17 citations · 37 across the 11 of their papers we have counts for
9 papers · 1 filter
Hysteresis in Atomic Josephson Junctions
Vijay Pal Singh, Ludwig Mathey, Luigi Amico
Hysteresis and retrapping are hallmarks of underdamped Josephson dynamics, yet they have remained elusive in atomic Josephson junctions. Here, we introduce a velocity-sweep protoco…
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…
Controlled generation of 3D vortices in driven atomic Josephson junctions
Vijay Pal Singh, Ludwig Mathey, Herwig Ott +1
We propose an ac-driven atomic Josephson junction as a clean and tunable source of three dimensional (3D) solitary waves in quantum fluids. Depending on the height of the junction…
Weak-link to tunneling crossover in an atomic Josephson junction
Vijay Pal Singh, Erik Bernhart, Marvin Röhrle +3
We present a unified, quantitative description of transport across the crossover between hydrodynamic weak-link flow and tunneling-dominated Josephson dynamics in a three-dimension…
Josephson Dynamics in 2D Ring-shaped Condensates
Koon Siang Gan, Vijay Pal Singh, Luigi Amico +1
We investigate Josephson transport in a fully closed, two-dimensional superfluid circuit formed by a ring-shaped 87Rb Bose-Einstein condensate that contains two optical barriers ac…
Atomic Josephson Parametric Amplifier
Vijay Pal Singh, Luigi Amico, Ludwig Mathey
We study the dynamics of a driven atomic Josephson junction that we propose as a parametric amplifier. By periodically modulating the position of the barrier, we induce a small cur…
Persistent currents in ultracold gases
Juan Polo, Wayne Jordan Chetcuti, Tobias Haug +3
Persistent currents flowing in spatially closed tracks define one of the most iconic concepts in mesoscopic physics. They have been studied in solid-state platforms such as superfl…
Shapiro steps in strongly-interacting Fermi gases
Giulia Del Pace, Diego Hernández-Rajkov, Vijay Pal Singh +7
We report the observation of Shapiro steps in a periodically driven Josephson junction between strongly-interacting Fermi superfluids of ultracold atoms. We observe quantized plate…
Observation of Shapiro steps in an ultracold atomic Josephson junction
Erik Bernhart, Marvin Röhrle, Vijay Pal Singh +3
The current-voltage characteristic of a driven superconducting Josephson junction displays discrete steps. This phenomenon, called the Shapiro steps, forms today's voltage standard…