论文标题
双谐波动力电感检测器,用于在信号和1/f频率噪声之间区分区别
Dual-Resonator Kinetic-Inductance Detector for Distinction between Signal and 1/f Frequency Noise
论文作者
论文摘要
与量子信息设备相似的天文动力学电感探测器(儿童),经历了材料噪声的性能限制。特别是,1/f(频率)噪声可以是主要的噪声机制,这是由电路介电和材料接口中的两级系统缺陷(TLSS)引起的。在这里,我们提出了一个双谐光子KID(Durkid),该KID(Durkid)相对于1/f-noise Limited Kids而设计,旨在改善对噪声(或噪声等效功率)的信号。我们首先展示了硬化的示意图,制造的电路,然后遵循对预期操作,首次测量,理论和讨论的描述。该电路由两个共有4个电容器的电容桥的超导谐振器组成,每个电容器都托有TLSS。该设备的目的是使用模式的杂交来操作,这会导致TLSS将夫妇耦合到一种模式或另一种模式,具体取决于它们所居住的电容器。相比之下,预期的KID信号针对电感器,并且由于杂交导致杂交导致两者(杂交)模式的频率变化。因此,可以将光子信号与TLS频率噪声区分开。为了实现杂交,锡电感器当前有偏置,以使一个裸共振模式与另一个裸共振模式调整为退化,并且测量结果表明,预期的频率调谐和杂交如预期。在测量中,也表征了2个谐振器与传输线的谐振器耦合和无意的耦合。在理论中,基于量子信息科学模式,我们计算4端口S参数并模拟设备的1/F频率噪声。该研究表明,在1/f-noise限制的儿童探测器上,硬皮德可以表现出较大且基本的性能优势。
Astronomical Kinetic Inductance Detectors (KIDs), similar to quantum information devices, experience performance limiting noise from materials. In particular, 1/f (frequency) noise can be a dominant noise mechanism, which arises from Two-Level System defects (TLSs) in the circuit dielectrics and material interfaces. Here we present a Dual-Resonator KID (DuRKID), which is designed for improved signal to noise (or noise equivalent power) relative to 1/f-noise limited KIDs. We first show the DuRKID schematic, fabricated circuit, and we follow with a description of the intended operation, first measurements, theory, and discussion. The circuit consists of two superconducting resonators sharing an electrical capacitance bridge of 4 capacitors, each of which hosts TLSs. The device is intended to operate using hybridization of the modes, which causes TLSs to either couple to one mode or the other, depending upon which capacitor they reside in. In contrast, the intended KID signal is directed to an inductor, and due to hybridization this causes correlated frequency changes in both (hybridized) modes. Therefore, one can distinguish photon signal from TLS frequency noise. To achieve hybridization, a TiN inductor is current biased to allow tuning of one bare resonator mode into degeneracy with the other and measurements show that the intended resonator modes frequency tune and hybridize as expected. The interresonator coupling and unintentional coupling of the 2 resonators to transmission lines are also characterized in measurements. In the theory, based on a quantum-information-science modes, we calculate the 4-port S parameters and simulate the 1/f frequency noise of the device. The study reveals that the DuRKID can exhibit a large and fundamental performance advantage over 1/f-noise-limited KID detectors.