Qubit gate operations in elliptically trapped polariton condensates

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Qubit gate operations in elliptically trapped polariton condensates. / Ricco, L.S.; Shelykh, I.A.; Kavokin, A.

In: Scientific Reports, Vol. 14, No. 1, 4211, 20.02.2024.

Research output: Contribution to journal › Article › peer-review

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Ricco, L.S. ; Shelykh, I.A. ; Kavokin, A. / Qubit gate operations in elliptically trapped polariton condensates. In: Scientific Reports. 2024 ; Vol. 14, No. 1.

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@article{2cdc5ae59eba481c8fae4433d833f5cc,

title = "Qubit gate operations in elliptically trapped polariton condensates",

abstract = "We consider bosonic condensates of exciton-polaritons optically confined in elliptical traps. A superposition of two non-degenerated p-type states of the condensate oriented along the two main axes of the trap is represented by a point on a Bloch sphere, being considered as an optically tunable qubit. We describe a set of universal single-qubit gates resulting in a controllable shift of the Bloch vector by means of an auxiliary laser beam. Moreover, we consider interaction mechanisms between two neighboring traps that enable designing two-qubit operations such as CPHASE and CNOT gates. Both the single- and two-qubit gates are analyzed in the presence of error sources in the context of polariton traps, such as pure dephasing and spontaneous relaxation mechanisms, leading to a fidelity reduction of the final qubit states and quantum concurrence, as well as the increase of Von Neumann entropy. We also discuss the applicability of our qubit proposal in the context of DiVincenzo{\textquoteright}s criteria for the realization of local quantum computing processes. Altogether, the developed set of quantum operations would pave the way to the realization of a variety of quantum algorithms in a planar microcavity with a set of optically induced elliptical traps. {\textcopyright} The Author(s) 2024.",

keywords = "quantum dot, algorithm, article, entropy, human, laser, therapy",

author = "L.S. Ricco and I.A. Shelykh and A. Kavokin",

note = "Export Date: 4 March 2024 Адрес для корреспонденции: Ricco, L.S.; Science Institute, Dunhagi-3, Iceland; эл. почта: lsricco@hi.is Адрес для корреспонденции: Kavokin, A.; Key Laboratory for Quantum Materials of Zhejiang Province, China; эл. почта: a.kavokin@westlake.edu.cn Сведения о финансировании: Icelandic Centre for Research, RANNIS, 163082-51, 239552-051, FSMG-2023-0011 Сведения о финансировании: Saint Petersburg State University, SPbU, 95442589 Текст о финансировании 1: L.S.R. acknowledges the support from the Icelandic Research Fund (Rann{\'i}s), Grants No. 163082-51 and 239552-051. The work of I.A.S. was supported by Goszadaniye No FSMG-2023-0011. A.K. acknowledges the support of the Saint Petersburg State University through Research Grant No. 95442589. We acknowledge Aleksey Fedorov, Helgi Sigur{\dh}sson, and Boris Altshuler for fruitful discussions. We also acknowledge Roman Cherbunin for designing the read-out scheme of a two-qubit polariton gate. Текст о финансировании 2: L.S.R. acknowledges the support from the Icelandic Research Fund (Rann{\'i}s), Grants No. 163082-51 and 239552-051. The work of I.A.S. was supported by Goszadaniye No FSMG-2023-0011. A.K. acknowledges the support of the Saint Petersburg State University through Research Grant No. 95442589. We acknowledge Aleksey Fedorov, Helgi Sigur{\dh}sson, and Boris Altshuler for fruitful discussions. We also acknowledge Roman Cherbunin for designing the read-out scheme of a two-qubit polariton gate. Пристатейные ссылки: Kavokin, A., Liew, T.C.H., Schneider, C., Lagoudakis, P.G., Klembt, S., Hoefling, S., Polariton condensates for classical and quantum computing (2022) Nat. Rev. Phys, 4, p. 435; Liew, T.C.H., The future of quantum in polariton systems: Opinion (2023) Opt. Mater. Express, 13, p. 1938. , 2023OMExp.13.1938L, 1:CAS:528:DC%2BB3sXhvVSksrfK; Sanvitto, D., K{\'e}na-Cohen, S., The road towards polaritonic devices (2016) Nat. 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year = "2024",

month = feb,

day = "20",

doi = "10.1038/s41598-024-54543-6",

language = "Английский",

volume = "14",

journal = "Scientific Reports",

issn = "2045-2322",

publisher = "Nature Publishing Group",

number = "1",

}

RIS

TY - JOUR

T1 - Qubit gate operations in elliptically trapped polariton condensates

AU - Ricco, L.S.

AU - Shelykh, I.A.

AU - Kavokin, A.

N1 - Export Date: 4 March 2024 Адрес для корреспонденции: Ricco, L.S.; Science Institute, Dunhagi-3, Iceland; эл. почта: lsricco@hi.is Адрес для корреспонденции: Kavokin, A.; Key Laboratory for Quantum Materials of Zhejiang Province, China; эл. почта: a.kavokin@westlake.edu.cn Сведения о финансировании: Icelandic Centre for Research, RANNIS, 163082-51, 239552-051, FSMG-2023-0011 Сведения о финансировании: Saint Petersburg State University, SPbU, 95442589 Текст о финансировании 1: L.S.R. acknowledges the support from the Icelandic Research Fund (Rannís), Grants No. 163082-51 and 239552-051. The work of I.A.S. was supported by Goszadaniye No FSMG-2023-0011. A.K. acknowledges the support of the Saint Petersburg State University through Research Grant No. 95442589. We acknowledge Aleksey Fedorov, Helgi Sigurðsson, and Boris Altshuler for fruitful discussions. We also acknowledge Roman Cherbunin for designing the read-out scheme of a two-qubit polariton gate. Текст о финансировании 2: L.S.R. acknowledges the support from the Icelandic Research Fund (Rannís), Grants No. 163082-51 and 239552-051. The work of I.A.S. was supported by Goszadaniye No FSMG-2023-0011. A.K. acknowledges the support of the Saint Petersburg State University through Research Grant No. 95442589. We acknowledge Aleksey Fedorov, Helgi Sigurðsson, and Boris Altshuler for fruitful discussions. We also acknowledge Roman Cherbunin for designing the read-out scheme of a two-qubit polariton gate. Пристатейные ссылки: Kavokin, A., Liew, T.C.H., Schneider, C., Lagoudakis, P.G., Klembt, S., Hoefling, S., Polariton condensates for classical and quantum computing (2022) Nat. Rev. Phys, 4, p. 435; Liew, T.C.H., The future of quantum in polariton systems: Opinion (2023) Opt. Mater. Express, 13, p. 1938. , 2023OMExp.13.1938L, 1:CAS:528:DC%2BB3sXhvVSksrfK; Sanvitto, D., Kéna-Cohen, S., The road towards polaritonic devices (2016) Nat. 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PY - 2024/2/20

Y1 - 2024/2/20

N2 - We consider bosonic condensates of exciton-polaritons optically confined in elliptical traps. A superposition of two non-degenerated p-type states of the condensate oriented along the two main axes of the trap is represented by a point on a Bloch sphere, being considered as an optically tunable qubit. We describe a set of universal single-qubit gates resulting in a controllable shift of the Bloch vector by means of an auxiliary laser beam. Moreover, we consider interaction mechanisms between two neighboring traps that enable designing two-qubit operations such as CPHASE and CNOT gates. Both the single- and two-qubit gates are analyzed in the presence of error sources in the context of polariton traps, such as pure dephasing and spontaneous relaxation mechanisms, leading to a fidelity reduction of the final qubit states and quantum concurrence, as well as the increase of Von Neumann entropy. We also discuss the applicability of our qubit proposal in the context of DiVincenzo’s criteria for the realization of local quantum computing processes. Altogether, the developed set of quantum operations would pave the way to the realization of a variety of quantum algorithms in a planar microcavity with a set of optically induced elliptical traps. © The Author(s) 2024.

AB - We consider bosonic condensates of exciton-polaritons optically confined in elliptical traps. A superposition of two non-degenerated p-type states of the condensate oriented along the two main axes of the trap is represented by a point on a Bloch sphere, being considered as an optically tunable qubit. We describe a set of universal single-qubit gates resulting in a controllable shift of the Bloch vector by means of an auxiliary laser beam. Moreover, we consider interaction mechanisms between two neighboring traps that enable designing two-qubit operations such as CPHASE and CNOT gates. Both the single- and two-qubit gates are analyzed in the presence of error sources in the context of polariton traps, such as pure dephasing and spontaneous relaxation mechanisms, leading to a fidelity reduction of the final qubit states and quantum concurrence, as well as the increase of Von Neumann entropy. We also discuss the applicability of our qubit proposal in the context of DiVincenzo’s criteria for the realization of local quantum computing processes. Altogether, the developed set of quantum operations would pave the way to the realization of a variety of quantum algorithms in a planar microcavity with a set of optically induced elliptical traps. © The Author(s) 2024.

KW - quantum dot

KW - algorithm

KW - article

KW - entropy

KW - human

KW - laser

KW - therapy

UR - https://www.mendeley.com/catalogue/1a9e5fa1-1a6b-34dd-95aa-4a8c577351c2/

U2 - 10.1038/s41598-024-54543-6

DO - 10.1038/s41598-024-54543-6

M3 - статья

C2 - 38378989

VL - 14

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 4211

ER -

ID: 117318843