Quantum metrology is one of the most promising applications of quantum technologies. The
aim of this research field is the estimation of unknown parameters exploiting quantum …

Interference, which refers to the phenomenon associated with the superposition of waves,
has played a crucial role in the advancement of physics and finds a wide range of …

Quantum phenomena such as entanglement can improve fundamental limits on the
sensitivity of a measurement probe. In optical interferometry, a probe consisting of N …

摘要量子精密测量作为当代量子力学的主要应用方面之一, **些年来一直是量子科技的重要研究
和发展方向. 量子精密测量的主要研究目标是针对物理系统中的未知参数 …

The classical Wiener–Khinchin theorem (WKT), which can extract spectral information by
classical interferometers through Fourier transform, is a fundamental theorem used in many …

Hong-Ou-Mandel (HOM) interference of multi-mode frequency entangled states plays a
crucial role in quantum metrology. However, as the number of modes increases, the HOM …

We propose theoretically a quantum interferometer in which the NOON state interferometer
is combined with the Hong-Ou-Mandel interferometer. With this interferometer, the temporal …

A spectrally uncorrelated biphoton state generated from the spontaneous nonlinear optical
process is an important resource for quantum information. Currently, such a spectrally …

We identify a class of superposition spin coherent states that enable measurements with a
Heisenberg-limit (HL) precision. We demonstrate that a superposition of any two antipodal …

We demonstrate the operation of a coincidence photon detector with a short timing jitter
consisting of two superconducting nanowire single photon detectors (SSPDs) and a single …