Rydberg ions in coherent motional states: A new method for determining the polarizability of Rydberg ions

• URL: http://arxiv.org/abs/2208.11117v1
• Date: Tue, 23 Aug 2022 17:56:50 GMT
• Title: Rydberg ions in coherent motional states: A new method for determining the polarizability of Rydberg ions
• Authors: Marie Niederl\"ander, Jonas Vogel, Alexander Schulze-Makuch, Bastien G\'ely, Arezoo Mokhberi and Ferdinand Schmidt-Kaler
• Abstract summary: We present a method for measuring the polarizability of Rydberg ions confined in a Paul trap. The method is easy-to-implement and applicable to different Rydberg states regardless of their principal or angular quantum numbers.
• Score: 71.05995184390709
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a method for measuring the polarizability of Rydberg ions confined in the harmonic potential of a Paul trap. For a highly excited electronic state, the coupling between the electronic wave function and the trapping field modifies the excitation probability depending on the motional state of the ion. This interaction strongly depends on the polarizability of the excited state and manifests itself in the state-dependent secular frequencies of the ion. We initialize a single trapped $^{40}$Ca$^+$ ion from the motional ground state into coherent states with $|\alpha|$ up to 12 using electric voltages on the trap segments. The internal state, firstly initialised in the long-lived 3D$_{5/2}$ state, is excited to a Rydberg S$_{1/2}$-state via the 5P$_{3/2}$ state in a two-photon process. We probe the depletion of the 3D$_{5/2}$ state owing to the Rydberg excitation followed by a decay into the internal ground 4S$_{1/2}$ state. By analysing the obtained spectra we extract the polarizability of Rydberg states which agree with numerical calculations. The method is easy-to-implement and applicable to different Rydberg states regardless of their principal or angular quantum numbers. An accurate value of the state polarizability is needed for quantum gate operations with Rydberg ion crystals.

Related papers

• Charged ultralong-range Rydberg trimers [0.0]
  Long-range ion-Rydberg molecules can be divided into two families of states, which are characterised by their unique electronic structures. We predict that in both cases these diatomic molecular states can bind additional ground state atoms lying within the orbit of the Rydberg electron. The predicted trimer binding energies and excitation series are distinct enough to be observed using current experimental techniques.
  arXiv  Detail & Related papers  (2022-11-24T14:48:27Z)
• Controlling Rydberg excitations using ion core transitions in alkaline earth atom tweezer arrays [0.6896268759002248]
  Local control over gate operations is an outstanding challenge in quantum computing with Rydberg atom arrays. One approach is to use a global field to excite atoms to the Rydberg state, and tune individual atoms in and out of resonance via local light shifts. We experimentally demonstrate global control of Rydberg excitations in a Yb optical tweezer array via light shifts induced by a laser tuned near the Yb$+$ $6srightarrow6p_1/2$ transition.
  arXiv  Detail & Related papers  (2021-10-13T17:32:47Z)
• Dimerization of many-body subradiant states in waveguide quantum electrodynamics [137.6408511310322]
  We study theoretically subradiant states in the array of atoms coupled to photons propagating in a one-dimensional waveguide. We introduce a generalized many-body entropy of entanglement based on exact numerical diagonalization. We reveal the breakdown of fermionized subradiant states with increase of $f$ with emergence of short-ranged dimerized antiferromagnetic correlations.
  arXiv  Detail & Related papers  (2021-06-17T12:17:04Z)
• 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)
• 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)
• Four-Dimensional Scaling of Dipole Polarizability in Quantum Systems [55.54838930242243]
  Polarizability is a key response property of physical and chemical systems. We show that polarizability follows a universal four-dimensional scaling law. This formula is also applicable to many-particle systems.
  arXiv  Detail & Related papers  (2020-10-22T15:42:36Z)
• Precision measurement of the ionization energy of a single trapped $^{40}$Ca$^+$ ion by Rydberg series excitation [25.488181126364186]
  We carried out Rydberg series spectroscopy for $nS_1/2$ states with $38 leq n leq 65$ and for $nD_5/2$ states with $37leq n leq 50$ on a single trapped $40$Ca$+$ ion. From a nonlinear regression to resonance, we determined the ionization energy of 2 870 575.582 GHz, measured 60 times more accurately as compared to the accepted value and contradicting it by 7.5 standard deviations.
  arXiv  Detail & Related papers  (2020-09-02T13:47:48Z)
• Rydberg spectrum of a single trapped Ca$^+$ ion: A Floquet analysis [0.0]
  We compute the Rydberg spectrum of a single Ca$+$ ion in a Paul trap by incorporating various internal and external coupling terms of the ion to the trap in the Hamiltonian. The electronic Rydberg states are precisely described by a one-electron model potential for e$-$+Ca$2+$.
  arXiv  Detail & Related papers  (2020-05-27T21:17:30Z)
• Magic trapping of a Rydberg ion with a diminished static polarizability [5.5922849070931795]
  We engineer a Rydberg state that is insensitive to electric fields by coupling two Rydberg states with static polarizabilities of opposite sign. We show that the magically-trapped ion can be coherently excited to the Rydberg state without the need for control of the ion's motion.
  arXiv  Detail & Related papers  (2020-05-25T21:57:31Z)
• Anisotropy-mediated reentrant localization [62.997667081978825]
  We consider a 2d dipolar system, $d=2$, with the generalized dipole-dipole interaction $sim r-a$, and the power $a$ controlled experimentally in trapped-ion or Rydberg-atom systems. We show that the spatially homogeneous tilt $beta$ of the dipoles giving rise to the anisotropic dipole exchange leads to the non-trivial reentrant localization beyond the locator expansion.
  arXiv  Detail & Related papers  (2020-01-31T19:00:01Z)

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.