Giant energy oscillations mediated by a quasiperiodically driven qubit
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-10-09 |
| Journal | Physical review. B./Physical review. B |
| Authors | Dominik Vuina, David M. Long, Philip J. D. Crowley, Anushya Chandran |
| Institutions | Boston University, Harvard University |
| Citations | 1 |
Abstract
Section titled āAbstractāA qubit driven by two incommensurate frequencies can mediate a quantized average energy current in the adiabatic limit. We show that nonadiabatic processes result in reversals of the energy current and corresponding oscillations in the net energy transferred between the drives. The oscillations are bounded but giant---much larger than the qubit energy splitting. A Landau-Zener analysis predicts that the timescale of the oscillations is exponentially large in the period of the drives. However, numerical analysis reveals that this timescale is not a monotonic function of the period and has increasing substructure as the adiabatic limit is approached. We show that this nonmonotonicity arises from interference effects between subsequent Landau-Zener transitions. Giant energy oscillations should be observable in near-term experiments with nitrogen-vacancy centers.