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Experimental quantum-state tomography of a solid-state qubit

Rippe, Lars LU ; Julsgaard, Brian LU ; Walther, Andreas LU ; Yan, Ying LU and Kröll, Stefan LU (2008) In Physical Review A (Atomic, Molecular and Optical Physics) 77(2). p.5-022307
Abstract
Quantum-state tomography is used to characterize the state of an ensemble based qubit implemented through two hyperfine levels in Pr3+ ions, doped into a Y2SiO5 crystal. We experimentally verify that single-qubit rotation errors due to inhomogeneities of the ensemble can be suppressed using the Roos-Molmer dark-state scheme [Roos and Molmer, Phys. Rev. A 69, 022321 (2004)] Fidelities above > 90%, presumably limited by excited state decoherence, were achieved. Although not explicitly taken care of in the Roos-Molmer scheme, it appears that also decoherence due to inhomogeneous broadening on the hyperfine transition is largely suppressed.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
77
issue
2
pages
5 - 022307
publisher
American Physical Society (APS)
external identifiers
  • wos:000253763900034
  • scopus:38949194143
ISSN
1050-2947
DOI
10.1103/PhysRevA.77.022307
language
English
LU publication?
yes
id
34c6943b-67ef-4f8a-b163-fd8fc7fa37d7 (old id 1185904)
date added to LUP
2008-09-03 11:16:48
date last changed
2017-07-30 03:52:16
@article{34c6943b-67ef-4f8a-b163-fd8fc7fa37d7,
  abstract     = {Quantum-state tomography is used to characterize the state of an ensemble based qubit implemented through two hyperfine levels in Pr3+ ions, doped into a Y2SiO5 crystal. We experimentally verify that single-qubit rotation errors due to inhomogeneities of the ensemble can be suppressed using the Roos-Molmer dark-state scheme [Roos and Molmer, Phys. Rev. A 69, 022321 (2004)] Fidelities above > 90%, presumably limited by excited state decoherence, were achieved. Although not explicitly taken care of in the Roos-Molmer scheme, it appears that also decoherence due to inhomogeneous broadening on the hyperfine transition is largely suppressed.},
  author       = {Rippe, Lars and Julsgaard, Brian and Walther, Andreas and Yan, Ying and Kröll, Stefan},
  issn         = {1050-2947},
  language     = {eng},
  number       = {2},
  pages        = {5--022307},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Experimental quantum-state tomography of a solid-state qubit},
  url          = {http://dx.doi.org/10.1103/PhysRevA.77.022307},
  volume       = {77},
  year         = {2008},
}