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Universal quantum computation using only projective measurement, quantum memory, and preparation of the 0 state

Michael A. Nielsen
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Abstract

What resources are universal for quantum computation? In the standard model, a quantum computer consists of a sequence of unitary gates acting coherently on the qubits making up the computer. This paper shows that a very different model involving only projective measurements, quantum memory, and the ability to prepare the |0> state is also universal for quantum computation. In particular, no coherent unitary dynamics are involved in the computation.

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Michael A. Nielsen. 2001-08-06. Universal quantum computation using only projective measurement, quantum memory, and preparation of the 0 state. https://doi.org/10.1016/s0375-9601(02)01803-0

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