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International Conference on Advanced Communication Technology

Practicable scheme to generate the three photon entangled state with linear optical elements

Siriporn Saiburee, Wanchai Pijitrojana

Published Feb 1, 2014• 1 citation
Publisher

Abstract

This paper proposed practicable scheme for generation of the three photon entangled states without any nonlinear optical process. The three-photon entanglement can be achieved by using linear optical elements with post selection based on the photons interferometry. The success probability of proposed method is 3/16, higher than the previous methods using the linear optical system.

DOI
10.1109/icact.2014.6779011

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This paper proposed practicable scheme for generation of the three photon entangled states without any nonlinear optical process. The three-photon entanglement can be achieved by using linear optical elements with post selection based on the photons interferometry. The success probability of proposed method is 3/16, higher than the previous methods using the linear optical system.
We propose a novel linear optical scheme to generate a three-photon W state, which is based on postselection of final outcome events. The success probability of our proposal has been improved to be 21/32, higher than that of the previous methods using the linear optical system. We also discuss the effects of realistic photon resources on its experimental realization and compare our scheme with the nonlinear optical approach to the three-photon W state generation. The idea of our proposal suggests a new way to improve the generation efficiency of some other entangled states and may have a promising application.
We present a linear-optical scheme for generating an arbitrary state of three qubits. It requires only three independent particles in the input and post-selection of the coincidence type at the output. The success probability of the protocol is equal for any desired state. Furthermore, the optical design remains insensitive to particle statistics (bosons, fermions or anyons). This approach builds upon the no-touching paradigm, which demonstrates the utility of particle indistinguishability as a resource of entanglement for practical applications.
A simple experimental scheme is proposed to generate a three-photon entangled WWW state and a genuine four-photon entangled state $|{\ensuremath{\chi}}^{00}⟩$ that has many interesting entanglement properties and possible applications in quantum information processing. These multipartite entangled states can be generated with a certain success probability. We show that even when the quantum efficiency of the detector is $\ensuremath{\eta}=0.75$, the success probability can reach $2.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ for WWW-state production and $3.0\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}$ for $|{\ensuremath{\chi}}^{00}⟩$-state production. The scheme is based only on simple linear optical elements and conventional photon detectors, which greatly decrease the experimental difficulty of implementing linear optical quantum computation.
We present a scheme to generate the polarization-entangled two-photon state 1/2(∣H〉∣V〉+∣V〉∣H〉),1/\sqrt{2}(|H〉|V〉+|V〉|H〉),1/2​(∣H〉∣V〉+∣V〉∣H〉), which is of much interest in the field of quantum information processing. Furthermore, we demonstrate the capability of this concept in respect of a generalization to entangle N-photon states for interferometry and lithography. This scheme requires single-photon sources, linear optical elements, and a multifold coincidence detection.