RF-induced heating dynamics of non-crystallized trapped ions

• URL: http://arxiv.org/abs/2104.10623v1
• Date: Wed, 21 Apr 2021 16:31:53 GMT
• Title: RF-induced heating dynamics of non-crystallized trapped ions
• Authors: Martin W. van Mourik, Pavel Hrmo, Lukas Gerster, Benjamin Wilhelm, Rainer Blatt, Philipp Schindler, Thomas Monz
• Abstract summary: Melted ions form a medium for non-conservative energy transfer from the radio-frequency field to the ions. We derive a model for the energy dynamics of ion-ion collisions in a Paul trap. We generalize which experimental parameters are required for efficient recrystallization of melted trapped ions.
• Score: 1.4675095722281566
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate the energy dynamics of non-crystallized (melted) ions, confined in a Paul trap. The non-periodic Coulomb interaction experienced by melted ions forms a medium for non-conservative energy transfer from the radio-frequency (rf) field to the ions, a process known as rf heating. We study rf heating by analyzing numerical simulations of non-crystallized ion motion in Paul trap potentials, in which the energy of the ions' secular motion changes at discrete intervals, corresponding to ion-ion collisions. The analysis of these collisions is used as a basis to derive a simplified model of rf heating energy dynamics, from which we conclude that the rf heating rate is predominantly dependent on the rf field strength. We confirm the predictability of the model experimentally: Two trapped $^{40}$Ca$^{+}$ ions are deterministically driven to melt, and their fluorescence rate is used to infer the ions' energy. From simulation and experimental results, we generalize which experimental parameters are required for efficient recrystallization of melted trapped ions.

Related papers

• Condensation phenomena of ions in an electrostatic logarithmic trap [0.0]
  Collapse of ions in radially localized states, about the axial cathode, is shown to cause an abrupt transition from non degeneration to strong degeneration. This transition could actually involve both Bosons and Fermions and is not to be confused with a Bose-Einstein condensation (BEC) This is because the ion-ion emphexchange interactions increase the kinetic energy along the axial cathode, which makes the Fermi level and the non degeneration threshold temperature increase accordingly.
  arXiv  Detail & Related papers  (2024-10-02T14:17:00Z)
• Measurement-Induced Heating of Trapped Ions [0.0]
  We experimentally study the heating of trapped atomic ions during measurement of their internal qubit states. We observe that ions in the fluorescing state rapidly scatter photons and heat at a rate of mbox$dotbarngtrsim 2times 104$ quanta/s.
  arXiv  Detail & Related papers  (2024-04-14T18:58:37Z)
• Quantum Control of Atom-Ion Charge Exchange via Light-induced Conical Intersections [66.33913750180542]
  Conical intersections are crossing points or lines between two or more adiabatic electronic potential energy surfaces. We predict significant or measurable non-adiabatic effects in an ultracold atom-ion charge-exchange reaction. In the laser frequency window, where conical interactions are present, the difference in rate coefficients can be as large as $10-9$ cm$3$/s.
  arXiv  Detail & Related papers  (2023-04-15T14:43:21Z)
• Adiabatically controlled motional states of a ground-state cooled CaO$^{+}$ and Ca$^{+}$ trapped ion chain [6.1524835590475]
  Control of the external degree of freedom of trapped molecular ions is a prerequisite for their promising applications to spectroscopy, precision measurements of fundamental constants, and quantum information technology. We demonstrate near ground-state cooling of the axial motional modes of a calcium mono-oxide ion via sympathetic sideband cooling with a co-trapped calcium ion.
  arXiv  Detail & Related papers  (2022-12-09T20:07:01Z)
• Fluorescence calorimetry of an ion crystal [21.67214358685156]
  Motivated by the challenge of identifying intruder ions in a cold ion crystal, we investigate calorimetry from emitted fluorescence light. We argue that an energy change by an incoming $229$Th$10+$ ion can be unambiguously detected within 100 $mu$s via illuminating a fraction of a 10$3$ ion crystal.
  arXiv  Detail & Related papers  (2022-04-13T17:05:24Z)
• Ion-molecule reactions below 1~K: Observation of a strong enhancement of the reaction rate of the ion-dipole reaction He$^+$+ CH$_3$F [55.41644538483948]
  Reaction between He$+$ and CH$_3$F forming predominantly CH$+$ and CHF$+$. To avoid heating of the ions by stray electric fields, the reaction was observed within the orbit of a highly excited Rydberg electron.
  arXiv  Detail & Related papers  (2021-12-22T17:32:43Z)
• Temperature estimation of an entangled pair of trapped ions [0.0]
  We introduce a simple scheme for estimation of the temperature of the longitudinal vibrational modes of the ions. We use the ions interaction to effectively infer the temperature of the individual ions. The non-classicality of one of the ions vibrational modes, introduced due to a squeezed thermal reservoir, improves the indirect inference of the individual temperatures.
  arXiv  Detail & Related papers  (2021-09-10T17:37:24Z)
• 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)
• Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials [55.41644538483948]
  In conventional ion traps, the trapping potential is close to independent of the electronic state, providing confinement for ions dependent on their charge-to-mass ratio $Q/m$. Here we experimentally study optical dipole potentials for $138mathrmBa+$ ions stored within two distinctive traps operating at 532 nm and 1064 nm.
  arXiv  Detail & Related papers  (2020-10-26T14:36:48Z)
• Effect of phonons on the electron spin resonance absorption spectrum [62.997667081978825]
  We model the effect of phonons and temperature on the electron spin resonance (ESR) signal in magnetically active systems. We find that the suppression of ESR signals is due to phonon broadening but not based on the common assumption of orbital quenching.
  arXiv  Detail & Related papers  (2020-04-22T01:13:07Z)

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.