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Superconducting Qubits

Josephson directional amplifier for quantum measurement of superconducting circuits

arXiv
Authors: Baleegh Abdo, Katrina Sliwa, S. Shankar, Michael Hatridge, Luigi Frunzio, Robert Schoelkopf, Michel Devoret

Year

2013

Paper ID

31818

Status

Preprint

Abstract Read

~2 min

Abstract Words

84

Citations

N/A

Abstract

We have realized a microwave quantum-limited amplifier that is directional and can therefore function without the front circulator needed in many quantum measurements. The amplification takes place in only one direction between the input and output ports. Directionality is achieved by multi-pump parametric amplification combined with wave interference. We have verified the device noise performances by using it to readout a superconducting qubit and observed quantum jumps. With an improved version of this device, qubit and preamplifer could be integrated on the same chip.

Why This Paper Matters

  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
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  • We have realized a microwave quantum-limited amplifier that is directional and can therefore function without the front circulator needed in many quantum measurements.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1311.5345 [2] arXiv https://arxiv.org/abs/1311.5345 [3] Publisher https://arxiv.org/abs/1311.5345

Local Citation Graph (Related-Paper Links)

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