A Hamiltonian for quantum copying
Quantum Physics
2014-11-18 v2 Materials Science
Abstract
We derive an explicit Hamiltonian for copying the basis up and down states of a quantum two-state system - a qubit - onto n "copy" qubits initially all prepared in the down state. In terms of spin components, for spin-1/2 particle spin states, the resulting Hamiltonian involves n- and (n+1)-spin interactions. The case n=1 also corresponds to a quantum-computing controlled-NOT gate.
Cite
@article{arxiv.quant-ph/9609018,
title = {A Hamiltonian for quantum copying},
author = {Dima Mozyrsky and Vladimir Privman and Mark Hillery},
journal= {arXiv preprint arXiv:quant-ph/9609018},
year = {2014}
}
Comments
16 pages in plain TeX