Journal
JOURNAL OF MATHEMATICAL PHYSICS
Volume 55, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4903507
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Funding
- IARPA MQCO program [W911NF-10-1-0324]
- NSERC
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We give an algorithm which produces a unique element of the Clifford group on n qubits (C-n) from an integer 0 <= i < |C-n| (the number of elements in the group). The algorithm involves O(n(3)) operations and provides, in addition to a canonical mapping from the integers to group elements g, a factorization of g into a sequence of at most 4n symplectic transvections. The algorithm can be used to efficiently select random elements of C-n which are often useful in quantum information theory and quantum computation. We also give an algorithm for the inverse map, indexing a group element in time O(n(3)). (C) 2014 AIP Publishing LLC.
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