Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session C28: Topological Quantum Information with Majorana Nanowires
2:30 PM–5:30 PM,
Monday, March 4, 2019
BCEC
Room: 161
Sponsoring
Unit:
DQI
Chair: Angela Kou, Yale Univ
Abstract: C28.00011 : Rapid single-shot detection of coherent tunneling in an InAs nanowire double quantum dot through dispersive gate sensing
4:30 PM–4:42 PM
Presenter:
Damaz De Jong
(Delft University of Technology)
Authors:
Damaz De Jong
(Delft University of Technology)
Jasper Van Veen
(Delft University of Technology)
Luca Binci
(Delft University of Technology)
Amrita Singh
(Delft University of Technology)
Jesper Nygård
(Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen)
Peter Krogstrup
(Center for Quantum Devices and Microsoft Quantum Lab Copenhagen, Niels Bohr Institute, University of Copenhagen)
Leo P Kouwenhoven
(Microsoft Station Q Delft, Delft University of Technology)
Wolfgang Pfaff
(Microsoft Station Q Delft, Delft University of Technology)
John Watson
(Microsoft Station Q Delft, Delft University of Technology)
Here we demonstrate rapid detection of single-electron tunneling between InAs nanowire quantum dots. To this end we have engineered a sensitive dispersive detection circuit by connecting a microwave resonator to a high-lever arm gate. This circuit translates charge tunneling between the dots into a dispersive shift on the resonator [3]. At charge degeneracy the phase shift of a reflected probe signal approaches its maximal possible value of 180 degrees, enabled by the large dot-resonator coupling. This allows us to detect the charge tunneling amplitude with an SNR exceeding two in a microsecond [4]. Our result paves the way for fast high-fidelity measurements of fermion parity in topological qubits.
[1] Plugge et al., NJP 19, 012001 (2017)
[2] Karzig et al., PRB 95, 235305 (2017)
[3] Blais et al., PRA 69, 062320 (2004)
[4] De Jong et al., in prep.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700