Quantum statistics of Schrödinger cat states prepared by logical gate with non-Gaussian resource state

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Quantum statistics of Schrödinger cat states prepared by logical gate with non-Gaussian resource state. / Соколов, Иван Вадимович; Масалаева, Наталья Игоревна.

In: Physics Letters A, Vol. 424, 127846, 06.02.2022.

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

BibTeX

@article{b64b5a51e4c0414b9654fbdb159d166e,

title = "Quantum statistics of Schr{\"o}dinger cat states prepared by logical gate with non-Gaussian resource state",

abstract = "A measurement-induced continuous-variable logical gate is able to prepare Schr{\"o}dinger cat states if the gate uses a non-Gaussian resource state, such as cubic phase state (I.V. Sokolov (2020) [21]). Our scheme provides an alternative to hybrid circuits which use photon subtraction and (or) Fock resource states and photon number detectors. We reveal the conditions under which the gate conditionally prepares quantum superposition of two undistorted “copies” of an arbitrary input state that occupies a finite area in phase space. A detailed analysis of the fidelity between the gate output state and high-quality Schr{\"o}dinger cat state is performed. A clear interpretation of the output state quantum statistics in terms of Wigner function in dependence on the gate parameters and measurement outcome is presented for a representative set of input Fock states.",

keywords = "Continuous variable quantum networks, Cubic phase state, Measurement-induced evolution, Non-Gaussian gates, Schr{\"o}dinger cat states, INFORMATION, Schrodinger cat states, COMPUTATION",

author = "Соколов, {Иван Вадимович} and Масалаева, {Наталья Игоревна}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = feb,

day = "6",

doi = "10.1016/j.physleta.2021.127846",

language = "English",

volume = "424",

journal = "Physics Letters A",

issn = "0375-9601",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Quantum statistics of Schrödinger cat states prepared by logical gate with non-Gaussian resource state

AU - Соколов, Иван Вадимович

AU - Масалаева, Наталья Игоревна

PY - 2022/2/6

Y1 - 2022/2/6

N2 - A measurement-induced continuous-variable logical gate is able to prepare Schrödinger cat states if the gate uses a non-Gaussian resource state, such as cubic phase state (I.V. Sokolov (2020) [21]). Our scheme provides an alternative to hybrid circuits which use photon subtraction and (or) Fock resource states and photon number detectors. We reveal the conditions under which the gate conditionally prepares quantum superposition of two undistorted “copies” of an arbitrary input state that occupies a finite area in phase space. A detailed analysis of the fidelity between the gate output state and high-quality Schrödinger cat state is performed. A clear interpretation of the output state quantum statistics in terms of Wigner function in dependence on the gate parameters and measurement outcome is presented for a representative set of input Fock states.

AB - A measurement-induced continuous-variable logical gate is able to prepare Schrödinger cat states if the gate uses a non-Gaussian resource state, such as cubic phase state (I.V. Sokolov (2020) [21]). Our scheme provides an alternative to hybrid circuits which use photon subtraction and (or) Fock resource states and photon number detectors. We reveal the conditions under which the gate conditionally prepares quantum superposition of two undistorted “copies” of an arbitrary input state that occupies a finite area in phase space. A detailed analysis of the fidelity between the gate output state and high-quality Schrödinger cat state is performed. A clear interpretation of the output state quantum statistics in terms of Wigner function in dependence on the gate parameters and measurement outcome is presented for a representative set of input Fock states.

KW - Continuous variable quantum networks

KW - Cubic phase state

KW - Measurement-induced evolution

KW - Non-Gaussian gates

KW - Schrödinger cat states

KW - INFORMATION

KW - Schrodinger cat states

KW - COMPUTATION

UR - http://www.scopus.com/inward/record.url?scp=85119609119&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/629535a7-07fd-35bf-a64e-7ca258adee9c/

U2 - 10.1016/j.physleta.2021.127846

DO - 10.1016/j.physleta.2021.127846

M3 - Article

VL - 424

JO - Physics Letters A

JF - Physics Letters A

SN - 0375-9601

M1 - 127846

ER -

ID: 88878156