Xiaoping Ma, Chenglong You, Sushovit Adhikari, Yongjian Gu, Omar S. Magaña-Loaiza, Jonathan P. Dowling, Hwang Lee
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引用次数: 0
Abstract
The Hanbury Brown and Twiss (HBT) interferometer was proposed to observe intensity correlations of starlight to measure a star’s angular diameter. As the intensity of light that reaches the detector from a star is very weak, one cannot usually get a workable signal-to-noise ratio. We propose an improved HBT interferometric scheme incorporating optical parametric amplifiers (OPA) into the system to amplify the correlation signal. Remarkably, for weak star light, the signal-to-noise ratio (SNR) in the new HBT interferometric scheme is much better than that of conventional HBT interferometer. Our work is valuable in measuring a star whose intensity at the detector is low and maybe also applicable in remote sensing and long-distance quantum imaging where the light passed through the object is weak after a long distance transmission.
提出了汉伯里-布朗-特维斯干涉仪(Hanbury Brown and Twiss, HBT)，用于观测恒星光的强度相关性，以测量恒星的角直径。由于从恒星到达探测器的光的强度非常弱，人们通常无法得到一个可行的信噪比。我们提出了一种改进的HBT干涉方案，在系统中加入光学参量放大器(OPA)来放大相关信号。值得注意的是，对于微弱的恒星光，新HBT干涉方案的信噪比(SNR)明显优于传统的HBT干涉仪。我们的工作对于测量在探测器处强度较低的恒星是有价值的，也可能适用于通过物体的光经过长距离传输后较弱的遥感和远距离量子成像。
期刊介绍：
Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics.
EPJ Quantum Technology covers theoretical and experimental advances in subjects including but not limited to the following:
Quantum measurement, metrology and lithography
Quantum complex systems, networks and cellular automata
Quantum electromechanical systems
Quantum optomechanical systems
Quantum machines, engineering and nanorobotics
Quantum control theory
Quantum information, communication and computation
Quantum thermodynamics
Quantum metamaterials
The effect of Casimir forces on micro- and nano-electromechanical systems
Quantum biology
Quantum sensing
Hybrid quantum systems
Quantum simulations.
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