# Nijmegen Quantum Logic Group

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## Unordered tuples in Quantum Computation

02 Sep 2014 [ proceedings (QPL) · preprint · arXiv · video · slides ]

The star-algebra $$M_2 \otimes M_2$$ models a pair of qubits. We show in detail that $$M_{3} \oplus \mathbb{C}$$ models an unordered pair of qubits. Then we use the late 19th century Schur-Weyl duality, to characterize the star-algebra that models an unordered n-tuple of d-level quantum systems.

With more elementary Representation Theory and Number Theory, we characterize the quantum cycles. We finish with a characterization of the von Neumann algebra that models the unordered words.