Entanglement Purification for Mixed Entangled Quantum Dot States via Superconducing Transmission Line Resonators
DONG Ping1,3, ZHANG Gang2, CAO Zhuo-Liang1
1Department of Physics and Electronic Engineering, Hefei Normal University, Hefei 230061 2Department of Mathematics and Physics, West Anhui University, Lu'an 237012 3Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education), Anhui University, Hefei 230039
Entanglement Purification for Mixed Entangled Quantum Dot States via Superconducing Transmission Line Resonators
DONG Ping1,3, ZHANG Gang2, CAO Zhuo-Liang1
1Department of Physics and Electronic Engineering, Hefei Normal University, Hefei 230061 2Department of Mathematics and Physics, West Anhui University, Lu'an 237012 3Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education), Anhui University, Hefei 230039
摘要An entanglement purification protocol for mixed entangled states is presented via double quantum dot molecules inside a superconducing transmission line resonator (TLR). In the current scenario, coupling for arbitrary double quantum dot molecules can be tuned via the TLR in the large detuning region by controlling the qubit level splitting. The TLR is always empty and only virtually excited, so the interaction is insensitive to both the TLR decay and thermal field. Discussion about the feasibility of our scheme shows that the entanglement purification can be implemented with high fidelity and successful probability.
Abstract：An entanglement purification protocol for mixed entangled states is presented via double quantum dot molecules inside a superconducing transmission line resonator (TLR). In the current scenario, coupling for arbitrary double quantum dot molecules can be tuned via the TLR in the large detuning region by controlling the qubit level splitting. The TLR is always empty and only virtually excited, so the interaction is insensitive to both the TLR decay and thermal field. Discussion about the feasibility of our scheme shows that the entanglement purification can be implemented with high fidelity and successful probability.
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2010, Vol. 27 
