Large Quantum Delocalization of a Levitated Nanoparticle using Optimal Control: Applications for Force Sensing and Entangling via Weak Forces

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dc.contributor.author Weiss, T.
dc.contributor.author Roda-Llordes, M.
dc.contributor.author Torrontegui Muñoz, Erik
dc.contributor.author Aspelmeyer, M.
dc.contributor.author Romero-Isart, O.
dc.date.accessioned 2021-07-20T09:27:16Z
dc.date.available 2021-07-20T09:27:16Z
dc.date.issued 2021-07-09
dc.identifier.bibliographicCitation Weiss, T., Roda-Llordes, M., Torrontegui, E., Aspelmeyer, M. & Romero-Isart, O. (2021). Large Quantum Delocalization of a Levitated Nanoparticle Using Optimal Control: Applications for Force Sensing and Entangling via Weak Forces. Physical Review Letters, 127(2), 023601.
dc.identifier.issn 0031-9007
dc.identifier.uri http://hdl.handle.net/10016/33113
dc.description.abstract We propose to optimally control the harmonic potential of a levitated nanoparticle to quantum delocalize its center-of-mass motional state to a length scale orders of magnitude larger than the quantum zero-point motion. Using a bang-bang control of the harmonic potential, including the possibility of inverting it, the initial ground-state-cooled levitated nanoparticle coherently expands to large scales and then contracts to the initial state in a time-optimal way. We show that this fast loop protocol can be used to enhance force sensing as well as to dramatically boost the entangling rate of two weakly interacting nanoparticles. We parameterize the performance of the protocol, and therefore the macroscopic quantum regime that could be explored, as a function of displacement and frequency noise in the nanoparticle’s center-of-mass motion. This noise analysis accounts for the sources of decoherence relevant to current experiments.
dc.description.sponsorship We thank P. Feldmann, D. Giannandrea, C. GonzalezBallestero, N. Kiesel, and A. Serafini for helpful discussions. ORI and MA thank the hospitality of the Perimeter Institute in 2017, where we had the first discussions about this project. TW acknowledges financial support from the Alexander von Humboldt foundation. ET acknowledges financial support from Project PGC2018-094792-B-I00 (MCIU/AEI/FEDER,UE), CSIC Research Platform PTI-001, and CAM/FEDER Project No. S2018/TCS-4342 (QUITEMAD-CM).
dc.format.extent 6
dc.language.iso eng
dc.publisher American Physical Society
dc.rights © 2021 American Physical Society
dc.subject.other Entanglement production
dc.subject.other Optomechanics
dc.subject.other Quantum control
dc.subject.other Quantum foundations
dc.subject.other Quantum metrology
dc.subject.other Quantum-to-classical transition
dc.subject.other Nanoparticles
dc.title Large Quantum Delocalization of a Levitated Nanoparticle using Optimal Control: Applications for Force Sensing and Entangling via Weak Forces
dc.type article
dc.subject.eciencia Física
dc.identifier.doi https://doi.org/10.1103/PhysRevLett.127.023601
dc.rights.accessRights openAccess
dc.relation.projectID Comunidad de Madrid. S2018/TCS-4342
dc.relation.projectID Gobierno de España. PGC2018-094792-B-I00
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 023601
dc.identifier.publicationissue 2
dc.identifier.publicationtitle Physical Review Letters
dc.identifier.publicationvolume 127
dc.identifier.uxxi AR/0000026542
dc.contributor.funder Comunidad de Madrid
dc.contributor.funder Ministerio de Ciencia e Innovación (España)
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