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Can a universal quantum cloner be used to design an experimentally feasible near-deterministic CNOT gate?
A. Gueddana, P. Gholami, V. Lakshminarayanan·November 14, 2018·DOI: 10.1007/s11128-019-2339-x
PhysicsMathematicsComputer Science
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Abstract
We propose a non-deterministic CNOT gate based on a quantum cloner, a quantum switch based on all optical routing of single photon by single photon, a quantum dot spin in a double-sided optical microcavity with two photonic qubits, delay lines and other linear optical photonic devices. Our CNOT provides a fidelity of 78% with directly useful outputs for a quantum computing circuit and requires no ancillary qubits or electron spin measurements.