Laser cooling trapped-ion crystal modes beyond the Lamb-Dicke regime

• URL: http://arxiv.org/abs/2411.18818v1
• Date: Wed, 27 Nov 2024 23:42:53 GMT
• Title: Laser cooling trapped-ion crystal modes beyond the Lamb-Dicke regime
• Authors: John P. Bartolotta, Brian Estey, Michael Foss-Feig, David Hayes, Christopher N. Gilbreth,
• Abstract summary: We construct a non-perturbative, semiclassical method for predicting the energy-dependent cooling dynamics of trapped-ion crystals. Our method complements fully quantum models by allowing for fast and accurate predictions of laser-cooling dynamics at much higher energy scales.
• Score: 0.0
• License:
• Abstract: Laser cooling methods for trapped ions are most commonly studied at low energies, i.e., in the Lamb-Dicke regime. However, ions in experiments are often excited to higher energies for which the Lamb-Dicke approximation breaks down. Here we construct a non-perturbative, semiclassical method for predicting the energy-dependent cooling dynamics of trapped-ion crystals with potentially many internal levels and motional modes beyond the Lamb-Dicke regime. This method allows accurate and efficient modeling of a variety of interesting phenomena, such as the breakdown of EIT cooling at high energies and the simultaneous cooling of multiple high-temperature modes. We compare its predictions both to fully-quantum simulations and to experimental data for a broadband EIT cooling method on a Raman $S$-$D$ transition in $^{138}$Ba${^+}$. We find the method can accurately predict cooling rates over a wide range of energies relevant to trapped ion experiments. Our method complements fully quantum models by allowing for fast and accurate predictions of laser-cooling dynamics at much higher energy scales.

Related papers

• Indirect Cooling of Weakly Coupled Trapped-Ion Mechanical Oscillators [0.0]
  Cooling the motion of trapped ions to near the quantum ground state is crucial for many applications in quantum information processing. We overcome this challenge by coupling a mode with weak cooling radiation interaction to one with strong cooling radiation interaction. We demonstrate near-ground-state cooling of motional modes with weak or zero cooling radiation interaction in multi-ion crystals of the same and mixed ion species.
  arXiv  Detail & Related papers  (2023-08-09T18:00:54Z)
• Quantum emulation of the transient dynamics in the multistate Landau-Zener model [50.591267188664666]
  We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity. Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
  arXiv  Detail & Related papers  (2022-11-26T15:04:11Z)
• Photoinduced prethermal order parameter dynamics in the two-dimensional large-$N$ Hubbard-Heisenberg model [77.34726150561087]
  We study the microscopic dynamics of competing ordered phases in a two-dimensional correlated electron model. We simulate the light-induced transition between two competing phases.
  arXiv  Detail & Related papers  (2022-05-13T13:13:31Z)
• Parallel-Electromagnetically-Induced-Transparency Near Ground-State Cooling of a Trapped-ion Crystal [15.436462186060728]
  We experimentally demonstrate a parallel-electromagnetically-induced transparency (parallel-EIT) cooling technique for ion crystals in the Paul trap. It has less stringent requirements on the cooling resonance condition than the standard electromagnetically-induced transparency (EIT) cooling. A proof-of-principle validation for this cooling scheme is experimentally demonstrated with up to 4 trapped 40Ca+ ions.
  arXiv  Detail & Related papers  (2021-12-02T07:40:03Z)
• Engineering the Radiative Dynamics of Thermalized Excitons with Metal Interfaces [58.720142291102135]
  We analyze the emission properties of excitons in TMDCs near planar metal interfaces. We find suppression or enhancement of emission relative to the point dipole case by several orders of magnitude. nanoscale optical cavities are a viable pathway to generating long-lifetime exciton states in TMDCs.
  arXiv  Detail & Related papers  (2021-10-11T19:40:24Z)
• Optimized pulsed sideband cooling and enhanced thermometry of trapped ions [0.0]
  We introduce a framework which calculates the fastest possible pulsed sideband cooling sequence for a given number of pulses. After extensive cooling, we find that the ion motional distribution is distinctly non-thermal. These techniques will enable more efficient cooling and thermometry within trapped-ion systems.
  arXiv  Detail & Related papers  (2021-07-25T13:37:37Z)
• Prospects for single photon sideband cooling of optically trapped neutral atoms [0.0]
  We propose a novel cooling scheme for realising single photon sideband cooling on particles trapped in a state-dependent optical potential. We develop a master rate equation from an ab-initio model and find that it is possible to drastically reduce the average occupation number of the vibrational levels. Our findings provide an alternative cooling scheme that can be applied in principle to any particle.
  arXiv  Detail & Related papers  (2021-07-08T21:24:35Z)
• A scalable helium gas cooling system for trapped-ion applications [51.715517570634994]
  A modular cooling system is presented for use with multiple ion-trapping experiments simultaneously. The cooling system is expected to deliver a net cooling power of 111 W at 70 K to up to four experiments.
  arXiv  Detail & Related papers  (2021-06-14T16:37:54Z)
• Fast Laser Cooling Using Optimal Quantum Control [11.815965846475027]
  State of the art cooling schemes often work under a set of optimal cooling conditions derived analytically. We show that faster cooling can be achieved while at the same time a low average phonon occupation can be retained.
  arXiv  Detail & Related papers  (2021-06-10T01:01:18Z)
• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic [52.77024349608834]
  We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes. We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies. We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
  arXiv  Detail & Related papers  (2021-02-24T17:46:15Z)
• Adiabatic Sensing Technique for Optimal Temperature Estimation using Trapped Ions [64.31011847952006]
  We propose an adiabatic method for optimal phonon temperature estimation using trapped ions. The relevant information of the phonon thermal distributions can be transferred to the collective spin-degree of freedom. We show that each of the thermal state probabilities is adiabatically mapped onto the respective collective spin-excitation configuration.
  arXiv  Detail & Related papers  (2020-12-16T12:58:08Z)

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.