Related papers: Generalized squeezing as a witness

Generalized squeezing as a witness

URL: http://arxiv.org/abs/2503.09210v1
Date: Wed, 12 Mar 2025 09:58:59 GMT
Title: Generalized squeezing as a witness
Authors: Šimon Bräuer, Tomáš Opatrný, Petr Marek,
Abstract summary: Quantum systems can be prepared in an infinite continuum of states, but only some of them can be used as resources for quantum technologies.<n>We show that it can be performed by looking at the squeezing of the quantum states - a scenario in which the variance of some observable operator is suppressed below the threshold given by the non-useful states.
Score: 0.6554326244334868
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Quantum systems can be prepared in an infinite continuum of states, but only some of them can be used as resources for quantum technologies. Discerning whether a specific quantum state falls into this class, is often a challenging task. We show that it can be performed by looking at the squeezing of the quantum states - a scenario in which the variance of some observable operator is suppressed below the threshold given by the non-useful states. We discuss the general concept first; then we illustrate the approach by evaluating cubic nonlinear squeezing in the system of collective atomic spins.

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