Generation of optical Schrödinger cat states by generalized photon subtraction

Takase, Kan; Yoshikawa, Jun–ichi; Asavanant, Warit; Endo, Mamoru; Furusawa, Akira

doi:10.1103/physreva.103.013710

Cited by 61 publications

(50 citation statements)

References 47 publications

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“…This advantage for

m = 0

with respect to two‐mode squeezed vacuum can be attributed to the single‐mode squeezing required in the generation of Schrödinger cat state (ref. [77] and references therein) which are used for preparing superposed bipartite coherent states at a beam‐splitter. [ 78 ] However,

false| ψ^{-} false⟩

has similar advantage only after considerable number of photon addition, that is,

m \geq 2

.…”

Section: Teleportation Of a Single‐mode Statementioning

confidence: 99%

Quantifying Quantum Correlation of Quasi‐Werner State and Probing Its Suitability for Quantum Teleportation

2021

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The significance of photon addition in engineering the single‐ and two‐mode (bipartite correlations) nonclassical properties of a quantum state is investigated. Specifically, the behavior of the Wigner function of two quasi‐Werner states constructed by superposing two normalized bipartite m‐photon added coherent states are analyzed. This allows the authors' to quantify the nonclassicality present in the quantum states using Wigner logarithmic negativity (WLN), while quantum correlations are measured using concurrence, entanglement of formation, and quantum discord. The WLN for a two‐mode state corresponds to the sum of the single‐mode nonclassicality and quantum correlations, and both of these are observed to enhance with photon addition manifesting the efficacy of photon addition in the entanglement distillation. Usefulness of photon addition is further established by showing that the performance of the quasi‐Werner states as quantum channel for the teleportation of single‐mode coherent and squeezed states, as quantified via teleportation fidelity, improves with the photon addition. The non‐Gaussian operation is shown effective in stalling the detrimental effects of transmission through noisy channel and/or inefficient detection under realistic scenario. Further, in contrast to a set of existing results, it is established that the negative values of two‐mode Wigner function is not a witness of quantum correlation.

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“…This advantage for

m = 0

false| ψ^{-} false⟩

has similar advantage only after considerable number of photon addition, that is,

m \geq 2

.…”

Section: Teleportation Of a Single‐mode Statementioning

confidence: 99%

Quantifying Quantum Correlation of Quasi‐Werner State and Probing Its Suitability for Quantum Teleportation

2021

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“…In particular, let = 0 . If we measure the first output channel and detect m photons, then the unnormalized reduced density matrix is Remark 16 Many schemes like those proposed in [87][88][89][90][91][92][93][94][95][96] that generate Schrödinger cat states can be described uniformly in the mathematical framework similar to that discussed above.…”

Section: Schrödinger Cat States Generationmentioning

confidence: 99%

Control engineering of continuous-mode single-photon states: a review

Zhang

2021

Control Theory Technol.

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In this survey, we present single-photon states of electromagnetic fields, discuss discrete measurements of a single-photon field, show how a linear quantum system responds to a single-photon input, investigate how a coherent feedback network can be used to manipulate the temporal pulse shape of a single-photon state, present single-photon filter and master equations, and finally discuss the generation of Schrödinger cat states by means of photon addition and subtraction.

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“…These states have been produced experimentally using the optical Kerr effect in 1986 by Yurke and Stoler [8]. Among more recent experimental procedures suggested for generation of optical cat states are the method based on photon subtraction of an optical squeezed state [9][10][11][12] and the protocol that uses homodyne detection and photon number states [13] (see [14] for a review on generating cat states).…”

Section: Introductionmentioning

confidence: 99%

Discrimination and decoherence of Schrödinger cat states in lossy quantum channels

Goncharov¹,

Kiselev²,

Веселкова³

et al. 2021

Nanosystems: Phys. Chem. Math.

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We investigate environment induced effects of decoherence in discrimination between the Schrödinger cat states transmitted through noisy quantum channels such as optical fibers. We calculate the fidelity and the statistics of photocounts for both even and odd coherent states. The method that uses the beam splitter-like transformation acting in the enlarged Hilbert space to model the quantum channel is compared with the approach based on the Lindblad dynamics of one-mode bosonic systems.

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Generation of optical Schrödinger cat states by generalized photon subtraction

Cited by 61 publications

References 47 publications

Quantifying Quantum Correlation of Quasi‐Werner State and Probing Its Suitability for Quantum Teleportation

Quantifying Quantum Correlation of Quasi‐Werner State and Probing Its Suitability for Quantum Teleportation

Control engineering of continuous-mode single-photon states: a review

Discrimination and decoherence of Schrödinger cat states in lossy quantum channels

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