Bose-Einstein Condensate in a Uniform Light-Induced Vector Potential

Abstract

We use a two-photon dressing field to create an effective vector gauge potential for Bose-Einstein-condensed 87Rb atoms in the F=1 hyperfine ground state. These Raman-dressed states are spin and momentum superpositions, and we adiabatically load the atoms into the lowest energy dressed state. The effective Hamiltonian of these neutral atoms is like that of charged particles in a uniform magnetic vector potential whose magnitude is set by the strength and detuning of the Raman coupling. The spin and momentum decomposition of the dressed states reveals the strength of the effective vector potential, and our measurements agree quantitatively with a simple single-particle model. While the uniform effective vector potential described here corresponds to zero magnetic field, our technique can be extended to nonuniform vector potentials, giving nonzero effective magnetic fields.

Thermodynamic properties of rotating trapped ideal Bose gases

“…In this case, atoms behave like charged particles in magnetic field. The "synthetic" magnetic field has already been realized in experiments and can be produced significantly large, which makes it hopefully to achieve the fast-rotating limit [14][15][16].…”

“…More recently, the so-called "synthetic" magnetic field approach is developed [14][15][16], which creates an effective gauge potential A for neutral atoms by means of optical field [17][18][19], instead of rotating the frame. In this case, atoms behave like charged particles in magnetic field.…”

Topological phases of lattice bosons with a dynamical gauge field

“…The gauge field imprints a complex U(1) phase onto the wave function of the particle. The synthetic implementation of this mechanism in cold atomic systems has been envisaged since the early days of quantum gases [1][2][3][4][5][6][7], and has been realized successfully during recent years [8][9][10][11][12][13]. Current quantum simulations with artificial gauge potentials are exploring the variety of interesting physics related to background gauge fields: spin liquid phases [14], topological phases evidenced by nonzero Chern numbers [15], or quantum Hall phases with edge currents [16,17].…”

Moving obstacle potential in a spin-orbit-coupled Bose-Einstein condensate

“…The successful experimental realization of various synthetic gauge fields and spin-orbit coupling (SOC) in BoseEinstein condensates (BECs) has recently drawn considerable theoretical attention [1][2][3][4][5][6][7][8][9][10], with a number of studies addressing the ground state structures and static properties of topological excitations (for recent reviews, see, for example, Refs. [11][12][13]).…”