Adiabatically controlled motional states of a ground-state cooled CaO$^{+}$ and Ca$^{+}$ trapped ion chain

• URL: http://arxiv.org/abs/2212.05105v1
• Date: Fri, 9 Dec 2022 20:07:01 GMT
• Title: Adiabatically controlled motional states of a ground-state cooled CaO$^{+}$ and Ca$^{+}$ trapped ion chain
• Authors: Lu Qi, Evan C. Reed and Kenneth R. Brown
• Abstract summary: 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.
• Score: 6.1524835590475
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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. Here, 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. We also show that the phonon state of the axial out-of-phase mode of the ion chain is maintained while the mode frequency is adiabatically ramped up and down. The adiabatic ramping of the motional mode frequency is a prerequisite for searching for the proposed molecular dipole-phonon interaction.

Related papers

• A Novel Quasiparticle Method for Solid State Ion Transport [1.4918456025103544]
  The quasiparticle method has achieved a great success in solid state electronics and crystal lattice vibration. A general recipe is put forward to map the classical solid state ion system together with the short-range ion-ion repulsion to a quasiparticle quantum system. The derived ionic eigen-states and transport can naturally incorporate the concerted behavior.
  arXiv  Detail & Related papers  (2023-10-22T20:34:13Z)
• Engineering steady entanglement for trapped ions at finite temperature by dissipation [0.0]
  We propose a dissipative method for preparation of a maximally entangled steady state of two trapped ions in the Lamb-Dicke limit. We obtain an effective coupling between two particles, which is independent of the phonon-number fluctuations. Our result shows that the CHSH inequality can be violated for a wide range of decoherence parameters, even at finite temperature.
  arXiv  Detail & Related papers  (2022-07-13T02:42:06Z)
• Dynamics of Transmon Ionization [94.70553167084388]
  We numerically explore the dynamics of a driven transmon-resonator system under strong and nearly resonant measurement drives. We find clear signatures of transmon ionization where the qubit escapes out of its cosine potential.
  arXiv  Detail & Related papers  (2022-03-21T18:00:15Z)
• Chiral-coupling-assisted refrigeration in trapped ions [5.273668342847468]
  We show the capability of light-mediated chiral couplings between ions, which enables a superior cooling scheme. Our results help surpass the bottleneck of cooling procedure in applications of trapped-ion-based quantum computer and simulator.
  arXiv  Detail & Related papers  (2022-03-02T05:18:11Z)
• Nearly-Resonant Crystalline-Phononic Coupling in Quantum Spin Liquid Candidate CsYbSe$_2$ [48.30279211143264]
  CsYbSe$$, a recently identified quantum spin liquid (QSL) candidate, exhibits strong crystal electric field excitations. We identify phonon and CEF modes with Raman spectroscopy and observe strong CEF-phonon mixing resulting in a vibronic bound state.
  arXiv  Detail & Related papers  (2021-11-06T17:00:34Z)
• Evaluating states in trapped ions with local correlation between internal and motional degrees of freedom [0.0]
  We propose and demonstrate a scalable scheme for the simultaneous determination of internal and motional states in trapped ions with single-site resolution. The scheme is applied to the study of polaritonic excitations in the Jaynes- Cummings Hubbard model with trapped ions.
  arXiv  Detail & Related papers  (2021-05-11T03:48:35Z)
• 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)
• Ancilla mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals [68.8204255655161]
  We show how a Bayesian analysis exhausts the information about the state of the qubit from the optical signal of the ancilla ion. We extend the architecture to ions residing in two remote cavities, and we show how continuous monitoring of fluorescence signals from the two ancilla ions leads to entanglement of the qubit ions.
  arXiv  Detail & Related papers  (2020-07-06T16:31:46Z)

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.