Generation of multicolored tripartite entanglement by frequency doubling in a two-port resonator

Yang, Rongguo; Zhai, Shuqin; Liu, Kui; Zhang, Junxiang; Gao, Jiangrui

doi:10.1364/josab.27.002721

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…Tripartite entanglement, with the least number of entangled multi-party, is of great significance. Tripartite entanglement can be generated by coupling squeezed beams on beam splitters [4], or directly through nonlinear processes such as optical parametric down-conversion [5][6][7][8][9], second harmonic generation [10][11][12][13] and atomic four-wave mixing [14,15]. Unlike method with beam splitter mixing of the same-frequency modes, direct optical parametric oscillator (OPO) could generate multicolor multipartite entanglement, which has wider applications into quantum internet [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Tripartite entanglement in a detuned non-degenerate optical parametric oscillator

Guo,

Tian,

Sun

2024

J. Opt.

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Continuous variable multipartite entanglement is an important resource in quantum optics and quantum information. Non-degenerate optical parametric oscillator (NOPO), generally working in a resonant regime, can generate high quality tripartite entanglement. However, the detuning in a real experiment is inevitable and sometimes necessary, for instance, in an optomechanical system. We calculate the tripartite entanglement from a detuned triply quasi-resonant NOPO. Unlike the previous literature using inseparability criterion, we use the positivity of partial transpose (PPT), a sufficient and necessary criterion, to characterize the tripartite entanglement with full inseparability generated from a detuned NOPO. We also consider the influence of the pump and signal/idler losses on the tripartite entanglement. The results show that, the tripartite entanglement could exist even with a large detunings of several times cavity linewidth, and may be better for a detuned regime than for the resonant one under some conditions. With a fixed non-zero loss which always exists in a real experiment, an appropriate value of non-zero detuning could lead to the best entanglement. What's more, unlike the bipartite entanglement, which exists both below and above threshold, the tripartite entanglement only occurs for a nonzero classical amplitude of signal/idler fields. The jumping between the tripartite and bipartite entanglement could make the NOPO become a quantum state switch element, which promises a potential application on the multiparty quantum secret sharing.

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Section: Introductionmentioning

confidence: 99%

Tripartite entanglement in a detuned non-degenerate optical parametric oscillator

Guo,

Tian,

Sun

2024

J. Opt.

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“…[4][5][6] Generally, the continuous-variable (CV) bipartite entanglement can be generated in diverse systems, such as optical parametric amplifier (OPA) or optical parametric oscillator (OPO), [7,8] combination of two squeezed lights with a beam splitter, [9,10] and can be applied in different protocols of quantum communication. [11,12] In recent years, generating CV multipartite entangled states has been widely investigated in diverse methods, such as cascaded nonlinear processes, [13,14] dual-ported frequency doubling process, [15,16] and four-wave mixing process. [17][18][19][20][21] On the one hand, multipartite entangled states with different frequencies, especially including the fiber communication windows and the atomic transition lines, are more practical in applications of quantum communication networks and quantum storage.…”

Section: Introductionmentioning

confidence: 99%

Parallel generation of 31 tripartite entangled states based on optical frequency combs

Zhang¹,

Wang²,

Liu³

et al. 2017

Chinese Phys. B

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Quantum entangled states, especially those having particular properties, are key resources for quantum information and quantum computation. In this paper, we put forward a new scheme to produce 31 continuous-variable (CV) tripartite entanglement fields based on three optical frequency combs via cascade nonlinear processes in an optical parametric cavity, and investigate the spectral characteristics of three frequency combs. The center wavelengths of the three combs are designed as 852 nm, 780 nm (atomic transition lines), and 1550 nm (fiber communication wavelength). The positivity under partial transposition (PPT) criterion, which is sufficient and necessary, is used to evaluate the entanglement in each group of comb lines. This scheme is experimentally feasible and valuable for constructing quantum information networks in future.

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“…Other suggestions were proposed to generate two-color tripartite entanglement among the fundamental and the second-harmonic fields through the type-II SHG system operating below [11] and above [12] the threshold. In addition, multicolored tripartite CV entanglement generated in a two-port resonator of SHG process was also investigated by applying a necessary and sufficient entanglement criterion [13].…”

Section: Introductionmentioning

confidence: 99%

Directly produced three-color entanglement by quasi-phase-matched third-harmonic generation

Yu¹,

Wang²,

Zhu³

2011

Opt. Express

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A new scheme is presented to directly produce fundamental, second-, and third-harmonic three-color continuous-variable (CV) entangled beams by cascaded quasi-phase-matched third-harmonic generation (THG) in an optical cavity. THG can be achieved with high efficiency through a coupled sum-frequency process between the second-harmonic and the fundamental fields. It is demonstrated that the three beams (fundamental, second-, and third-harmonic fields) are entangled with each other according to the CV entanglement criterion. In this scheme, only one crystal and one pump field can generate three-color CV entangled beams separated by an octave in frequency through quasi-phase-matched cascaded nonlinear process, which may be very useful for the applications in quantum communication and computation networks.

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Generation of multicolored tripartite entanglement by frequency doubling in a two-port resonator

Cited by 6 publications

References 28 publications

Tripartite entanglement in a detuned non-degenerate optical parametric oscillator

Tripartite entanglement in a detuned non-degenerate optical parametric oscillator

Parallel generation of 31 tripartite entangled states based on optical frequency combs

Directly produced three-color entanglement by quasi-phase-matched third-harmonic generation

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