Interference-Induced Quantum Squeezing Enhancement in a Two-beam Phase-Sensitive Amplifier

Liu, Shengshuai; Lou, Yanbo; Jing, Jietai

doi:10.1103/physrevlett.123.113602

Cited by 62 publications

(32 citation statements)

References 53 publications

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“…The amplitude and phase quadrature variances of the teleported state carrying OAM mode with ℓ = 1 measured by Victor's BHD at 2 MHz sideband are shown in Fig. 3a (locking the relative phase between LO beam andâ out to 0 by micro-control unit 49,50 ) and Fig. 3b (locking the relative phase between LO beam andâ out to π/2 by proportionalintegral-differential circuit 49 ) of the EPR entanglement is 2.51 ± 0.16 dB (2.58 ± 0.18 dB) below the corresponding shot noise limit (SNL) as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…3 a (locking the relative phase between LO beam and to 0 by micro-control unit 49 , 50 ) and Fig. 3 b (locking the relative phase between LO beam and to π /2 by proportional-integral-differential circuit 49 ), respectively. The variance of amplitude quadrature difference (phase quadrature sum ) of the EPR entanglement is 2.51 ± 0.16 dB (2.58 ± 0.18 dB) below the corresponding shot noise limit (SNL) as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Orbital angular momentum multiplexed deterministic all-optical quantum teleportation

2020

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Quantum teleportation is one of the most essential protocol in quantum information. In addition to increasing the scale of teleportation distance, improving its information transmission capacity is also vital importance for its practical applications. Recently, the orbital angular momentum (OAM) of light has attracted wide attention as an important degree of freedom for realizing multiplexing to increase information transmission capacity. Here we show that by utilizing the OAM multiplexed continuous variable entanglement, 9 OAM multiplexed channels of parallel all-optical quantum teleportation can be deterministically established in experiment. More importantly, our parallel all-optical quantum teleportation scheme can teleport OAM-superposition-mode coded coherent state, which demonstrates the teleportation of more than one optical mode with fidelity beating the classical limit and thus ensures the increase of information transmission capacity. Our results open the avenue for deterministically implementing parallel quantum communication protocols and provide a promising paradigm for constructing high-capacity all-optical quantum communication networks.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Orbital angular momentum multiplexed deterministic all-optical quantum teleportation

2020

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“…[ 9–14 ] And the FWM process in the rubidium (Rb) atomic system is one of proven candidates for the generation of correlated twin beams. [ 15–24 ]…”

Section: Introductionmentioning

confidence: 99%

Three‐Mode Squeezing of Simultaneous and Ordinal Cascaded Four‐Wave Mixing Processes in Rubidium Vapor

Niu

et al. 2021

Annalen der Physik

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Multipartite quantum correlation plays a vital role in potential applications of quantum technologies. In this paper, using energy‐level cascaded four‐wave mixing (EC‐FWM) process, a scheme to produce quantum correlated three‐mode light beams within a single device of hot atomic medium of rubidium is proposed. Two‐ and three‐mode amplitude, phase quadrature squeezing and intensity difference squeezing using energy‐level simultaneous cascaded FWM (ESC‐FWM) method and energy‐level ordinal cascaded FWM (EOC‐FWM) method, respectively, is theoretically reported. Via investigating their covariance matrix properties, the comparison has been made between the two methods, which shows the ESC‐FWM method has a more stable mode structure than EOC‐FWM method. Moreover, versatile gain dependent squeezing via EC‐FWM is studied and analytical expressions are given. These results show a simplified and efficient experimental scheme producing multipartite quantum correlation among multiple spatially separated beams.

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“…Quantum light and its statistics ( 1 – 13 ) provide powerful tools for the study of properties of matter that are hard to retrieve with classical light. Novel spectroscopic and sensing techniques based on quantum light sources ( 14 ) can reveal information about complex material systems that is not accessible by simply varying the frequencies or time delays of classical light pulses ( 15 , 16 ).…”

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confidence: 99%

Multidimensional four-wave mixing signals detected by quantum squeezed light

Dorfman

Liu

Lou

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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Four-wave mixing (FWM) of optical fields has been extensively used in quantum information processing, sensing, and memories. It also forms a basis for nonlinear spectroscopies such as transient grating, stimulated Raman, and photon echo where phase matching is used to select desired components of the third-order response of matter. Here we report an experimental study of the two-dimensional quantum noise intensity difference spectra of a pair of squeezed beams generated by FWM in hot Rb vapor. The measurement reveals details of the χ(3) susceptibility dressed by the strong pump field which induces an AC Stark shift, with higher spectral resolution compared to classical measurements of probe and conjugate beam intensities. We demonstrate how quantum correlations of squeezed light can be utilized as a spectroscopic tool which unlike their classical counterparts are robust to external noise.

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Interference-Induced Quantum Squeezing Enhancement in a Two-beam Phase-Sensitive Amplifier

Cited by 62 publications

References 53 publications

Orbital angular momentum multiplexed deterministic all-optical quantum teleportation

Orbital angular momentum multiplexed deterministic all-optical quantum teleportation

Three‐Mode Squeezing of Simultaneous and Ordinal Cascaded Four‐Wave Mixing Processes in Rubidium Vapor

Multidimensional four-wave mixing signals detected by quantum squeezed light

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