unruh effect. We find that the usual strategy of counting particles in the vacuum can be improved, thereby enhancing the discriminatio...

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Bibliographic Details
Published inarXiv.org
Main Authors Doukas, Jason, Adesso, Gerardo, Pirandola, Stefano, Dragan, Andrzej
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 26.06.2015
Subjects
Confidence intervals
Discrimination
Field theory
Physics - General Relativity and Quantum Cosmology
Physics - Quantum Physics
Quantum field theory
Quantum theory
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Summary:Quantum channel discrimination is used to test quantum field theory in non-inertial frames. We search for optimal strategies which can best see the thermality of the Unruh effect. We find that the usual strategy of counting particles in the vacuum can be improved, thereby enhancing the discrimination. Coherent state probes, which are practical and feasible, give exponential improvement in the discrimination of the Unruh channel and come very close to optimal. In particular, we show that using a short pulse laser, the accelerations required to test the Unruh effect can be reduced by at least three orders of magnitude with the same statistical confidence as could be achieved in vacuum. These results are expected to be relevant to upcoming experimental tests of quantum field theory in curved spacetimes in analogue systems.
ISSN:2331-8422
DOI:10.48550/arxiv.1306.4474