Effective preparation and collisional decay of atomic condensate in excited bands of an optical lattice

Abstract

We present a method for the effective preparation of a Bose-Einstein condensate (BEC) into the excited bands of an optical lattice via a standing-wave pulse sequence. With our method, the BEC can be prepared in either a single Bloch state in a excited-band, or a coherent superposition of states in different bands. Our scheme is experimentally demonstrated by preparing a ${}^{87}$Rb BEC into the $d$-band and the superposition of $s$- and $d$-band states of a one-dimensional optical lattice, within a few tens of microseconds. We further measure the decay of the BEC in the $d$-band state, and carry an analytical calculation for the collisional decay of atoms in the excited-band states. Our theoretical and experimental results consist well.

9 pages, 5 figures, Accepted by Phys. Rev. A

References in corpus (5)

• Many-Body Physics with Ultracold Gases
• Orbital superfluidity in the $P$-band of a bipartite optical square lattice
• State preparation and dynamics of ultracold atoms in higher lattice orbitals
• Prediction of quantum stripe ordering in optical lattices
• Creation on demand of higher orbital states in a vibrating optical lattice

Cited by in corpus (27)

• Physics of higher orbital bands in optical lattices: a review
• XYZ quantum Heisenberg models with p-orbital bosons
• Shortcut loading atoms into an optical lattice
• Echo-Ramsey Interferometry with Motional Quantum States
• Bath-induced band decay of a Hubbard lattice gas
• Observation of quantum dynamical oscillations of ultracold atoms in the F and D bands of an optical lattice
• Excitation of atoms in an optical lattice driven by polychromatic amplitude modulation
• Bloch oscillations of spin-orbit-coupled cold atoms in an optical lattice and spin current generation
• Superfluid phases of fermions with hybridized $s$ and $p$ orbitals
• Rotation-symmetry-enforced coupling of spin and angular momentum for p-orbital bosons
• Atomic momentum patterns with narrower interval
• Optimal lattice depth on lifetime of D-band ultracold atoms in a triangular optical lattice
• Direct cooling in an optical lattice by amplitude modulation
• The dominant scattering channel induced by two-body collision of D-band atoms in triangular optical lattice
• Phases of d-orbital bosons in optical lattices
• Transport of ultracold atoms in superpositions of S- and D-band states in a moving optical lattice
• Selective population of a large-angular-momentum state in an optical lattice
• Study to improve the performance of interferometer with ultra-cold atoms
• Matter-wave interferometers with trapped strongly interacting Feshbach molecules
• Crystalline Splitting of $d$ Orbitals in Regular Optical Lattices
• Controlling higher-orbital quantum phases of ultracold atoms via coupling to optical cavities
• Scattering halos in strongly interacting Feshbach molecular Bose-Einstein condensates
• Fast and selective inter-band transfer of ultracold atoms in bichromatic lattices permitting Dirac points
• Topological orbital superfluid with chiral d-wave order in a rotating optical lattice
• Loading ultracold atoms onto nonlinear Bloch states and soliton states in bichromatic lattices
• Dimension Crossing Turbulent Cascade in an Excited Lattice Bose Gas
• Collisional scattering of strongly interacting D-band Feshbach molecules in optical lattices