Recent advances in quantum technologies are rapidly stimulating the building of networks. With parallel development multiple physical platforms and different types encodings, a challenge for present future networks is to uphold heterogeneous structure full functionality therefore support modular systems that not necessarily compatible with one another. Central this endeavor capability distribute interconnect optical entangled states relying on discrete continuous variables. Here, we report...

Einstein-Podolsky-Rosen steering is known to be a key resource for one-sided device-independent quantum information protocols. Here we demonstrate using hybrid entanglement between continuous- and discrete-variable optical qubits. To this end, report on suitable inequalities detail the implementation requirements demonstration. Steering experimentally certified by observing violation more than 5 standard deviations. Our results illustrate potential of applications in heterogeneous networks...

Abstract The generation and manipulation of hybrid entanglement light involving discrete- continuous-variable states have recently appeared as essential resources towards the realization heterogeneous quantum networks. Here we investigate a scheme for remote between particle-like wave-like optical qubits based on non-local heralding photon detection. We also extend this with additional local or detections. An allows resulting state to exhibit higher fidelity targeted entangled while...

We demonstrate the feasibility of levitating a small mirror using only radiation pressure. In our scheme, is supported by tripod where each leg Fabry-Perot cavity. The macroscopic state coherently coupled to supporting cavity modes allowing coherent interrogation and manipulation motion. proposed scheme an extreme example optical spring, mechanical oscillator isolated from environment its frequency can be manipulated solely through fields. model stability system find three-dimensional...

Quasi-phase matching (QPM) is a technique extensively utilized in nonlinear optics for enhancing the efficiency and stability of frequency conversion processes. However, conventional QPM relies on periodically poled ferroelectric crystals, which are limited availability. The 3R phase molybdenum disulfide (3R-MoS2), transition metal dichalcogenide (TMDc) with broken inversion symmetry, stands out as promising candidate QPM, enabling efficient process. Here, we experimentally demonstrate at...

Abstract Satellite geodesy uses the measurement of motion one or more satellites to infer precise information about Earth’s gravitational field. In this work, we consider achievable precision limits on such measurements by examining approximate models for three main noise sources in process current Gravitational Recovery and Climate Experiment (GRACE) Follow-On mission: laser phase noise, accelerometer quantum noise. We show that, through time-delay interferometry, it is possible remove from...

For some crystalline materials, a regime can be found where continuous ductile cutting is feasible. Using precision diamond turning, such materials cut into complex optical components with high surface quality and form accuracy. In this work we use diamond-turning to machine monolithic, square-shaped, doubly-resonant LiNbO3 cavity two flat convex facets. When additional mild polishing implemented, the Q-factor of resonator limited only by material absorption loss. We show how our monolithic...

Photothermal effects can alter the response of an optical cavity, for example, by inducing self-locking behavior or unstable anomalies. The consequences these are often regarded as parasitic and generally cause limited operational performance cavity. Despite their importance, however, photothermal parameters usually hard to characterize precisely. In this work we use cavity strongly coupled experimentally observe back-action on relaxation rate. This effect, reminiscent...

We analyze the dynamics of a one-dimensional vertical Fabry-P\'erot cavity, where upper mirror levitates due to intracavity radiation pressure force. A perturbative approach is used based around separation timescales, which allows us calculate physical quantities interest. Due cavity field, we find that mirror's motion will always be unstable for levitation performed using only single laser. Stability can achieved two lasers, one provides trapping potential and other damping effect, locate...

Abstract Optical levitation of mechanical oscillators has been suggested as a promising way to decouple the environmental noise and increase quality factor. Here, we investigate dynamics free-standing mirror acting top reflector vertical optical cavity, designed testbed for tripod cavity setup. To reach regime milligram-scale mirror, intensity intracavity field approaches 3 MW cm −2 . We identify three distinct optomechanical effects: excitation acoustic vibrations, expansion due...

Optical systems are often subject to parametric instability caused by the delayed response of optical field system dynamics. In some cases, parasitic photothermal effects aggravate adding new interaction This may lead possible insurgence or amplification gain that can further destabilize system. this paper, we show properties an optomechanical cavity be modified mitigate even completely cancel instability. By inverting sign let it cooperate with radiation pressure, achieve control dynamics...

Advanced quantum technologies, as well fundamental tests of physics, crucially require the interference multiple single photons in linear-optics circuits. This can result bunching into higher Fock states, leading to a complex bosonic behaviour. These challenging tasks timely develop collective criteria benchmark many independent initial resources. Here we determine whether n imperfect ultimately bunch state $|n \rangle$. We thereby introduce an experimental Fock-state capability for...

Quasi-phase matching (QPM) is a technique extensively utilized in nonlinear optics for enhancing the efficiency and stability of frequency conversion processes. However, conventional QPM relies on periodically poled ferroelectric crystals, which are limited availability. The 3R phase molybdenum disulfide (3R-MoS2), transition metal dichalcogenide (TMDc) with broken inversion symmetry, stands out as promising candidate QPM, enabling efficient process. Here, we experimentally demonstrate at...

We propose a method to tailor the potential experienced by moveable end mirror in cavity optomechanical system specifying spectral properties of input field.We show that engineering power density field desired force function can be approximated, with accuracy approximation limited only linewidth cavity.The very general technique presented here could have applications many kinds systems, particularly those used for sensing and metrology.We demonstrate applying it improve sensitivity...

We examine the use of optomechanically-generated squeezing to obtain a sensitivity enhancement for interferometers in gravitational-wave band. The intrinsic dispersion characteristics optomechanical around mechanical frequency are able produce at different quadratures over spectrum, feature required by beat standard quantum limit an extended range. Under realistic assumptions we show that amount available and quadrature rotation may provide, compared similar amounts fixed-quadrature...

The purpose of this work is to develop a systematic approach towards synchronisation two micro-mechanical oscillators inside one optical cavity using feedback control. We first obtain the linear quantum stochastic state space model for optomechanical system considered in paper. Then we design measurement-based optimal controller, aimed at achieving complete mechanical with different natural frequencies, quadratic Gaussian setting. In addition, simulation results are provided, which show how...

Hybrid entanglement of light combines two quantum information paradigms, the particle-like and wave-like encodings, together. We report on recent experiments that engage this resource for communication protocols: remote state preparation steering.

To date, investigations of carrier-envelope-phase (CEP)-dependent effects have been limited to optical pulses with few cycles and high intensity not reported for other types pulses. Optomechanical systems are shown the potential go beyond these limits. We present an approach using optomechanics extend concept traditional CEP in few-cycle regime mechanical develop a two-step model give physical insight. By adding auxiliary continuous field, we show that CEP-dependent effect appears even...

We characterise the dynamics of a vertical Fabry-Perot cavity, where upper mirror levitates due to radiation pressure force. The system is found naturally unstable, and we study two-laser trapping/damping schemes photothermal effects.

Radiation pressure can be used to enable optomechanical control and manipulation of the quantum state a mechanical oscillator. Optomechanical interaction also mediated by photothermal effects which, although frequently overlooked, may compete with radiation interaction. Understanding how these phenomena affect coherent exchange information between optical degrees freedom is often underdeveloped, particularly in mesoscale high-power systems where fully dominate Here we report an effective...

We investigate the optomechanical interaction between light and metallic nanowires through action of bolometric forces. show that response time photothermal forces induced on nanowire is fast strength can overcome radiation pressure force. Furthermore, we suggest be enhanced by surface plasmon excitation to cool sub-megahertz vibrational modes close its quantum limit.