Kvantna Rabijeva interferometrija gibanja in sevanja

Kvantna Rabijeva interferometrija gibanja in sevanja

Časovni žig: 31. maj 2023 10:03
Izvorno vozlišče: 2691521

Park Kimin1,2, Petr Marek1, Ulrik L. Andersen2, in Radim Filip1

1Oddelek za optiko, Univerza Palacky, 77146 Olomouc, Češka
2Center za makroskopska kvantna stanja (bigQ), Oddelek za fiziko, Tehnična univerza na Danskem, stavba 307, Fysikvej, 2800 kg. Lyngby, Danska

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Minimalizem

Natančno določitev premika mehanskega oscilatorja ali mikrovalovnega polja v vnaprej določeni smeri v faznem prostoru je mogoče izvesti z ujetimi ioni ali superprevodnimi vezji, s povezovanjem oscilatorja s ancilla kubiti.

Preko te sklopitve se informacije o premikanju prenesejo na kubite, ki se nato preberejo. Vendar pa nedvoumna ocena premika v neznani smeri v faznem prostoru v takih sistemih oscilator-kubit ni bila poskusena. Tukaj predlagamo hibridno interferometrično nastavitev oscilator-kubit za nedvoumno oceno premikov faznega prostora v poljubni smeri, ki temelji na izvedljivih Rabijevih interakcijah onkraj približka rotacijskega vala. Z uporabo takšnega hibridnega Rabijevega interferometra za kvantno zaznavanje pokažemo, da je zmogljivost boljša od tiste, ki jo dosežemo z enomodnimi ocenjevalnimi shemami in običajnim interferometrom, ki temelji na interakcijah Jaynes-Cummings. Poleg tega ugotavljamo, da je občutljivost Rabijevega interferometra neodvisna od toplotne zasedenosti načina oscilatorja, zato ga pred zaznavanjem ni potrebno ohladiti na osnovno stanje. Izvajamo tudi temeljito preiskavo učinka defaziranja kubitov in termalizacije oscilatorja. Ugotavljamo, da je interferometer dokaj robusten, saj prekaša različne primerjalne sheme ocenjevanja tudi za veliko defaziranje in termalizacijo.

Priljubljen povzetek

Razvili smo novo hibridno interferometrično nastavitev oscilator-kubit, ki omogoča nedvoumno oceno premikov faznega prostora v kateri koli smeri, s čimer izboljšamo prejšnje metode, ki so bile omejene na vnaprej določene smeri. Ta inovativni pristop, imenovan Rabijev interferometer, nudi vrhunsko zmogljivost v primerjavi z enomodnimi ocenjevalnimi shemami in običajnimi interferometri. Predvsem ne zahteva hlajenja oscilatorja v osnovno stanje in ostaja robusten tudi v prisotnosti defaziranja kubitov in termalizacije oscilatorja. Ta napredek v kvantnem zaznavanju bi lahko imel pomembne posledice za vrsto aplikacij.

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