Solid-State Optimal Phase-Covariant Quantum Cloning Machine

Abstract

Here we report an experimental realization of optimal phase-covariant quantum cloning machine with a single electron spin in solid state system at room temperature. The involved three states of two logic qubits are encoded physically in three levels of a single electron spin with two Zeeman sub-levels at a nitrogen-vacancy defect center in diamond. The preparation of input state and the phase-covariant quantum cloning transformation are controlled by two independent microwave fields. The average experimental fidelity reaches 85.2% which is very close to theoretical optimal fidelity 85.4% and is beyond the bound 83.3% of universal cloning.

3 pages; 5 figures

References in corpus (7)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Dynamical Decoupling of a single electron spin at room temperature
• Restoring Coherence Lost to a Slow Interacting Mesoscopic Bath
• Room-temperature implementation of the Deutsch-Jozsa algorithm with a single electronic spin in diamond
• Experimental Realization of $1\to 2$ Asymmetric Phase-Covariant Quantum Cloning
• NMR Experimental Demonstration of Probabilistic Quantum Cloning
• Enhanced Resolution of Lossy Interferometry by Coherent Amplification of Single Photons

Cited by in corpus (4)

• Quantum Cloning Machines and the Applications
• Demonstration of Entanglement-Enhanced Phase Estimation in Solid
• Unified Universal Quantum Cloning Machine and Fidelities
• Photonic quantum simulator for unbiased phase covariant cloning