Designing arbitrary one-dimensional potentials on an atom chip

Abstract

We use laser light shaped by a digital micro-mirror device to realize arbitrary optical dipole potentials for one-dimensional (1D) degenerate Bose gases of 87 Rb trapped on an atom chip. Superposing optical and magnetic potentials combines the high flexibility of optical dipole traps with the advantages of magnetic trapping, such as effective evaporative cooling and the application of radio-frequency dressed state potentials. As applications, we present a 160 µm long box-like potential with a central tuneable barrier, a box-like potential with a sinusoidally modulated bottom and a linear confining potential. These potentials provide new tools to investigate the dynamics of 1D quantum systems and will allow us to address exciting questions in quantum thermodynamics and quantum simulations.

Generalized hydrodynamics with dephasing noise

“…, which is ubiquitous in describing the state-of-the-art cold-atom experiments [38,[79][80][81][82][83][84][85]. Atom chips [61] are routinely used to manipulate 1d atomic gases, in view of their ability of creating customizable external traps [86]. However, imperfections in the chip's fabrication [62], and in particular fluctuations in the currents of the device [61], result in spatially smooth and time-uncorrelated fluctuations of the external trap (Fig.…”

Josephson oscillations in split one-dimensional Bose gases

“…It therefore would be very interesting to repeat the experiments [10,14,15] in a hard-wall box potential. Such potentials are indeed under development [12,16] and our model can serve as a direct theoretical prediction for such setups.…”

“…Over the last decade and a half quasi-one-dimensional Bose gases have provided a key platform for experimental studies of non-equilibrium evolution in isolated one-dimensional manyparticle quantum systems, see e.g. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. This has been an important driver of intense theoretical activities aimed at understanding non-equilibrium dynamics in paradigmatic models in D = 1, see [17][18][19][20][21][22] for recent reviews on the subject.…”

Report on scipost_202005_00003v1

“…However, the calculations using the box potential presented here may gain additional relevance when more experiments using a box potential, such as Refs. [69,70], are performed.…”