Generation of four-photon polarization entangled state based on EPR entanglers
Meiyu Wang, Fengli Yan
TL;DR
This paper presents a method to generate four-photon polarization entangled states using EPR entanglers, which involve linear optics, quantum non-demolition measurements, and feed-forward, achieving high success probability.
Contribution
The paper introduces a novel scheme for creating four-photon entangled states based on EPR entanglers with near-deterministic entanglement of polarization qubits.
Findings
High success probability of entanglement generation
Efficient construction of four-photon polarization entangled states
Dependence on EPR entangler efficiency
Abstract
We show how to prepare four-photon polarization entangled states based on some Einstein-Podolsky-Rosen (EPR) entanglers. An EPR entangler consists of two single photons, linear optics elements, quantum non-demolition measurement using a weak cross-Kerr nonlinearity, and classical feed forward. This entangler which acts as the most primary part in the construction of our scheme allows us to make two separable polarization qubits entangled near deterministically. Therefore, the efficiency of the present device completely depends on that of EPR entanglers, and it has a high success probability.
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