Single spin measurement using cellular automata techniques

Details Single spin measurement using cellular automata techniques Single spin measurement using cellular automata techniques

2006-01-09

arxiv.org/abs/quant-ph/0601054v1

Physical Review Letters 97, 100501 (2006).

Physics

Quantum Physics

Submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.97.100501

We propose an approach for single spin measurement. Our method uses techniques from the theory of quantum cellular automata to correlate a large amount of ancillary spins to the one to be measured. It has the distinct advantage of being efficient, and to a certain extent fault-tolerant. Under ideal conditions, it requires the application of only order of cube root of N steps (each requiring a constant number of rf pulses) to create a system of N correlated spins. It is also fairly robust against pulse errors, imperfect initial polarization of the ancilla spin system, and does not rely on entanglement. We study the scalability of our scheme through numerical simulation.

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