Quantum illumination is a quantum-optical sensing technique in which an entangled source exploited to improve the detection of low-reflectivity object that immersed bright thermal background. Here, we describe and analyze system for applying this at microwave frequencies, more appropriate spectral region target than optical, due naturally occurring background regime. We use electro-optomechanical converter entangle signal optical idler fields, with former being sent probe latter retained...

Nonreciprocal circuit elements form an integral part of modern measurement and communication systems. Mathematically they require breaking time-reversal symmetry, typically achieved using magnetic materials more recently the quantum Hall effect, parametric permittivity modulation or Josephson nonlinearities. Here, we demonstrate on-chip magnetic-free circulator based on reservoir engineered optomechanical interactions. Directional circulation is with controlled phase-sensitive interference...

Nonreciprocity, arising from the breaking of time-reversal symmetry, has become a fundamental tool in diverse quantum technology applications. It enables directional flow signals and efficient noise suppression, constituting key element architecture current information computing systems. Here we explore its potential optimizing charging dynamics battery. By introducing nonreciprocity through reservoir engineering during process, induce directed energy charger to battery, resulting...

Abstract Quantum control allows us to address the problem of engineering quantum dynamics for special purposes. While recently field batteries has attracted much attention, optimization their charging not benefited from methods. Here we fill this gap by using an method. We apply first time convergent iterative method population a bipartite system in two cases, starting with qubit-qubit case. The charger-battery is considered here, where energy pumped into charger external classical...

Quantum illumination uses entangled signal-idler photon pairs to boost the detection efficiency of low-reflectivity objects in environments with bright thermal noise. Its advantage is particularly evident at low signal powers, a promising feature for applications such as noninvasive biomedical scanning or low-power short-range radar. Here, we experimentally investigate concept quantum microwave frequencies. We generate fields illuminate room-temperature object distance 1 m free-space setup....

Quantum transduction, the process of converting quantum signals from one form energy to another, is an important area science and technology. The present perspective article reviews transduction between microwave optical photons, that has recently seen a lot activity progress because its relevance for connecting superconducting processors over long distances, among other applications. Our review covers leading approaches achieving such with emphasis on those based atomic ensembles,...

Practical quantum networks require low-loss and noise-resilient optical interconnects as well non-Gaussian resources for entanglement distillation distributed computation. The latter could be provided by superconducting circuits but - despite growing efforts rapid progress existing solutions to interface the microwave domains lack either scalability or efficiency, in most cases conversion noise is not known. In this work we utilize unique opportunities of silicon photonics, cavity...

We propose an approach for the optimization of charging harmonic oscillators (quantum batteries) coupled to a oscillator (charger), driven by laser field. demonstrate that energy transfer limitations can be significantly mitigated in presence catalyst systems, mediating between charger and quantum batteries. show these either qubits or oscillators, enhance amount transferred batteries, while they themselves store almost no energy. It eliminates need optimizing frequency field whose optimal...

The photon blockade breakdown in a continuously driven cavity QED system has been proposed as prime example for first-order driven-dissipative quantum phase transition. However, the predicted scaling from microscopic behavior—dominated by fluctuations—to macroscopic one—characterized stable phases—and associated exponents and diagram have not observed so far. In this work we couple single transmon qubit with fixed coupling strength <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...

There has been significant interest recently in using complex quantum systems to create effective nonreciprocal dynamics. Proposals have put forward for the realization of artificial magnetic fields photons and phonons; experimental progress is fast making these proposals a reality. Much work concentrated on use such controlling flow signals, e.g., isolators or directional amplifiers optical signals. In this paper, we build but move different direction. We develop theory discuss potential...

Quantum Computing (QC) refers to an emerging paradigm that inherits and builds with the concepts phenomena of Mechanic (QM) significant potential unlock a remarkable opportunity solve complex computationally intractable problems scientists could not tackle previously. In recent years, tremendous efforts progress in QC mark milestone solving real-world much more efficiently than classical computing technology. While considerable is being made move quantum research need be devoted this domain...

The interaction of a single-mode field with both weak Kerr medium and parametric nonlinearity in an intrinsically nonlinear optomechanical system is studied. nonlinearities due to the coupling Kerr-down conversion lead bistability tristability mean intracavity photon number. Also, our work demonstrates that lower bound resolved sideband regime minimum attainable phonon number can be less than bare cavity by controlling phase driving field. Moreover, we find under consideration degree...

Abstract We propose an efficient microwave-photonic modulator as a resource for stationary entangled microwave-optical fields and develop the theory deterministic entanglement generation quantum state transfer in multi-resonant electro-optic systems. The device is based on single crystal whispering gallery mode resonator integrated into 3D-microwave cavity. specific design relies new combination of thin-film technology conventional machining that optimized lowest dissipation rates microwave,...

Quantum Computing (QC) has gained immense popularity as a potential solution to deal with the ever-increasing size of data and associated challenges leveraging concept quantum random access memory (QRAM). QC promises-quadratic or exponential increases in computational time parallelism thus offer huge leap forward computation Machine Learning algorithms. This paper analyzes speed up performance when applied machine learning algorithms, known (QML). We QML methods such Support Vector (QSVM),...

Face recognition is one of the most ubiquitous examples pattern in machine learning, with numerous applications security, access control, and law enforcement, among many others. Pattern classical algorithms requires significant computational resources, especially when dealing high-resolution images an extensive database. Quantum have been shown to improve efficiency speed tasks, as such, they could also potentially complexity face process. Here, we propose a quantum learning algorithm for...

Incorporating cavity magnonics has opened up a new avenue in controlling non-reciprocity. This work examines yttrium iron garnet sphere coupled to planar microwave at millikelvin temperature. Non-reciprocal device behavior results from the cooperation of coherent and dissipative coupling between Kittel mode mode. The device’s bi-directional transmission was measured compared theory derived previously room temperature experiment. Investigations are also conducted into key performance metrics...

In this paper, we show how continuous-variable dense coding can be implemented using entangled light generated from a membrane-in-the-middle geometry. The mechanical resonator is assumed to high reflectivity membrane hung inside quality factor cavity. We that the able generate an amount of entanglement between optical modes at output cavity, which strong enough approach capacity quantum small photon numbers. suboptimal rate reachable by our optomechanical protocol outperform classical...

A quantum-limited amplifier enables the amplification of weak signals while introducing minimal noise dictated by principles quantum mechanics. Such amplifiers serve a broad spectrum applications in computing, including fast and accurate readout superconducting qubits spins, as well various uses sensing metrology. Parametric amplification, primarily developed with use Josephson junctions, has evolved into leading technology for highly effective microwave measurements within circuits. Despite...

We study coherent phonon oscillations and tunneling between two coupled nonlinear nanomechanical resonators. show that the coupling resonators creates an effective Josephson junction, which exhibits different dynamical behaviors: oscillation (phonon-Rabi oscillation) macroscopic self-trapping (phonon blockade). Self-trapping originates from mechanical nonlinearities, meaning when nonlinearity exceeds its critical value, energy exchange is suppressed, them are completely blocked. An classical...

We present a microelectromechanical system, in which silicon beam is attached to comb-drive actuator, used tune the tension and thus its resonance frequency. By measuring frequencies of we show that actuator behave as two strongly coupled resonators. Interestingly, effective coupling rate (∼1.5 MHz) tunable with (+10%) well side-gate (−10%) placed close beam. In contrast, spring constant system insensitive either them changes only by ±0.5%. Finally, can be switch between different rates...