Using classical probability to guarantee properties of infinite quantum sequences

Jun, 1995
7 pages
Published in:
  • Phys.Rev.A 52 (1995) 3560
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Abstract:
We consider the product of infinitely many copies of a spin-121\over 2 system. We construct projection operators on the corresponding nonseparable Hilbert space which measure whether the outcome of an infinite sequence of σ x\sigma~x measurements has any specified property. In many cases, product states are eigenstates of the projections, and therefore the result of measuring the property is determined. Thus we obtain a nonprobabilistic quantum analogue to the law of large numbers, the randomness property, and all other familiar almost-sure theorems of classical probability.
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  • 7 pages in LaTeX