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Coherent quantum switch driven by optimized laser pulses

AuthorsRäsänen, E.; Castro, Alberto; Werschnik, J.; Rubio, Angel ; Gross, E. K. U.
KeywordsOptimal control theory
Quantum ring
Double quantum dot
Issue Date11-Oct-2007
CitationPhysica E: Low-dimensional Systems & Nanostructures 40(5): 1593-1595 (2008)
AbstractWe present two models of coherent quantum switches constructed from a single-electron quantum ring and a double quantum dot, respectively. The systems are driven by picosecond laser pulses obtained using quantum optimal control theory. The optimized pulses generate electron-current flips in the ring (magnetic switch) and electron transport in the double dot (charge switch) in significantly shorter times and higher accuracies than previously used finite-length continuous waves. This opens applicable paths into coherent single-qubit gates operated by terahertz lasers.
Description3 pages, 3 figures.-- PACS nrs.: 78.67.−n; 73.23.Ra; 78.20.Bh.-- El pdf del artículo es la versión pre-print.
Publisher version (URL)http://dx.doi.org/10.1016/j.physe.2007.09.181
Appears in Collections:(CFM) Artículos
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