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Mutually unbiased product bases for multiple qudits

Journal Article · · Journal of Mathematical Physics
DOI:https://doi.org/10.1063/1.4943301· OSTI ID:22597047
 [1];  [2];  [3]
  1. Department of Optics, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic and Department of Applied Mathematics, Hanyang University (ERICA), 55 Hanyangdaehak-ro, Ansan, Gyeonggi-do 426-791 (Korea, Republic of)
  2. Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna (Austria)
  3. Department of Mathematics, University of York, York YO10 5DD (United Kingdom)
We investigate the interplay between mutual unbiasedness and product bases for multiple qudits of possibly different dimensions. A product state of such a system is shown to be mutually unbiased to a product basis only if each of its factors is mutually unbiased to all the states which occur in the corresponding factors of the product basis. This result implies both a tight limit on the number of mutually unbiased product bases which the system can support and a complete classification of mutually unbiased product bases for multiple qubits or qutrits. In addition, only maximally entangled states can be mutually unbiased to a maximal set of mutually unbiased product bases.
OSTI ID:
22597047
Journal Information:
Journal of Mathematical Physics, Journal Name: Journal of Mathematical Physics Journal Issue: 3 Vol. 57; ISSN JMAPAQ; ISSN 0022-2488
Country of Publication:
United States
Language:
English

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