Quantum emulation of coherent backscattering in a system of superconducting qubits
| Autor: | 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. |
|---|---|
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Phys. Rev. Applied 14, 014047 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.14.014047 |
| Popis: | 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 (UCF). Here we use multi-pass Landau-Zener transitions at the avoided crossing of a highly-coherent superconducting qubit to emulate these phenomena. The average and standard deviation of the qubit transition rate exhibit a dip and peak when the driving waveform is time-reversal symmetric, analogous to WL and UCF, respectively. The higher coherence of this qubit enabled the realization of both effects, in contrast to earlier work arXiv:1204.6428, which successfully emulated UCF, but did not observe WL. This demonstration illustrates the use of non-adiabatic control to implement quantum emulation with superconducting qubits. Comment: 14 pages, 7 figures; two reference added; figure 4 changed; 2 more figures added in Suppl. Info |
| Databáze: | arXiv |
| Externí odkaz: |
|