cross-Kerr nonlinearityWe propose a protocol for realizing two entanglement concentration scheme with cross-Kerr nonlinearity and double cross-phase modulation method. In our protocols, two remote parties do not require the accurate information of the less entangled state and the double cross-phase ...
We analyse the combined effect of the radiation-pressure and cross-Kerr nonlinearity on the stationary solution of the dynamics of a nanomechanical resonator interacting with an electromagnetic cavity. Within this setup,we show how the optical bistability picture induced by the radiation-pressure force ...
We consider the response of a nanomechanical resonator interacting with an electromagnetic cavity via a radiation pressure coupling and a cross-Kerr coupling. Using a mean field approach we solve the dynamics of the system, and show the different corrections coming from the radiation pressure and ...
In particular, the large cross-Kerr nonlinearity without nonlinear absorption can be realized by suitably adjusting the incoherent population exchange. Additionally, the dependence of y -intercepts of absorption or dispersion curves without control field on the population exchange rate can be used to ...
cross-Kerr nonlinearityWe propose a protocol to generate a four-photon polarization-entangled cluster state with cross-Kerr nonlinearity by using the interference of polarized photons. The protocol is based on optical elements, cross-Kerr nonlinearity, and homodyne measurement, therefore it is feasible ...
We propose practical schemes for concentrating entanglement of a pair of unknown partially entangled Bell states and three-photon W states with cross-Kerr nonlinearity. In the schemes, utilizing local operations and classical communication, two separated parties can obtain one maximally entangled photon ...
Most of previous quantum computations only take use of one degree of freedom (DoF) of photons. An experimental system may possess various DoFs simultaneously. In this paper, with the weak cross-Kerr nonlinearity, we investigate the parallel quantum compu
Quantum computation assisted by the weak cross-Kerr nonlinearity. Previous schemes have shown that the controlled logic gates may be performed on the polarization state using the spatial DoF as auxil- iary quantum resources12–14,22,23. Although it is easy to switch different DoFs of one ...
proposed an efficient scheme to complete three-photon hyperentangled GHZ-state analysis (HGSA) with the help of the cross-Kerr nonlinearity [36]. In Ref. [36], they used the hyperentanglement which is entangled in polarization DOF and spatial-mode DOF. In 2013, Song et al. proposed a ...
Strong cross-Kerr nonlinearities have been long sought after for quantum information applications. Recent work has shown that they are intrinsically unreliable in traveling-wave configurations: cavity configurations avoid this, but require knowledge of both the nonlinearity and the loss. Here we present ...