Comparison of Gaussian and super Gaussian laser beams for addressing atomic qubits
| Autor: | Michal Piotrowicz, Glen D. Gillen, Katharina Gillen-Christandl, Mark Saffman |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Rabi cycle
Physics and Astronomy (miscellaneous) Atomic Physics (physics.atom-ph) Gaussian General Physics and Astronomy FOS: Physical sciences 01 natural sciences Physics - Atomic Physics law.invention 010309 optics symbols.namesake Quantum gate law 0103 physical sciences Physics::Atomic Physics 010306 general physics Quantum optics Physics Quantum Physics General Engineering Laser Computational physics Qubit symbols Quantum Physics (quant-ph) Beam (structure) Gaussian beam |
| DOI: | 10.48550/arxiv.1510.07708 |
| Popis: | We study the fidelity of single qubit quantum gates performed with two-frequency laser fields that have a Gaussian or super Gaussian spatial mode. Numerical simulations are used to account for imperfections arising from atomic motion in an optical trap, spatially varying Stark shifts of the trapping and control beams, and transverse and axial misalignment of the control beams. Numerical results that account for the three dimensional distribution of control light show that a super Gaussian mode with intensity $I\sim e^{-2(r/w_0)^n}$ provides reduced sensitivity to atomic motion and beam misalignment. Choosing a super Gaussian with $n=6$ the decay time of finite temperature Rabi oscillations can be increased by a factor of 60 compared to an $n=2$ Gaussian beam, while reducing crosstalk to neighboring qubit sites. Comment: 11 figures, added material on sensitivity to super Gaussian order |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|