Abstract
This paper provides a holographic approach to compute some most-frequently used quantum distances and quasi-distances in strongly coupling systems and conformal field theories. By choosing modular ground state as the reference state, it finds that the trace distance, Fubini-Study distance, Bures distance and Rényi relative entropy, all have gravity duals. Their gravity duals have two equivalent descriptions: one is given by the integration of the area of a cosmic brane, the other one is given by the Euclidian on-shell action of dual theory and the area of the cosmic brane. It then applies these duals into the 2-dimensional conformal field theory as examples and finds the results match with the computations of field theory exactly.
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Yang, RQ. Gravity duals of quantum distances. J. High Energ. Phys. 2021, 156 (2021). https://doi.org/10.1007/JHEP08(2021)156
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DOI: https://doi.org/10.1007/JHEP08(2021)156