A few decades ago, quantum optics stood out as a new domain of physics by exhibiting
states of light with no classical equivalent. The first investigations concerned single photons …

Two-particle interference is a fundamental feature of quantum mechanics, and is even less
intuitive than wave–particle duality for a single particle. In this duality, classical concepts …

Entanglement between large numbers of quantum modes is the quintessential resource for
future technologies such as the quantum internet. Conventionally, the generation of …

Multimode Gaussian quantum light, which includes multimode squeezed and multipartite
quadrature entangled light, is a very general and powerful quantum resource with promising …

A scheme is proposed to realize high‐precision spatial measurement of laser beams
beyond quantum limit using a novel quantum state called the m th mth order spatially …

The spatial distribution of higher-order Hermite–Gaussian (HG) modes is more complicated
than the fundamental mode, and the characteristics of different modes and their orthogonal …

The squeezed state is important in quantum metrology and quantum information. The most
effective generation tool known is the optical parametric oscillator (OPO). Currently, only the …

The generation of continuous-variable multipartite entangled states is important for several
protocols of quantum information processing and communication, such as one-way quantum …

Spatial division multiplexing (SDM) by employing few-mode fiber or multi-core fiber is
expected to efficiently enhance the capacity of optical networks and overcome the …

Proposed near-future upgrades of the current advanced interferometric gravitational wave
detectors include the usage of frequency dependent squeezed light to reduce the current …