Metrological advantage at finite temperature for Gaussian phase estimation
| Autor: | Pérola Milman, Louis Garbe, Simone Felicetti, Thomas Coudreau, Arne Keller |
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| Přispěvatelé: | Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Photophysique Moléculaire (PPM), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Kastler Brossel (LKB (Jussieu)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Coudreau, Thomas |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Work (thermodynamics)
Gaussian Phase (waves) FOS: Physical sciences Context (language use) 01 natural sciences Displacement (vector) 010305 fluids & plasmas symbols.namesake [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] 0103 physical sciences physics of lasers Statistical physics 010306 general physics [PHYS.QPHY] Physics [physics]/Quantum Physics [quant-ph] Physics Quantum optics Quantum Physics nonlinear optics classical optics [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] Quadrature (mathematics) Metrology symbols Quantum Physics (quant-ph) |
| Zdroj: | Physical Review A Physical Review A, American Physical Society, 2019, 99 (4), pp.043815. ⟨10.1103/PhysRevA.99.043815⟩ Phys.Rev.A Phys.Rev.A, 2019, 99 (4), pp.043815. ⟨10.1103/PhysRevA.99.043815⟩ |
| ISSN: | 1050-2947 1094-1622 |
| Popis: | In the context of phase estimation with Gaussian states, we introduce a quantifiable definition of metrological advantage that takes into account thermal noise in the preparation procedure. For a broad set of states, \textit{isotropic non-pure Gaussian states}, we show that squeezing is not only necessary, but sufficient, to achieve metrological advantage. We interpret our results in the framework of resource theory, and discuss possible sources of advantage other than squeezing. Our work is a step towards using phase estimation with pure and mixed state to define and quantify nonclassicality. This work is complementary with studies that defines nonclassicality using quadrature displacement estimation. Changes to wording, figures replaced |
| Databáze: | OpenAIRE |
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