Two-electron quantum dots as scalable qubits

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 66, Issue 4, 2002, Pages 423281-4232811

  Jefferson, J H ^a   Fearn, M ^a   Tipton, D L J ^a   Spiller, T P ^b  

^a QINETIQ   (United Kingdom)

^b HEWLETT PACKARD LABORATORIES   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

EIGENVALUES AND EIGENFUNCTIONS; ELECTRON TUNNELING; ELECTRONS; GROUND STATE; MAGNETIC FIELD EFFECTS; QUANTUM THEORY; VECTORS;

ELECTROSTATIC GATES;

SEMICONDUCTOR QUANTUM DOTS;

EID: 0036819057     PISSN: 10502947     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

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51. This is in fact an approximation since the Schrödinger equation is not strictly separable and integration over the lowest bound state in the z direction modifies the Coulomb interaction. However, the error due to this approximation is small and unimportant for what follows.
52. In fact φ = BA, where A is abd effective area of the dot which is slightly smaller than its actual area, reflecting the fact that the charge density peaks for the electrons are not precisely in the corners of the dot.
53. In fact the role of singlets and triplets reverse for half flux quantum through the dot. It is straightforward to show that the electrons have the same behavior as fictitious hard-core spin-bosons. The "particles" may be regarded as "composite fermions" for this two-electron system.