Quantum Renyi relative entropies on a spin chain with interface defects

Abstract

We compute the quantum Renyi relative entropies in an infinite spinless fermionic chain with a defect. Doing a numerical analysis we will show that the resulting quantity depends non trivially on the effective central charge of the theory. Moreover, we will see that an explicit analytic expression can be written for all of them and from that, one can read the quantum fidelity and the relative entropy.

13 pages, 18 figures. References added

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• Relative entropy and the Bekenstein bound
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Cited by in corpus (3)

• Symmetry resolved relative entropies and distances in conformal field theory
• Time evolution of entanglement negativity across a defect
• Quantum hypothesis testing in many-body systems