11 citations · 44 across the 8 of their papers we have counts for
8 papers
Low-Energy Purification of Crystal Defects by Rydberg Excitons
Shiva Kant Tiwari, Tijs Karman, Valentin Walther
Recent experiments show that optically generated Rydberg excitons in cuprous oxide can neutralize charged impurities, strongly reducing stray electric fields and effectively purify…
Attosecond Control of Squeezed Light
Russell Zimmerman, Shashank Kumar, Shiva Kant Tiwari +9
Squeezed light is a key resource in quantum metrology and quantum information science. It is primarily generated through nonlinear optical interactions, where the degree of squeezi…
Collapse of a quantum vortex in an attractive two-dimensional Bose gas
Sambit Banerjee, Kai Zhou, Shiva Kant Tiwari +6
We experimentally and numerically study the collapse dynamics of a quantum vortex in a two-dimensional atomic superfluid following a fast interaction ramp from repulsion to attract…
In situ observation of chemistry in Rydberg molecules within a coherent solvent
Felix Engel, Shiva Kant Tiwari, Tilman Pfau +2
We often infer the state of systems in nature indirectly, for example, in high-energy physics by the interaction of particles with an ambient medium. We adapt this principle to ene…
Dynamics of atoms within atoms
S. Tiwari, F. Engel, M. Wagner +3
Recent experiments with Bose-Einstein condensates have entered a regime in which thousands of ground-state condensate atoms fill the Rydberg-electron orbit. After the excitation of…
Imaging the interface of a qubit and its quantum-many-body environment
S. Rammohan, S. Tiwari, A. Mishra +5
Decoherence affects all quantum systems, natural or artificial, and is the primary obstacle impeding quantum technologies. We show theoretically that for a Rydberg qubit in a Bose…
Generation and decoherence of soliton spatial superposition states
Abhijit Pendse, Shruti Shirol, Shivakant Tiwari +1
Due to their coherence properties, dilute atomic gas Bose-Einstein condensates seem a versatile platform for controlled creation of mesoscopically entangled states with a large num…
Tracking Rydberg atoms with Bose-Einstein Condensates
Shiva Kant Tiwari, Sebastian Wüster
We propose to track position and velocity of mobile Rydberg excited impurity atoms through the elastic interactions of the Rydberg electron with a host condensate. Tracks first occ…