Decoherence-Free Rotational Degrees of Freedom for Quantum Applications

We employ spherical \(t\)-designs for the systematic construction of solids whose rotational degrees of freedom can be made robust to decoherence due to external fluctuating fields while simultaneously retaining their sensitivity to signals of interest. Specifically, the ratio of signal phase accumu...

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Bibliographic Details
Published inarXiv.org
Main Authors Pedernales, Julen S, Cosco, Francesco, Plenio, Martin B
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 03.01.2020
Subjects
Degrees of freedom
Entanglement
Physics - Quantum Physics
Robustness
Variation
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Summary:We employ spherical \(t\)-designs for the systematic construction of solids whose rotational degrees of freedom can be made robust to decoherence due to external fluctuating fields while simultaneously retaining their sensitivity to signals of interest. Specifically, the ratio of signal phase accumulation rate from a nearby source to the decoherence rate caused by fluctuating fields from more distant sources can be incremented to any desired level by using increasingly complex shapes. This allows for the generation of long-lived macroscopic quantum superpositions of rotational degrees of freedom and the robust generation of entanglement between two or more such solids with applications in robust quantum sensing and precision metrology as well as quantum registers.
ISSN:2331-8422
DOI:10.48550/arxiv.2001.00826