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Creffield, Charles E. ; Háusler, Wolfgang ; Jefferson, John H ; Sarkar, Sarben | American Physical Society | 1999-04-15The low-lying eigenstates of a system of two electrons confined within a two-dimensional quantum dot with a hard polygonal boundary are obtained by means of exact diagonalization. The transition from a weakly correlated charge distribution for s[...]texto impreso
Creffield, Charles E. ; Jefferson, John H ; Sarkar,, Sarben ; Tipton, D. L. J. | American Physical Society | 2000-09-15The low-energy eigenstates of two interacting electrons in a square quantum dot in a magnetic field are determined by numerical diagonalization. In the strong correlation regime, the low-energy eigenstates show Aharonov-Bohm-type oscillations, w[...]texto impreso
Bayat, Abolfazl ; Creffield, Charles E. ; Jefferson, John H ; Pepper, Michael ; Bose, Sougato | IOP publishing ltd | 2015-10We show how single quantum dots, each hosting a singlet-triplet qubit, can be placed in arrays to build a spin quantum cellular automaton. A fast (? 10 ns) deterministic coherent singlet- triplet filtering, as opposed to current incoherent tunne[...]texto impreso
Garcia Coello, José ; Bayat, Abolfazl ; Bose, Sougato ; Jefferson, John H ; Creffield, Charles E. | American Physical Society | 2010-08-17We 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. [...]
