Measurement of total phase fluctuation in cold-atomic quantum simulators
arXiv:2408.03736 · doi:10.1103/PhysRevResearch.7.L022031
Abstract
Studying the dynamics of quantum many-body systems is often constrained by the limitations in probing relevant observables, especially in continuous systems. A powerful method to gain information about such systems is the reconstruction of local currents from the continuity equation. We show that this approach can be used to extract the total phase fluctuation of adjacent Bose gases. We validate our technique numerically and demonstrate its effectiveness by analyzing data from selected experiments simulating 1D quantum field theories through the phase difference of two parallel 1D Bose gases. This analysis reveals the previously hidden sector of the sum mode of the phase, which is important for studying long-time thermalization and out-of-equilibrium dynamics of the system. Our method is general and can be applied to other cold atom systems with spatial phase gradients, thereby expanding the scope and capabilities of cold-atomic quantum simulators.
6+6 pages, 10 figures. Significant improvement on results
References in corpus (18)
- Matter-wave interferometry in a double well on an atom chip
- Experimental Observation of a Generalized Gibbs Ensemble
- Ultracold atoms out of equilibrium
- Universal theory of nonlinear Luttinger liquids
- Linear response theory for a pair of coupled one-dimensional condensates of interacting atoms
- Quantum field simulator for dynamics in curved spacetime
- Decoherence Dynamics in Low-Dimensional Cold Atom Interferometers
- Experimental verification of the area law of mutual information in a quantum field simulator
- Local readout and control of current and kinetic energy operators in optical lattices
- Emergent Pauli blocking in a weakly interacting Bose gas
- Experimental Observation of Curved Light-Cones in a Quantum Field Simulator
- Preparing and Analyzing Solitons in the sine-Gordon Model with Quantum Gas Microscopes
- Observation of the BKT Transition in a 2D Bose Gas via Matter-Wave Interferometry
- Universal Scaling of the Dynamic BKT Transition in Quenched 2D Bose Gases
- Thermometry of one-dimensional Bose gases with neural networks
- Mechanisms for the emergence of Gaussian correlations
- Role of interactions in time-of-flight expansion of atomic clouds from optical lattices
- Systematic analysis of relative phase extraction in one-dimensional Bose gases interferometry