Holevo's bound from a general quantum fluctuation theorem
| dc.contributor.author | Kafri, Dvir | |
| dc.contributor.author | Deffner, Sebastian | |
| dc.date.accessioned | 2020-08-11T18:04:37Z | |
| dc.date.available | 2020-08-11T18:04:37Z | |
| dc.date.issued | 2012-10-22 | |
| dc.description.abstract | We give a derivation of Holevo's bound using an important result from nonequilibrium statistical physics, the fluctuation theorem. To do so we develop a general formalism of quantum fluctuation theorems for two-time measurements, which explicitly accounts for the back action of quantum measurements as well as possibly nonunitary time evolution. For a specific choice of observables this fluctuation theorem yields a measurement-dependent correction to the Holevo bound, leading to a tighter inequality. We conclude by analyzing equality conditions for the improved bound. | en_US |
| dc.description.sponsorship | The authors thank Jacob Taylor and Eric Lutz for interesting discussions. SD acknowledges financial support by a fellowship within the postdoc-program of the German Academic Exchange Service (DAAD, contract No D/11/40955). DK acknowledges financial support by a fellowship from the Joint Quantum Institute. | en_US |
| dc.description.uri | https://journals.aps.org/pra/abstract/10.1103/PhysRevA.86.044302 | en_US |
| dc.format.extent | 5 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2lnaq-er49 | |
| dc.identifier.citation | Dvir Kafri and Sebastian Deffner, Holevo's bound from a general quantum fluctuation theorem, Phys. Rev. A 86(04) (2012), DOI:https://doi.org/10.1103/PhysRevA.86.044302 | en_US |
| dc.identifier.uri | https://doi.org/10.1103/PhysRevA.86.044302 | |
| dc.identifier.uri | http://hdl.handle.net/11603/19398 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | American Physical Society (APS) | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Joint Center for Earth Systems Technology (JCET) | |
| 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. | |
| dc.rights | ©2012 American Physical Society | |
| dc.title | Holevo's bound from a general quantum fluctuation theorem | en_US |
| dc.type | Text | en_US |