Validating a lutetium frequency reference

• URL: http://arxiv.org/abs/2404.16414v1
• Date: Thu, 25 Apr 2024 08:46:08 GMT
• Title: Validating a lutetium frequency reference
• Authors: Kyle J. Arnold, Scott Bustabad, Qin Qichen, Zhao Zhang, Qi Zhao, Murray D. Barrett,
• Abstract summary: We review our progress in developing a frequency reference with singly ionized lutetium. We give estimates of the levels of inaccuracy we expect to achieve in the near future.
• Score: 11.809955437401234
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We review our progress in developing a frequency reference with singly ionized lutetium and give estimates of the levels of inaccuracy we expect to achieve in the near future with both the $^1S_0\leftrightarrow{}^3D_1$ and $^1S_0\leftrightarrow{}^3D_2$ transitions. Based on established experimental results, we show that inaccuracies at the low $10^{-19}$ level are readily achievable for the $^1S_0\leftrightarrow{}^3D_1$ transition, and the frequency ratio between the two transitions is limited almost entirely by the BBR shift. We argue that the frequency ratio measured within the one apparatus provides a well-defined metric to compare and establish the performance of remotely located systems. For the measurement of an in situ frequency ratio, relativistic shifts drop out and both transitions experience the same electromagnetic environment. Consequently, the uncertainty budget for the ratio is practically identical to the uncertainty budgets for the individual transitions. If the ratios for two or more systems disagree we can be certain at least one of the clock assessments is incorrect. If they agree, subsequent comparisons on one transition would only differ by relativistic effects. Since motional effects are easily assessed and typically small for a heavy ion, only the differential gravitational red-shift will significantly contribute and this can be confirmed by comparison on the second transition.

Related papers

• Charge sensitivity in the transmon regime [0.1794906241363549]
  We show that transmons can be limited by charge-noise, even with $E_textJ/E_textC approx 50$.<n>Our results show that transmons can be limited by charge-noise, even with $E_textJ/E_textC approx 50$.
  arXiv  Detail & Related papers  (2025-08-05T23:33:57Z)
• Emergence of Fermi's Golden Rule in the Probing of a Quantum Many-Body System [35.40737096974622]
  We observe the emergence and breakdown of Fermi's Golden Rule (FGR) in a quantum many-body system.<n>Our results provide a blueprint for the applicability of linear response theory to the spectroscopy of quantum many-body systems.
  arXiv  Detail & Related papers  (2025-02-20T18:59:57Z)
• Long distance spin shuttling enabled by few-parameter velocity optimization [37.69303106863453]
  Spin qubit shuttling via moving conveyor-mode quantum dots in Si/SiGe offers a promising route to scalable miniaturized quantum computing. Recent modeling of dephasing via valley degrees of freedom and well disorder dictate a slow shutting speed which seems to limit errors to above correction thresholds if not mitigated. We show that typical errors for 10 $mu$m shuttling at constant speed results in O(1) error, using fast, automatically differentiable numerics and including improved disorder modeling and potential noise ranges.
  arXiv  Detail & Related papers  (2024-09-11T20:21:45Z)
• Dissipative phase transition: from qubits to qudits [0.0]
  We investigate the fate of dissipative phase transitions in quantum many-body systems when the individual constituents are qudits instead of qubits. Considering qudits instead of qubits opens new perspectives on accessing rich phase diagrams in open many-body systems.
  arXiv  Detail & Related papers  (2024-05-02T12:08:28Z)
• Test of transient deviations from Quantum Mechanics in Bell's experiment [41.94295877935867]
  The conflict between Quantum Mechanics (QM) and Local Realism is most noticeable in the correlations observed between distant regions of a spatially spread entangled state. It has been hypothesized that transient deviations (from the values predicted by QM) may be observed if the correlations are measured in a time shorter than L/c. We present the results of such a test performed on a specially designed optical Bell setup with a distance between stations up to 24 m in straight line.
  arXiv  Detail & Related papers  (2024-04-15T13:01:30Z)
• Prospects for the determination of fundamental constants with beyond-state-of-the-art uncertainty using molecular hydrogen ion spectroscopy [0.0]
  We analyze how the accuracy of mass ratios may be improved by providing experimental transition frequencies between levels with larger quantum numbers. For the Rydberg constant and the charge radii, improvements by factors of 4 to 11 are projected.
  arXiv  Detail & Related papers  (2024-03-20T22:43:29Z)
• Coherent collisional decoherence [0.0]
  We study the decoherence of a system of $N$ non-interacting heavy particles (atoms) due to coherent scattering with a background gas. We introduce a framework for computing the induced phase shift and loss of contrast for arbitrary preparations of $N$-particle quantum states. We find phase shifts that are inherently $(Ngeq 2)$-body effects and may be searched for in future experiments.
  arXiv  Detail & Related papers  (2024-02-05T19:00:00Z)
• Clustered Switchback Experiments: Near-Optimal Rates Under Spatiotemporal Interference [44.644520116360106]
  We estimate the global average treatment effect (GATE), the difference between average outcomes having exposed all units at all times to treatment or to control. We propose a clustered switchback design, where units are grouped into clusters and time steps are grouped into blocks. We show that for graphs that admit good clustering, a truncated exposure-mapping Horvitz-Thompson estimator achieves $tilde O(1/NT)$ mean-squared error (MSE), matching an $Omega (1/NT)$ lower bound up to logarithmic terms.
  arXiv  Detail & Related papers  (2023-12-25T01:00:58Z)
• Continuous dynamical decoupling of optical $^{171}$Yb$^{+}$ qudits with radiofrequency fields [45.04975285107723]
  We experimentally achieve a gain in the efficiency of realizing quantum algorithms with qudits. Our results are a step towards the realization of qudit-based algorithms using trapped ions.
  arXiv  Detail & Related papers  (2023-05-10T11:52:12Z)
• Two-level approximation of transmons in quantum quench experiments [9.814009915583153]
  We numerically investigate the accuracy and validity of the two-level approximation for the multilevel transmons based on the concept of Loschmidt echo. We present the results for different system Hamiltonians with various initial states, qubit coupling strength, and external driving, and for two kinds of quantum quench experiments with time reversal and time evolution in one direction.
  arXiv  Detail & Related papers  (2023-02-10T10:53:02Z)
• Robust Two-Qubit Gates Using Pulsed Dynamical Decoupling [1.0539847330971805]
  We present the experimental implementation of a two-qubit phase gate, using a radio frequency (RF) controlled trapped-ion quantum processor. It allows for a tunable phase shift with high-fidelity results, in particular a fringe contrast up to $99_-2+1%$ is observed in Ramsey-type measurements. It holds the potential for fast gate speeds (gate times on the order of $100mu$s) by using two axial motional modes of a two-ion crystal.
  arXiv  Detail & Related papers  (2022-07-30T10:59:31Z)
• Stabilizing and improving qubit coherence by engineering noise spectrum of two-level systems [52.77024349608834]
  Superconducting circuits are a leading platform for quantum computing. Charge fluctuators inside amorphous oxide layers contribute to both low-frequency $1/f$ charge noise and high-frequency dielectric loss. We propose to mitigate those harmful effects by engineering the relevant TLS noise spectral densities.
  arXiv  Detail & Related papers  (2022-06-21T18:37:38Z)
• Superdiffusion in random two dimensional system with time-reversal symmetry and long-range hopping [45.873301228345696]
  localization problem in the crossover regime for the dimension $d=2$ and hopping $V(r) propto r-2$ is not resolved yet. We show that for the hopping determined by two-dimensional anisotropic dipole-dipole interactions there exist two distinguishable phases at weak and strong disorder.
  arXiv  Detail & Related papers  (2022-05-29T16:53:20Z)
• Analytic Signal Phase in $N-D$ by Linear Symmetry Tensor--fingerprint modeling [69.35569554213679]
  We show that the Analytic Signal phase, and its gradient have a hitherto unstudied discontinuity in $2-D $ and higher dimensions. This shortcoming can result in severe artifacts whereas the problem does not exist in $1-D $ signals. We suggest the use of Linear Symmetry phase, relying on more than one set of Gabor filters, but with a negligible computational add-on.
  arXiv  Detail & Related papers  (2020-05-16T21:17:26Z)

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.