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Title: Rapid quantum squeezing by jumping the harmonic oscillator frequency
Authors: Xin, Mingjie
Leong, Wui Seng
Chen, Zilong
Wang, Yu
Lan, Shau-Yu
Keywords: Science::Physics
Issue Date: 2021
Source: Xin, M., Leong, W. S., Chen, Z., Wang, Y. & Lan, S. (2021). Rapid quantum squeezing by jumping the harmonic oscillator frequency. Physical Review Letters, 127(18), 183602-.
Project: QEP-P4
Journal: Physical Review Letters
Abstract: Quantum sensing and quantum information processing use quantum advantages such as squeezed states that encode a quantity of interest with higher precision and generate quantum correlations to outperform classical methods. In harmonic oscillators, the rate of generating squeezing is set by a quantum speed limit. Therefore, the degree to which a quantum advantage can be used in practice is limited by the time needed to create the state relative to the rate of unavoidable decoherence. Alternatively, a sudden change of harmonic oscillator's frequency projects a ground state into a squeezed state which can circumvent the time constraint. Here, we create squeezed states of atomic motion by sudden changes of the harmonic oscillation frequency of atoms in an optical lattice. Building on this protocol, we demonstrate rapid quantum amplification of a displacement operator that could be used for detecting motion. Our results can speed up quantum gates and enable quantum sensing and quantum information processing in noisy environments.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.127.183602
Rights: © 2021 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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