Purifying teleportation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00577671" target="_blank" >RIV/68378271:_____/23:00577671 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0346801" target="_blank" >https://hdl.handle.net/11104/0346801</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22331/q-2023-02-16-923" target="_blank" >10.22331/q-2023-02-16-923</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Purifying teleportation

Popis výsledku v původním jazyce

Coupling to the environment typically suppresses quantum properties of physical systems via decoherence. This is one of the main obstacles in practical implementations of quantum protocols. We show how decoherence can be reversed/suppressed during quantum teleportation in a network scenario. Treating the environment quantumly, we show that under a general pure dephasing coupling, performing a second teleportation can probabilistically reverse the decoherence effects if certain commutativity conditions hold. This effect is purely quantum and most pronounced for qubit systems, where in 25% of instances the decoherence can be reversed completely. We show the effect in a physical model of a qubit register coupled to a bosonic bath. We also analyze general d-dimensional systems, identifying all instances of decoherence suppression. Our results are proof-of-concept but will be relevant for the emerging field of quantum networks as teleportation is the key building block of network protocols.n

Název v anglickém jazyce

Purifying teleportation

Popis výsledku anglicky

Coupling to the environment typically suppresses quantum properties of physical systems via decoherence. This is one of the main obstacles in practical implementations of quantum protocols. We show how decoherence can be reversed/suppressed during quantum teleportation in a network scenario. Treating the environment quantumly, we show that under a general pure dephasing coupling, performing a second teleportation can probabilistically reverse the decoherence effects if certain commutativity conditions hold. This effect is purely quantum and most pronounced for qubit systems, where in 25% of instances the decoherence can be reversed completely. We show the effect in a physical model of a qubit register coupled to a bosonic bath. We also analyze general d-dimensional systems, identifying all instances of decoherence suppression. Our results are proof-of-concept but will be relevant for the emerging field of quantum networks as teleportation is the key building block of network protocols.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Quantum

ISSN

2521-327X

e-ISSN

2521-327X

Svazek periodika

7

Číslo periodika v rámci svazku

Feb.

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

16

Strana od-do

923

Kód UT WoS článku

000935221900001

EID výsledku v databázi Scopus

2-s2.0-85149637538