论文标题
宽带挤压微波和使用Josephson Traveling-Wave参数放大器放大
Broadband Squeezed Microwaves and Amplification with a Josephson Traveling-Wave Parametric Amplifier
论文作者
论文摘要
电磁真空的挤压是一种必需的计量技术，用于减少跨越重力波检测，生物学显微镜和量子信息科学的应用中的量子噪声。在超导电路中，基于谐振器的约瑟夫森 - 连接参数放大器通常用于生成挤压微波炉，受到狭窄的带宽和低动态范围的约束。在这项工作中，我们开发了一个双泵，宽带约瑟夫森旅行波参数放大器，该放大器结合了相敏感的灭绝比为56 dB的灭绝比与单模挤压量与最佳的基于谐振器的挤压器相同。我们还展示了在微波频率上以带宽在Gigahertz范围内的两种模式挤压，比现代谐振器挤压器的宽度几乎宽了两个数量级。我们的放大器能够同时创建具有较大频率分离的纠缠微波光子对，并具有潜在的应用，包括高保真乘以读数，量子照明和远程注射。
Squeezing of the electromagnetic vacuum is an essential metrological technique used to reduce quantum noise in applications spanning gravitational wave detection, biological microscopy, and quantum information science. In superconducting circuits, the resonator-based Josephson-junction parametric amplifiers conventionally used to generate squeezed microwaves are constrained by a narrow bandwidth and low dynamic range. In this work, we develop a dual-pump, broadband Josephson traveling-wave parametric amplifier that combines a phase-sensitive extinction ratio of 56 dB with single-mode squeezing on par with the best resonator-based squeezers. We also demonstrate two-mode squeezing at microwave frequencies with bandwidth in the gigahertz range that is almost two orders of magnitude wider than that of contemporary resonator-based squeezers. Our amplifier is capable of simultaneously creating entangled microwave photon pairs with large frequency separation, with potential applications including high-fidelity qubit readout, quantum illumination and teleportation.
