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Nanodot-cavity electrodynamics and photon entanglement
Wang Yao1, Renbao Liu, L J Sham
1Department of Physics, University of California-San Diego, La Jolla, California 92093-0319, USA.
Physical Review Letters
|July 13, 2004
Summary
We propose a solid-state quantum controlled-phase gate using nanodots and microcavities to entangle photons. This method leverages giant optical nonlinearity for efficient quantum operations.
Area of Science:
- Quantum physics
- Solid-state physics
- Quantum optics
Background:
- Quantum electrodynamics of cavity excitons is crucial for quantum operations.
- Entanglement of photons is a key resource for quantum information processing.
Purpose of the Study:
- To present a theory for an integrable solid-state quantum controlled-phase gate.
- To generate entanglement of two photons using a coupled nanodot-microcavity-fiber structure.
Main Methods:
- Utilizing giant optical nonlinearity keyed by cavity excitons.
- Implementing electromagnetically induced transparency and pulse shaping for active control.
Main Results:
- Calculated a conditional phase shift of O(pi/10).
- Demonstrated the feasibility of generating photon entanglement via a solid-state device.
Conclusions:
- The proposed structure and control methods optimize the quantum efficiency of the gate operation.
- This work advances the development of solid-state quantum gates for practical quantum information applications.