Quantum-limited amplification and entanglement in coupled nonlinear resonators

Salathe Y, Mlynek J, Schmidt S, Wallraff AJ, Eichler C (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Physical Review Letters American Physical Society

Book Volume: 113

Article Number: 110502

Journal Issue: 11

DOI: 10.1103/PhysRevLett.113.110502

Abstract

We demonstrate a coupled cavity realization of a Bose-Hubbard dimer to achieve quantum-limited amplification and to generate frequency entangled microwave fields with squeezing parameters well below -12dB. In contrast to previous implementations of parametric amplifiers, our dimer can be operated both as a degenerate and as a nondegenerate amplifier. The large measured gain-bandwidth product of more than 250 MHz for the nondegenerate operation and the saturation at input photon numbers as high as 2000 per μs are both expected to be improvable even further, while maintaining wide frequency tunability of about 2 GHz. Featuring flexible control over all relevant system parameters, the presented Bose-Hubbard dimer based on lumped element circuits has significant potential as an elementary cell in nonlinear cavity arrays for quantum simulations.

Authors with CRIS profile

Christopher Eichler

Involved external institutions

Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich CH Switzerland (CH)

How to cite

APA:

Salathe, Y., Mlynek, J., Schmidt, S., Wallraff, A.J., & Eichler, C. (2014). Quantum-limited amplification and entanglement in coupled nonlinear resonators. Physical Review Letters, 113(11). https://doi.org/10.1103/PhysRevLett.113.110502

MLA:

Salathe, Y., et al. "Quantum-limited amplification and entanglement in coupled nonlinear resonators." Physical Review Letters 113.11 (2014).

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