Seminário de Computação e Informação Quântica 

05/03/2010, 15:00 — 16:00 — Sala P4.35, Pavilhão de Matemática
Tomoyuki Morimae, U Lille

Macroscopic superposition in quantum information processing

Quantum properties of many-body states such as macroscopic superposition and large multipartite entanglement are essential resources for quantum information processing. In this talk, we study when and how macroscopic superposition appears in quantum many-body systems, such as a magnon system, quantum computers, and a quantum memory, and show that the emergence of such macroscopic superposition also causes large multipartite entanglement and low gate fidelity in the one-way quantum computation.