Single-qubit, entanglement-assisted and ancilla-assisted quantum process tomography
Joseph B. Altepeter, David Branning, Evan R. Jeffrey, Chia-Hung Wei, Paul G. Kwiat, Rob Thew, Jeremy L. O’Brien, Michael A. Nielsen, Andrew G. White · 2003
Quantum process tomography allows complete and precise characterization of a quantum operation. We report quantum process tomography of unitary, decohering, and partially polarizing operations using single-qubit, maximally entangled, and non-entangled input states.