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Escape of a Driven Quantum Josephson Circuit into Unconfined States
- Source :
- Physical Review Applied, Physical Review Applied, American Physical Society, 2019, 11 (1), pp.014030. ⟨10.1103/PhysRevApplied.11.014030⟩, Physical Review Applied, 2019, 11 (1), pp.014030. ⟨10.1103/PhysRevApplied.11.014030⟩
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- International audience; Josephson circuits have been ideal systems with which to study complex nonlinear dynamics that can lead to chaotic behavior and instabilities. More recently, Josephson circuits in the quantum regime, particularly in the presence of microwave drives, have demonstrated their ability to emulate a variety of Hamiltonians that are useful for the processing of quantum information. In this paper, we show that these drives lead to an instability that results in the escape of the circuit mode into states that are not confined by the Josephson cosine potential. We observe this escape in a ubiquitous circuit: a transmon embedded in a 3D cavity. When the transmon occupies these free-particle-like states, the circuit behaves as though the junction had been removed and all nonlinearities are lost. This work deepens our understanding of strongly driven Josephson circuits, which is important for fundamental and application perspectives, such as the engineering of Hamiltonians by parametric pumping.
- Subjects :
- Physics
Chaotic
General Physics and Astronomy
02 engineering and technology
Transmon
021001 nanoscience & nanotechnology
01 natural sciences
Instability
Nonlinear system
[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph]
Quantum mechanics
Condensed Matter::Superconductivity
0103 physical sciences
Quantum information
010306 general physics
0210 nano-technology
Quantum
Microwave
Electronic circuit
Subjects
Details
- Language :
- English
- ISSN :
- 23317019
- Database :
- OpenAIRE
- Journal :
- Physical Review Applied, Physical Review Applied, American Physical Society, 2019, 11 (1), pp.014030. ⟨10.1103/PhysRevApplied.11.014030⟩, Physical Review Applied, 2019, 11 (1), pp.014030. ⟨10.1103/PhysRevApplied.11.014030⟩
- Accession number :
- edsair.doi.dedup.....80bd3435fc97f404f47a98c8420c8918