Experimental Ten-Photon Entanglement

Wang, Xi-Lin; Chen, Luo-Kan; Li, W.; Huang, He-Liang; Liu, C.; Chen, C.; Luo, Yi-Han; Su, Zu-En; Wu, Dajun; Li, Z.-D.; Lu, He; Hu, Yanjun; Jiang, Xiao; Peng, Cheng-Zhi; Li, L.; Liu, N.-L.; Chen, Yu-Ao; Lu, Chao‐Yang; Pan, Jian-Wei

doi:10.1103/physrevlett.117.210502

Cited by 517 publications

(342 citation statements)

References 43 publications

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“…It is important to note that the σ jl values feed into the quantum amplitude in the form of a tensorial product, and that it is the modulus square of the overall amplitude that determines the rate-as given by Eq. (26).…”

Section: Rate Computationmentioning

confidence: 99%

“…(26). The numerical procedure, a lattice sum calculation, follows earlier approaches for calculating quantum amplitudes associated with molecular aggregates [84,85].…”

Section: Rate Computationmentioning

confidence: 99%

“…Another active area of contemporary research involves looking at * david.andrews@physics.org entanglement between macroscopic bodies [25]. However, most theoretical and experimental work is centered upon the production and manipulation of entangled states involving two or more correlated photons [10]-with one recent experiment achieving entanglement with as many as ten photons [26]. It was with the use of correlated photon pairs that Aspect et al performed the first experiment that violated Bell's inequalities [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Quantum delocalization in photon-pair generation

et al. 2017

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The generation of correlated photon pairs is a key to the production of entangled quantum states, which have a variety of applications within the area of quantum information. In spontaneous parametric down-conversion-the primary method of generating correlated photon pairs-the associated photon annihilation and creation events are generally thought of as being colocated: The correlated pair of photons is localized with regards to the pump photon and its positional origin. A detailed quantum electrodynamical analysis highlights a mechanism exhibiting the possibility of a delocalized origin for paired output photons: The spatial extent of the region from which the pair is generated can be much larger than previously thought. The theory of both localized and nonlocalized degenerate down-conversion is presented, followed by a quantitative analysis using discrete-volume computational methods. The results may have significant implications for quantum information and imaging applications, and the design of nonlinear optical metamaterials.

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Section: Rate Computationmentioning

confidence: 99%

“…(26). The numerical procedure, a lattice sum calculation, follows earlier approaches for calculating quantum amplitudes associated with molecular aggregates [84,85].…”

Section: Rate Computationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantum delocalization in photon-pair generation

et al. 2017

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“…1) whereby a single pump photon splits into a pair of output twin photons, which again conserve energy. The output constitutes an entangled correlated photon pair15-16, a feature that itself links with another intensively researched field, [17][18] with major implications in a multitude of contemporary areas, particularly in the field of quantum information. [19][20][21] At the most significant level, both the processes of SHG and SPDC are third-order electric dipole couplings to the radiation.…”

Section: Introductionmentioning

confidence: 99%

Quantum localization issues in nonlinear frequency conversion and harmonic generation

Forbes

Ford

Andrews

2017

Quantum Nanophotonics

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Issues of a fundamental quantum origin exert a significant effect on the output mode structures in optically parametric processes. An assumption that each frequency conversion event occurs in an infinitesimal volume produces uncertainty in the output wave-vector, but a rigorous, photon-based theory can provide for a finite conversion volume. It identifies the electrodynamic mechanisms operating within the corresponding region of space and time, on an optical wavelength and cycle timescale. Based on quantum electrodynamics, this theory identifies specific material parameters that determine the extent and measure of delocalized frequency conversion, and its equations deliver information on the output mode structures. The results also indicate that a system of optimally sized nanoparticles can display a substantially enhanced efficiency of frequency conversion.

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“…However, creation of entangled states, involving large number of parties, is still a challenging task. For example, maximum number of particles among which entanglement have been generated are: fourteen by using trapped ions 17 , ten using photons 18 and five with superconducting qubits 19 . It is important to mention here that entangling multiple parties is important for better performance of quantum computer and quantum error correcting codes 1 than the classical ones [20][21][22] .…”

Section: Introductionmentioning

confidence: 99%