Coherence of qubits based on single Ca$^+$ ions

F. Schmidt-Kaler; S. Gulde; M. Riebe; T. Deuschle; A. Kreuter; G. Lancaster; C. Becher; J. Eschner; H. Haeffner; R. Blatt

doi:10.1088/0953-4075/36/3/319

Coherence of qubits based on single Ca$^+$ ions

Quantum Physics 2009-11-07 v1

Authors: F. Schmidt-Kaler , S. Gulde , M. Riebe , T. Deuschle , A. Kreuter , G. Lancaster , C. Becher , J. Eschner , H. Haeffner , R. Blatt

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Abstract

Two-level ionic systems, where quantum information is encoded in long lived states (qubits), are discussed extensively for quantum information processing. We present a collection of measurements which characterize the stability of a qubit based on the $S_{1/2}$ -- $D_{5/2}$ transition of single $^{40}$ Ca $^+$ ions in a linear Paul trap. We find coherence times of $\simeq$ 1 ms, discuss the main technical limitations and outline possible improvements.

Keywords

trapped ion quantum computing quantum decoherence in superconducting qubits superconducting qubits

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@article{arxiv.quant-ph/0211059,
  title  = {Coherence of qubits based on single Ca$^+$ ions},
  author = {F. Schmidt-Kaler and S. Gulde and M. Riebe and T. Deuschle and A. Kreuter and G. Lancaster and C. Becher and J. Eschner and H. Haeffner and R. Blatt},
  journal= {arXiv preprint arXiv:quant-ph/0211059},
  year   = {2009}
}

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Proceedings of "Trapped charged particles and fundamental interactions" submitted to Journal of Physics B (IoP)

Coherence of qubits based on single Ca$^+$ ions

Abstract

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