Slowing quantum decoherence of oscillators by hybrid processing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73613192" target="_blank" >RIV/61989592:15310/22:73613192 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.nature.com/articles/s41534-022-00577-5.pdf" target="_blank" >https://www.nature.com/articles/s41534-022-00577-5.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41534-022-00577-5" target="_blank" >10.1038/s41534-022-00577-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Slowing quantum decoherence of oscillators by hybrid processing

Popis výsledku v původním jazyce

Quantum information encoded into the superposition of coherent states is an illustrative representation of practical applications of macroscopic quantum coherence possessing. However, these states are very sensitive to energy loss, losing their non-classical aspects of coherence very rapidly. An available deterministic strategy to slow down this decoherence process is to apply a Gaussian squeezing transformation prior to the loss as a protective step. Here, we propose a deterministic hybrid protection scheme utilizing strong but feasible interactions with two-level ancillas immune to spontaneous emission. We verify the robustness of the scheme against the dephasing of qubit ancilla. Our scheme is applicable to complex superpositions of coherent states in many oscillators, and remarkably, the robustness to loss is enhanced with the amplitude of the coherent states. This scheme can be realized in experiments with atoms, solid-state systems, and superconducting circuits.

Název v anglickém jazyce

Slowing quantum decoherence of oscillators by hybrid processing

Popis výsledku anglicky

Quantum information encoded into the superposition of coherent states is an illustrative representation of practical applications of macroscopic quantum coherence possessing. However, these states are very sensitive to energy loss, losing their non-classical aspects of coherence very rapidly. An available deterministic strategy to slow down this decoherence process is to apply a Gaussian squeezing transformation prior to the loss as a protective step. Here, we propose a deterministic hybrid protection scheme utilizing strong but feasible interactions with two-level ancillas immune to spontaneous emission. We verify the robustness of the scheme against the dephasing of qubit ancilla. Our scheme is applicable to complex superpositions of coherent states in many oscillators, and remarkably, the robustness to loss is enhanced with the amplitude of the coherent states. This scheme can be realized in experiments with atoms, solid-state systems, and superconducting circuits.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/GX21-13265X" target="_blank" >GX21-13265X: Kvantová ne-Gaussovská koherence</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

npj Quantum Information

ISSN

2056-6387

e-ISSN

2056-6387

Svazek periodika

8

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

"67-1"-"67-8"

Kód UT WoS článku

000811740100001

EID výsledku v databázi Scopus

2-s2.0-85132072988