A microscopic model of electronic field noise heating in ion traps

Abstract

Motional heating of ions in micro-fabricated traps is a challenge hindering experimental realization of large-scale quantum processing devices. Recently a series of measurements of the heating rates in surface-electrode ion traps characterized their frequency, distance, and temperature dependencies, but our understanding of the microscopic origin of this noise is still vague. In this work we develop a theoretical model for the electric field noise which is associated with a random distribution of adsorbed atoms on the trap electrode surface. By using first principle calculations of the fluctuating dipole moments of the adsorbed atoms we evaluate the distance, frequency and temperature dependence of the resulting electric field fluctuation spectrum.Our theory calculates the noise spectrum beyond the standard scenario of two-level fluctuators, by incorporating all the relevant vibrational states. The $1/f$ noise is shown to commence at roughly the frequency of the fundamental phonon transition rate and the $d^{-4}$ dependence with distance of the ion from the electrode surface is established.

8 pages, 7 figures, updated to match PRA version

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• BASE - The Baryon Antibaryon Symmetry Experiment
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• Reduction of trapped ion anomalous heating by in situ surface plasma cleaning
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• Measurements of trapped-ion heating rates with exchangeable surfaces in close proximity
• Implications of surface noise for the motional coherence of trapped ions
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• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic
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• Spatially resolved surface dissipation over metal and dielectric substrates
• Technologies for trapped-ion quantum information systems
• Distance scaling and polarization of electric-field noise in a surface ion trap
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• Interplay between charge and spin noise in the near-surface theory of decoherence and relaxation of $C_{3v}$ symmetry qutrit spin-1 centers
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• A Quantum Spectrometer for Arbitrary Noise
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• First-principles computational methods for quantum defects in two-dimensional materials: A perspective
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• Simulation of the elementary evolution operator with the motional states of an ion in an anharmonic trap
• Mitigating noise of residual electric fields for single Rydberg atoms with electron photodesorption
• Nonclassical radiation from a nonlinear oscillator driven solely by classical $1/f$ noise
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• Convenient Real-Time Monitoring of the Contamination of Surface Ion Trap
• From Quantum Optics to Quantum Technologies
• Surface science motivated by heating of trapped ions from the quantum ground state