DC measurement of dressed states in a coupled 100~GHz resonator system using a single quasiparticle transistor as a sensitive microwave detector
| Autor: | Sergey V. Lotkhov, R. Dolata, M. Khabipov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Josephson effect Physics education.field_of_study Physics and Astronomy (miscellaneous) Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity Population FOS: Physical sciences Resonance 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Superconductivity (cond-mat.supr-con) Resonator Circuit quantum electrodynamics Qubit Condensed Matter::Superconductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Quasiparticle Atomic physics 0210 nano-technology education Quantum tunnelling |
| Popis: | We report on the on-chip detection of microwaves in the frequency range around 100GHz. For the purpose of detection, we employ a discrete transport channel triggered in a superconducting single-electron transistor by photon-assisted tunneling of quasiparticles. The technique is successfully applied to observe the spectrum of the dressed states of a model cQED system consisting of a superconducting coplanar resonator coupled to a quantum Josephson oscillator. The dressed states appear as typical resonance anticrossing exhibiting, in our case, an expectedly wide frequency splitting corresponding to the Jaynes-Cummings coupling strength, g/pi~10GHz. Due to the high decay rate, gamma~20-40GHz, in the very transparent Josephson junctions used, the strong coupling limit, g>>gamma, which is required for qubit operation, is not achieved, and the photon population in the resonator is low, ~1. Remarkably, the continuous readout of the low population states demonstrates the high microwave sensitivity of the detector. 4 pages, 3 figures Submitted to APL |
| Databáze: | OpenAIRE |
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