Effects of dispersion on squeezing and photon statistics of down-converted light

Takahashi, Y.; Söderholm, Jonas; Hirano, Keiichi; Namekata, Naoto; Machida, Susumu; Mori, Shigehiko; Kurimura, Sunao; Komatsu, Shinichi; Inoue, Shuichiro

doi:10.1103/physreva.77.043801

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…Squeezing of light pulses, which is more adequate for our circuits, is typically much weaker than continuous-mode squeezing. Probably, the highest reported experimental pulse-mode squeezing is only about -3 dB below the shot-noise level: -3 dB [27], -3.1 dB [28], and -3.2 dB [29].…”

Section: Introductionmentioning

confidence: 93%

Quantum circuits for amplification of Kerr nonlinearity via quadrature squeezing

Bartkowiak

Miranowicz

2014

J. Phys. B: At. Mol. Opt. Phys.

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Phase shifts induced by the Kerr effect are usually very small at the single-photon level. We propose two circuits for enhancing the cross-Kerr phase shift by applying one-and two-mode quadrature squeezing operators. Our results are based on the vector coherent state theory and can be implemented by physical operations satisfying the commutation relations for generators of the generalized special unitary group SU(1,1). While the proposed methods could be useful for the realization of quantum optical entangling gates based on Kerr nonlinear media at the single-photon level, they also indicate a general alternative approach to enhance higher-order nonlinearities by applying lowerorder nonlinear effects.

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Section: Introductionmentioning

confidence: 93%

Quantum circuits for amplification of Kerr nonlinearity via quadrature squeezing

Bartkowiak

Miranowicz

2014

J. Phys. B: At. Mol. Opt. Phys.

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“…[18][19][20][21] Takahashi et al investigated the effects of dispersion on both quadrature squeezing and photon statis-tics by varying the interaction length when pumping a PPLN crystal with fs pulses. [22] We studied the phase mismatched phenomenon resulting from the dispersion effect, by periodically changing the polarity of crystal to obtain the optimal squeezing condition, and obtained the characteristic of EPR entanglements. [23] In this paper, we discuss the influence of the dispersion effect, find the solution of the time-dependent FPE with the dispersion, and investigate the entanglement characteristics for N = 2-5 partite.…”

Section: Introductionmentioning

confidence: 99%

Effect of the dispersion on multipartite continuous-variable entanglement in optical parametric amplifier

Zhao

2015

Chinese Phys. B

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Based on the quantum fluctuations, we adopt the method of generalized V1 criterion to investigate multipartite entanglement characteristics in an optical parametric amplification system with the consideration of dispersion. The nonlinear interaction becomes strong because of the existence of dispersion coefficient σ . Considering the influence of dispersion factor σ , with increasing the pump parameter μ , the value of minimum variance V1 decreases and the squeezing curve nearly equals 1/(1 + μ ). The larger particle number N results in a smaller variance and higher entanglement.

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The quantum stellar interferometer

Riaud

2012

Eur. Phys. J. D

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Effects of dispersion on squeezing and photon statistics of down-converted light

Cited by 4 publications

References 37 publications

Quantum circuits for amplification of Kerr nonlinearity via quadrature squeezing

Quantum circuits for amplification of Kerr nonlinearity via quadrature squeezing

Effect of the dispersion on multipartite continuous-variable entanglement in optical parametric amplifier

The quantum stellar interferometer

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