Linear optical implementation of ancilla-free 1→3 optimal phase covariant quantum cloning machines for the equatorial qubits
Xu‐Bo Zou, Wolfgang M. Mathis
We propose experimental schemes to implement ancilla-free $1\ensuremath{\rightarrow}3$ optimal phase covariant quantum cloning machines for $x\text{\ensuremath{-}}y$ and $x\text{\ensuremath{-}}z$ equatorial qubits by interfering a polarized photon, which we wish to clone, with different light resources at a six-port symmetric beam splitter. The scheme requires linear optical elements and three-photon coincidence detection, and is feasible with current experimental technology.
Physical Review A•Aug 8, 2005•21 citations