Reconfigurable Hexapartite Entanglement by Spatially Multiplexed Four-Wave Mixing Processes

Zhang, Kai; Wang, Wei; Liu, Shengshuai; Pan, Xiaogang; Du, Jinjian; Lou, Yanbo; Yu, Shengkai; Lv, Shuchao; Treps, Nicolas; Fabre, Claude; Jing, Jietai

doi:10.1103/physrevlett.124.090501

Cited by 78 publications

(44 citation statements)

References 39 publications

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“…( 10 ) is for a single shot measurement owing to the collective feature. For single shot measurements, multipartite entanglement generation has also been performed in a collective atomic ensemble 35 , 36 . For the CBW measurements, phase stabilization of the MZI system is a prerequisite, where such MZI stabilization has already been satisfied even for a km range of MZI system 34 .…”

Section: Resultsmentioning

confidence: 99%

Macroscopic and deterministic quantum feature generation via phase basis quantization in a cascaded interferometric system

Ham

2021

Sci Rep

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Quantum entanglement is the quintessence of quantum information science governed by quantum superposition mostly limited to a microscopic regime. For practical applications, however, macroscopic entanglement has an essential benefit for quantum sensing and metrology to beat its classical counterpart. Recently, a coherence approach for entanglement generation has been proposed and demonstrated in a coupled interferometric system using classical laser light, where the quantum feature of entanglement has been achieved via phase basis superposition between identical interferometric systems. Such a coherence method is based on the wave nature of a photon without violating quantum mechanics under the complementarity theory. Here, a method of phase basis quantization via phase basis superposition is presented for macroscopic entanglement in an interferometric system, which is corresponding to the energy quantization of a photon.

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Section: Resultsmentioning

confidence: 99%

Macroscopic and deterministic quantum feature generation via phase basis quantization in a cascaded interferometric system

Ham

2021

Sci Rep

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“…[ 36,37 ] And using two pump beams of the same frequency to cascade FWM processes to generate multimode quantum correlated beams. [ 38–43 ]…”

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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“…In addition, the dual‐pump FWM protocol has been proven to be an efficient technique for the generation of multipartite entanglement due to the isotropy of the atomic ensemble. [ 31–34 ]…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the dual-pump FWM protocol has been proven to be an efficient technique for the generation of multipartite entanglement due to the isotropy of the atomic ensemble. [31][32][33][34] The quadruple quantum-correlated beams generated by the two-stage symmetric cascaded system (SCS) have been observed MHz is two-photon detuning. b) Two-stage SCS:â p0 is the coherent input of FWM 1 .â c0 ,â p1 , andâ c1 are the vacuum input of FWM 1 , FWM 2 , and FWM 3 respectively.â 1 is the amplified conjugate beam andâ 2 is the generated probe beam from the FWM 2 .â 3 is the generated conjugate beam andâ 4 is the amplified probe beam from the FWM 3 .…”

Section: Introductionmentioning

confidence: 99%

Genuine Quadripartite Continuous‐Variable Entanglement in Symmetric Cascaded Four‐Wave Mixing Process

Zhang

Ahmed

et al. 2020

Annalen der Physik

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The symmetric cascaded four‐wave mixing process is a phase‐insensitive and easy‐to‐implement technology to prepare quadripartite entanglement. However, it has not yet been discussed whether the state generated by this method is genuinely entangled. Here, it is shown that the genuine quadripartite entanglement criteria previously derived are not applicable to the symmetric cascaded scheme. Thus some more effective sufficient conditions are derived for detecting genuine entanglement in this work. The existence of genuine quadripartite entanglement is then confirmed through different entanglement witnesses. Under the premise that the quadripartite state is genuinely entangled, the quantum gain of the first‐stage determines the optimal range of the quantum gain of second‐stage. Finally, it is show that the four output modes are genuinely entangled within the appropriate quantum gain ranges when the optical loss of each step of the cascaded system is less than 10%. The results pave the way for the experimental generation of genuine quadripartite entanglement in symmetric cascaded scheme.

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Reconfigurable Hexapartite Entanglement by Spatially Multiplexed Four-Wave Mixing Processes

Cited by 78 publications

References 39 publications

Macroscopic and deterministic quantum feature generation via phase basis quantization in a cascaded interferometric system

Macroscopic and deterministic quantum feature generation via phase basis quantization in a cascaded interferometric system

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

Genuine Quadripartite Continuous‐Variable Entanglement in Symmetric Cascaded Four‐Wave Mixing Process

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