Quantum correlations in time
- URL: http://arxiv.org/abs/2002.10448v2
- Date: Tue, 22 Dec 2020 16:50:18 GMT
- Title: Quantum correlations in time
- Authors: Tian Zhang, Oscar Dahlsten, and Vlatko Vedral
- Abstract summary: We investigate quantum correlations in time in different approaches.
With the exception of amplitude-weighted correlations in the path integral formalism, temporal correlations in the different approaches are the same or operationally equivalent.
- Score: 2.0373030742807545
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We investigate quantum correlations in time in different approaches. We
assume that temporal correlations should be treated in an even-handed manner
with spatial correlations. We compare the pseudo-density matrix formalism with
several other approaches: indefinite causal structures, consistent histories,
generalised quantum games, out-of-time-order correlations(OTOCs), and path
integrals. We establish close relationships among these space-time approaches
in non-relativistic quantum theory, resulting in a unified picture. With the
exception of amplitude-weighted correlations in the path integral formalism, in
a given experiment, temporal correlations in the different approaches are the
same or operationally equivalent.
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