Scalable designs for quasiparticle-poisoning-protected topological quantum computation with Majorana zero modes
Creators
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1.
Microsoft (United States)
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2.
University of California, Santa Barbara
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3.
California Institute of Technology
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4.
University of Copenhagen
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Heinrich Heine University Düsseldorf
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6.
Weizmann Institute of Science
Abstract
We present designs for scalable quantum computers composed of qubits encoded in aggregates of four or more Majorana zero modes, realized at the ends of topological superconducting wire segments that are assembled into superconducting islands with significant charging energy. Quantum information can be manipulated according to a measurement-only protocol, which is facilitated by tunable couplings between Majorana zero modes and nearby semiconductor quantum dots. Our proposed architecture designs have the following principal virtues: (1) the magnetic field can be aligned in the direction of all of the topological superconducting wires since they are all parallel; (2) topological T junctions are not used, obviating possible difficulties in their fabrication and utilization; (3) quasiparticle poisoning is abated by the charging energy; (4) Clifford operations are executed by a relatively standard measurement: detection of corrections to quantum dot energy, charge, or differential capacitance induced by quantum fluctuations; (5) it is compatible with strategies for producing good approximate magic states.
Additional Information
© 2017 American Physical Society. Received 24 October 2016; published 21 June 2017. It is a pleasure to acknowledge inspiring conversations with A. Akhmerov, A. Altland, D. Clarke, M. Deng, R. Egger, J. Folk, L. Kouwenhoven, D. Sabonis, E. Sela, S. Vaitiekenas, and D. Wecker. We acknowledge the Aspen Center for Physics, where parts of this work where performed and which is supported by National Science Foundation Grant No. PHY-1066293. J.A. gratefully acknowledges support from the National Science Foundation through Grant No. DMR-1341822; the Caltech Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation through Grant No. GBMF1250; and the Walter Burke Institute for Theoretical Physics at Caltech. C.K. acknowledges support by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE 1144085. Y.O. acknowledges support by the Israel Science Foundation (ISF), Deutsche Forschungsgemeinschaft (Bonn) within the network CRC TR 183, and the European Research Council under the European Community's Seventh Framework Program (Program No. FP7/2007-2013)/ERC Grant Agreement No. 340210. K.F. and S.P. acknowledge funding by the Danish National Research Foundation and from the Deutsche Forschungsgemeinschaft (Bonn) within the network CRC TR 183. C.M.M. thanks the Danish National Research Foundation and Villum Foundation for support.Attached Files
Published - PhysRevB.95.235305.pdf
Submitted - 1610.05289.pdf
Files
1610.05289.pdf
Additional details
Identifiers
- Eprint ID
- 78407
- Resolver ID
- CaltechAUTHORS:20170621-103050950
Related works
- Describes
- https://physics.aps.org/articles/v10/68 (URL)
Funding
- NSF
- PHY-1066293
- NSF
- DMR-1341822
- Institute for Quantum Information and Matter (IQIM)
- NSF Physics Frontiers Center
- Gordon and Betty Moore Foundation
- GBMF1250
- Walter Burke Institute for Theoretical Physics, Caltech
- NSF Graduate Research Fellowship
- DGE-1144085
- Israel Science Foundation
- Deutsche Forschungsgemeinschaft (DFG)
- CRC TR 183
- European Research Council (ERC)
- 340210
- Danish National Research Foundation
- Villum Foundation
Dates
- Created
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2017-06-21Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field