Diverging quantum speed limits: a herald of classicality
| dc.contributor.author | Poggi, Pablo M. | |
| dc.contributor.author | Campbell, Steve | |
| dc.contributor.author | Deffner, Sebastian | |
| dc.date.accessioned | 2021-08-05T15:24:18Z | |
| dc.date.available | 2021-08-05T15:24:18Z | |
| dc.date.issued | 2021-12-09 | |
| dc.description.abstract | When is the quantum speed limit (QSL) really quantum? Typically, a vanishing QSL time is an indicator of an emergent classicality. However, it is still not entirely understood what precise aspects of classicality lead to diverging quantum speeds. Here, we show that vanishing QSL times (or, equivalently, diverging quantum speeds) can be traced back to reduced uncertainty in quantum observables. We illustrate this mechanism by developing a QSL formalism for continuous variable quantum systems undergoing general Gaussian dynamics. For these systems, we show that three typical scenarios leading to vanishing QSL times, namely large squeezing, small effective Planck's constant, and large particle number, can be fundamentally connected to each other. Finally, by studying the dynamics of open quantum systems and mixed states, we show that the addition of classical noise typically increases the QSL time. | en_US |
| dc.description.sponsorship | This material is based upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Systems Accelerator. S.C. gratefully acknowledges the Science Foundation Ireland Starting Investigator Research Grant “SpeedDemon” (No. 18/SIRG/5508) for financial support. S.D. acknowledges support from the U.S. National Science Foundation under Grant No. DMR2010127. | en_US |
| dc.description.uri | https://journals.aps.org/prxquantum/abstract/10.1103/PRXQuantum.2.040349 | en_US |
| dc.format.extent | 11 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2xtb1-ycpc | |
| dc.identifier.citation | Poggi, Pablo M., Steve Campbell, and Sebastian Deffner. "Diverging Quantum Speed Limits: A Herald of Classicality." PRX Quantum 2, 040349 (9 December 2021). https://doi.org/10.1103/PRXQuantum.2.040349 | |
| dc.identifier.uri | http://hdl.handle.net/11603/22309 | |
| dc.identifier.uri | https://doi.org/10.1103/PRXQuantum.2.040349 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | APS | |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | en_US |
| dc.rights | Attribution 4.0 International (CC BY 4.0) | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
| dc.title | Diverging quantum speed limits: a herald of classicality | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0003-0504-6932 | en_US |