We study a double-cavity optomechanical system in which movable mirror with perfect reflection is inserted between two fixed mirrors partial transmission. This driven from both end symmetric scheme by strong coupling fields and weak probe fields. find that three interesting phenomena: coherent absorption (CPA), transmission (CPT), synthesis (CPS) can be attained within different parameter regimes. That is, we make input totally absorbed the without yielding any energy output either (CPA); an...

We present an improved superatom model for examining nonlinear optical responses of cold Rydberg atoms in the regime electromagnetically induced transparency (EIT). By going beyond weak-probe approximation, we find that several higher-order collective states should be included to correctly describe coherent excitation superatoms. Otherwise, numerical results based on simple ladder system superatoms will contribute wrong predictions light intensity and photon correlation transmitted probe...

Output entanglement is a key element in quantum information processing.Here, we show how to obtain optimal between two filtered output fields threemode optomechanical system.First, the analytical expression of time delay fields, from which can coupling for without delay.In this case, our linearized analysis predicts that saturates an value as increased.Furthermore, with delay.These results should be very helpful conceiving new schemes processing their efficiency depending critically on...

We study the optical response of cold rubidium atoms driven into four-level Y configuration exhibiting two high Rydberg levels in regime electromagnetically induced transparency (EIT). Atoms excited to either level interact with each other just via self-blockade potentials (I) or also cross blockade (II). Numerical results show a few interesting quantum phenomena on transmitted properties weak probe field owing controlled single and double blockade. In case (I), it is viable switch between...

High-density Cs2AgBiBr6 films with uniform grains were prepared by a simple one-step and low-temperature sol-gel method on indium tin oxide (ITO) substrates. An explicit tristate bipolar resistance switching behavior was observed in the Pt/Cs2 AgBiBr6/ITO/glass devices under irradiation of 10 mW/cm2 (445 nm). This stable over 1200 s. The maximum ratio high low states about 500. Based analysis electric properties, valence variation absorption spectra, resistive characteristics attributed to...

We study the adiabatic passage for a pair of interacting cold atoms driven into ladder configuration with one ground state and two Rydberg states. find, proper single-photon two-photon detunings, that it is viable to (i) achieve efficient population transfer from either by fully overcoming dipole blockade effect (ii) implement maximal entangled states partially effect. These atomic are very stable have purities fidelities approaching 100%, among which particular interest since involves...

Utilizing dipole blockade of Rydberg excitations, we study an ensemble stationary atoms driven into the four-level N configuration for achieving a new kind electromagnetically induced grating in presence traveling-wave and standing-wave classical control fields. This shows cooperative optical nonlinearities as manifested by sensitivity output diffraction patterns to input light intensities (photon correlations) quantum probe field, promising then essential opportunity distinguishing weaker...

We investigate a long-range interaction between $64D_{5/2}$ Rydberg-atom pairs and antiblockade effect employing two-color excitation scheme. The first color (pulse A) is set to resonantly excite the Rydberg transition prepare few seed atoms, which establish blockade region due strong pairs. second B) blue detuned relative enables further of atoms by counteracting effect. It found that lead huge difference with pulse B. dynamic evolution varying pulse-B duration at 30-MHz detuning also...

We study a five-level $\text{quasi}\ensuremath{-}\ensuremath{\Lambda}$ system of cold atoms for achieving high-order photonic band gaps (PBGs) probed by an ultraviolet field in two cases where either infrared or visible control works the standing-wave configuration to induce one atomic grating. Transfer-matrix calculations appropriate rubidium levels demonstrate that three fifth-order second-order can be generated near probe resonance when is modulated satisfy relevant Bragg conditions...

Asymmetric reflection in Bragg gratings and asymmetric diffraction are both linked to parity-time (PT) symmetry non-Hermitian optics, but their direct relation has not been examined. To fill this gap, we first consider a PT-symmetric sinusoidal grating compare the contrast of forward backward reflectivities ratio ±1-order efficiencies. Analytical numerical results show that they change with identical tendencies peaks at same positions wide parameter space, indicating thus an intrinsic link...

We investigate the storage and retrieval of a multiphoton probe field in cold Rydberg atoms with an effective method based on superatom model. This is found greatly attenuated light intensity two-photon correlation yet suffering little temporal broadening as result partial dipole blockade excitation. In particular, output energy exhibits intriguing saturation effect against input accompanied by inhomogeneous nonclassical antibunching feature manifestation dynamic cooperative optical...

We study the optical response of a double optomechanical cavity system assisted by two Rydberg atoms. The target atom is only coupled with one side single mode, and gate outside cavities. It has been realized that long-range manipulation properties hybrid system, controlling decoupled cavity. Switching on coupling between atoms original spatial inversion symmetry structure broken. Combining controllable non-reciprocity coherent perfect absorption/transmission/synthesis effect (CPA/CPT/CPS...

Abstract Nonreciprocal devices are indispensable for building quantum networks and ubiquitous in modern communication technology. Here, we study perfect optical nonreciprocity a three-mode optomechanical system with mechanical driving. The scheme relies on the interference between interaction We find can be achieved even though nonreciprocal phase difference is zero if drive by driving nonzero phase. obtain essential conditions analyze properties of transmission. These results used to...

We investigate the stationary entanglement properties in a hybrid system consisting of an optical cavity, mechanical resonator, charged object, and atomic ensemble. Numerical results show that this exhibits three kinds controllable bipartite entanglements experimentally accessible parameter regime with help object. More importantly, it is viable to enhance on demand each at expense reducing others by modulating Coulomb coupling strength. Last but not least, these seem more robust against...

We study the steady optical responses of a cold atomic ensemble driven into three-level ladder configuration involving Rydberg state at finite temperatures. By improving superatom model with thermal movement included, we calculate relevant coherence effects and find that residual Doppler broadening mK–K temperatures will weaken nonclassical properties transmitted probe photons. Furthermore, propagation directions coupling fields have great influence on various related to electromagnetically...

We propose a theoretical scheme for dipole exchange-induced grating (DEIG) based on hybrid system consisting of ultra-cold Rubidium ($^{87}$Rb) atomic ensemble and movable Rydberg spin atoms. The optical response the appears as superposition three- four-level configurations, similar to cooperative nonlinear effect caused by blockade effect. However, such uniquely responds spatial positions atoms, offering novel approach dynamically control electromagnetically induced gratings (EIG) except...

We propose a theoretical scheme for dipole exchange-induced grating (DEIG) based on hybrid coherent atomic system. The system consists of an ultra-cold rubidium (

Dense and flat La[Formula: see text]NiFeO[Formula: text] (LNFO) films were fabricated on the indium tin oxide-coated glass (ITO/glass) substrate by sol-gel method. The bipolar resistive switching behavior (BRS) could be maintained in 100 cycles remained after 30 days, indicating that LNFO-based RS device owned good memory stability. Surprisingly, multilevel characteristics firstly observed Au/LNFO/ITO/glass device. high resistance states (HRSs) low state (LRS) with maximum ratio of [Formula:...