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

• URL: http://arxiv.org/abs/2108.10336v3
• Date: Wed, 17 Nov 2021 18:58:35 GMT
• Title: Single-atom transport in optical conveyor belts: Enhanced shortcuts-to-adiabaticity approach
• Authors: Sascha H. Hauck, Gernot Alber, Vladimir M. Stojanovic
• Abstract summary: atomic transport, enabled by moving the confining trap, is a prerequisite for many quantum-technology applications. 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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 Schr\"{o}dinger 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.

Related papers

• Dynamical Measure Transport and Neural PDE Solvers for Sampling [77.38204731939273]
  We tackle the task of sampling from a probability density as transporting a tractable density function to the target. We employ physics-informed neural networks (PINNs) to approximate the respective partial differential equations (PDEs) solutions. PINNs allow for simulation- and discretization-free optimization and can be trained very efficiently.
  arXiv  Detail & Related papers  (2024-07-10T17:39:50Z)
• Path integral Lindblad master equation through transfer tensor method & the generalized quantum master equation [0.0]
  This communication presents an approach of incorporating processes within an exact path integral description of other dissipative modes. The cost of this approach is dominated by the cost of the path integral method used, and the impact of the Lindbladian terms is effectively obtained for free.
  arXiv  Detail & Related papers  (2024-02-13T15:15:48Z)
• Determinant and Derivative-Free Quantum Monte Carlo Within the Stochastic Representation of Wavefunctions [0.0]
  Describing the ground states of continuous, real-space quantum many-body systems is a significant computational challenge. Recent progress was made by variational methods based on machine learning (ML) ansatzes. We argue that combining SRW with path integral techniques leads to a new formulation that overcomes all three problems simultaneously.
  arXiv  Detail & Related papers  (2024-02-09T17:51:32Z)
• A Lindblad master equation capable of describing hybrid quantum systems in the ultra-strong coupling regime [0.0]
  We show an approach that can describe the dynamics of hybrid quantum systems in any regime of interaction for an arbitrary electromagnetic (EM) environment. We extend a previous method developed for few-mode quantization of arbitrary systems to the case of ultrastrong light-matter coupling. We show that it outperforms current state-of-the-art master equations for a simple model system, and then study a realistic nanoplasmonic setup where existing approaches cannot be applied.
  arXiv  Detail & Related papers  (2023-05-22T15:59:53Z)
• D4FT: A Deep Learning Approach to Kohn-Sham Density Functional Theory [79.50644650795012]
  We propose a deep learning approach to solve Kohn-Sham Density Functional Theory (KS-DFT) We prove that such an approach has the same expressivity as the SCF method, yet reduces the computational complexity. In addition, we show that our approach enables us to explore more complex neural-based wave functions.
  arXiv  Detail & Related papers  (2023-03-01T10:38:10Z)
• Third quantization of open quantum systems: new dissipative symmetries and connections to phase-space and Keldysh field theory formulations [77.34726150561087]
  We reformulate the technique of third quantization in a way that explicitly connects all three methods. We first show that our formulation reveals a fundamental dissipative symmetry present in all quadratic bosonic or fermionic Lindbladians. For bosons, we then show that the Wigner function and the characteristic function can be thought of as ''wavefunctions'' of the density matrix.
  arXiv  Detail & Related papers  (2023-02-27T18:56:40Z)
• Coherent Atom Transport via Enhanced Shortcuts to Adiabaticity: Double-Well Optical Lattice [0.0]
  We study fast atomic transport in a moving em double-well optical lattice. We use two classes of quantum-control methods: shortcuts to adiabaticity (STA) and enhanced STA. This study has direct implications for neutral-atom quantum computing.
  arXiv  Detail & Related papers  (2021-12-28T08:39:49Z)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Shortcuts to adiabaticity for open quantum systems and a mixed-state inverse engineering scheme [0.3058685580689604]
  We present the shortcuts to adiabaticity (STAs) of open quantum systems. We then apply the STAs to speed up the adiabatic steady process. Our scheme drives open systems from a initial steady state to a target steady state by a controlled Liouvillian.
  arXiv  Detail & Related papers  (2021-03-23T06:14:34Z)
• Assessment of weak-coupling approximations on a driven two-level system under dissipation [58.720142291102135]
  We study a driven qubit through the numerically exact and non-perturbative method known as the Liouville-von equation with dissipation. We propose a metric that may be used in experiments to map the regime of validity of the Lindblad equation in predicting the steady state of the driven qubit.
  arXiv  Detail & Related papers  (2020-11-11T22:45:57Z)
• Method of spectral Green functions in driven open quantum dynamics [77.34726150561087]
  A novel method based on spectral Green functions is presented for the simulation of driven open quantum dynamics. The formalism shows remarkable analogies to the use of Green functions in quantum field theory. The method dramatically reduces computational cost compared with simulations based on solving the full master equation.
  arXiv  Detail & Related papers  (2020-06-04T09:41:08Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.