Bosons refusing to thermalize in 2D Messy, interacting quantum-mechanical systems are difficult analyze theoretically. In a single spatial dimension, the calculations still tractable, and experiments have recently confirmed prediction that sufficiently strong disorder can disrupt transport of particles. two dimensions, however, theoretical blueprint is missing. Choi et al. used single-site imaging cold 87 Rb atoms an optical lattice show similar localization occurs two-dimensional (2D)...

We present the creation and time evolution of two-dimensional Skyrmion excitations in an antiferromagnetic spinor Bose-Einstein condensate. Using a spin rotation method, textures were imprinted on sodium condensate polar phase, where is topologically protected. The was observed to be stable short scale few tens ms but dynamically deform its shape eventually decay uniform texture. deformed reveal that dynamics involves breaking phase inside without having topological charge density flow...

Quantum annealing is an approach to quantum computing that could offer fast, efficient solutions certain types of complex problems. New experiments take important step toward implementing a cold-atom-based annealer relies on coherent many-body interactions between Rydberg states in cold atomic gases.

We investigate thermal relaxation of superfluid turbulence in a highly oblate Bose-Einstein condensate. generate turbulent flow the condensate by sweeping center region with repulsive optical potential. The shows spatially disordered distribution quantized vortices and vortex number exhibits nonexponential decay behavior which we attribute to pair annihilation. vortex-antivortex collisions are identified crescent-shaped, coalesced cores. observe that is quantitatively well described rate...

Closed generic quantum many-body systems may fail to thermalize under certain conditions even after long times, a phenomenon called localization (MBL). Numerous studies support the stability of MBL phase in strongly disordered one-dimensional systems. However, situation is much less clear when small part system ergodic, scenario which also has important implications for existence higher dimensions. Here we address this question experimentally using large-scale simulator ultracold bosons...

Abstract Background As the global population increases, demand for protein sources is expected to increase, driving cell-based cultivated meat. This study aimed enhance productivity of meat through optimization cell source and organization process. Results We engineered fibroblasts into myogenic cells via non-viral introduction MYOD1 gene, avoiding viral methods safety. After confirming stable derivation cells, we combined knockout (KO) MSTN , a negative regulator myogenesis, with -mediated...

We observe experimentally the spontaneous formation of star-shaped surface patterns in driven Bose-Einstein condensates. Two-dimensional with $l$-fold symmetry, ranging from quadrupole ($l=2$) to heptagon modes ($l=7$), are parametrically excited by modulating scattering length near Feshbach resonance. An effective Mathieu equation and Floquet analysis utilized, relating instability conditions dispersion a trapped superfluid. Identifying resonant frequencies patterns, we precisely measure...

We investigate an experimental method for imprinting Skyrmion spin textures in a spinor Bose–Einstein condensate by rapidly moving the zero-field center of three-dimensional (3D) quadrupole magnetic field through condensate. Various excitations such as 2D Skyrmions and coreless vortices were created spin-1 sodium condensates, initially prepared uniform polar or ferromagnetic phase. The characterized with spatial distribution tilt angle, which is found to be good quantitative agreement local...

We measure the in-plane distribution of thermally activated vortices in a trapped quasi-2D Bose gas, where we enhance visibility density-depleted vortex cores by radially compressing sample before releasing trap. The pairing is revealed two-vortex spatial correlation function obtained from distribution. density decreases gradually as temperature lowered, and below certain temperature, vortex-free region emerges center sample. This shows crossover Berezinskii-Kosterlitz-Thouless phase...

We report the observation of matter-wave jet emission in a strongly ferromagnetic spinor Bose-Einstein condensate $^{7}\mathrm{Li}$ atoms. Directional atomic beams with $|F=1,{m}_{F}=1⟩$ and $|F=1,{m}_{F}=\ensuremath{-}1⟩$ spin states are generated from $|F=1,{m}_{F}=0⟩$ state condensates or vice versa. This results collective spin-mixing scattering events, where spontaneously produced pairs atoms opposite momentum facilitates additional collisions as they pass through condensates. The jets...

For a spin-carrying particle moving in spatially varying magnetic field, effective electromagnetic forces can arise due to the geometric phase associated with adiabatic spin rotation of particle. We report observation Hall effect spinor Bose-Einstein condensate skyrmion texture. Under translational oscillations texture, resonantly develops circular motion harmonic trap, demonstrating existence an Lorentz force. When circulates, quantized vortices are nucleated boundary region and vortex...

We measure the power spectrum of density distribution a freely expanding two-dimensional (2D) degenerate Bose gas, where irregular modulations gradually develop due to initial phase fluctuations in sample. The has an oscillatory shape, peak positions are found be independent temperature and show scaling behavior course expansion. relative intensity is estimated from normalized spectral strength observed decrease at lower temperatures, confirming thermal nature fluctuations. investigate...

We demonstrate a fast production of large $^{23}\mathrm{Na}$ Bose-Einstein condensates in an optically plugged magnetic quadrupole trap. A single global minimum the trapping potential is generated by slightly displacing plug beam from center field. With dark magneto-optical trap and simple rf evaporation, our system produces condensate with $N\ensuremath{\approx}{10}^{7}$ atoms every 17 s. The Majorana loss rates resultant heating for various temperatures are measured without plugging....

Exotic quantum many-body states, such as Haldane and spin liquid phases, can exhibit remarkable features like fractional excitations non-Abelian statistics offer new understandings of entanglement in systems. These phases are classified by nonlocal correlators that be directly measured atomic analog simulating platforms, optical lattices Rydberg atom arrays. However, characterizing these large systems is experimentally challenging because they sensitive to local errors loss, which suppress...

We demonstrate a single-site and single-atom-resolved fluorescence imaging of bosonic Mott insulator $^7$Li atoms in an optical lattice. The images are obtained by implementing Raman sideband cooling on deep two-dimensional square lattice, where we collect scattered photons with high numerical aperture objective lens. lattice is created folded retro-reflected beam configuration that can reach 2.5~mK depth from single laser source. elliptically focused to have large area potential. On average...

Scale invariance and self-similarity in physics provide a unified framework to classify phases of matter dynamical properties near-equilibrium systems. However, extending this far-from-equilibrium quantum many-body systems categorizing their dynamics have remained major challenge physics. Here, we report on the first classification universal coarsening quenched two-dimensional ferromagnetic spinor Bose gas. We observe spatiotemporal scaling spin correlation functions with distinguishable...

Backup and recovery is an important feature of database systems since it protects data against unexpected hardware software failures. Database can provide safety reliability by creating a backup restoring the from failure. administrators use backup/recovery tools that are provided with or methods operating systems. However, existing perform time-consuming jobs may negatively affect run-time performance during normal operation even though high-performance SSDs used. In this paper, we present...

As an effort to develop more efficient system for excavator, EH (Electro-Hydraulic) has been widely adopted take the advantage of well-commercialized valves and its control technologies[1]. Utilizing technology, innovative IMV (Independent Metering Valve) excavator mechanism, which consists high capacity valve blocks, electric-controlled pump, a main controller unit, developed by Hyundai Heavy Industries Co., Ltd. This can provide tremendous flexibility cylinder movements reduce energy...

We report the observation of strongly ferromagnetic $F=1$ spinor Bose-Einstein condensates $^7$Li atoms. The are generated in an optical dipole trap without using magnetic Feshbach resonances, so that have internal spin degrees freedom. Studying non-equilibrium dynamics, we measured interaction energy and determined $s$-wave scattering length difference among total $f$ channels to be $a_{f=2}-a_{f=0} =-18(3)$ Bohr radius. This strong collision-channel dependence leads a large variation...

We demonstrate the production of large $^{7}\mathrm{Li}$ Bose-Einstein condensates in an optical dipole trap using ${D}_{1}$ gray molasses. The sub-Doppler cooling technique reduces temperature $4\ifmmode\times\else\texttimes\fi{}{10}^{9}$ atoms to $25\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\mathrm{K}$ 3 ms. After microwave evaporation a magnetic quadrupole trap, we transfer crossed where employ Feshbach resonance on $|F=1,{m}_{F}=1\ensuremath{\rangle}$ state. Fast is achieved by tilting...