Temporal witnesses of non-classicality and conservation laws
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arXiv
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| Format: | Preprint |
| Published: |
2022
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| _version_ | 1866913354725982208 |
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| author | Di Pietra, Giuseppe Marletto, Chiara |
| author_facet | Di Pietra, Giuseppe Marletto, Chiara |
| contents | A general entanglement-based witness of non-classicality has recently been proposed, which can be applied to testing quantum effects in gravity. This witness is based on generating entanglement between two quantum probes via a mediator. In this paper we provide a "temporal" variant of this witness, using a single quantum probe to assess the non-classicality of the mediator. Within the formalism of quantum theory, we show that if a system $M$ is capable of inducing a coherent dynamical evolution of a quantum system $Q$, in the presence of a conservation law, then $M$ must be non-classical. This argument supports witnesses of non-classicality relying on a single quantum probe, which can be applied to a number of open issues, notably in quantum gravity or quantum biology. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2205_00198 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Temporal witnesses of non-classicality and conservation laws Di Pietra, Giuseppe Marletto, Chiara Quantum Physics A general entanglement-based witness of non-classicality has recently been proposed, which can be applied to testing quantum effects in gravity. This witness is based on generating entanglement between two quantum probes via a mediator. In this paper we provide a "temporal" variant of this witness, using a single quantum probe to assess the non-classicality of the mediator. Within the formalism of quantum theory, we show that if a system $M$ is capable of inducing a coherent dynamical evolution of a quantum system $Q$, in the presence of a conservation law, then $M$ must be non-classical. This argument supports witnesses of non-classicality relying on a single quantum probe, which can be applied to a number of open issues, notably in quantum gravity or quantum biology. |
| title | Temporal witnesses of non-classicality and conservation laws |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2205.00198 |