We present a scheme of quantum state truncation in the Fock basis (quantum scissors), based on combined action nondegenerate optical parametric amplifier and beamsplitter. Differently from previously proposed linear-optics-based scissors devices, which depend reliable states sources, our requires only readily available Gaussian states, such as coherent inputs (vacuum included). A truncated is g...

Interference fringes are registered by detectors. All detectors absorb energy from a single or multiple superposed fields through the process of “square modulus” of the sum of the complex amplitudes. The detected energy becomes proportional to the total relative phase difference for all the superposed fields. The process creates ambiguity in discerning the effects due to frequency and phase mod...

In this paper, a novel polarization splitter has been designed at the telecommunication wavelength of 1500 nm successfully based on the dielectric metasurface consisting of a silicon nanobrick array, which can generate two different wavefronts for two orthogonal input polarizations with well over 90% transmitted efficiency by exactly selecting the sizes of the used nanobricks. The splitting mec...

Here we introduce interferometric devices by combining optical feedback (cavities) with unbiased multiports, which, unlike traditional beam dividers, allow light to reflect back out of the port from which it originated. By replacing traditional, directionally biased beam-splitter in a Michelson interferometer an multiport, functional dependence scattering amplitudes changes. As result, derivati...

We propose a method to build quantum memristors in quantum photonic platforms. We firstly design an effective beam splitter, which is tunable in real-time, by means of a Mach-Zehnder-type array with two equal 50:50 beam splitters and a tunable retarder, which allows us to control its reflectivity. Then, we show that this tunable beam splitter, when equipped with weak measurements and classical ...

Quantum reflection of an atomic wave from a solid surface is caused by the attractive van der Waals force acting on the atom near the surface. The researchers had previously verified the quantum reflection of a cold neon atomic beam from a silicon surface. In this research they demonstrate the first known reflective atom-optical elements that use natural interaction of a solid surface, or attra...

Superconducting circuits provide an attractive architecture for quantum optics experiments in solid state systems. Microwave radiation interacts strongly with individual (macroscopic) quantum systems, and enables to realize emitters of single photons. The statistical property of emitting exactly a single photon as information carrier makes these emitters relevant for quantum communication and i...

Here, we present an analysis and interpretation of the experiment performed by Jacques et al. (2007 Science 315 966), which represents a realization of Wheeler’s delayed-choice Gedankenexperiment. Our analysis is based on the evolution of the photon state, since the photon enters into the Mach-Zehnder interferometer with a removable beam-splitter until it exits. Given the same incident photon s...

Precision positioning and control are critical to industrial-use processing machines. In order to have components fabricated with excellent precision, the measurement of small-angle variations must be as accurate as possible. To achieve this goal, this study provides a new and simple optical mechanism by varying light intensity. A He-Ne laser beam was passed through an attenuator and into a bea...

We provide a measurement protocol to estimate 2- and 4-point fermionic correlations in ultra-cold atom experiments. Our approach is based on combining random atomic beam splitter operations, which can be realized with programmable optical landscapes, high-resolution imaging systems such as quantum gas microscopes. illustrate our results the context of variational eigensolver algorithm for solvi...