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Universal quantum computation in waveguide QED using decoherence free subspaces

Paulisch, V. and Kimble, H. J. and González-Tudela, A. (2016) Universal quantum computation in waveguide QED using decoherence free subspaces. New Journal of Physics, 18 (4). Art. No. 043041. ISSN 1367-2630. http://resolver.caltech.edu/CaltechAUTHORS:20160601-101048231

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Abstract

The interaction of quantum emitters with one-dimensional photon-like reservoirs induces strong and long-range dissipative couplings that give rise to the emergence of the so-called decoherence free subspaces (DFSs) which are decoupled from dissipation. When introducing weak perturbations on the emitters, e.g., driving, the strong collective dissipation enforces an effective coherent evolution within the DFS. In this work, we show explicitly how by introducing single-site resolved drivings, we can use the effective dynamics within the DFS to design a universal set of one and two-qubit gates within the DFS of an ensemble of two-level atom-like systems. Using Liouvillian perturbation theory we calculate the scaling with the relevant figures of merit of the systems, such as the Purcell factor and imperfect control of the drivings. Finally, we compare our results with previous proposals using atomic Λ systems in leaky cavities.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/1367-2630/18/4/043041DOIArticle
http://iopscience.iop.org/article/10.1088/1367-2630/18/4/043041/metaPublisherArticle
http://arxiv.org/abs/1512.04803arXivDiscussion Paper
Additional Information:© 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 17 December 2015; Revised 29 March 2016; Accepted for publication 30 March 2016; Published 28 April 2016. We gratefully acknowledge discussions with Ignacio Cirac. The work of AGT and VP was funded by the European Union integrated project Simulators and Interfaces with Quantum Systems (SIQS). AGT also acknowledges support from Alexander Von Humboldt Foundation and Intra-European Marie-Curie Fellowship NanoQuIS (625955). HJK acknowledges funding by the Institute of Quantum Information and Matter, a National Science Fundation (NSF) Physics Frontier Center with support of the Moore Foundation, by the Air Force Office of Scientific Research, Quantum Memories in Photon-Atomic-Solid State Systems (QuMPASS) Multidisciplinary University Research Initiative (MURI), by the Department of Defense National Security Science and Engineering Faculty Fellows (DoD NSSEFF) program, by NSF PHY1205729 and support as a Max Planck Institute for Quantum Optics Distinguished Scholar.
Group:IQIM, Institute for Quantum Information and Matter
Funders:
Funding AgencyGrant Number
European UnionUNSPECIFIED
Alexander Von Humboldt FoundationUNSPECIFIED
Intra-European Fellowship NanoQuIS625955
Institute of Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Department of Defense National Security Science and Engineering Faculty FellowshipUNSPECIFIED
NSFPHY-1205729
Max Planck InstituteUNSPECIFIED
Subject Keywords:quantum computation, waveguide QED, dissipative assisted gates, atom nanophotonics
Record Number:CaltechAUTHORS:20160601-101048231
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160601-101048231
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67534
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Jun 2016 20:14
Last Modified:11 May 2017 19:17

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