# PlanetPhysics/Category of Quantum Automata

Let us recall that as a Quantum Algebraic Topology object, a *quantum automaton* is defined by the quantum
triple ), where is a *(locally compact) quantum groupoid*,
are the unitary representations of on rigged Hilbert spaces of quantum states and quantum operators on the Hilbert space , and is the transformation, or
*automorphism* equivalence relation of quantum transitions that represents all flip-flop quantum transitions of one cubit each between the permitted quantum states of the quantum automaton.

With the data from above definition we can now define also the category of quantum automata as follows.

The *category of quantum automata*
is defined as an *algebraic category* category of logic algebras whose objects are triples (where is either a Hilbert space or a rigged Hilbert space of quantum states and operators acting on
, and is a measure related to the quantum logic, , and (quantum) transition probabilities of this quantum system), and whose morphisms are defined between such triples by homomorphisms of Hilbert spaces,
, naturally compatible with the operators , and by homomorphisms between the associated Haar measure systems.

An alternative definition is also possible based on *Quantum Algebraic Topology* .

A *quantum algebraic topology* definition of the Cod of quantum algebraic automata involves the objects specified above in **Definition 0.1** as quantum automaton triples ,
and quantum automata homomorphisms defined between such triples; these morphisms are defined by
groupoid homomorphisms and , together
with unitarity preserving mappings * between unitary representations of on rigged Hilbert spaces
(or Hilbert space bundles).
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