Quantifying the effects of dissipation and temperature on dynamics of a
superconducting qubit-cavity system
- URL: http://arxiv.org/abs/2207.04619v1
- Date: Mon, 11 Jul 2022 04:44:28 GMT
- Title: Quantifying the effects of dissipation and temperature on dynamics of a
superconducting qubit-cavity system
- Authors: Prashant Shukla
- Abstract summary: superconducting circuits involving Josephson junction offer macroscopic quantum two-level system (qubit)
We study the dynamics of superconducting qubits coupled to a cavity with including dissipation in a subkelvin temperature domain.
- Score: 0.6091702876917281
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The superconducting circuits involving Josephson junction offer macroscopic
quantum two-level system (qubit) which are coupled to cavity resonators and are
operated via microwave signals. In this work, we study the dynamics of
superconducting qubits coupled to a cavity with including dissipation in a
subkelvin temperature domain. In the first step, a classical Finite Element
Method is used to simulate the cavities and basic circuit elements to model
Josephson junctions. Then the quantization of the circuit is done to obtain the
full Hamiltonian of the system using energy partition ratios of the junctions.
Once the parameters of Hamiltonian are obtained, the dynamics is studied via
Lindblad equation for an open quantum system using a realistic set of
dissipative parameters and include temperature effects. Finally, we get
frequency spectra and/or dynamics of the system with time which have quantum
imprints. Such devices work at tens of milli Kelvins and we search for a set of
parameters which could enable to observe quantum behaviour at temperatures as
high as 1 K.
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