Title

Deterministic Generation Of Many-Photon Ghz States Using Quantum Dots In A Cavity

Keywords

Cavity QED; Entanglement; GHZ state

Abstract

Compared to classical light sources, quantum sources based on N00N states consisting of N photons achieve an N-times higher phase sensitivity, giving rise to super-resolution.1, 2, 3 N00N-state creation schemes based on linear optics and projective measurements only have a success probability p that decreases exponentially with N,4, 5, 6 e.g. p = 4.4x10-14for N = 20.7 Feed-forward improves the scaling but N fluctuates nondeterministically in each attempt.8, 9 Schemes based on parametric down-conversion suffer from low production efficiency and low fidelity. 9 A recent scheme based on atoms in a cavity combines deterministic time evolution, local unitary operations, and projective measurements. 10 Here we propose a novel scheme based on the off-resonant interaction of N photons with four semiconductor quantum dots (QDs) in a cavity to create GHZ states, also called polarization N00N states, deterministically with p = 1 and fidelity above 90% for N≤ 60, without the need of any projective measurement or local unitary operation. Using our measure we obtain maximum N-photon entanglement EN = 1 for arbitrary N. Our method paves the way to the miniaturization of N00N and GHZ-state sources to the nanoscale regime, with the possibility to integrate them on a computer chip based on semiconductor materials. © 2014 SPIE.

Publication Date

1-1-2014

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

9123

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2050905

Socpus ID

84906350577 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84906350577

This document is currently not available here.

Share

COinS