Nonlocal biphoton generation in Werner state from a single semiconductor quantum dot

Abstract

We demonstrate Werner-like polarization-entangled state generation disapproving local hidden variable theory from a single semiconductor quantum dot. By exploiting tomographic analysis with temporal gating, we find biphoton states are mapped on the Werner state, which is crucial for quantum information applications due to its versatile ramifications such as usefulness to teleportation. Observed time evolution of the biphoton state brings us systematic understanding on a relationship between tomographically reconstructed biphoton state and a set of parameters characterizing exciton state including fine-structure splitting and cross-dephasing time.

5 pages, 4 figures

References in corpus (8)

• Entangled Photon Pairs from Semiconductor Quantum Dots
• Proposal for Implementing Device-Independent Quantum Key Distribution based on a Heralded Qubit Amplification
• Electric-field-induced coherent coupling of the exciton states in a single quantum dot
• Magnetic-field-induced reduction of the exciton polarization splitting in InAs quantum dots
• Coherence of an Entangled Exciton-Photon State
• Evolution of entanglement within classical light states
• Optimizing type-I polarization-entangled photons
• All quantum states useful for teleportation are nonlocal resources