Tightening Quantum Speed Limits for Almost All States

Tightening Quantum Speed Limits for Almost All States

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 almos...

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Main Authors: Campaioli, Francesco, Binder, Felix Christoph, Pollock, Felix A., Modi, Kavan
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
Subjects:
Quantum Communication
Quantum Control
Online Access:https://hdl.handle.net/10356/88308
http://hdl.handle.net/10220/44588
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-883082023-02-28T19:23:54Z Tightening Quantum Speed Limits for Almost All States Campaioli, Francesco Binder, Felix Christoph Pollock, Felix A. Modi, Kavan School of Physical and Mathematical Sciences Quantum Communication Quantum Control 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. NRF (Natl Research Foundation, S’pore) Published version 2018-03-19T08:28:03Z 2019-12-06T17:00:24Z 2018-03-19T08:28:03Z 2019-12-06T17:00:24Z 2018 Journal Article 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-. 0031-9007 https://hdl.handle.net/10356/88308 http://hdl.handle.net/10220/44588 10.1103/PhysRevLett.120.060409 en Physical Review Letters © 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: [http://dx.doi.org/10.1103/PhysRevLett.120.060409]. 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. 5 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Quantum Communication
Quantum Control
spellingShingle Quantum Communication
Quantum Control
Campaioli, Francesco
Binder, Felix Christoph
Pollock, Felix A.
Modi, Kavan
Tightening Quantum Speed Limits for Almost All States
description 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.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Campaioli, Francesco
Binder, Felix Christoph
Pollock, Felix A.
Modi, Kavan
format Article
author Campaioli, Francesco
Binder, Felix Christoph
Pollock, Felix A.
Modi, Kavan
author_sort Campaioli, Francesco
title Tightening Quantum Speed Limits for Almost All States
title_short Tightening Quantum Speed Limits for Almost All States
title_full Tightening Quantum Speed Limits for Almost All States
title_fullStr Tightening Quantum Speed Limits for Almost All States
title_full_unstemmed Tightening Quantum Speed Limits for Almost All States
title_sort tightening quantum speed limits for almost all states
publishDate 2018
url https://hdl.handle.net/10356/88308
http://hdl.handle.net/10220/44588
_version_ 1759854630290849792

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