The Problem of Finding A Maximal Set of MUBs When d = 6
The smallest dimension that is not an integer power of a prime is d = 6. This is also the smallest dimension for which the number of mutually unbiased bases is not known. The methods used to determine the number of mutually unbiased bases when d is an integer power of a prime number cannot be used in this case. Searches for a set of four mutually unbiased bases when d = 6, both by using Hadamard matrices and numerical methods have been unsuccessful. The general belief is that the maximum number of mutually unbiased bases for d = 6 is .
Read more about this topic: Mutually Unbiased Bases
Famous quotes containing the words problem, finding and/or set:
“We have heard all of our lives how, after the Civil War was over, the South went back to straighten itself out and make a living again. It was for many years a voiceless part of the government. The balance of power moved away from it—to the north and the east. The problems of the north and the east became the big problem of the country and nobody paid much attention to the economic unbalance the South had left as its only choice.”
—Lyndon Baines Johnson (1908–1973)
“Again, the kingdom of heaven is like a merchant in search of fine pearls; on finding one pearl of great value, he went and sold all that he had and bought it.”
—Bible: New Testament, Matthew 13:45,46.
“Such a set of tittle tattle, prittle prattle visitants! Oh Dear! I am so sick of the ceremony and fuss of these fall lall people! So much dressing—chitchat—complimentary nonsense—In short, a country town is my detestation. All the conversation is scandal, all the attention, dress, and almost all the heart, folly, envy, and censoriousness.”
—Frances Burney (1752–1840)