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Displaying 1 - 3 of 3

Floquet engineering topological Dirac bands

July 22, 2022
Author(s)
Ian Spielman, Mingwu Lu, Amilson R. Fritsch, Graham Reid, Alina Pineiro Escalera
We experimentally realized a time-periodically modulated 1D lattice for ultracold atoms featuring a pair of linear bands, each associated with a Floquet winding number: a topological invariant. These bands are spin-momentum locked and almost perfectly

Creating solitonic excitations with controllable velocity in Bose-Einstein condensates

May 20, 2020
Author(s)
Amilson R. Fritsch, Mingwu Lu, Alina M. Pineiro Escalera, Graham H. Reid, Ian Spielman
Established techniques for deterministically creating dark solitons in repulsively interacting atomic Bose-Einstein condensates (BECs) can only access a narrow range of soliton velocities. Because velocity a ects the stability of individual solitons and

Exceeding the Sauter-Schwinger limit of pair production with a quantum gas

September 21, 2019
Author(s)
Alina M. Pineiro Escalera, Mingwu Lu, Dina Genkina, Ian Spielman
We quantum-simulated particle-antiparticle pair production with a bosonic quantum gas in an optical lattice by emulating the requisite 1d Dirac equation and uniform electric field. We emulated field strengths far in excess of Sauter-Schwinger's limit for