Deterministic Generation of Large-Scale Entangled Photonic Cluster State from Interacting Solid State Emitters

Mercedes Gimeno-Segovia, Terry Rudolph, and Sophia E. Economou

Phys. Rev. Lett. 123, 070501 – Published 12 August 2019

Abstract

The ability to create large highly entangled “cluster” states is crucial for measurement-based quantum computing. We show that deterministic multiphoton entanglement can be created from coupled solid state quantum emitters without the need for any two-qubit gates and regardless of whether the emitters are identical. In particular, we present a general method for controlled entanglement creation by making direct use of the always-on exchange interaction, in combination with single-qubit operations. This is used to provide a recipe for the generation of two-dimensional, cluster-state entangled photons that can be carried out with existing experimental capabilities in quantum dots.

Received 8 January 2018

DOI:https://doi.org/10.1103/PhysRevLett.123.070501

Physics Subject Headings (PhySH)

Entanglement production Optical quantum information processing Quantum computation Quantum information with solid state qubits

Quantum dots

Condensed Matter, Materials & Applied PhysicsQuantum Information, Science & Technology

Authors & Affiliations

Mercedes Gimeno-Segovia^1,2, Terry Rudolph², and Sophia E. Economou^3,*

¹Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, BS8 1FD, United Kingdom
²Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom
³Department of Physics, Virginia Tech, Blacksburg Virginia 24061, USA