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The capacity of hybrid quantum memory
Colloquium| Speaker: | Greg Kuperberg, UC Davis |
| Location: | 693 Kerr |
| Start time: | Mon, Sep 30 2002, 4:10PM |
Description
I will discuss the notions
of qubits and qudits in quantum computation and
quantum information theory, and I will
introduce the notion of hybrid quantum
memory, a mutual generalization
of qubits and classical bits. In short,
a hybrid quantum memory unit is a
finite-dimensional C^*-algebra, or a direct
sum of matrix algebras.
Finally I will compute when one hybrid
quantum memory is better than another
in the bulk limit, assuming equal
memory performance. The answer involves
bin packing and the Cramer-Chernoff tail
estimate, borrowed from probability theory.