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High-fidelity readout scheme for rare-earth solid-state quantum computing

Walther, Andreas LU ; Rippe, Lars LU ; Yan, Ying LU ; Karlsson, Jenny LU ; Serrano, Diana LU ; Nilsson, Adam LU ; Bengtsson, Samuel LU and Kröll, Stefan LU (2015) In Physical Review A (Atomic, Molecular and Optical Physics) 92(2).
Abstract
We propose and analyze a high-fidelity readout scheme for a single-instance approach to quantum computing in rare-earth-ion-doped crystals. The scheme is based on using different elements as qubit and readout ions, where the readout ions are doped into the material at a much lower concentration than the qubit ions. It is shown that by allowing the qubit ion sitting closest to a readout ion to act as a readout buffer, the readout error can be reduced by more than an order of magnitude. The scheme is shown to be robust against certain experimental variations, such as varying detection efficiencies, and we use the scheme to predict the attainable quantum fidelity of a controlled NOT (CNOT) gate in these solid-state systems. In addition, we... (More)
We propose and analyze a high-fidelity readout scheme for a single-instance approach to quantum computing in rare-earth-ion-doped crystals. The scheme is based on using different elements as qubit and readout ions, where the readout ions are doped into the material at a much lower concentration than the qubit ions. It is shown that by allowing the qubit ion sitting closest to a readout ion to act as a readout buffer, the readout error can be reduced by more than an order of magnitude. The scheme is shown to be robust against certain experimental variations, such as varying detection efficiencies, and we use the scheme to predict the attainable quantum fidelity of a controlled NOT (CNOT) gate in these solid-state systems. In addition, we discuss the potential scalability of the protocol to larger qubit systems. The results are based on parameters which we believe are experimentally feasible with current technology and which can be simultaneously realized. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
92
issue
2
article number
022319
publisher
American Physical Society
external identifiers
  • wos:000359342900004
  • scopus:84939458368
ISSN
1050-2947
DOI
10.1103/PhysRevA.92.022319
language
English
LU publication?
yes
id
0353f5e4-64fa-46a1-b0be-a369da916421 (old id 7975462)
date added to LUP
2016-04-01 10:09:32
date last changed
2020-12-22 02:08:17
@article{0353f5e4-64fa-46a1-b0be-a369da916421,
  abstract     = {We propose and analyze a high-fidelity readout scheme for a single-instance approach to quantum computing in rare-earth-ion-doped crystals. The scheme is based on using different elements as qubit and readout ions, where the readout ions are doped into the material at a much lower concentration than the qubit ions. It is shown that by allowing the qubit ion sitting closest to a readout ion to act as a readout buffer, the readout error can be reduced by more than an order of magnitude. The scheme is shown to be robust against certain experimental variations, such as varying detection efficiencies, and we use the scheme to predict the attainable quantum fidelity of a controlled NOT (CNOT) gate in these solid-state systems. In addition, we discuss the potential scalability of the protocol to larger qubit systems. The results are based on parameters which we believe are experimentally feasible with current technology and which can be simultaneously realized.},
  author       = {Walther, Andreas and Rippe, Lars and Yan, Ying and Karlsson, Jenny and Serrano, Diana and Nilsson, Adam and Bengtsson, Samuel and Kröll, Stefan},
  issn         = {1050-2947},
  language     = {eng},
  number       = {2},
  publisher    = {American Physical Society},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {High-fidelity readout scheme for rare-earth solid-state quantum computing},
  url          = {http://dx.doi.org/10.1103/PhysRevA.92.022319},
  doi          = {10.1103/PhysRevA.92.022319},
  volume       = {92},
  year         = {2015},
}