Roton in a few-body dipolar system
arXiv:1801.06586 · doi:10.1088/1367-2630/aaf295
Abstract
We solve numerically exactly the many-body 1D model of bosons interacting via short-range and dipolar forces and moving in the box with periodic boundary conditions. We show that the lowest energy states with fixed total momentum can be smoothly transformed from the typical states of collective character to states resembling single particle excitations. In particular, we identify the celebrated roton state. The smooth transition is realized by simultaneous tuning short-range interactions and adjusting a trap geometry. With our methods we study the weakly interacting regime as well as the regime beyond the range of validity of the Bogoliubov approximation.
arXiv comment7 pages, 4 figures
References in corpus (59)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Three qubits can be entangled in two inequivalent ways
- Entanglement, Non-linear Dynamics, and the Heisenberg Limit
- Roton-maxon spectrum and stability of trapped dipolar condensates
- Spatial quantum noise interferometry in expanding ultracold atom clouds
- One-Dimensional Quantum Liquids: Beyond the Luttinger Liquid Paradigm
- Deterministic Preparation of a Tunable Few-Fermion System
- Camparison of the Hanbury Brown-Twiss effect for bosons and fermions
- Hanbury Brown Twiss effect for ultracold quantum gases
- Extended Bose-Hubbard Models with Ultracold Magnetic Atoms
- A superfluid-droplet crystal and a free-space supersolid in a dipole-blockaded gas
- Observation of Roton Mode Population in a Dipolar Quantum Gas
- Radial and angular rotons in trapped dipolar gases
- Quantum phase transition in a two-dimensional system of dipoles
- Observations of density fluctuations in an elongated Bose gas: ideal gas and quasi-condensate regimes
- Beyond Tonks-Girardeau: strongly correlated regime in quasi-one-dimensional Bose gases
- Few-body physics with ultracold atomic and molecular systems in traps
- Dynamical density-density correlations in the one-dimensional Bose gas
- Stability of quasi-two-dimensional Bose-Einstein condensates with dominant dipole-dipole interactions
- Rotons in gaseous Bose-Einstein condensates irradiated by a laser
- Probing the Excitations of a Lieb-Liniger Gas from Weak to Strong Coupling
- Manifestations of the Roton Mode in Dipolar Bose-Einstein Condensates
- The Yrast Spectra of Weakly Interacting Bose-Einstein Condensates
- Energetics and Structural Properties of Trapped Two-Component Fermi Gases
- Structure formation during the collapse of a dipolar atomic Bose-Einstein condensate
- Roton spectroscopy in a harmonically trapped dipolar Bose-Einstein condensate
- Realization of a Strongly Interacting Fermi Gas of Dipolar Atoms
- Critical superfluid velocity in a trapped dipolar gas
- Topological Winding and Unwinding in Metastable Bose-Einstein Condensates
- Controlling interactions between highly-magnetic atoms with Feshbach resonances
- Faraday patterns in dipolar Bose-Einstein condensates
- Super-Tonks-Girardeau regime in trapped one-dimensional dipolar gases
- Two trapped particles interacting by a finite-ranged two-body potential in two spatial dimensions
- Roton confinement in trapped dipolar Bose-Einstein condensates
- Lieb-Liniger model: emergence of dark solitons in the course of measurements of particle positions
- Roton excitations in a trapped dipolar Bose-Einstein condensate
- Many-body tunneling dynamics of Bose-Einstein condensates and vortex states in two spatial dimensions
- Local atom-number fluctuations in quantum gases at finite temperature
- Fingerprinting Rotons in a Dipolar Condensate: Super-Poissonian Peak in the Atom-Number Fluctuations
- Finite temperature analysis of a quasi2D dipolar gas
- Effective-interaction approach to the many-boson problem
- Super Tonks-Girardeau state in an attractive one-dimensional dipolar gas
- Stability and structure of an anisotropically trapped dipolar Bose-Einstein condensate: angular and linear rotons
- Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation
- Depletion and fluctuations of a trapped dipolar Bose-Einstein condensate in the roton regime
- Nucleation in finite topological systems during continuous metastable quantum phase transitions
- The -wave scattering length of a Gaussian potential
- Single-shot simulations of dynamics of quantum dark solitons
- How Does a Dipolar Bose-Einstein Condensate Collapse?
- Finite-temperature trapped dipolar Bose gas
- The low-energy excitation spectrum of one-dimensional dipolar quantum gases
- Quantum Monte Carlo study of the dynamic structure factor in the gas and crystal phase of hard-sphere bosons
- Dynamics of correlations in a quasi-2D dipolar Bose gas following a quantum quench
- Stability Spectroscopy of Rotons in a Dipolar Bose Gas
- Finite temperature stability of a trapped dipolar Bose gas
- Beyond mean-field dynamics of ultra-cold bosonic atoms in higher dimensions: facing the challenges with a multi-configurational approach
- Ultracold bosonic scattering dynamics off a repulsive barrier: coherence loss at the dimensional crossover
- Many-body soliton-like states of the bosonic ideal gas
- Exact Diagonalization Study of Bose-Condensed Gas with Finite-Range Gaussian Interaction