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Updated: Nov 27, 2025

Measurement of the Directional Information Flow in fNIRS-Hyperscanning Data using the Partial Wavelet Transform Coherence Method
Published on: September 3, 2021
Non-Monogamy of Spatio-Temporal Correlations and the Black Hole Information Loss Paradox
Chiara Marletto1,2,3, Vlatko Vedral1,2,3, Salvatore Virzì4,5
1Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK.
Abstract:
Pseudo-density matrices are a generalisation of quantum states and do not obey monogamy of quantum correlations. Could this be the solution to the paradox of information loss during the evaporation of a black hole? In this paper we discuss this possibility, providing a theoretical proposal to extend quantum theory with these pseudo-states to describe the statistics arising in black-hole evaporation. We also provide an experimental demonstration of this theoretical proposal, using a simulation in optical regime, that tomographically reproduces the correlations of the pseudo-density matrix describing this physical phenomenon.
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