Scheme for generating coherent-state superpositions with realistic cross-Kerr nonlinearity

He, Bing; Nadeem, Mustansar; Bergou, János A.

doi:10.1103/physreva.79.035802

Cited by 79 publications

(43 citation statements)

References 21 publications

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“…As the phase shift can be measured by the homodyne measurement, the photon number in each spatial mode can be detected without destroying the photons. The crossKerr nonlinearity provides a good way to construct the QND, which has played an important role in the quantum information field, such as quantum logic gate [77,78], quantum teleportation [79], entanglement purification and concentration [43][44][45][46][47], and so on [80][81][82][83][84][85][86][87][88][89][90][91].…”

Section: The Second Ecp For the Single-photon Entanglementmentioning

confidence: 99%

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Zhou

Wang

et al. 2017

Front. Phys.

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We propose two efficient entanglement concentration protocols (ECPs) for arbitrary less-entangled single-photon entanglement state, in which the photon qubit has the polarization feature. The first ECP is in linear optics, and the second ECP is in nonlinear optics. The two ECPs have some attractive advantages. First, they can preserve the polarization feature of the photon qubit, while all the other existing ECPs for single photon state cannot achieve this goal. Second, they only require one pair of less-entangled single-photon entanglement state and some auxiliary single photons. Third, they only require local operations. Especially, the second ECP can be used repeatedly, which can increase its success probability largely. Based on above properties, our two ECPs, especially the second one may be useful in current and future quantum communication.

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Section: The Second Ecp For the Single-photon Entanglementmentioning

confidence: 99%

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Zhou

Wang

et al. 2017

Front. Phys.

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“…But the main drawback of these techniques is that their success probability drops quickly with an increasing size of the output state. A first possibility for overcoming this issue is to work with cubic nonlinearities in cavities [19][20][21][22][23][24], but the trapped state cannot be used for quantum communication protocols. This technology is, however, the most efficient one, as cats with up to 100 photons have been produced with superconducting qubits [24], Another possibility is to increase the size of the CS iteratively: mixing two CSs with small amplitude on a beam splitter produces bigger CSs if the proper measurement is performed on one output arm.…”

mentioning

confidence: 99%

Experimental Generation of Squeezed Cat States with an Operation Allowing Iterative Growth

et al. 2015

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We present what is, to our knowledge, the first implementation of a "cat breeding" operation, which allows an iterative growth of cat states. We thus report the experimental generation of a squeezed cat state from two single photon Fock states, which can be seen as cat states with zero amplitude. These Fock states are mixed on a symmetrical beam splitter, and the generation is heralded by a homodyne measurement in one of the two output arms. The output state has a fidelity of 61% with an even squeezed cat state of amplitude α=1.63. This hybrid operation opens up new prospects in quantum optics, as the protocol depicted here can be iterated in order to produce new kinds of mesoscopic states.

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“…One can exactly check the number of photons in the Fock state but not destroy them. In fact, the cross-Kerr nonlinearity has been widely studied in construction of controlled-NOT gates [36], performing entanglement purification protocols [15][16][17]37,38], performing ECPs [29,30], completing Bell-state analysis [39], and performing other quantum communication and computation [40][41][42][43][44][45][46][47][48][49][50][51][52][53]. Now, we will introduce the basic principle of our ECP for partially entangled cluster states with weak cross-Kerr nonlinearity.…”

Section: Entanglement Concentration Of Less-entangled Cluster Statesmentioning

confidence: 99%

Efficient entanglement concentration for partially entangled cluster states with weak cross-Kerr nonlinearity

Liu

Fan

Xia

et al. 2015

Quantum Inf Process

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In this paper, we propose an optimal entanglement concentration protocol (ECP) for partially entangled cluster states with the help of the weak cross-Kerr nonlinearity. We can obtain the maximally entangled cluster states assisted with the projection measurements on the additional photons. The protocol is based on optical elements, single polarization photons, cross-Kerr nonlinearity, and the conventional photon detectors, which are feasible with existing experimental technology. Numerical simulation demonstrates that by iterating the entanglement concentration process n = m = 6 times, the ECP has the approximate maximal success probability 100 %. Moreover, the present protocol is also suitable for partially entangled 4N -photon cluster states concentration. All these advantages make this protocol more efficient and more convenient than others in the applications in quantum communication.

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Scheme for generating coherent-state superpositions with realistic cross-Kerr nonlinearity

Cited by 79 publications

References 21 publications

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Experimental Generation of Squeezed Cat States with an Operation Allowing Iterative Growth

Efficient entanglement concentration for partially entangled cluster states with weak cross-Kerr nonlinearity

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