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Spin Filtering and Entanglement Swapping through Coherent Evolution of a Single Quantum Dot by Coello, Jose Garcia; Bayat, Abolfazl; Bose, Sougato; Jefferson, John H.; Creffield, Charles E. is a scholarly article available to read on EtoBox.

What is Spin Filtering and Entanglement Swapping through Coherent Evolution of a Single Quantum Dot about?

We exploit the non-dissipative dynamics of a pair of electrons in a large square quantum dot to perform singlet-triplet spin measurement through a single charge detection and show how this may be used for entanglement swapping and teleportation. The method is also used to generate the AKLT ground state, a further resource for quantum computation. We justify, and derive analytic results for, an effective charge-spin Hamiltonian which is valid over a wide range of parameters and agrees well with exact numerical results of a realistic effective-mass model. Our analysis also indicates that the method is robust to choice of dot-size and initialization errors, as well as decoherence introduced by the hyperfine interaction.

Author

Coello, Jose Garcia; Bayat, Abolfazl; Bose, Sougato; Jefferson, John H.; Creffield, Charles E.

Published

2010

Language

EN