Multiphoton dressing of an anharmonic superconducting many-level quantum circuit
Abstract
We report on the investigation of a superconducting anharmonic multilevel circuit that is coupled to a harmonic readout resonator. We observe multiphoton transitions via virtual energy levels of our system up to the fifth excited state. The back-action of these higher-order excitations on our readout device is analyzed quantitatively and demonstrated to be in accordance with theoretical expectation. By applying a strong microwave drive we achieve multiphoton dressing within our anharmonic circuit which is dynamically coupled by a weak probe tone. The emerging higher-order Rabi sidebands and associated Autler-Townes splittings involving up to five levels of the investigated anharmonic circuit are observed. Experimental results are in good agreement with master-equation simulations.
- Publication:
-
Physical Review B
- Pub Date:
- February 2015
- DOI:
- 10.1103/PhysRevB.91.054523
- arXiv:
- arXiv:1410.3383
- Bibcode:
- 2015PhRvB..91e4523B
- Keywords:
-
- 42.50.Hz;
- 32.80.Rm;
- 42.50.Ct;
- 85.25.Cp;
- Strong-field excitation of optical transitions in quantum systems;
- multiphoton processes;
- dynamic Stark shift;
- Multiphoton ionization and excitation to highly excited states;
- Quantum description of interaction of light and matter;
- related experiments;
- Josephson devices;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Superconductivity;
- Quantum Physics
- E-Print:
- 9 pages, 5 figures