Given the important advantages of mid-infrared optical range (2.5 to 25 μm) for biomedical sensing, communications, and molecular spectroscopy, extending quantum information technology this region is highly attractive. However, development still in its infancy. Here, we report on generation a time-energy entangled photon pair wavelength band. By using frequency upconversion detection technology, observe two-photon Hong-Ou-Mandel interference demonstrate entanglement between twin photons at...

A triple-layer transmitarray antenna has been designed, fabricated, and tested at X-band. Using a spiral-dipole element, full transmission phase range of 360 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">°</sup> is achieved for magnitude equal to or better than -4.2 dB. The distribution the elements optimized reduce effects lossy with low magnitudes on gain, leading an average element loss as 0.49 measured gain prototype 28.9 dB 11.3 GHz,...

Strong mutual interaction which correlates elementary excitations of quantum matter plays a key role in range emergent phenomena, from binding and condensation to thermalization many-body localization. Here, we employ Rydberg simulator experimentally demonstrate strongly correlated spin transport anisotropic Heisenberg magnets, where the magnon-magnon can be tuned 2 orders magnitude larger than magnon hopping strength. In our approach, motion magnons is controlled by an induced spin-exchange...

Sorting quantum fields into different modes according to their Fock-space numbers is a highly desirable operation. In this Letter, we show that pair of two-level emitters, chirally coupled waveguide, may scatter single- and two-photon components an input pulse orthogonal temporal with fidelity ≳0.9997. We develop general theory characterize optimize process reveal such high enabled by interesting scattering dynamics: while the first emitter gives rise complex multimode field, second...

Abstract Because traditional barring facilities have difficulty in controlling the water surface and low intelligence degree, a new type of intelligent electronic pulse facility was developed. The system established dynamic charging discharging model, an electric field strength calculation forward reverse rotation conduction model. used controller area network bus to realize cooperative operation between one master machine multiple slave machines that suitable for fish blocking various...

Arrays of highly excited Rydberg atoms can be used as powerful quantum simulation platforms. Here, we introduce an approach that makes it possible to implement fully controllable effective spin interactions in such systems. We show optical dressing with multicolor laser fields opens up distinct interaction channels enable complete site-selective control the induced and favorable scaling respect decoherence. apply this method generate synthetic gauge for excitations where magnetic flux...

Converting the medium-emitting infrared field to visible band is an effective image-detection method. We propose a comprehensive theory of image up-conversion under continuous optical pumping, and discuss relationship between experimental parameters imaging view, resolution, quantum efficiency, conversion bandwidth. Theoretical predictions are given based on numerical simulations, which show good agreement with results. In particular, coherent incoherent light illumination studied separately...

The Jaynes-Cummings model provides a simple and accurate description of the interaction between two-level quantum emitter single mode radiation. Due to multimode continuum eigenmodes in free space waveguides, should not be expected properly describe an traveling pulse In this article, we review cascaded system approach that accurately describes with incident When applied system, different iterations lead master equations Jaynes-Cummings-like Hamiltonians damping terms.

We present a low-profile antenna derived from center-fed circular patch to provide uniform spatial coverage around human head in 5.8-GHz ISM band. With the thickness of only 7 mm, it provides compelling solution for beacon-like radiator or harvester embedded smart headgear an in/off-body communication relay-station. will first outline development ellipsoid model numerically efficient optimization and then detail based on full-wave simulations. The results are validated using anatomical...

We present a scheme for engineering quantum transport dynamics of spin excitations in chain laser-dressed Rydberg atoms, mediated by synthetic exchange arising from diagonal van der Waals interaction. The dynamic tunability and long-range interaction feature our allows the exploration physics unattainable conventional systems. As two concrete examples, we first demonstrate topological exciton pumping protocol that facilitates quantized entanglement transfer, second discuss highly nonlocal...

The electromagnetic modeling of practical finite periodic structures is a topic growing interest. Due to the truncation infinite structures, surface waves will be excited and localized near discontinuous interfaces leading edge effect. In this work, are numerically extracted their magnitudes decay rates analyzed for different materials geometries. Based on exponential wave, novel method developed by connecting solution large array problem with that relatively small one achieve low complexity...

We employ a cascaded system approach to numerically simulate the interaction of photon pulses with two-level scatterer in chiral waveguide QED setup and show that scattering two-photon pulse may lead predominant population only two output wave packet modes an entangled state, $|2,0\ensuremath{\rangle}--|0,2\ensuremath{\rangle}$. In complementary wave-packet basis, this is product state orthogonal single-photon packets. Operating process reverse allows perfect merging distinguishable packets...

Coherent manipulation of quantum states light is key to photonic information processing. In this Letter, we show that a passive two-level nonlinearity suffices implement non-Gaussian operations on propagating field modes. particular, the collective light-matter interaction can efficiently extract single photon from multi-photon input wave packet an orthogonal temporal mode. We accurately describe single-photon subtraction process by elements intuitive quantum-trajectory model. By employing...

Coherent manipulation of quantum states light is key to photonic information processing. In this Letter, we show that a passive two-level nonlinearity suffices implement non-Gaussian operations on propagating field modes. particular, the collective light-matter interaction can efficiently extract single photon from multiphoton input wave packet an orthogonal temporal mode. We accurately describe single-photon subtraction process by elements intuitive quantum-trajectory model. By employing...

A reflectarray antenna combines the advantages of reflectors and phased-arrays. Due to its low profile, loss, versatile radiation properties, it has emerged as a new generation high-gain antennas. Meanwhile, terahertz (THz) technology, which locates between microwave infrared, is frontier state-of-the-art electromagnetic research. Recently, concept been extended from THz higher frequencies. In this paper, several available design methodologies on antennas are reviewed, such printed using...

We report the experimental observation of strong two-color optical nonlinearity in an ultracold gas $^{85}\mathrm{Rb}\text{\ensuremath{-}}^{87}\mathrm{Rb}$ atom mixture. By simultaneously coupling two probe transitions $^{85}\mathrm{Rb}$ and $^{87}\mathrm{Rb}$ atoms to Rydberg states electromagnetically induced transparency (EIT) configurations, we observe significant suppression resonance for one field when second is detuned at $\ensuremath{\sim}1\phantom{\rule{3.33333pt}{0ex}}\mathrm{GHz}$...

We show that a single photon propagating through Rydberg-dressed atomic ensemble can exchange its spin state with atom. Such spin-exchange collision exhibits both dissipative and coherent features, depending on the interaction strength. For strong interaction, dissipatively drives system into an entangled dark of In weak regime, scattering coherently flips in multiphoton input pulse, demonstrating generic single-photon subtracting process. An analytical treatment this process reveals...

This paper introduces a new approach to design microstrip patch antenna with reconfigurable dual band operation. Dual-band is achieved by the placement of lumped capacitor on slotted antenna, and two resonant frequencies their ratio are function capacitance value. Consequently, tuning both allowed choosing proper If varactor an appropriate biasing network used instead, electronic attained changing applied DC voltage. To understand resonance behavior proposed transmission line (TL) model...

We propose an analytical model of quasi-normal mode (QNM) for resonant plasmonic nano cavities formed by sub wavelength grooves in metallic substrate. The QNM has shown great advantages understanding and calculating the frequency response nano-structures. With our we show that originates from a resonance fundamental every individual groove its interaction via surface waves. Analytical expression complex eigenfrequency as well field distribution can be derived model. few assumptions on...

We propose a nonreciprocal diffraction system based on the photonic Aharonov-Bohm effect. The implementation utilizes simultaneous up and down transition of Bloch modes in dielectric grating created by time-harmonic constant modulation. This double process generates opposite effective magnetic fluxes for photons symmetric antisymmetric modes, which gives rise to spatial interference between them. With broken time-reversal symmetry, this is possible exhibit unidirectional highly efficient...

We present a scheme for coherently manipulating quantum states of photons by incorporating multiple photonic modes in system with long-range interactions. The presence nonlocal photon-photon interactions destroys the energy or momentum matching conditions between distinct propagating polaritons, and consequently gives rise to blockaded effective coupling corresponding polaritons. Such blockade mechanism protects from interaction-induced dissipations enables highly tunable few-photon...