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Novel Quantum Optics Phenomena and Quantum Entanglement in Nano-Structures

Professor Xue-Hua Wang

School of Physics & Engineering, Sun Yat-Sen University, People’s Republic of China

Tuesday, 11 December 2007, 2.00pm, EN101, Ground Floor, Engineering Building, Hawthorn.

In recent years, there has been growing interest in novel quantum optics phenomena of nanostrucres, such as photonic crystals and nano-metal structures. In this talk, I will firstly introduce a general theoretical treatment on spontaneous emission of atoms in photonic crystals (PCs) developed by us, based upon the Green function method of the evolution operator in which the position- dependent photon-atom interaction is taken account into. Within this theoretical framework, we successfully clarified the tremendous discrepancy between different experiments, and predicted some novel quantum optics phenomena, such as the non-classical envelope-damped Rabi oscillation, the giant Lamb shifts, switching control between the inhibition and enhancement of the atomic SE. We also generalized the position-dependent photon-atom interaction into nano-metal structures to develop an unified treatment on fluorescence and raman scattering processes near metal surfaces. Then, I will discuss the possible application of photonic crystals to quantum computation and quantum information and briefly introduce some important steps, and show distant quantum entanglement in solid system via photonic band gap effect. This would fairly facilitate the addressing and scalability of the qubits which are essential for solid state quantum computers.

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