eprintid: 264259
rev_number: 41
eprint_status: archive
userid: 608
dir: disk0/00/26/42/59
datestamp: 2010-12-01 10:35:07
lastmod: 2021-11-11 23:36:50
status_changed: 2010-12-01 10:35:07
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Kolli, A
creators_name: Lovett, BW
creators_name: Benjamin, SC
creators_name: Stace, TM
title: All-Optical Measurement Based QIP in Quantum Dots
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
note: © 2006 The American Physical Society
abstract: Parity measurements on qubits can generate the entanglement resource necessary for scalable quantum computation. Here we describe a method for fast optical parity measurements on electron spin qubits within coupled quantum dots. The measurement scheme, which can be realised with existing technology, consists of the optical excitation of excitonic states followed by monitored relaxation. Conditional on the observation of a photon, the system is projected into the odd/even parity subspaces. Our model incorporates all the primary sources of error, including detector inefficiency, effects of spatial separation and non-resonance of the dots, and also unwanted excitations. Through an analytical treatment we establish that the scheme is robust to such effects. Two applications are presented: a realisation of a CNOT gate, and a technique for growing large scale graph states.
date: 2006-12-22
official_url: http://dx.doi.org/10.1103/PhysRevLett.97.250504
vfaculties: VMPS
oa_status: green
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_source: arXiv
elements_id: 149134
doi: 10.1103/PhysRevLett.97.250504
lyricists_name: Kolli, Avinash
lyricists_id: AKOLL34
full_text_status: public
publication: Phys. Rev. Lett.
volume: 97
number: 25
article_number: 250504
issn: 0031-9007
citation:        Kolli, A;    Lovett, BW;    Benjamin, SC;    Stace, TM;      (2006)    All-Optical Measurement Based QIP in Quantum Dots.                   Phys. Rev. Lett. , 97  (25)    , Article 250504.  10.1103/PhysRevLett.97.250504 <https://doi.org/10.1103/PhysRevLett.97.250504>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/264259/1/264259.pdf