Besides the rating information, an increasing number of modern recommender systems also allow users to add personalized tags items. Such tagging information may provide very useful for item recommendation, because users' interests in items can be implicitly reflected by that they often use. Although some content-based have made preliminary attempts recently utilize improve recommendation performance, few based on collaborative filtering (CF) employed help procedure. In this paper, we propose...

We investigate the two-photon scattering processes in a one-dimensional waveguide coupled to either two-level or three-level giant atom. By manipulating accumulated phase shift between two coupling points, we are able effectively modify characteristics of these processes. Utilizing Lippmann-Schwinger formalism, obtain exact interacting wave functions systems. Additionally, analytical expressions for incoherent power spectra and second-order correlations derived. The spectrum, which is...

We investigate the scattering processes of two photons in a one-dimensional waveguide coupled to giant atoms. By adjusting accumulated phase shifts between coupling points, we are able effectively manipulate characteristics these photons. Utilizing Lippmann-Schwinger formalism, derive analytical expressions for wave functions describing two-photon interaction separate, braided, and nested configurations. Based on functions, also obtain incoherent power spectra second-order correlation...

We investigate a hybrid quantum system combining cavity electrodynamics and optomechanics, where photon mode is coupled to four-level tripod atom mechanical via radiation pressure. find that within the single-photon optomechanics Lamb-Dicke limit, presence of alters optical properties field drastically, gives rise completely destructive interference effects in scattering. The heating rate can be dramatically suppressed utilizing involving atom, phonon, obtained result analogous resolved...

We investigate the generation of nonreciprocal single photons in chiral waveguide-cavity-emitter system. Due to chirality light-emitter interactions, left direction couple a cavity which induces only linear optical effects, while right cavity-emitter system can generate nonlinearity. In regime single-photon transmission, are absorbed by at resonance frequency, transmitted due Rabi splitting. two-photon linearity cannot produce photon-photon interactions and does not change statistics...

To investigate whether patients with primary open-angle glaucoma combined high myopia (POAG-HM) have short-term intraocular pressure (IOP) fluctuations at resting conditions over 24 hours and after dynamic exercise.Prospective Control Clinical Study. Eighty eyes of 80 high-tension Chinese POAG only on prostaglandin analog locally were categorized as per their degree (myopes 6 D or more, n=30 between -0.76 -5.99 D, n=29) without (n=21). Twenty-four-hour IOP observed in protocol 1, 10-minute...

In the paper we study nonlinear mechanical cooling processes in an intrinsic quadratically optomechanical coupling system without linearizing interaction. We apply scattering theory to calculate transition rates between different Fock states using resolvent of Hamiltonian, which allows for a direct identification underlying physical processes, where only even-phonon transitions are permitted and odd-phonon forbidden. verify feasibility approach by comparing steady-state mean phonon number...

We discuss the generation of strong stationary mechanical squeezing and entanglement in modulated two-and three-mode optomechanics. Following reservoir engineering scheme, beam-splitter parametric optomechanical interactions can be simultaneously achieved through appropriately choosing modulation frequency on motion, which is essential to entanglement. In two-mode optomechanics, tunable by relative ratio couplings, also robust thermal noise due optically induced cooling process. EPR-type...

We propose a cooling scheme for the V-type three-level atom tightly confined in harmonic trap. Two excited levels are coupled to ground state by quadrupole transition with small dissipation rate and dipole large rate, respectively. The is strongly driven running-wave laser 1, which acts as channel Lamb-Dicke regime. one weakly another 2 auxiliary transition. Ground-state can be achieved through appropriate choice of Rabi frequency 1 detuning

(1) To investigate the reference value of peak-trough difference in circadian rhythm intraocular pressure (IOP) habitual position and (2) to compare IOP parameters among 3 age groups.Habitual healthy subjects sampled from population Handan Eye Study was measured every 2 hours seated during light-wake period (7:30 AM, 9:30 11:30 1:30 PM, 3:30 5:30 7:30 PM) supine dark-sleep (11:30 AM). Blood heart rate were obtained subsequently at each measurement.Two hundred six included final analyses...

We propose a cooling scheme for trapped atom using the phenomenon of cavity-induced double electromagnetically induced transparency (EIT), where comprising four levels in tripod configuration is confined inside high-finesse optical cavity. By exploiting one EIT, which involves cavity photon and two laser photons, carrier transition can be eliminated due to quantum destructive interference excitation paths. Heating process originated from blue-sideband mediated by field also prohibited with...

We propose a ground-state cavity-mediated cooling scheme for trapped atom, which is in the $\ensuremath{\Lambda}$ configuration and confined inside high-finesse optical cavity, using standing-wave laser. The carrier transition can be prohibited by placing atom at node of cavity field, blue-sideband simultaneously eliminated exploiting quantum interference via tuning frequency As consequence, achieved. Moreover, we numerically demonstrate superiority antinode laser as compared with...

In this Letter, the frequency expansion of an orthogonally polarized dual-wavelength laser, based on cascaded stimulated Raman scattering, was demonstrated for first time, to best our knowledge. The fundamental laser generated from two separate Nd:YLF crystals free gain competition. Integrating benefit different peaks in KGd(WO4)2 (KGW) crystal, sets first-Stokes lasers were achieved by rotating crystal 90°. Furthermore, simply replacing output coupler, we attained another second-Stokes via...

Abstract Generation of strong stationary optical and mechanical squeezing is proposed for the linear‐and‐quadratic optomechanical system, where two cavity modes induce linear quadratic couplings, respectively. Through linearization treatment, linearized coupling between mode parametric amplification process are achievable controllable by independent driving lasers. Optical generated following different mechanisms. works in regime, would push system close to instability threshold, which could...

Abstract Correlated two‐photon scattering in a waveguide quantum electrodynamics system consisting of four‐level ‐type emitter (4LE) sidely coupled to one‐dimensional (1D) is studied. In the regime, eigenstates are constructed by imposing an open boundary condition and defining incident state as free plane wave, which includes photon–photon bound that passes through 4LE composite single particle. multilevel system, can be tuned interference generate controllable types interactions...

We investigate the force measurement sensitivity in a squeezed dissipative optomechanics within free-mass regime under influence of shot noise (SN) from photon number fluctuations, laser phase pump laser, thermal environment, and optical losses outcoupling detection inefficiencies. Generally, light could generate reduced SN on quadrature an enlarged quantum backaction (QBA) due to antisqueezed conjugate quadrature. With appropriate choice angle homodyne detection, QBA is cancellable, leading...

We study the nonreciprocal properties of transmitted photons in a chiral waveguide quantum electrodynamics (QED) system, including single- and two-photon transmissions second-order correlations. For single-photon transmission, nonreciprocity is induced by effects coupling atomic dissipation weak region. It vanishes strong regime when effect becomes ignorable. In case there exist two ways going through emitter: independently as plane waves formation bound state. Besides behavior waves, state...

We study the two-photon scattering processes in a one-dimensional waveguide coupled to two- or three-level giant atom, respectively. The accumulated phase shift between two coupling points can be utilized alter processes. obtain exact interacting wavefunction of these systems following Lippmann-Schwinger formalism, from which analytical expressions incoherent power spectra and second-order correlations are also derived. spectrum, defined by correlation bound state, serves as useful...

Realization of quantum nonlinearity in quadratic optomechanics, including optical and mechanical at the single-photon level, is crucial to explore extraordinary features. Here we investigate an exponential enhancement optomechanical interaction via parametric amplifications. The process can form in-phase amplified quadrature, rate coupling quadrature will be exponentially increased even strong-coupling regime. Concretely, achieve mediated by interaction, employ a process, strongly couple...