Quantum entanglement in lateral GaAs/AlGaAs quantum dot molecules
| V. Křápek, P. Klenovský, A. Rastelli, O. G. Schmidt, D. Munzar J. Phys. Conf. Ser. 245, 012027 (2010) URL PDF |
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| Abstract | |
| We calculate the excitonic structure of pairs of GaAs/AlGaAs quantum dots forming lateral molecules and obtain the entanglement of exciton states. The following advantages of the lateral geometry over the vertical one are found: (1) The energy structures of the dots forming a molecule can be in principle identical. (2) Comparable tunneling of electrons and holes ensures a high entanglement of antisymmetric excitons. A drawback of existing structures are very low tunneling energies, which make the entanglement vulnerable against differences in the sizes and shapes of both dots. |