Abstract Hybrid quantum systems based on magnons in magnetic materials have made significant progress the past decade. They are built couplings of with microwave photons, optical vibration phonons, and superconducting qubits. In particular, interactions among magnons, cavity phonons form system magnomechanics (CMM), which lies interdisciplinary field QED, magnonics, optics, information. Here, we review experimental theoretical this emerging field. We first introduce underlying theories...

In this paper, we propose two quantum optomechanical arrangements that permit the dissipation-enabled generation of steady two-mode mechanical squeezed states. first setup, oscillators are placed in a optical resonator while second setup located coupled single-mode cavities. We show analytically for an appropriate choice pump parameters, can be driven by cavity dissipation into stationary vacuum, provided damping is negligible. The effect thermal fluctuations also investigated detail and...

We propose a scheme for preparing magnon squeezed states in hybrid cavity-magnon-qubit system. The system consists of microwave cavity that simultaneously couples to mode macroscopic yttrium-iron-garnet sphere via the magnetic-dipole interaction and transmon-type superconducting qubit electric-dipole interaction. By far detuning from magnon-qubit system, is adiabatically eliminated. then get effectively coupled mediation virtual photons cavity. show by driving with two fields appropriately...

We propose a scheme that exploits the combined effects of nonlinear dynamics and dissipation to generate macroscopic quantum superpositions in massive optomechanical oscillators. The effective degenerate three-wave mixing interaction between mechanical optical cavity modes results from quadratic coupling, together with dissipation, can result existence dark superpositions. show analytically confirm numerically various be achieved deterministically, depending on initial state mechanics....

Einstein-Podolsky-Rosen (EPR) steering is a form of quantum correlations and its intrinsic asymmetry makes it distinct from entanglement Bell nonlocality. We propose here scheme for realizing one-way Gaussian two electromagnetic fields mediated by mechanical oscillator. reveal that the steady-state intracavity output obtainable with different cavity losses or strong damping. The conditions achieving this asymmetric are found, shows robust against thermal fluctuations. present can realize...

The authors consider the utilization of time-continuous quantum measurement to achieve hybrid photon-magnon-phonon Einstein-Podolsky-Rosen nonlocality in a cavity magnomechanical interface. This scheme demonstrates measurement-based control phenomena macroscopic systems

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...

In this paper, we propose a scheme for generating steady-state entanglement of remote micromechanical oscillators in unidirectionally coupled cavities. For the system two mechanical oscillators, show that when cavity modes each are driven at red- and blue-detuned sidebands, respectively, stationary two-mode squeezed vacuum state can be generated by cascaded coupling. The degree squeezing is controllable adjusting relative strength pump lasers. Our calculations also achieved robust against...

One-way quantum steering is of importance for technologies, such as secure teleportation. In this paper, we study the generation one-way between two distant yttrium iron garnet (YIG) microspheres in chiral waveguide electromagnonics. We consider that magnon mode with Kerr nonlinearity each YIG sphere chirally coupled to left- and right-propagating guided photons waveguide. find modes absent nonchirality but present merely form one way (i.e., steering) when chirality occurs. The maximal...

We propose an efficient method for dissipative generation of magnonic cat states in a cavity-magnon-qubit hybrid system by exploiting two-magnon driving and dissipation mechanism. When both the magnon qubit are driven, coherent nonlinear interaction is induced, wherein mode exchange energy through pairs. The exploited to steer into quantum superposition distinct states, where evolves either even or odd state, depending on parity initial state. For case state e.g., $|0\rangle$ $|1\rangle$,...

Abstract It is showed how to generate and control the one‐way optomechanical steering in an optomagnomechanical system. In scheme, magnetostriction‐induced deformation displacement of a ferrimagnet couples optical cavity by radiation‐pressure interaction. The resonates with Stokes sideband laser drive field, leading parametric down‐conversion magnon mode anti‐Stokes microwave thereby cooling mechanical motion. By adjusting detuning between we show relative steady‐state population numbers...

Einstein-Podolsky-Rosen (EPR) steering is a quantum nonlocal effect which intrinsically distinct from Bell nonlocality and entanglement. In this paper, we investigate in detail the properties of steady-state light-mechanical Gaussian steerable correlations generic cavity optomechanical system. When considering between intracavity field mechanical oscillator, find that under blue-detuned driving, via parametric downconversion present only one direction and, moreover, determined merely by...

Einstein-Podolsky-Rosen steering manifests a type of quantum correlations intermediate between entanglement and Bell nonlocality. In this paper we propose scheme for realizing hybrid atom-mechanical in the steady-state regime. our scheme, an optomechanical two-mode cavity is coupled to distant ensemble double-$\ensuremath{\lambda}$ atoms cascade way, which induces dissipative interaction mechanics internal atomic states. We show that strong dissipation can lead two-way optimal exhibited...

In this paper, we propose a scheme for deterministically preparing quantum superposition $|{\ensuremath{\psi}}_{s}{\ensuremath{\rangle}}_{b}={C}_{0}{|0\ensuremath{\rangle}}_{b}+{C}_{\mathcal{N}}{|\mathcal{N}\ensuremath{\rangle}}_{b}$ between vacuum and an arbitrary Fock state ${|\mathcal{N}\ensuremath{\rangle}}_{b}$ of mechanical oscillators via strong single-photon optomechanical coupling. We consider cavity which contains Kerr medium is driven by two lasers, with one laser tuned to the...

We investigate the generation of two-mode-entangled light from a laser-driven three-level $\mathbsf{V}$-type atom inside cavity by taking into account spontaneously generated quantum interference between two atomic decay channels. show that under some conditions, system can reduce to nondegenerate parametric amplifier which is responsible for entanglement modes. Compared case without interference, it found field be significantly enhanced when relative phase pumping lasers...

We investigate the enhancement of intracavity entanglement a self-phase-locked type-II nondegenerate optical parameter oscillator (SPL NOPO) via homodyne-mediated quantum feedback. It is found that feedback can effectively enhance squeezing, entanglement, and purity two-mode field in SPL NOPO. Especially for an ordinary NOPO, our scheme simulate standard squeezed vacuum environment pure steady cavity be generated, different from proposed by Mancini [Phys. Rev. A 73, 010304(R) (2006)] which...

We investigate a hybrid electromechanical system consisting of pair charged macroscopic mechanical oscillators coupled to small ensemble Rydberg atoms. The resonant dipole-dipole coupling between an internal atomic transition and the mechanics allows cooling its motional ground state with single atom despite considerable mass imbalance two subsystems. show that rich electronic spectrum atoms, combined their high degree optical control, paves way towards implementing various quantum-control...

In this paper, we consider the generation of mechanical squeezed states and single-phonon Fock states, respectively, by homodyne detection photon subtraction in a dissipative or dispersive optomechanical system under situation that cavity linewidth ${\ensuremath{\kappa}}_{c}$ is much larger than frequency ${\ensuremath{\omega}}_{m}$. We at first show strong squeezing beyond 3-dB limit can be achieved homodyning filtered output field purely for...

In this paper, we investigate the generation of polychromatic quadripartite entanglement continuous variables from a three-level $\ensuremath{\Lambda}$-type atomic system inside an optical quadruply resonant cavity. The atoms are driven by external lasers and simultaneously coupled to four cavity modes means multiply concurrent four-wave mixing interactions. general master equation field is derived explicitly. By solving Gaussian-type using negative-partial-transpose criterion for bipartite...

In this paper, we first consider the generation of mechanical squeezing in a dispersively or dissipatively coupled optomechanical system by continuously homodyning output field cavity. It is found that strong steady-state beyond 3 dB limit can be achieved both systems. The properties are quite different for two types systems and reasons differences analyzed. We next achievement steering dispersive dissipative via monitoring position oscillator. revealed lead entanglement to enhanced...

In this paper, we propose a feasible scheme for generating the Schr\"{o}dinger cat states of macroscopic mechanical resonator in pulsed cavity optomechanics. Starting with cooling oscillator to its ground state, red and blue pulses different powers are simultaneously employed drive achieve squeezed states. Subsequently, second pulse is utilized generate quantum superpositions, conditioned on detection output photons. Finally, after being stored period time, state mapped, third pulse, field...

Nondegenerate triple-photon parametric down-conversion (NTPD) is a potential source for unconditional tripartite non-Gaussian entangled states of continuous variables. Recent experiment has demonstrated strong third-order correlations among bright photon triplets via microwave NTPD in superconducting cavity [C. W. Sandbo Cheng et al., Phys. Rev. X 10, 011011 (2020)]. Previous theoretic works have revealed that only short-time genuine entanglement can be generated even the absence...

The time-dependent characteristic function for the vibrational quanta of two ions separately trapped in cascaded optical cavities is obtained analytically beyond bad cavity limit, which motional mode ion first coupled to field via an effective parametric interaction and that second a linear-mixing as proposed by Peng Parkins [Phys. Rev. A 65, 062323 (2002)]. It found develop two-mode mixed Gaussian entangled state if there exists unidirectional coupling from one.

Greenberger-Horne-Zeilinger (GHZ) and cluster states are two typical kinds of multipartite entangled can respectively be used for realizing quantum networks one-way computation. We propose a feasible scheme generating Gaussian GHZ multiple mechanical oscillators by pulsed cavity optomechanics. In our scheme, each optomechanical is driven blue-detuned pulse to establish steerable correlations between the output field oscillator, outputs combined at beam-splitter array with given...