论文标题
量子限制放大而没有不稳定性
Quantum-limited amplification without instability
论文作者
论文摘要
量子参数放大器通常通过在动态不稳定点的接近度中生成。我们考虑了一种替代的一般策略，即实现量子限制的大量增益，而无需与动态不稳定性接近。我们的基本机制（涉及保守挤压光子数量的动力学）实现了各种一个和两个模式放大器的设计，这些放大器不受任何基本增益宽宽约束的限制。我们专注于一种特定的实现，该实现使我们能够在传输中实现理想的单模挤压操作，并且反射为零。我们对该系统进行了彻底的理论分析（包括泵进行效果），还讨论了实验性超导量子电路实施的结果。
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.
