44 citations · 150 across the 10 of their papers we have counts for
10 papers
Fraunhofer Patterns in Atomic Josephson Junctions
Kevin T. Geier, Giampiero Marchegiani, Vijay Pal Singh +2
Driven atomic Josephson junctions allow one to monitor phase-coherent dynamics with unprecedented control and flexibility of the system's physical conditions. While cold-atom manif…
Boosting quantum annealing performance through direct polynomial unconstrained binary optimization
Sebastian Nagies, Kevin T. Geier, Javed Akram +3
Quantum annealing aims at solving optimization problems of practical relevance using quantum-computing hardware. Problems of interest are typically formulated in terms of quadratic…
The role of higher-order terms in trapped-ion quantum computing with magnetic gradient induced coupling
Sebastian Nagies, Kevin T. Geier, Javed Akram +5
Trapped-ion hardware based on the Magnetic Gradient Induced Coupling (MAGIC) scheme is emerging as a promising platform for quantum computing. Nevertheless, in this -- as in any ot…
Superfluidity and sound propagation in disordered Bose gases
Kevin T. Geier, Jeff Maki, Alberto Biella +3
Superfluidity describes the ability of quantum matter to flow without friction. Due to its fundamental role in many transport phenomena, it is crucial to understand the robustness…
Qudit-native measurement protocol for dynamical correlations using Hadamard tests
Pavel P. Popov, Kevin T. Geier, Valentin Kasper +2
Dynamical correlations reveal important out-of-equilibrium properties of the underlying quantum many-body system, yet they are notoriously difficult to measure in experiments. Whil…
Dynamics of Stripe Patterns in Supersolid Spin-Orbit-Coupled Bose Gases
Kevin T. Geier, Giovanni I. Martone, Philipp Hauke +2
Despite ground-breaking observations of supersolidity in spin-orbit-coupled Bose-Einstein condensates, until now the dynamics of the emerging spatially periodic density modulations…
Non-invasive measurement of currents in analog quantum simulators
Kevin T. Geier, Janika Reichstetter, Philipp Hauke
Despite the pristine abilities of analog quantum simulators to study quantum dynamics, possibilities to detect currents are sparse. Here, we propose a flexible non-invasive techniq…
From Non-Hermitian Linear Response to Dynamical Correlations and Fluctuation-Dissipation Relations in Quantum Many-Body Systems
Kevin T. Geier, Philipp Hauke
Quantum many-body systems are characterized by their correlations. While equal-time correlators and unequal-time commutators between operators are standard observables, the direct…
Exciting the Goldstone Modes of a Supersolid Spin-Orbit-Coupled Bose Gas
Kevin T. Geier, Giovanni I. Martone, Philipp Hauke +1
Supersolidity is deeply connected with the emergence of Goldstone modes, reflecting the spontaneous breaking of both phase and translational symmetry. Here, we propose accessible s…
Analog cosmological reheating in an ultracold Bose gas
Aleksandr Chatrchyan, Kevin T. Geier, Markus K. Oberthaler +2
Cosmological reheating describes the transition of the post-inflationary universe to a hot and thermal state. In order to shed light on the underlying dynamics of this process, we…