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Title: Tightening Quantum Speed Limits for Almost All States
Authors: Campaioli, Francesco
Binder, Felix Christoph
Pollock, Felix A.
Modi, Kavan
Keywords: Quantum Communication
Quantum Control
Issue Date: 2018
Source: Campaioli, F., Pollock, F. A., Binder, F. C., & Modi, K. (2018). Tightening Quantum Speed Limits for Almost All States. Physical Review Letters, 120(6), 060409-.
Series/Report no.: Physical Review Letters
Abstract: Conventional quantum speed limits perform poorly for mixed quantum states: They are generally not tight and often significantly underestimate the fastest possible evolution speed. To remedy this, for unitary driving, we derive two quantum speed limits that outperform the traditional bounds for almost all quantum states. Moreover, our bounds are significantly simpler to compute as well as experimentally more accessible. Our bounds have a clear geometric interpretation; they arise from the evaluation of the angle between generalized Bloch vectors.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.120.060409
Rights: © 2018 American Physical Society (APS). This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society (APS). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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