One-step direct measurement of the entangled W states with cross-Kerr nonlinearity
نویسندگان
چکیده
We propose a scheme to directly measure the entangled W states with cross-Kerr nonlinearity mediums. find that well-designed structure can three-photon, four-photon and even N-photon in one step. Only PBSs mediums are used this scheme, which is feasible for experiments. explore measurement of three-photon extend it states.
منابع مشابه
Generation of four-photon polarization entangled decoherence-free states with cross-Kerr nonlinearity
We propose a theoretical protocol for preparing four-photon polarization entangled decoherence-free states, which are immune to the collective noise. With the assistance of the cross-Kerr nonlinearities, a two-photon spatial entanglement gate, two controlled-NOT gates, a four-photon polarization entanglement gate are inserted into the circuit, where X homodyne measurements are aptly applied. Co...
متن کاملCross-Kerr nonlinearity in optomechanical systems
All material supplied via Aaltodoc is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not ...
متن کاملGenerating entanglement of photon-number states with coherent light via cross-Kerr nonlinearity
We propose a scheme for generating entangled states of light fields. This scheme only requires the cross-Kerr nonlinear interaction between coherent light-beams, followed by a homodyne detection. Therefore, this scheme is within the reach of current technology. We study in detail the generation of the entangled states between two modes, and that among three modes. In addition to the Bell states...
متن کاملQuantum control gates with weak cross-Kerr nonlinearity
In this paper, with the weak cross-Kerr nonlinearity, we first present a special experimental scheme called controlled-path gate with which the realization of all possible bipartite positive-operator-value measurements of two-photon polarization states may be nearly deterministic. Following the same technique, the realization of quantum control gates, including the controlled-NOT gate, Fredkin ...
متن کاملQuantum measurement with entangled-photon states
Two photons in a pair generated in the nonlinear process of spontaneous parametric down conversion (SPDC) are, in general, strongly entangled. Accordingly, they contain extremely strong energy, time, polarization, and momentum quantum correlations. This entanglement involving more than one pair of quantum variable has served as a powerful tool in fundamental studies of quantum theory. It is now...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Indian Journal of Physics
سال: 2021
ISSN: ['0019-5480', '0974-9845', '0973-1458']
DOI: https://doi.org/10.1007/s12648-021-02097-y