Rydberg quantum computation with nuclear spins in two-electron neutral atoms

• URL: http://arxiv.org/abs/2103.13847v1
• Date: Thu, 25 Mar 2021 13:55:04 GMT
• Title: Rydberg quantum computation with nuclear spins in two-electron neutral atoms
• Authors: Xiao-Feng Shi
• Abstract summary: Alkaline-earth-like(AEL) atoms with two valence electrons and a nonzero nuclear spin can be excited to Rydberg state for quantum computing. We provide two solutions to this outstanding challenge with realistic data of well-studied AEL isotopes.
• Score: 4.394728504061752
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Alkaline-earth-like~(AEL) atoms with two valence electrons and a nonzero nuclear spin can be excited to Rydberg state for quantum computing. Typical AEL ground states possess no hyperfine splitting, but unfortunately a GHz-scale splitting seems necessary for Rydberg excitation. Though strong magnetic fields can induce a GHz-scale splitting, weak fields are desirable to avoid noise in experiments. Here, we provide two solutions to this outstanding challenge with realistic data of well-studied AEL isotopes. In the first theory, the two nuclear spin qubit states $|0\rangle$ and $|1\rangle$ are excited to Rydberg states $|r\rangle$ with detuning $\Delta$ and 0, respectively, where a MHz-scale detuning $\Delta$ arises from a weak magnetic field on the order of 1~G. With a proper ratio between $\Delta$ and $\Omega$, the qubit state $|1\rangle$ can be fully excited to the Rydberg state while $|0\rangle$ remains there. In the second theory, we show that by choosing appropriate intermediate states a two-photon Rydberg excitation can proceed with only one nuclear spin qubit state. The second theory is applicable whatever the magnitude of the magnetic field is. These theories bring a versatile means for quantum computation by combining the broad applicability of Rydberg blockade and the incomparable advantages of nuclear-spin quantum memory in two-electron neutral atoms.

Related papers

• Generation of complete graph states in a spin-$1/2$ Heisenberg chain with a globally optimized magnetic field [0.0]
  We introduce a method for generating multiparticle complete graph states using a spin$1/2$ Heisenberg $XX$ chain subjected to a time-varying magnetic field. Our scheme relies exclusively on nearest-neighbor interactions between atoms, with real-time magnetic field formation facilitated by quantum optimal control theory.
  arXiv  Detail & Related papers  (2024-01-03T21:32:35Z)
• Fast nuclear-spin entangling gates compatible with large-scale atomic arrays [15.929891047245482]
  Nuclear-spin entangling gates with divalent atoms can be executed by one global laser pulse. Nuclear-spin entangling gates with divalent atoms can be executed by one global laser pulse.
  arXiv  Detail & Related papers  (2023-12-11T12:21:08Z)
• Coherent dynamics in a five-level atomic system [62.997667081978825]
  coherent control of multi-partite quantum systems is one of the central prerequisites in quantum information processing. Laser-cooled neon atoms in the metastable state of state $1s2 2s2 2p5 3s$ are prepared. Coherence properties of the prepared states are studied using Ramsey and spin echo measurements.
  arXiv  Detail & Related papers  (2022-10-21T11:44:15Z)
• Rydberg ions in coherent motional states: A new method for determining the polarizability of Rydberg ions [71.05995184390709]
  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.
  arXiv  Detail & Related papers  (2022-08-23T17:56:50Z)
• Analyzing the Rydberg-based omg architecture for $^{171}$Yb nuclear spins [0.0]
  Neutral alkaline earth(-like) atoms have been employed in atomic arrays with individual readout, control, and high-fidelity Rydberg-mediated entanglement. We study the multilevel dynamics of the nuclear spin states when driving the clock or Rydberg transition with Rabi frequency.
  arXiv  Detail & Related papers  (2022-01-11T17:20:13Z)
• Laser-assisted binding of ultracold polar molecules with Rydberg atoms in the van der Waals regime [0.0]
  We study ultracold long-range collisions of alkali-metal dimers with a reservoir gas of alkalimetal Rydberg atoms in a two-photon laser excitation scheme. We show that the two-photon photoassociation (PA) of the atom-molecule pair into a long-range bound trimer state is efficient over a broad range of atomic Rydberg channels.
  arXiv  Detail & Related papers  (2021-09-14T02:56:57Z)
• Nuclei with up to $\boldsymbol{A=6}$ nucleons with artificial neural network wave functions [52.77024349608834]
  We use artificial neural networks to compactly represent the wave functions of nuclei. We benchmark their binding energies, point-nucleon densities, and radii with the highly accurate hyperspherical harmonics method.
  arXiv  Detail & Related papers  (2021-08-15T23:02:39Z)
• Partitioning dysprosium's electronic spin to reveal entanglement in non-classical states [55.41644538483948]
  We report on an experimental study of entanglement in dysprosium's electronic spin. Our findings open up the possibility to engineer novel types of entangled atomic ensembles.
  arXiv  Detail & Related papers  (2021-04-29T15:02:22Z)
• Single-site Rydberg addressing in 3D atomic arrays for quantum computing with neutral atoms [4.394728504061752]
  We show how to selectively excite one qubit deep in a 3D atomic array to Rydberg states. This makes it possible to design large-scale neutral-atom information processor based on Rydberg blockade.
  arXiv  Detail & Related papers  (2021-01-31T00:09:47Z)
• Electrically tuned hyperfine spectrum in neutral Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ single-molecule magnet [64.10537606150362]
  Both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with dopants, an electric field was shown to effectively change the spacing between the nuclear spin qubit levels. This hyperfine Stark effect may be useful for applications of molecular nuclear spins for quantum computing.
  arXiv  Detail & Related papers  (2020-07-31T01:48:57Z)
• Hyperfine and quadrupole interactions for Dy isotopes in DyPc$_2$ molecules [77.57930329012771]
  Nuclear spin levels play an important role in understanding magnetization dynamics and implementation and control of quantum bits in lanthanide-based single-molecule magnets. We investigate the hyperfine and nuclear quadrupole interactions for $161$Dy and $163$Dy nucleus in anionic DyPc$.
  arXiv  Detail & Related papers  (2020-02-12T18:25:31Z)

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.