106 citations · 571 across the 23 of their papers we have counts for
23 papers
Dispersive Shock Waves in a 1D Quantum Liquid
Philipp Schüttelkopf, Mohammadamin Tajik, Federica Cataldini +8
We implement a moving boundary condition in a 1D quantum liquid to study nonlinear wave breaking and its regularization by dispersion. Programmable optical potentials allow us to c…
Experimentally probing the Quantum Physics in the Inverted Harmonic Oscillator
Si-Cong Ji, Philipp Schüttelkopf, Nataliia Bazhan +6
When a quantum system passes through an unstable fixed point the local dynamics reduces to the inverted harmonic oscillator (IHO). It exponentially amplifies along one quadrature w…
Damping of phonons in one-dimensional quantum fluids
Federica Cataldini, Nataliia Bazhan, João Sabino +7
Collective excitations in one-dimensional (1D) quantum fluids are expected to propagate almost without dissipation. Here we directly excite phonon modes in a weakly interacting 1D…
Learning Minimal Representations of Many-Body Physics from Snapshots of a Quantum Simulator
Frederik Møller, Gabriel Fernández-Fernández, Thomas Schweigler +3
Analog quantum simulators provide access to many-body dynamics beyond the reach of classical computation. However, extracting physical insights from experimental data is often hind…
Characterising transport in a quantum gas by measuring Drude weights
Philipp Schüttelkopf, Mohammadamin Tajik, Nataliia Bazhan +4
Transport properties play a crucial role in defining materials as insulators, metals, or superconductors. A fundamental parameter in this regard is the Drude weight, which quantify…
Identifying diffusive length scales in one-dimensional Bose gases
Frederik Møller, Federica Cataldini, Jörg Schmiedmayer
In the hydrodynamics of integrable models, diffusion is a subleading correction to ballistic propagation. Here we quantify the diffusive contribution for one-dimensional Bose gases…
Generalized hydrodynamics: a perspective
Benjamin Doyon, Sarang Gopalakrishnan, Frederik Møller +2
Conventional hydrodynamics describes systems with few long-lived excitations. In one dimension, however, many experimentally relevant systems feature a large number of long-lived e…
The Whitham approach to Generalized Hydrodynamics
Frederik Møller, Philipp Schüttelkopf, Jörg Schmiedmayer +1
The formation of dispersive shock waves in the one-dimensional Bose gas represents a limitation of Generalized Hydrodynamics (GHD) due to the coarse-grained nature of the theory. N…
Experimental Observation of Curved Light-Cones in a Quantum Field Simulator
Mohammadamin Tajik, Marek Gluza, Nicolas Sebe +10
We investigate signal propagation in a quantum field simulator of the Klein-Gordon model realized by two strongly coupled parallel one-dimensional quasi-condensates. By measuring l…
Experimental verification of the area law of mutual information in a quantum field simulator
Mohammadamin Tajik, Ivan Kukuljan, Spyros Sotiriadis +10
Theoretical understanding of the scaling of entropies and the mutual information has led to significant advances in the research of correlated states of matter, quantum field theor…
Bridging Effective Field Theories and Generalized Hydrodynamics
Frederik Møller, Sebastian Erne, Norbert J. Mauser +2
Generalized Hydrodynamics (GHD) has recently been devised as a method to solve the dynamics of integrable quantum many-body systems beyond the mean-field approximation. In its orig…
Floquet engineering a bosonic Josephson junction
Si-Cong Ji, Thomas Schweigler, Mohammadamin Tajik +5
We study Floquet engineering of the tunnel coupling between a pair of one-dimensional bosonic quasi-condensates in a tilted double-well potential. By modulating the energy differen…
Emergent Pauli blocking in a weakly interacting Bose gas
Federica Cataldini, Frederik Møller, Mohammadamin Tajik +6
The relationship between many-body interactions and dimensionality is integral to numerous emergent quantum phenomena. A striking example is the Bose gas, which upon confinement to…
Mechanisms for the emergence of Gaussian correlations
Marek Gluza, Thomas Schweigler, Mohammadamin Tajik +8
We comprehensively investigate two distinct mechanisms leading to memory loss of non-Gaussian correlations after switching off the interactions in an isolated quantum system underg…
Thermometry of one-dimensional Bose gases with neural networks
Frederik Møller, Thomas Schweigler, Mohammadamin Tajik +4
We design a neural network to extract and process features from absorption images taken of one-dimensional Bose gases in the quasi-condensate regime. Specifically, the network is t…
Achieving fast high-fidelity optimal control of many-body quantum dynamics
Jesper Hasseriis Mohr Jensen, Frederik Skovbo Møller, Jens Jakob Sørensen +1
We demonstrate the efficiency of a recent exact-gradient optimal control methodology by applying it to a challenging many-body problem, crossing the superfluid to Mott-insulator ph…
Euler-scale dynamical correlations in integrable systems with fluid motion
Frederik S. Møller, Gabriele Perfetto, Benjamin Doyon +1
We devise an iterative scheme for numerically calculating dynamical two-point correlation functions in integrable many-body systems, in the Eulerian scaling limit. Expressions for…
Extension of the Generalized Hydrodynamics to the Dimensional Crossover Regime
Frederik Møller, Chen Li, Igor Mazets +5
In an effort to address integrability breaking in cold gas experiments, we extend the integrable hydrodynamics of the 1d Lieb-Liniger model with two additional components represent…
Approximate Dynamics Lead to More Optimal Control: Efficient Exact Derivatives
Jesper Hasseriis Mohr Jensen, Frederik Skovbo Møller, Jens Jakob Sørensen +1
Accurate derivatives are important for efficiently locally traversing and converging in quantum optimization landscapes. By deriving analytically exact control derivatives (gradien…
Decay and recurrence of non-Gaussian correlations in a quantum many-body system
Thomas Schweigler, Marek Gluza, Mohammadamin Tajik +8
Gaussian models provide an excellent effective description of many quantum many-body systems ranging from condensed matter systems all the way to neutron stars. Gaussian states are…
Introducing iFluid: a numerical framework for solving hydrodynamical equations in integrable models
Frederik S. Møller, Jörg Schmiedmayer
We present an open-source Matlab framework, titled iFluid, for simulating the dynamics of integrable models using the theory of generalized hydrodynamics (GHD). The framework provi…
Designing Arbitrary One-dimensional Potentials on an Atom Chip
Mohammadamin Tajik, Bernhard Rauer, Thomas Schweigler +6
We use laser light shaped by a digital micro-mirror device to realize arbitrary optical dipole potentials for one-dimensional (1D) degenerate Bose gases of 87Rb trapped on an atom…
Correlated Gaussian Approach to Anisotropic Resonantly Interacting Few-Body Systems
F. S. Møller, D. V. Fedorov, A. S. Jensen +1
Quantum mechanical few-body systems in reduced dimensionalities can exhibit many interesting properties such as scale-invariance and universality. Analytical descriptions are often…