Entanglement detection by Bragg scattering
Chiara Macchiavello, Giovanna Morigi
TL;DR
This paper proposes a method to detect entanglement in spin chains by using photon Bragg scattering, enabling measurement of structural witnesses and two-point correlations in experimental setups like ion traps and optical lattices.
Contribution
It introduces a practical approach to measure entanglement witnesses and correlations via photon scattering in existing quantum simulation platforms.
Findings
Method enables entanglement detection through photon scattering.
Allows measurement of two-point correlation functions.
Applicable to ion chains and atomic arrays.
Abstract
We show how to measure the structural witnesses proposed in [P. Krammer et al., Phys. Rev. Lett. 103, 100502 (2009)] for detecting entanglement in a spin chain using photon scattering. The procedure, moreover, allows one to measure the two-point correlation function of the spin array. This proposal could be performed in existing experimental platforms realizing ion chains in Paul traps or atomic arrays in optical lattices.
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