Single-atom transport in optical conveyor belts: Enhanced shortcuts-to-adiabaticity approach

Abstract

Fast and nearly lossless atomic transport, enabled by moving the confining trap, is a prerequisite for many quantum-technology applications. While theoretical studies of this problem have heretofore focussed almost exclusively on simplified scenarios (one-dimensional systems, purely harmonic confining potentials, etc.), we investigate it here in the experimentally relevant setting of a moving optical lattice ({\em optical conveyor belt}). We model single-atom transport in this system by taking fully into account its three-dimensional, anharmonic confining potential. We do so using the established method of shortcuts to adiabaticity (STA), i.e. an inverse-engineering approach based on Lewis-Riesenfeld invariants, as well as its recently proposed modification known as {\em enhanced} STA (eSTA). By combining well-controlled, advanced analytical techniques and the numerical propagation of a time-dependent Schrödinger equation using the Fourier split operator method, we evaluate atom-transport fidelities within both approaches. Being obtained for realistic choices of system parameters, our results are relevant for future experiments with optical conveyor belts. Moreover, they reveal that in the system at hand the eSTA method outperforms its STA counterpart for all but the lowest optical-lattice depths.

final, published version

References in corpus (14)

• Many-Body Physics with Individually-Controlled Rydberg Atoms
• Fast atomic transport without vibrational heating
• Coherence properties and quantum state transportation in an optical conveyor belt
• Deterministic loading of individual atoms to a high-finesse optical cavity
• Optimal transport of ultracold atoms in the non-adiabatic regime
• Hypersonic Bose-Einstein Condensates in Accelerator Rings
• Demonstration of quantum brachistochrones between distant states of an atom
• Submicrometer position control of single trapped neutral atoms
• Incommensurate superfluidity of bosons in a double-well optical lattice
• Scalable $W$-type entanglement resource in neutral-atom arrays with Rydberg-dressed resonant dipole-dipole interaction
• Conversion from $W$ to Greenberger-Horne-Zeilinger states in the Rydberg-blockade regime of neutral-atom systems: Dynamical-symmetry-based approach
• Superfluid drag of two-species Bose-Einstein condensates in optical lattices
• Speed, retention loss, and motional heating of atoms in an optical conveyor belt
• Fast and robust particle shuttling for quantum science and technology