Quantum Emulation of Coherent Backscattering in a System of Superconducting Qubits
Year: 2020
Type: article
Abstract: 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.
Authors: 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, Oliver, William D
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Office of the Director of National Intelligence, Comisión Nacional de Energía Atómica, Gobierno de Argentina, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Cuyo, Intelligence Advanced Research Projects Activity, Agencia Nacional de Promoción Científica y Tecnológica
OpenAlex ID: W3098631217