research article
Efficient Quantum Algorithms for GHZ and W States, and Implementation on the IBM Quantum Computer
June 1, 2019
Efficient deterministic algorithms are proposed with logarithmic step complexities for the generation of entangled GHZ(N) and W-N states useful for quantum networks, and an implementation on the IBM quantum computer up to N = 16 is demonstrated. Improved quality is then investigated using full quantum tomography for low-N GHZ and W states. This is completed by parity oscillations and histogram distance for large-N GHZ and W states, respectively. Robust states are built with about twice the number of quantum bits which were previously achieved.
Type
research article
Web of Science ID
WOS:000548077500008
Author(s)
Cruz, Diogo
Fournier, Romain
Gremion, Fabien
Komagata, Kenichi
Tosic, Tara
Thiesbrummel, Jarla
Date Issued
2019-06-01
Publisher
Published in
Volume
2
Issue
5-6
Article Number
1900015
Editorial or Peer reviewed
REVIEWED
Written at
EPFL
Available on Infoscience
July 29, 2020
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