Universal discriminator for completely unknown optical qubits

Abstract

We propose an experimental setup that is capable of unambiguously discriminating any pair of linearly independent single photon polarization qubits, about which we don't have any knowledge except that an extra pair of these unknown states are provided as the reference. This setup, which is constructed with optical CNOT gates, weak cross Kerr non-linearities, Bell state analysers and other linear optical elements, transforms the unknown triple photon input states to the corresponding single photon states to be deterministically processed by linear optics circuit. The optimal discrimination of the unknown states is achieved by this setup.

accepted publication version in PRA

References in corpus (10)

• A near deterministic linear optical CNOT gate
• Quantum Teleportation with a Complete Bell State Measurement
• Demonstration of a simple entangling optical gate and its use in Bell-state analysis
• Experimental demonstration of a non-destructive controlled-NOT quantum gate for two independent photon-qubits
• A universal programmable quantum state discriminator that is optimal for unambiguously distinguishing between unknown states
• Unambiguous pure state identification without classical knowledge
• Experimental Realization of a Photonic Bell-State Analyzer
• A general approach to physical realization of unambiguous quantum-state discrimination
• Programmable unknown quantum-state discriminators with multiple copies of program and data: A Jordan basis approach
• Optimal universal programmable detectors for unambiguous discrimination

Cited by in corpus (13)

• Nonlocal entanglement concentration scheme for partially entangled multipartite systems with nonlinear optics
• Efficient single-photon-assisted entanglement concentration for partially entangled photon pairs
• Efficient two-step entanglement concentration for arbitrary W states
• Cross-Kerr nonlinearity between continuous-mode coherent states and single photons
• Processing multi-photon state through operation on single photon: methods and applications
• Highly Efficient Processing Multi-photon States
• Using quantum routers to implement quantum message authentication and Bell-state manipulation
• Optimum unambiguous identification of d unknown pure qudit states
• Efficient hybrid entanglement concentration for quantum communications
• Success probabilities for universal unambiguous discriminators between unknown pure states
• Symmetric construction of reference-frame-free qudits
• Multiple multi-control unitary operations: implementation and applications
• Optimal programmable unambiguous discriminator between two unknown latitudinal states