Development of a Superconducting Hybrid Optomechanical System

Abstract

We incorporate a fast-flux line for a frequency tunable transmon qubit in 3D cavity architecture. We investigate the flux-dependent dynamic range, relaxation from unconfined states, and the bandwidth of the flux-line. Using time-domain measurements, we probe transmon's relaxation from higher energy levels after populating the cavity with ~ 2.1x104 photons. For the device used in the experiment, we find a resurgence time corresponding to the recovery of coherence to be 4.8 us. We use a fast-flux line to tune the qubit frequency and demonstrate the swap of a single excitation between cavity and qubit mode in 3 ns. It is an order of magnitude better than the promised deliverable. By measuring the deviation in the transferred population from the theoretical prediction, we estimate the bandwidth of the flux line to be ~100 MHz, limited by the parasitic effect in the design.

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Document Details

Document Type
Technical Report
Publication Date
Jan 17, 2024
Accession Number
AD1228977

Entities

People

  • Vibhor Singh

Organizations

  • Indian Institute of Science, Bengaluru

Tags

Fields of Study

  • Physics

Readers

  • Integrated Circuit Design and Technology.
  • Mechanical Engineering/Mechanics of Materials.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Quantum Science - Quantum Dots