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The limitations of nice mutually unbiased bases
Quantum Physics · Submitted 8 Dec 2004
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We show that the number of resulting mutually unbiased bases can be at most one plus the smallest prime power contained in the dimension, and therefore that this construction cannot improve upon previous approaches.
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The abstract, sentence by sentence
Mutually unbiased bases of a Hilbert space can be constructed by partitioning a unitary error basis. We consider this construction when the unitary error basis is a nice error basis. We show that the number of resulting mutually unbiased bases can be at most one plus the smallest prime power contained in the dimension, and therefore that this construction cannot improve upon previous approaches. We prove this by establishing a correspondence between nice mutually unbiased bases and abelian subgroups of the index group of a nice error basis and then bounding the number of such subgroups. This bound also has implications for the construction of certain combinatorial objects called nets.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Mutually unbiased bases of a Hilbert space can be constructed by partitioning a unitary error basis. | background 1.00 | 0.07 | 0.02 | asserted 0.90 |
| s1 | We consider this construction when the unitary error basis is a nice error basis. | contribution 0.59 | 0.44 | 0.02 | asserted 0.68 |
| s2 | We show that the number of resulting mutually unbiased bases can be at most one plus the smallest prime power contained in the dimension, and therefore that this construction cannot improve upon previous approaches. | result 0.96 | 0.94 | 0.94 | asserted 0.99 |
| s3 | We prove this by establishing a correspondence between nice mutually unbiased bases and abelian subgroups of the index group of a nice error basis and then bounding the number of such subgroups. | method 0.98 | 0.95 | 0.09 | asserted 1.00 |
| s4 | This bound also has implications for the construction of certain combinatorial objects called nets. | interpretation 0.99 | 0.67 | 0.03 | asserted 0.92 |
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Original abstract
Mutually unbiased bases of a Hilbert space can be constructed by partitioning a unitary error basis. We consider this construction when the unitary error basis is a nice error basis. We show that the number of resulting mutually unbiased bases can be at most one plus the smallest prime power contained in the dimension, and therefore that this construction cannot improve upon previous approaches. We prove this by establishing a correspondence between nice mutually unbiased bases and abelian subgroups of the index group of a nice error basis and then bounding the number of such subgroups. This bound also has implications for the construction of certain combinatorial objects called nets.
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[ref] to study mutually unbiased bases in $ℋ,$ see also [ref] , [ref] , [ref] , [ref] and [ref] .
Invariants for maximally entangled vectors and unitary bases · Basics · 0.93
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