Designs of magnetic atom-trap lattices for quantum simulation experiments

Abstract

We have designed and realized magnetic trapping geometries for ultracold atoms based on permanent magnetic films. Magnetic chip based experiments give a high level of control over trap barriers and geometric boundaries in a compact experimental setup. These structures can be used to study quantum spin physics in a wide range of energies and length scales. By introducing defects into a triangular lattice, kagome and hexagonal lattice structures can be created. Rectangular lattices and (quasi-)one-dimensional structures such as ladders and diamond chain trapping potentials have also been created. Quantum spin models can be studied in all these geometries with Rydberg atoms, which allow for controlled interactions over several micrometers. We also present some nonperiodic geometries where the length scales of the traps are varied over a wide range. These tapered structures offer another way to transport large numbers of atoms adiabatically into subwavelength traps and back.

3D permanent magnetic lattices for ultracold atoms

“…Periodic arrays of magnetic microtraps created by arrays of current-carrying wires [11,12] and permanent magnetic slabs [13][14][15][16][17][18][19][20] have been introduced for trapping and manipulating ultracold atoms. They have been used in fundamental researches on ultracold atoms including quantum degenerate gases and BECs [21].…”

Frustrated magnetism of spin-1/2 Heisenberg diamond and octahedral chains as a statistical-mechanical monomer-dimer problem

“…A closely related extended magnetic structure with the architecture of a three-dimensional network of corner-sharing octahedra {Cu 6 } is for instance realized in the copper-based metal-organic framework [Cu 3 (tpt) 4 ](ClO 4 ) 3 [41]. Last but not least, an artificial design of the spin-1/2 Heisenberg octahedral chain achieved through magnetic atom-trap lattices is also feasible with regard to a recent successful realization of several related one-dimensional magnetic structures such as ladders and diamond spin chains [42].…”

Relaxation of ferromagnetic domains in a disordered lattice in 2D

“…Motivated by the notable control achieved with large conglomerates of atoms in its quantum degenerate state, and particularly the production of mixtures composed of either, Bose condensates in different hyperfine states [6], or different atomic species [7][8][9][10][11], confined in particular geometries [12][13][14][15][16], we propose here the design of an ultracold atom device to quantum simulate the decay of magnetization in magnetic domains in disordered square lattices in 2D. Our proposal is based on various experimental situations, previously performed with 87 Rb atoms, intended to explore the many-body localization phenomenon [17,18].…”