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Quantum
Information and Computation
ISSN: 1533-7146
published since 2001
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Vol.3 No.4, July 2003 |
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Non-empty
quantum dot as a spin-entangler
(pp307-316)
C.-L. Chou
doi:
https://doi.org/10.26421/QIC3.4-2
Abstracts:
We consider a three-port single-level quantum dot system
with one input and two output leads. Instead of considering an empty
dot, we study the situations that two input electrons co-tunnel through
the quantum dot occupied by one or two dot electrons. We show that
electron entanglement can be generated via the co-tunneling processes
when the dot is occupied by two electrons, yielding non-local
spin-singlet states at the output leads. When the dot is occupied by a
single electron, we show that by carefully selecting model parameters
non-local spin-triplet electrons can also be obtained at the output
leads if the final dot electron has the same spin as that of the initial
dot electron.
Key words: quantum
dot, spin entangler, electron entanglement |
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