A key resource for distributed quantum-enhanced protocols is entanglement between spatially separated modes. Yet, the robust generation and detection of nonlocal regions an ultracold atomic system remains a challenge. Here, we use spin mixing in tightly confined Bose-Einstein condensate to generate entangled state indistinguishable particles single spatial mode. We show experimentally that this local can be by self-similar expansion cloud. Spatially resolved read-out used reveal particularly...

Ultracold gases provide an unprecedented level of control for the investigation soliton dynamics and collisions. We present a scheme deterministically preparing pairs three-component solitons in Bose-Einstein condensate. Our method is based on local spin rotations which simultaneously imprint suitable phase density distributions. This enables us to observe striking collisional properties vector degree freedom naturally arises coherent nature emerging multicomponent solitons. find that...

Quantum simulators built from ultracold atoms promise to study quantum phenomena in interacting many-body systems. However, it remains a challenge experimentally prepare strongly correlated continuous systems such that the properties are dominated by fluctuations. Here, we show how enhance correlations one-dimensional multimode bosonic Josephson junction, which is simulator of sine-Gordon field theory. Our approach based on ability track nonequilibrium dynamics properties. After creating...

We augment the information extractable from a single absorption image of spinor Bose-Einstein condensate by coupling to initially empty auxiliary hyperfine states. Performing unitary transformations in both original and manifold enables simultaneous measurement multiple spin-1 observables. apply this scheme an elongated atomic cloud $^{87}\mathrm{Rb}$ simultaneously read out three orthogonal spin directions with that directly access spatial structure. The readout even allows extraction...

A prerequisite for the comprehensive understanding of many-body quantum systems is a characterization in terms their entanglement structure. The experimental detection spatially extended describable by fields still presents major challenge. We develop general scheme certifying and demonstrate it revealing between distinct subsystems spinor Bose-Einstein condensate. Our builds on resolved simultaneous field two conjugate observables which allows confirmation correlations local as well...

The universal scaling of macroscopic observables tells us about the loss information on initial conditions and microscopic system properties. By studying time evolution an isolated spinor Bose gas after a sudden quench into magnetically ordered phase, it is numerically shown that at nonthermal fixed point possible in purely one-dimensional geometry.

We present our new experimental and theoretical framework which combines a broadband superluminescent diode (SLED/SLD) with fast learning algorithms to provide speed accuracy improvements for the optimization of 1D optical dipole potentials, here generated Digital Micromirror Device (DMD). To characterize setup potential speckle patterns arising from coherence, we compare single-mode laser by investigating interference properties. employ Machine Learning (ML) tools train physics-inspired...

Close to equilibrium, the underlying symmetries of a system determine its possible universal behavior. Far from however, different phenomena associated with existence multiple non-thermal fixed points can be realized for given microscopic symmetries. Here, we study this phenomenon using quasi-one-dimensional spinor Bose-Einstein condensate. We prepare two initial conditions and observe distinct scaling dynamics exponents. Measurements complex-valued order parameter spatial resolution allow...

This work explores the possibility of creating and controlling unconventional nonlinearities by periodic driving, in a broad class systems described nonlinear Schrödinger equation (NLSE). By means parent quantum many-body description, we demonstrate that such driven are well captured an effective NLSE with emergent nonlinearities, which can be finely controlled tuning driving sequence. We first consider general two-mode systems—relevant to optical Kerr cavities, waveguides, Bose-Einstein...

Quantum field theories (QFTs) as relevant for condensed-matter or high-energy physics are formulated in continuous space and time, typically emerge effective low-energy descriptions. In atomic physics, an example is given by tunnel-coupled superfluids, which realize the paradigmatic sine-Gordon model, can act quantum simulators of QFTs. To quantitatively characterize QFT simulators, to discover Hamiltonian governing dynamics a many-body system, we discuss learning method systematically...

Active interferometers use amplifying elements for beam splitting and recombination.We experimentally implement such a device by using spin exchange in Bose-Einstein condensate.The two interferometry modes are initially empty states that get spontaneously populated the process of parametric amplification.This nonlinear mechanism scatters atoms into both pairwise fashion generates nonclassical state.Finally, matched second period is performed nonlinearly amplifies output signal maps phase...

The efficient readout of the relevant information is pivotal for quantum simulation experiments. Often only single observables are accessed by performing standard projective measurements. In this work, we implement a generalized measurement scheme based on controlled outcoupling atoms. This gives us simultaneous access to number imbalance and relative phase in system two tunnel-coupled 1D Bose gases, which realize simulator sine-Gordon field theory. We demonstrate that our limited accessing...

We discuss Hamiltonian learning in quantum field theories as a protocol for systematically extracting the operator content and coupling constants of effective theory Hamiltonians from experimental data. Learning varying spatial measurement resolutions gives access to at different energy scales, allows learn flow reminiscent renormalization group. Our method, which we demonstrate both theoretical studies available data gas experiment, promises new ways addressing emergence simulation experiments.

The efficient readout of the relevant information is pivotal for quantum simulation experiments. Often only single observables are accessed by performing standard projective measurements. In this work, we implement an atomic beam splitter controlled outcoupling that enables a generalized measurement scheme. This gives us simultaneous access to number imbalance and relative phase in system two tunnel-coupled 1D Bose gases, which realize simulator sine-Gordon field theory. We demonstrate...

In einer Supraflüssigkeit können sich Anregungen ohne Reibung ausbreiten, wie man anhand von Wolken aus ultrakalten Atomen hervorragend studieren kann. unseren Experimenten in Heidelberg ist es uns gelungen, zum ersten Mal die Koexistenz zweier sehr unterschiedlicher Supraflüssigkeiten zu realisieren und mittels neuartiger Methoden Struktur dieser besonderen Quantenmaterie untersuchen.

Quantum simulators built from ultracold atoms promise to study quantum phenomena in interacting many-body systems. However, it remains a challenge experimentally prepare strongly correlated continuous systems such that the properties are dominated by fluctuations. Here, we show how enhance correlations one-dimensional multimode bosonic Josephson junction, which is simulator of sine-Gordon field theory. Our approach based on ability track non-equilibrium dynamics properties. After creating...

This work explores the possibility of creating and controlling unconventional nonlinearities by periodic driving, in a broad class systems described nonlinear Schrödinger equation (NLSE). By means parent quantum many-body description, we demonstrate that such driven are well captured an effective NLSE with emergent nonlinearities, which can be finely controlled tuning driving sequence. We first consider general two-mode - relevant to optical Kerr cavities, waveguides Bose-Einstein...

We present our new experimental and theoretical framework which combines a broadband superluminescent diode (SLED/SLD) with fast learning algorithms to provide speed accuracy improvements for the optimization of 1D optical dipole potentials, here generated Digital Micromirror Device (DMD). To characterize setup potential speckle patterns arising from coherence, we compare single-mode laser by investigating interference properties. employ Machine Learning (ML) tools train physics-inspired...