Integrated Josephson Parametric Amplifier Readout for Solid State Qubits

Abstract

We developed single-shot readout capability for superconducting qubits using dispersive measurements. The state of a quantum circuit is mapped unto the state of a resonant cavity which is then probed by microwave reflectometery. To maintain coherence, the cavity is weakly probed with only of order one microwave photon. Such a weak signal is detected by way of a superconducting parametric amplifier, developed with ARO support, which is nearly quantum limited in its noise performance. With this capability, we demonstrated several experimental milestones: high fidelity real time readout, active quantum feedback, and state tracking.

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Document Details

Document Type
Technical Report
Publication Date
Oct 13, 2014
Accession Number
ADA624973

Entities

People

  • Irfan Siddiqi

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Abstracts
  • Agreements
  • Amplifiers
  • Cavity Resonators
  • Department Of Defense
  • Engineering
  • Information Processing
  • Mathematics
  • Measurement
  • Microwaves
  • Parametric Amplifiers
  • Quantum Bits
  • Quantum Circuits
  • Quantum Information
  • Reliability
  • Resonators
  • Students

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Quantum Computing
  • Quantum Science - Quantum Dots