Errors in stimulated-Raman-induced logic gates in $^{133}$Ba$^+$
- URL: http://arxiv.org/abs/2212.02608v1
- Date: Mon, 5 Dec 2022 21:44:30 GMT
- Title: Errors in stimulated-Raman-induced logic gates in $^{133}$Ba$^+$
- Authors: Matthew J. Boguslawski and Zachary J. Wall and Samuel R. Vizvary and
Isam Daniel Moore and Michael Bareian and David T. C. Allcock and David J.
Wineland and Eric R. Hudson and Wesley C. Campbell
- Abstract summary: 133mathrmBa+$ is illuminated by a laser that is far-detuned from optical transitions, and the resulting spontaneous Raman scattering rate is measured.
The observed scattering rate is lower than previous theoretical estimates.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: ${}^{133}\mathrm{Ba}^+$ is illuminated by a laser that is far-detuned from
optical transitions, and the resulting spontaneous Raman scattering rate is
measured. The observed scattering rate is lower than previous theoretical
estimates. The majority of the discrepancy is explained by a more accurate
treatment of the scattered photon density of states. This work establishes
that, contrary to previous models, there is no fundamental limit to
laser-driven quantum gates from laser-induced spontaneous Raman scattering.
Related papers
- Spontaneous Raman scattering from metastable states of Ba$^+$ [0.0]
Quantum logic gates performed via two-photon stimulated-Raman transitions in ions and atoms are fundamentally limited by spontaneous scattering errors.<n>Recent theoretical treatment of these scattering processes has predicted no lower bound on the error rate of such gates when implemented with far-detuned lasers.
arXiv Detail & Related papers (2025-05-28T15:19:21Z) - Spontaneous Raman scattering out of a metastable atomic qubit [0.0]
We measure spontaneous Raman scattering rates out of a metastable $D_5/2$ qubit manifold of a single trapped $40$Ca$+$ ion illuminated by 976 nm light.<n>This supports the calculation of error rates from both types of scattering during one- and two-qubit gates.
arXiv Detail & Related papers (2025-05-07T23:32:33Z) - Measuring the Evolution of Entanglement in Compton Scattering [101.11630543545151]
The behavior of quantum entanglement during scattering is identical to the behavior of initially classically correlated photons up to a constant factor equal to two.
Our dedicated experiment with photons confirms these results and explains the "Puzzle of Decoherence" observed recently.
arXiv Detail & Related papers (2024-06-20T14:21:23Z) - First Detailed Study of the Quantum Decoherence of Entangled Gamma Photons [0.0]
We present the first statistically and kinematically precise experimental data for triple Compton scattering of such entangled $gamma$.
The measured $R$, deconvolved from multiple scattering backgrounds, are found to exceed the classical limit for intermediate scatter angles up to $sim$60$circ$ and diminish at larger angles.
The results are crucial to future study and utilisation of entangled mega-electron-volt $gamma$ in fundamental physics and PET imaging.
arXiv Detail & Related papers (2023-12-08T13:56:56Z) - Photon scattering errors during stimulated Raman transitions in
trapped-ion qubits [0.0]
We study photon scattering errors in stimulated Raman driven quantum logic gates.
Previous models significantly overestimate the gate error rate due to photon scattering.
gate errors below $10-4$ are achievable for all commonly-used trapped ions.
arXiv Detail & Related papers (2022-11-01T20:56:22Z) - Entanglement of annihilation photons [141.5628276096321]
We present the results of a new experimental study of the quantum entanglement of photon pairs produced in positron-electron annihilation at rest.
Despite numerous measurements, there is still no experimental proof of the entanglement of photons.
arXiv Detail & Related papers (2022-10-14T08:21:55Z) - Phase Randomness in a Semiconductor Laser: the Issue of Quantum Random
Number Generation [83.48996461770017]
This paper describes theoretical and experimental methods for estimating the degree of phase randomization in a gain-switched laser.
We show that the interference signal remains quantum in nature even in the presence of classical phase drift in the interferometer.
arXiv Detail & Related papers (2022-09-20T14:07:39Z) - Quantum density matrix theory for a laser without adiabatic elimination
of the population inversion: transition to lasing in the class-B limit [62.997667081978825]
No class-B quantum density-matrix model is available to date, capable of accurately describing coherence and photon correlations within a unified theory.
Here we carry out a density-matrix theoretical approach for generic class-B lasers, and provide closed equations for the photonic and atomic reduced density matrix in the Fock basis of photons.
This model enables the study of few-photon bifurcations and non-classical photon correlations in class-B laser devices, also leveraging quantum descriptions of coherently coupled nanolaser arrays.
arXiv Detail & Related papers (2022-05-26T16:33:51Z) - Perturbation approach in Heisenberg equations for lasers [77.34726150561087]
It is found that fluctuations of population significantly affect spontaneous and stimulated emissions into the lasing mode.
The method can be applied to various resonant systems in quantum optics.
arXiv Detail & Related papers (2022-01-08T18:24:37Z) - High-Fidelity Bell-State Preparation with $^{40}$Ca$^+$ Optical Qubits [0.0]
Entanglement generation in trapped-ion systems has relied thus far on two distinct but related geometric phase gate techniques.
We report an experimental demonstration of this entangling gate using a pair of $40$Ca$+$ ions in a cryogenic surface-electrode ion trap and a commercial, high-power, 532 nm Nd:YAG laser.
arXiv Detail & Related papers (2021-05-12T17:39:21Z) - Symmetry allows for distinguishability in totally destructive
many-particle interference [52.77024349608834]
We investigate, in a four photon interference experiment in a laser-written waveguide structure, how symmetries control the suppression of many-body output events of a $J_x$ unitary.
We show that totally destructive interference does not require mutual indistinguishability between all, but only between symmetrically paired particles.
arXiv Detail & Related papers (2021-02-19T16:37:19Z) - Critical Theory for the Breakdown of Photon Blockade [0.0]
Photon blockade is the result of the interplay between the quantized nature of light and strong optical nonlinearities.
We theoretically study a single atom coupled to the light field.
We show that this transition is associated to the spontaneous breaking of an anti-unitary PT-symmetry.
arXiv Detail & Related papers (2020-06-10T01:09:21Z)
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.