RT Journal Article
T1 Spin filtering and entanglement swapping through coherent evolution of a single quantum dot
A1 Garcia Coello, José
A1 Bayat, Abolfazl
A1 Bose, Sougato
A1 Jefferson, John H
A1 Creffield, Charles
AB We exploit the nondissipative 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 Affleck-Kennedy-LiebTasaki 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 the choice of dot-size and initialization errors, as well as decoherence.
PB American Physical Society
SN 0031-9007
YR 2010
FD 2010-08-17
LK https://hdl.handle.net/20.500.14352/44732
UL https://hdl.handle.net/20.500.14352/44732
LA eng
NO ©2010 The American Physical Society.A. B. and S. B. are supported by the EPSRC. J. G. C. was supported by the QIPIRC. S. B. acknowledges the Royal Society and the Wolfson Foundation. C. E. C. was supported by the MICINN (Spain) through Grant No. FIS- 2007-65723, and the Ramón y Cajal Program. J. H. J. acknowledges support from the UK Ministry of Defence.
NO MICINN, Spain
NO EPSRC, UK
NO QIPIRC
NO Ramón y Cajal Program
NO Ministry of Defence, UK
DS Docta Complutense
RD 10 abr 2025