Quantum Emulation of Coherent Backscattering in a System of Superconducting Qubits
Name
PhysRevApplied.14.014047.pdf
Description
Published version
Size
1.81 MB
Format
Adobe PDF
Checksum (MD5)
25604a9430000de72c3e20e61f13d5db
Author(s)
Gramajo, Ana Laura
Campbell, Dan
Kannan, Bharath
Kim, David K
Melville, Alexander
Niedzielski, Bethany M
Yoder, Jonilyn L
Sánchez, María José
Domínguez, Daniel
Gustavsson, Simon
Date Issued
2020
Journal
Physical Review Applied
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2020 American Physical Society. In condensed matter systems, coherent backscattering and quantum interference in the presence of time-reversal symmetry lead to well-known phenomena, such as weak localization (WL) and universal conductance fluctuations (UCFs). Here we use multipass Landau-Zener transitions at the avoided crossing of a highly coherent superconducting qubit to emulate these phenomena. The average and standard deviations of the qubit transition rate exhibit a dip and peak when the driving waveform is time-reversal symmetric, analogous to WL and UCFs, respectively. The higher coherence of this qubit enabled the realization of both effects, in contrast to the earlier work by Gustavsson et al. [Phys. Rev. Lett. 110, 016603 (2013)], who successfully emulated UCFs, but did not observe WL. This demonstration illustrates the use of nonadiabatic control to implement quantum emulation with superconducting qubits.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PHYSREVAPPLIED.14.014047
