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Title: 1 / ω electric-field noise in surface ion traps from correlated adsorbate dynamics

Abstract

Ion traps are promising architectures for implementing quantum computers, but they suffer from excessive “anomalous” ion motional heating that limit their overall coherence and practicality for scalable quantum computing. The exact microscopic origins of anomalous heating remain an open question, but experiments point to adsorbates on trap electrodes as one likely source. Many different models of anomalous heating have been proposed, but these models have yet to pinpoint the atomistic origin of the experimentally observed 1/ω electric-field noise scaling seen in ion traps at frequencies between 0.1–10 MHz. In this work, we show that a model based on previously proposed surface-induced dipole fluctuations on adsorbates, but which also incorporates interparticle interaction dynamics through molecular dynamics simulations of up to multiple monolayers of adsorbates, gives rise to 1/ω frequency scaling at the MHz frequencies typically employed in ion traps. Overall, these results demonstrate that moderate-to-high densities of adsorbates can give rise to a set of activated motions that produce the 1/ω noise observed in ion traps and that collective adsorbate motions produce the observed noise spectra that a noninteracting model does not capture.

Authors:
ORCiD logo [1];  [2];  [2];  [3]; ORCiD logo [1]; ORCiD logo [2]
  1. Brown Univ., Providence, RI (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Ultracold Atoms, Research Lab. of Electronics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1861247
Alternate Identifier(s):
OSTI ID: 1841044
Report Number(s):
LLNL-JRNL-821481
Journal ID: ISSN 2469-9926; 1033232; TRN: US2305466
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 105; Journal Issue: 1; Journal ID: ISSN 2469-9926
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 74 ATOMIC AND MOLECULAR PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; adsorption; cooling & trapping; diffusion; optical lattices & traps; quantum computation

Citation Formats

Foulon, Benjamin L., Ray, Keith G., Kim, Chang-Eun, Liu, Yuan, Rubenstein, Brenda M., and Lordi, Vincenzo. 1/ω electric-field noise in surface ion traps from correlated adsorbate dynamics. United States: N. p., 2022. Web. doi:10.1103/physreva.105.013107.
Foulon, Benjamin L., Ray, Keith G., Kim, Chang-Eun, Liu, Yuan, Rubenstein, Brenda M., & Lordi, Vincenzo. 1/ω electric-field noise in surface ion traps from correlated adsorbate dynamics. United States. https://doi.org/10.1103/physreva.105.013107
Foulon, Benjamin L., Ray, Keith G., Kim, Chang-Eun, Liu, Yuan, Rubenstein, Brenda M., and Lordi, Vincenzo. Wed . "1/ω electric-field noise in surface ion traps from correlated adsorbate dynamics". United States. https://doi.org/10.1103/physreva.105.013107. https://www.osti.gov/servlets/purl/1861247.
@article{osti_1861247,
title = {1/ω electric-field noise in surface ion traps from correlated adsorbate dynamics},
author = {Foulon, Benjamin L. and Ray, Keith G. and Kim, Chang-Eun and Liu, Yuan and Rubenstein, Brenda M. and Lordi, Vincenzo},
abstractNote = {Ion traps are promising architectures for implementing quantum computers, but they suffer from excessive “anomalous” ion motional heating that limit their overall coherence and practicality for scalable quantum computing. The exact microscopic origins of anomalous heating remain an open question, but experiments point to adsorbates on trap electrodes as one likely source. Many different models of anomalous heating have been proposed, but these models have yet to pinpoint the atomistic origin of the experimentally observed 1/ω electric-field noise scaling seen in ion traps at frequencies between 0.1–10 MHz. In this work, we show that a model based on previously proposed surface-induced dipole fluctuations on adsorbates, but which also incorporates interparticle interaction dynamics through molecular dynamics simulations of up to multiple monolayers of adsorbates, gives rise to 1/ω frequency scaling at the MHz frequencies typically employed in ion traps. Overall, these results demonstrate that moderate-to-high densities of adsorbates can give rise to a set of activated motions that produce the 1/ω noise observed in ion traps and that collective adsorbate motions produce the observed noise spectra that a noninteracting model does not capture.},
doi = {10.1103/physreva.105.013107},
journal = {Physical Review A},
number = 1,
volume = 105,
place = {United States},
year = {Wed Jan 19 00:00:00 EST 2022},
month = {Wed Jan 19 00:00:00 EST 2022}
}

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