Schroedinger's Register: Foundational Issues and Physical Realization
Abstract
This work-in-progress paper consists of four
points which relate to the foundations and physical realization
of quantum computing. The first point is that the qubit
cannot be taken as the basic unit for quantum computing,
because not every superposition of bit-strings of length n can
be factored into a string of n-qubits. The second point is
that the “No-cloning” theorem does not apply to the copying
of one quantum register into another register, because the
mathematical representation of this copying is the identity
operator, which is manifestly linear. The third point is that
quantum parallelism is not destroyed only by environmental
decoherence. There are two other forms of decoherence, which
we call measurement decoherence and internal decoherence, that
can also destroy quantum parallelism. The fourth point is that
processing the contents of a quantum register “one qubit at a
time” destroys entanglement.
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Archival date: 2015-11-21
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2010-10-28
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2010-10-28
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Recent downloads (6 months)
16 ( #39,489 of 58,222 )
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