Quantum Entangled-Probe Scattering Theory

We develop an entangled-probe scattering theory, including quantum detection, that extends the scope of standard scattering approaches. We argue that these probes may be revolutionary in studying entangled matter such as unconventional phases of strongly correlated systems. Our presentation focuses...

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Bibliographic Details
Published in:arXiv.org 2021-07
Main Authors: Abu Ashik Md Irfan, Blackstone, Patrick, Pynn, Roger, Ortiz, Gerardo
Format: Article
Language:English
Subjects:
Correlation
Neutron beams
Quantum entanglement
Scattering
Online Access:Get full text
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Summary:We develop an entangled-probe scattering theory, including quantum detection, that extends the scope of standard scattering approaches. We argue that these probes may be revolutionary in studying entangled matter such as unconventional phases of strongly correlated systems. Our presentation focuses on a neutron beam probe that is mode-entangled in spin and path as is experimentally realized in [1], although similar ideas also apply to photon probes. We generalize the traditional van Hove theory [2] whereby the response is written as a properly-crafted combination of two-point correlation functions. Tuning the probe's entanglement length allows us to interrogate spatial scales of interest by analyzing interference patterns in the differential cross-section. Remarkably, for a spin dimer target we find that the typical Young-like interference pattern observed if the target state is un-entangled gets quantum erased when that state becomes maximally entangled.
ISSN:2331-8422
DOI:10.48550/arxiv.2008.04328