Experimental reversion of the optimal quantum cloning and flipping processes
arXiv:quant-ph/0504212 · doi:10.1103/PhysRevA.73.040303
Abstract
The quantum cloner machine maps an unknown arbitrary input qubit into two optimal clones and one optimal flipped qubit. By combining linear and non-linear optical methods we experimentally implement a scheme that, after the cloning transformation, restores the original input qubit in one of the output channels, by using local measurements, classical communication and feedforward. This significant teleportation-like method demonstrates how the information is preserved during the cloning process. The realization of the reversion process is expected to find useful applications in the field of modern multi-partite quantum cryptography.
10 pages, 3 figures
References in corpus (23)
- Quantum Cryptography
- Quantum secret sharing
- Concentrating Partial Entanglement by Local Operations
- On the Measurement of Qubits
- Quantum Copying: Beyond the No-Cloning Theorem
- Local versus non-local information in quantum information theory: formalism and phenomena
- Incoherent and Coherent Eavesdropping in the 6-state Protocol of Quantum Cryptography
- Maximum efficiency of a linear-optical Bell-state analyzer
- Experimental Controlled-NOT Logic Gate for Single Photons in the Coincidence Basis
- Optimal universal quantum cloning and state estimation
- Experimental Quantum Cloning of Single Photons
- Quantum teleportation via a W state
- Spin flips and quantum information for anti-parallel spins
- Quantum Lost and Found
- Teleportation scheme implementing contextually the Universal Optimal Quantum Cloning Machine and the Universal Not Gate. Complete experimental realization
- ''Active'' Teleportation of a Quantum Bit
- Contextual, Optimal and Universal Realization of the Quantum Cloning Machine and of the NOT gate
- Separating the classical and quantum information via quantum cloning
- Relations between cloning and the universal NOT from conservation laws
- Realization of Universal Optimal Quantum Machines by Projective Operators and Stochastic Maps
- Quantum Cloning and Distributed Measurements
- On balance of information in bipartite quantum communication systems: entanglement-energy analogy
- Reversibility of continuous-variable quantum cloning