Five-partite entanglement generation between two optical frequency combs in a quasi-periodic χ
                     (2) nonlinear optical crystal

He, Guangqiang; Sun, Yu; Hu, Linxi; Zhang, Renhui; Chen, Xikun; Wang, Jindong

doi:10.1038/s41598-017-09346-3

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…Tripartite, or quadripartite multicolor entanglement has been predicted in second-order nonlinear devices [107], in particular when multiple cascaded second-order nonlinear interactions occur, in traveling-wave or intracavity processes [108][109][110]. Interestingly, a recent study based on the three-wave model of Equations (1)-(3) predicts five-partite entanglement between one-octave-distant modes [111]. This result suggests that quadratic combs could exhibit multipartite entanglement between frequency modes, which are essential for scalable measurement-based quantum computing [112].…”

Section: Perspectivesmentioning

confidence: 99%

Optical Frequency Combs in Quadratically Nonlinear Resonators

et al. 2020

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Optical frequency combs are one of the most remarkable inventions in recent decades. Originally conceived as the spectral counterpart of the train of short pulses emitted by mode-locked lasers, frequency combs have also been subsequently generated in continuously pumped microresonators, through third-order parametric processes. Quite recently, direct generation of optical frequency combs has been demonstrated in continuous-wave laser-pumped optical resonators with a second-order nonlinear medium inside. Here, we present a concise introduction to such quadratic combs and the physical mechanism that underlies their formation. We mainly review our recent experimental and theoretical work on formation and dynamics of quadratic frequency combs. We experimentally demonstrated comb generation in two configurations: a cavity for second harmonic generation, where combs are generated both around the pump frequency and its second harmonic and a degenerate optical parametric oscillator, where combs are generated around the pump frequency and its subharmonic. The experiments have been supported by a thorough theoretical analysis, aimed at modelling the dynamics of quadratic combs, both in frequency and time domains, providing useful insights into the physics of this new class of optical frequency comb synthesizers. Quadratic combs establish a new class of efficient frequency comb synthesizers, with unique features, which could enable straightforward access to new spectral regions and stimulate novel applications.

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Section: Perspectivesmentioning

confidence: 99%

Optical Frequency Combs in Quadratically Nonlinear Resonators

et al. 2020

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“…Nondegenerate optical parametric oscillators with or without the injected signal can directly produce two-color [9][10][11][12] or three-color CV entangled fields [13][14][15]. Besides, cascaded, concurrent and coupled nonlinear down conversion processes can generate multipartite CV entanglement beams with different frequencies [16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Bright four-color quadripartite entanglement from quasi-phase-matching cascaded nonlinear optical frequency conversion

Wang

Liu

et al. 2019

Laser Phys. Lett.

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We propose an experimentally feasible scheme to produce bright four-color continuousvariable entanglement by intracavity quasi-phase-matching cascaded nonlinear optical frequency conversion in only one optical superlattice. The second, third and fourth harmonics can be generated by frequency doubling of the input fundamental field at frequency ω, the sum frequency of fundamental and second harmonic fields, and frequency doubling of the second harmonic field, respectively. The entanglement properties influenced by system parameters are theoretically discussed according to the sufficient inseparability criterion proposed by van Loock and Furusawa. Such compact multipartite continuous-variable entanglement has potential applications in quantum communication and computation networks.

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“…The single pass of these cascaded nonlinear processes can also generate a three-colour CV entangled state [26,27]. Five-partite entanglement production was proposed by a cascaded four-wave mixing process [28] or coupled secondorder nonlinear interaction in two optical frequency combs [29]. Six-partite entanglement can be generated by coupled intracavity non-degenerate parametric down-conversion [30] or a coupled intracavity sum-frequency generation process [31].…”

Section: Introductionmentioning

confidence: 99%

Five-partite continuous-variable entanglement generated by cascaded nonlinear processes in only one optical superlattice

Yu¹,

Chu²,

Fan³

et al. 2018

Laser Phys. Lett.

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We theoretically investigate the generation of five-partite continuous-variable (CV) entanglement through injection-seeded non-degenerate optical parametric amplification cascaded two sum-frequency processes in only one optical superlattice without optical cavities. The idle can be generated by optical parametric amplification of pump and signal. Then, one beam will be generated by the cascaded sum-frequency process of pump and idle, and another beam will be produced by the cascaded sum-frequency process of pump and signal in the same optical superlattice. The phase-mismatching in the cascaded nonlinear processes can be compensated by three reciprocals of the optical superlattice by a quasi-phase-matching technique. The conversion dynamics among the cascaded nonlinear processes is analyzed by using a quantum stochastic method. The five-partite entanglement among pump, signal, idle, and two sum-frequency beams are discussed by applying a sufficient inseparability criteria for the five-partite CV entanglement proposed by Van Loock and Furusawa. This scheme of five-partite entanglement generation with different frequencies has potential applications in quantum communication and computation networks.

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Five-partite entanglement generation between two optical frequency combs in a quasi-periodic χ (2) nonlinear optical crystal

Cited by 5 publications

References 30 publications

Optical Frequency Combs in Quadratically Nonlinear Resonators

Optical Frequency Combs in Quadratically Nonlinear Resonators

Bright four-color quadripartite entanglement from quasi-phase-matching cascaded nonlinear optical frequency conversion

Five-partite continuous-variable entanglement generated by cascaded nonlinear processes in only one optical superlattice

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