936 lines
78 KiB
Text
936 lines
78 KiB
Text
<!DOCTYPE html>
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<html lang="en" dir="ltr" prefix="content: http://purl.org/rss/1.0/modules/content/ dc: http://purl.org/dc/terms/ foaf: http://xmlns.com/foaf/0.1/ og: http://ogp.me/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# schema: http://schema.org/ sioc: http://rdfs.org/sioc/ns# sioct: http://rdfs.org/sioc/types# skos: http://www.w3.org/2004/02/skos/core# xsd: http://www.w3.org/2001/XMLSchema# ">
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<h1 class="nist-page__title">Robustness of the projected squeezed state protocol</h1>
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<div class="nist-field__item"><time datetime="2024-05-08T12:00:00Z">May 8, 2024</time>
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<div class="nist-field__item">Byron Alexander, <span class="nist-author">John J. Bollinger</span>, Mark Tame</div>
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<h3>Abstract</h3>
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Projected squeezed (PS) states are multipartite entangled states generated by unitary spin squeezing, followed by a quantum measurement and post-selection. They lead to an appreciable decrease in the state preparation time of the maximally entangled N-qubit Greenberger–Horne–Zeilinger (GHZ) state when compared to deterministic preparation by unitary transformations in physical systems where spin squeezing can be realized, such as ion, neutral atom, and superconducting qubits. Here we simulate the generation of PS states in non-ideal experimental conditions with relevant decoherence channels. By employing the Kraus operator method, and quantum trajectory method to reduce the computational complexity, we assess the quantum Fisher information and overlap fidelity with an ideal GHZ state. Our findings highlight PS states as useful metrological resources, demonstrating their increasing robustness against environmental effects with an increasing number of qubits.
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<div class="nist-field__item">Physical Review A</div>
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<div class="nist-field__item"><a href="https://doi.org/10.1103/PhysRevA.109.052614" target="_blank">https://doi.org/10.1103/PhysRevA.109.052614</a></div>
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<div class="nist-field__item">GHZ state, measurement-based state preparation, one-axis twisting, quantum metrology, spin squeezing</div>
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Alexander, B.
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, Bollinger, J.
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and Tame, M.
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(2024),
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Robustness of the projected squeezed state protocol, Physical Review A, [online], https://doi.org/10.1103/PhysRevA.109.052614, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956473
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Created May 8, 2024, Updated June 7, 2024
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