Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, SE-41296, Göteborg, Sweden.
Phys Rev Lett. 2012 Jun 29;108(26):263601. doi: 10.1103/PhysRevLett.108.263601. Epub 2012 Jun 26.
We have embedded an artificial atom, a superconducting transmon qubit, in a 1D open space and investigated the scattering properties of an incident microwave coherent state. By studying the statistics of the reflected and transmitted fields, we demonstrate that the scattered states can be nonclassical. In particular, by measuring the second-order correlation function, g((2)), we show photon antibunching in the reflected field and superbunching in the transmitted field. We also compare the elastically and inelastically scattered fields using both phase-sensitive and phase-insensitive measurements.
我们将一个人造原子，即超导转导量子比特，嵌入到一维开空间中，并研究了入射微波相干态的散射特性。通过研究反射和透射场的统计特性，我们证明了散射态可以是非经典的。具体来说，通过测量二阶相关函数$g((2))$，我们在反射场中观察到光子反聚束，而在透射场中观察到超聚束。我们还使用相敏和非相敏测量比较了弹性和非弹性散射场。
