Although the quality of individual quantum bits (qubits) and gates has been steadily improving, number qubits in a single system increased quite slowly. Here, we demonstrate arbitrary single-qubit based on targeted phase shifts, an approach that can be applied to atom, ion, or other atom-like systems. These are highly insensitive addressing beam imperfections have little cross-talk, allowing for dramatic scaling up qubit number. We performed series 48 individually sites 40% full 5 by...

We demonstrate arbitrary coherent addressing of individual neutral atoms in a 5×5×5 array formed by an optical lattice. Addressing is accomplished using rapidly reconfigurable crossed laser beams to selectively ac Stark shift target atoms, so that only are resonant with state-changing microwaves. The effect these targeted single qubit gates on the quantum information stored nontargeted smaller than 3×10−3 state fidelity. This important step along path converting scalability promise into...

We report on the experimental realization of a conservative optical lattice for cold atoms with sub-wavelength spatial structure. The potential is based nonlinear response three-level in laser-dressed dark states, which not constrained by diffraction limit light generating potential. consists 1D array ultra-narrow barriers widths less than 10~nm, well below wavelength light, physically realizing Kronig-Penney study band structure and dissipation this lattice, find good agreement theoretical...

The generation of entangled photon pairs, which are compatible with quantum devices and standard telecommunication channels critical for the development long-range fiber networks. Aside from wavelength, bandwidth matching, high fidelity produced pairs necessary interfacing efficiency. High-rate, robust entanglement sources that satisfy all these conditions remain an outstanding experimental challenge. In this work, we study source based on four-wave mixing in a diamond configuration warm...

We have measured the total collisional loss rate for ultracold sodium atoms held in a magneto-optical trap (MOT) as function of light intensity trap. extract constant by measuring temporal behavior MOT loading from background vapor. The increases with satisfactory agreement new calculations, which are also presented. results interpreted terms detailed collision processes.

Quantum simulations with ultracold atoms typically create atomic wave functions structures at optical length scales, where direct imaging suffers from the diffraction limit. In analogy to advances in microscopy for biological applications, we use a nonlinear response surpass Exploiting quantum interference, demonstrate superresolution of λ/50 and excellent temporal resolution 500 ns. We characterize our microscope's performance by measuring ensemble-averaged probability density within unit...

High-performance quantum memories are an essential component for regulating temporal events in networks. As a quantum-repeaters, they have the potential to support distribution of entanglement beyond physical limitations fiber loss. This will enable key applications such as distribution, network-enhanced sensing, and distributed computing. Here, we present memory engineered meet real-world deployment scaling challenges. The technology utilizes warm rubidium vapor storage medium, operates at...

Dentine hypersensitivity (DH) is a common condition that frequently encountered in dental practice. The aim of this multi-centre and cross-sectional study was to establish the prevalence DH general population China. A total 6843 subjects were questioned examined using triple syringe with blast cold air confirm diagnosis DH. sensitive surface, loss attachment gingival recession teeth measured recorded. Of 2932 reporting hypersensitive symptoms, 2363 further diagnosed as DH, giving an overall...

We demonstrate 3D microwave projection sideband cooling of trapped, neutral atoms. The technique employs state-dependent potentials that enable photons to drive vibration-number reducing transitions. particular sequence we employ uses minimal spontaneous emission, and works even for relatively weakly bound cool 76% atoms their vibrational ground states in a site-resolvable optical lattice.

We develop an effective field theory (EFT) to describe the few- and many-body propagation of one-dimensional Rydberg polaritons. show that photonic transmission through medium can be found by mapping problem a nonequilibrium quench, where role time space are reversed. include range corrections in EFT they dominate dynamics near scattering resonances presence deep bound states. Finally, we how long-range nature Rydberg-Rydberg interactions induces strong $N$-body between These results pave...

Optical lattices are typically created via the ac Stark shift and limited by diffraction to periodicities $\ensuremath{\ge}\ensuremath{\lambda}/2$, where $\ensuremath{\lambda}$ is wavelength of light used create them. Lattices with smaller may be useful for many-body physics cold atoms can generated stroboscopic application a phase-shifted lattice subwavelength features. Here we demonstrate $\ensuremath{\lambda}/4$-spaced stroboscopically applying optical Kronig-Penney-like potentials which...

Various proteins are expressed during different stages of schistosome development that essential for cercarial penetration vertebrate skin and evasion host immune response. CD4(+)CD25(+) regulatory T cells important in modulating responses towards helminth infections. Schistosoma japonicum protein Sj16 present the secretions schistosomula has been shown to have anti-inflammatory effects; however, it is uncertain whether can induce participate regulation early infection. In this study, we...

Summary In humans and mice, melanocortin receptor 4 (MC4R) accessory protein 2 (MRAP2) can form a complex control energy balance, thus regulating body weight obesity. pigs, missense variant (p.Asp298Asn) of MC4R has been suggested to be associated with growth fatness; however, the effect Asp298Asn substitution on function is controversial, limiting its application in animal breeding. Here we examined this polymorphism constitutive activity, cell surface expression signaling, interaction...

Lead magnesium niobate Pb(Mg1/3Nb2/3)O3 — lead titanate PbTiO3 [abbr. as (1 x) PMN x PT] ferroelectric ceramics with different excesses of MgO and PbO were systematically studied under processing conditions for refrigeration application. It was found that the excess amount PbO, sintering temperature have great effect on crystallographic properties ceramics. In our experiments, —x PT (x = 0.08, 0.10, 0.25 respectively) 2 mol% sintered at 1250 °C/1 hour possess desired perovskite structures...

Ferroelectric (FE) materials directly convert electrical energy to mechanical and are critical applications such as sensors, transducers, actuators. The giant electromechanical response is the manifestation of point between first-order second-order ferroelectric–paraelectric (FE–PE) transitions. For simple classic FE lead titanate (PbTiO3), it commonly accepted that there a in temperature–pressure phase diagram separating first- FE–PE transitions at zero electric field. Here, we show FE-PE...

There has been a recent surge of interest and progress in creating subwavelength free-space optical potentials for ultracold atoms. A key open question is whether geometric potentials, which are repulsive ubiquitous the creation forbid narrow traps with long lifetimes. Here, we show that it possible to create such traps. We propose two schemes realizing demonstrate their superiority over existing proposals. analyze lifetime atoms long-lived bound states possible. This work allows control...

We present a compact all-digital implementation of scanning transfer cavity lock (STCL) for long-term laser frequency stabilization. An interrupt-driven state machine is employed to realize the STCL, with capability correct drifts in slave due measured changes lab environmental conditions. demonstrate an accuracy 0.9 MHz master and wavelengths 556 nm 798 as example. The also demonstrated dynamically scan over wide range while retaining its lock, allowing us accurately interrogate atomic transitions.

Floquet engineering or coherent time periodic driving of quantum systems has been successfully used to synthesize Hamiltonians with novel properties. In ultracold atomic systems, this led experimental realizations artificial gauge fields, topological band structures, and observation dynamical localization, name just a few. Here we present Floquet-based framework stroboscopically engineer spatial features periodicity below the diffraction limit light create them by time-averaging over various...

Adipose afferent reflex (AAR) contributes to sympathetic activation and hypertension. Paraventricular nucleus (PVN) plays an important role in AAR outflow. The aim of the present study was determine whether PVN mediates response insulin a rat model resistance (IR).Male Sprague-Dawley rats were randomly divided into Control IR groups. Insulin induced by supplementing fructose (125 g L(-1) , 12 weeks) drinking water. Renal nerve activity (RSNA) mean arterial pressure (MAP) recorded...

We report here measurements of two-body associative-ionization collisions between sodium atoms confined in a magneto-optic trap. These represent kind ``open'' or dissipative collision for which the energy atom plus applied light field subsystem need not be conserved due to spontaneous-emission coupling vacuum modes radiation field. The experiment measures photoassociative-ionization-rate constant as function optical intensity from about 40 260 mW ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}2}$....