Quantum-limited amplification without instability
Abstract
Quantum parametric amplifiers typically generate by operating in proximity to a point of dynamical instability. We consider an alternate general strategy where quantum-limited, large-gain amplification is achieved without any proximity to a dynamical instability. Our basic mechanism (involving dynamics that conserves the number of squeezed photons) enables the design of a variety of one and two mode amplifiers that are not limited by any fundamental gain-bandwidth constraint. We focus on a particular realization that allows us to realize an ideal single-mode squeezing operation in transmission, and which has zero reflection. We present both a thorough theoretical analysis of this system (including pump-depletion effects), and also discuss results of an experimental superconducting quantum circuit implementation.
Cite
@article{arxiv.2208.00024,
title = {Quantum-limited amplification without instability},
author = {A. Metelmann and O. Lanes and T-Z. Chien and A. McDonald and I. Tsiamis and M. Hatridge and A. A. Clerk},
journal= {arXiv preprint arXiv:2208.00024},
year = {2025}
}
Comments
14 pages, 9 figures, this version: new Appendix D on nonreciprocal Bogoliubov amplifier, extended Appendix B, added author, minor adjustments to main text