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Q: Fachverband Quantenoptik und Photonik
Q 64: Quanteneffekte: Verschränkung
Q 64.7: Talk
Friday, March 6, 2009, 15:30–15:45, VMP 6 HS-D
Coherent single surface-plasmon transport in a nanowire coupled to double quantum dots — •Guang-Yin Chen1,2, Yueh-Nan Chen3, Niel Lambert4, Florian Mintert2, Der-San Chuu5, and Andreas Buchleitner2 — 1Institute of Physics, National Chiao Tung University, Hsinchu 300, Taiwan — 2Albert-Ludwigs-Universität Freiburg, Physikalisches Institut, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany — 3Department of Physics and National Center for Theoretical Sciences, National Cheng-Kung University, Tainan 701, Taiwan — 4Digital Materials Lab, Single Quantum Dynamics Research Group, FRS, Riken, Wako, Saitama 351-0198, Japan — 5Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan
We theoretically study coherent single surface-plasmon transport in a nanowire strongly coupled to two quantum dots. Using a real-space Hamiltonian we find analytical expressions for the transmission and reflection coefficients and dot-dot entanglement. Our results show that remotely entangled states can be created if the separation between the two dots is equal to multiple half-wavelength of the plasmon. Furthermore, by applying classical laser pulses to the quantum dots, the entangled states can be stored in metastable states which are decoupled from the surface plasmons. We also investigate dissipative effects due to "non-connecting" surface-plasmon modes.
[1] J.T. Shen and S. Fan, Phys. Rev. Lett. 95, 213001 (2005).
[2] D. E. Chang, A. S. Sørensen, E. A. Demler, and M. D. Lukin, Nature Physics 3, 807 (2007).