Ultracold gases excited to strongly interacting Rydberg states are a promising system for quantum simulations of many-body systems. For off-resonant excitation such systems in the dissipative regime, highly correlated exhibiting, among other characteristics, intermittency and multimodal counting distributions expected be created. Here we report on realization gas rubidium atoms measurement its full statistics phase diagram both resonant excitation. We find bimodal regime that compatible with...

Nonequilibrium dynamics with controllable kinetic constraints are experimentally realized cold interacting Rydberg gases. The blockade and facilitation shown to lead strikingly different dynamical evolutions of the excitations.

We report on the direct measurement in real space of effect van der Waals forces between individual Rydberg atoms their external degrees freedom. Clusters with interparticle distances around $5\phantom{\rule{0.16em}{0ex}}\ensuremath{\mu}\mathrm{m}$ are created by first generating a small number seed excitations magneto-optical trap, followed off-resonant excitation that leads to chain facilitated events. After variable expansion time field ionized, and from arrival distributions size cluster...

We investigate a novel hybrid system of superconducting charge qubit interacting directly with single neutral atom via electric dipole coupling. Interfacing the macroscopic circuit microscopic atomic is accomplished by varying gate capacitance qubit. To achieve strong interaction, we employ two Rydberg states an electric-dipole allowed transition, which alters polarizability dielectric medium capacitor. Sweeping voltage different rates leads to precise control quantum states. Furthermore,...

We propose a promising hybrid quantum system, where highly excited atom strongly interacts with superconducting $LC$ oscillator via the electric field of capacitor. An external electrostatic is applied to tune energy spectrum atom. The atomic qubit implemented by two eigenstates near an avoided-level crossing in dc Stark map Rydberg Varying brings atomic-qubit transition on or off resonance respect microwave resonator, leading strong atom-resonator coupling extremely large cooperativity....

We report an experimental investigation of the facilitated excitation dynamics in off-resonantly driven Rydberg gases by separating initial off-resonant phase from facilitation phase, which successive events lead to avalanches.We achieve this creating a controlled number seed excitations.Greater insight into avalanche mechanism is obtained analysis full counting distributions.We also present simple mathematical models and numerical simulations avalanches that agree well with our results.

We study a physical system consisting of Bose–Einstein condensate confined to ring shaped lattice potential interrupted by three weak links. The is assumed be driven an effective flux piercing the lattice. By employing path integral techniques, we explore quantum dynamics in pure phase regime. Moreover, effects density's fluctuations are studied through exact diagonalization analysis spectroscopy Bose–Hubbard model. demonstrate that clear two-level emerges tuning magnetic at degeneracy....

Abstract Hybrids consisting of macroscopic superconducting circuits and microscopic components, such as atoms spins, have the potential transmitting an arbitrary state between different quantum species, leading to prospective high-speed operation long-time storage information. Here we propose a novel hybrid structure, where neutral-atom qubit directly interfaces with charge qubit, implement qubit-state transmission. The highly-excited Rydberg atom located inside gate capacitor strongly...

We present two simple designs of matter-wave beam splitters in a trapped Bose-Einstein Condensate (BEC). In our scheme, identical pairs atomic solitons are produced by an adequate control --- time and/or space the scattering length. Our analysis is performed numerical integration Gross-Pitaevskii equation and supported several analytic estimates. results show that these devices can be implemented frame current BEC experiments. The system has potential applications for construction soliton...

One of the most striking features strong interactions between Rydberg atoms is blockade effect, which allows only a single excitation to state within volume sphere. Here we present method that spatially visualizes this phenomenon in an inhomogeneous gas ultracold rubidium atoms. In our experiment scan position one lasers across cold cloud and determine number excitations detected as function position. Comparing distribution obtained for ions created by two-photon ionization process via...

Superconducting atom chips have very significant advantages in realizing trapping structures for ultracold atoms compared to conventional chips. We extend these further by developing the ability dynamically tailor superconducting trap architecture. Heating chosen parts of a film transferring optical images onto its surface we are able modify current density distribution and create desired potentials. This method enables us change shape structure magnetic traps, enabling versatile...

Rydberg excitation dynamics of a 87-Rb cold atom cloud is investigated in an effective one-dimensional geometry. We measure the and full counting statistics for resonant off-resonant to 70S state. While laser distributions have strong sub-Poissonian character, we find strongly bimodal regime. The n-th central moments, up n = 4, are derived from measured distributions.

Here we present two different experimental techniques to generate atomic clouds in density regimes that could be used as a tool study Rydberg systems scenarios. As an example, discuss experiment which the dynamics of excitations were studied both few atom regime and high regime.

The excitation to high-lying Rydberg states is investigated in a sample of 87-Rb atoms undergoing the Bose-Einstein condensation phase transition, limit that spatial dimensions condensed cloud are smaller than (Wan-der-Waals) dipole blockade radius. We measure number excitations by single ion counting as function and thermal fraction. observed distinct decrease due change atomic density distribution, from cloud, through bimodal cloud. When only part present, average measured levels off at...

Nowadays, it has become an essential task to characterize the nonlinear optical response of new materials, in order identify suitable candidates for ultrafast processing all-optical devices. One most widely-used techniques this purpose is Z-scan, which consists on measuring refractive and absorptive responses a material by scanning sample along path convergent Gaussian beam. We will analyze carbon disulfide organic composites. In our setup, using high-repetition rate femtosecond laser, we...

We design an experiment to obtain a Bose-Einstein Condensate (BEC) using ⁸⁷Rb atoms. Taking advantage of this setup, we develop simple and efficient method transfer atoms from first Magneto- Optical-Trap(MOT) second one. Our system consists two glass vacuum cells horizontally connected with MOT aligned at the center each cell. Once rubidium are loaded into MOT, pushig beam forces them move forward MOT. use near-resonant weak laser make reach MOT1 MOT2 both run in...

Atomic soliton lasers are coherent matter-wave emitters that produce localized pulses of atoms extracted from an ultracold atomic reservoir. In adequate conditions it is possible to obtain trains propagate undistorted, a property makes them very useful for ultra-sensitive measurements like gravity-waves detection or interferometry. Some new applications and results will we presented.