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Search Publications by: Ian Spielman (Fed)

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Displaying 76 - 100 of 206

Quantum Phases of Two-Component Bosons with Spin-Orbit Coupling in Optical Lattices

December 26, 2017
Author(s)
Ian B. Spielman, Carlos S? de Melo, Daisuke Yamamoto
Ultracold bosons in optical lattices are one of the few systems where bosonic matter is known to exhibit strong correlations. Here, to push the frontier of our understanding of interacting bosons in optical lattices, we add synthetic spin-orbit coupling

Quantum theory solved by experiment

May 18, 2017
Author(s)
Ian B. Spielman
Systems of quantum objects can be characterized by the correlations between the objects. A technique has been developed to precisely measure even the most delicate correlations, allowing theoretical models of quantum systems to be tested. See Schweigler et

Kinetic theory of dark solitons with tunable friction

May 3, 2017
Author(s)
Ian B. Spielman, Hilary Hurst, Victor Galitski
We study controllable friction in a system consisting of a dark soliton in a one-dimensional Bose- Einstein condensate coupled to a non-interacting Fermi gas. The fermions act as impurity atoms, not part of the original condensate, that scatter off of the

Bose-Einstein Condensates in Artificial Gauge Fields

May 1, 2017
Author(s)
Ian B. Spielman, Lindsay LeBlanc
Quantum mechanically, static or applied gauge fields manifest themselves by directly coupling to a system's phase. Artificial gauge field techniques manipulate the phase of a Bose-Einstein condensates's order parameter, yielding effects present in

Fourier transform spectroscopy of a spin-orbit coupled Bose gas

March 16, 2017
Author(s)
Ian B. Spielman, Erin Marshall, Dimitry Trypogeorgos, Ana ValdCuriel
We describe a Fourier transform spectroscopy technique for directly measuring band structures, and apply it to a spin-1 spin-orbit coupled Bose-Einstein condensate. In our technique, we suddenly change the systems Hamiltonian by adding a spin- orbit

Impurity driven Brownian motion of solitons in elon- gated Bose-Einstein Condensates

March 7, 2017
Author(s)
Ian B. Spielman, Lauren M. Aycock, Dina Genkina, Hsin I Lu, Hilary Hurst, Victor Galitski
Solitons, spatially-localized, propagating excitations resulting from an interplay be- tween nonlinearity and dispersion, are ubiquitous in physical systems from water channels1 and oceans2 to optical fibers3 and Bose- Einstein condensates (BECs)4. For the

Semisynthetic zigzag optical lattice for ultracold bosons

December 22, 2016
Author(s)
Ian B. Spielman, Gediminas Juzeli?nas, Christoph Str?ter, Andr? Eckardt, Mantas Ra?i?nas, Egidijus Anisimovas
We consider a one-dimensional "zigzag" lattice, pictured as a two-site wide single strip taken from a triangular lattice, affected by a tunable homogeneous magnetic flux piercing its triangular plaquettes. We focus on a semi-synthetic lattice produced by

Real space mean-field theory of a spin-1 Bose gas in synthetic dimensions

December 15, 2016
Author(s)
Ian B. Spielman, Justin H. Wilson, Hilary Hurst, Jed Pixley, Stefan Natu
The internal degrees of freedom provided by ultracold atoms give a route for realizing higher dimensional physics in systems with limited spatial dimensions. Non-spatial degrees of freedom in these systems are dubbed “synthetic dimensions”. This connection

Synthetic gauge potentials for ultracold neutral atoms

November 23, 2016
Author(s)
Ian B. Spielman, Yu-Ju Lin
Synthetic gauge fields for ultracold neutral atoms—engineered using the interaction between laser fields and the atoms' internal 'spin' degrees of freedom—provide promising techniques for generating the large (synthetic) magnetic fields required to reach

Vortex nucleation in a BoseEinstein condensate: from the inside out

November 23, 2016
Author(s)
Ian B. Spielman, Daniel Campbell, Ryan Price, Andika Putra, Dimitrius Trypogeorgos, Ana Vald?Curiel
We observed a new mechanism for vortex nucleation in Bose–Einstein condensates (BECs) subject to synthetic magnetic fields. We made use of a strong synthetic magnetic field initially localized between a pair of merging BECs to rapidly create vortices in

Geometrical pumping with a Bose-Einstein condensate

May 20, 2016
Author(s)
Lauren M. Aycock, Dina Genkina, Seiji Sugawa, Max Schemmer, Hsin I Lu, Ian Spielman
We realized a quantum "charge" pump for a Bose-Einstein condensate (BEC) in a novel bipartite magnetic lattice, whose bands are characterized by non-trivial topological invariants: the Zak phases. For each band, the Zak phase is determined by that band's

Interaction driven exotic quantum phases in spin-orbit coupled lattice spin?1 bosons

May 19, 2016
Author(s)
Ian B. Spielman, Jedediah Pixley, Stefan Natu, Sankar Das Sarma
We study the interplay between large-spin, spin-orbit coupling, and superfluidity for bosons in a two dimensional optical lattice, focusing on the spin-1 spin-orbit coupled system recently realized at the Joint Quantum Institute [Campbell et. al., arXiv