79 citations · 563 across the 27 of their papers we have counts for
26 papers · 1 filter
Real space mean-field theory of a spin-1 Bose gas in synthetic dimensions
Hilary M. Hurst, Justin H. Wilson, J. H. Pixley +2
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…
Competing ground states of strongly correlated bosons in the Harper-Hofstadter-Mott model
Stefan S. Natu, Erich J. Mueller, S. Das Sarma
Using an efficient cluster approach, we study the physics of two-dimensional lattice bosons in a strong magnetic field in the regime where the tunneling is much weaker than the on-…
Beliaev damping in quasi-2D dipolar condensates
Ryan M. Wilson, Stefan S. Natu
We study the effects of quasiparticle interactions in a quasi-two dimensional (quasi-2D), zero-temperature Bose-Einstein condensate of dipolar atoms, which can exhibit a roton-maxo…
Anomalous supersolidity in a weakly interacting dipolar Bose mixture on a square lattice
Ryan M. Wilson, Wilbur E. Shirley, Stefan S. Natu
We calculate the mean-field phase diagram of a zero-temperature, binary Bose mixture on a square optical lattice, where one species possesses a non-negligible dipole moment. Remark…
Interaction driven exotic quantum phases in spin-orbit coupled spin bosons
J. H. Pixley, Stefan S. Natu, I. B. Spielman +1
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…
Strong correlation effects in a two-dimensional Bose gas with quartic dispersion
Juraj Radic, Stefan S. Natu, Victor Galitski
Motivated by the fundamental question of the fate of interacting bosons in flat bands, we consider a two-dimensional Bose gas at zero temperature with an underlying quartic single-…
Bosons with long range interactions on two-leg ladders in artificial magnetic fields
Stefan S. Natu
Motivated by experiments exploring the physics of neutral atoms in artificial magnetic fields, we study the ground state of bosons interacting with long range dipolar interactions…
Static and Dynamic Properties of Interacting Spin-1 Bosons in an Optical Lattice
Stefan S. Natu, J. H. Pixley, S. Das Sarma
We study the physics of interacting spin- bosons in an optical lattice using a variational Gutzwiller technique. We compute the mean-field ground state wave-function and discuss…
Metastable Bose-Einstein Condensation in a Strongly Correlated Optical Lattice
David McKay, Ushnish Ray, Stefan Natu +3
We experimentally and theoretically study the peak fraction of a Bose-Einstein condensate loaded into a cubic optical lattice as the lattice potential depth and entropy per particl…
Striped Ferronematic ground states in a spin-orbit coupled Bose gas
Stefan S. Natu, Xiaopeng Li, William S. Cole
We theoretically establish the mean-field phase diagram of a homogeneous spin-, spin-orbit coupled Bose gas as a function of the spin-dependent interaction parameter, the Raman…
Stoner ferromagnetism in a thermal pseudospin-1/2 Bose gas
Juraj Radic, Stefan S. Natu, Victor Galitski
We compute the finite-temperature phase diagram of a pseudospin- Bose gas with contact interactions, using two complementary methods: the random phase approximation (RPA) and…
Chiral spin superfluidity and spontaneous spin Hall effect of interacting bosons
Xiaopeng Li, Stefan S. Natu, Arun Paramekanti +1
Recent experiments on ultracold atoms in optical lattices have synthesized a variety of tunable bands with degenerate double-well structures in momentum space. Such degeneracies in…
Coarsening dynamics of binary Bose condensates
Johannes Hofmann, Stefan S. Natu, S. Das Sarma
We study the dynamics of domain formation and coarsening in a binary Bose-Einstein condensate that is quenched across a miscible-immiscible phase transition. The late-time evolutio…
Dynamics of correlations in a quasi-2D dipolar Bose gas following a quantum quench
Stefan S. Natu, L. Campanello, S. Das Sarma
We study the evolution of correlations in a quasi-2D dipolar gas driven out-of-equilibrium by a sudden ramp of the interaction strength. For sufficiently strong ramps, the momentum…
Interaction-Tuned Dynamical Transitions in a Rashba Spin-Orbit Coupled Fermi Gas
Juraj Radic, Stefan S. Natu, Victor Galitski
We consider the time evolution of the magnetization in a Rashba spin-orbit-coupled Fermi gas, starting from a fully-polarized initial state. We model the dynamics using a Boltzmann…
Landau damping in a collisionless dipolar Bose gas
Stefan S. Natu, Ryan M. Wilson
We present a theory for the Landau damping of low energy quasi-particles in a collisionless, quasi-2D dipolar Bose gas and produce expressions for the damping rate in uniform and n…
Absence of damping of low energy excitations in a quasi-2D dipolar Bose gas
Stefan S. Natu, S. Das Sarma
We develop a theory of damping of low energy, collective excitations in a quasi-2D, homogenous, dipolar Bose gas at zero temperature, via processes whereby an excitation decays int…
Long time non-equilibrium dynamics of binary Bose condensates
Stefan S. Natu, S. Das Sarma
We explore the out-of-equilibrium temporal dynamics of demixing and phase separation in a two dimensional binary Bose fluid at zero temperature, following a sudden quench across th…
Spin dynamics in a spin-orbit coupled Fermi gas
Stefan S. Natu, S. Das Sarma
We study the dynamics of a non-degenerate, harmonically trapped Fermi gas following a sudden ramp of the spin-orbit coupling strength. In the non-interacting limit, we solve the Bo…
Dynamics of correlations in a dilute Bose gas following an interaction quench
Stefan S. Natu, Erich J. Mueller
We calculate the dynamics of the one and two body correlation functions in a homogeneous Bose gas at zero temperature following a sudden change in the interaction strength, with an…
Evolution of condensate fraction during rapid lattice ramps
Stefan S. Natu, David C. McKay, Brian DeMarco +1
Combining experiments and numerical simulations, we investigate the redistribution of quasi-momentum in a gas of atoms trapped in an optical lattice when the lattice depth is rapid…
Dynamics of correlations in shallow optical lattices
Stefan S. Natu, Erich J. Mueller
We explore how correlations evolve in a gas of lattice bosons when the lattice depth is rapidly reduced. We find a simple closed form expression for the static structure factor in…
Pairing, Ferromagnetism, and Condensation of a normal spin-1 Bose gas
Stefan S. Natu, Erich J. Mueller
We theoretically study the stability of a normal, spin disordered, homogenous spin-1 Bose gas against ferromagnetism, pairing, and condensation through a Random Phase Approximation…
Local versus global equilibration near the bosonic Mott-superfluid transition
Stefan S. Natu, Kaden R. A. Hazzard, Erich J. Mueller
We study the response of trapped two dimensional cold bosons to time dependent lattices. We find that in lattice ramps from 11 (superfluid, ms, $\hbar/J_{\t…