Serguei Vorojtsov
Math/Physics Bldg. room # 237

Duke University, Department of Physics
Box 90305, Durham, NC  27708
Tel: (919) 668-3547
Fax: (919) 660-2525 (write "for Serguei Vorojtsov" on each page)
Email: sv@phy.duke.edu
 
 

Publications

Quantum Dot Qubits

  • Phonon Decoherence of a Double Quantum Dot Charge Qubit.
    • Serguei Vorojtsov, Eduardo R. Mucciolo, and Harold U. Baranger, Phys. Rev. B 71, 205322 (2005)
    cond-mat/0412190   discuss cond-mat/0412190
    We study decoherence of a quantum dot charge qubit due to coupling to piezoelectric acoustic phonons in the Born-Markov approximation. After including appropriate form factors, we find that phonon decoherence rates are one to two orders of magnitude weaker than was previously predicted. We calculate the dependence of the Q-factor on lattice temperature, quantum dot size, and interdot coupling. Our results suggest that mechanisms other than phonon decoherence play a more significant role in current experimental setups.

  • Spin Qubits in Multi-Electron Quantum Dots.
    • Serguei Vorojtsov, Eduardo R. Mucciolo, and Harold U. Baranger, Phys. Rev. B 69, 115329 (2004)
    cond-mat/0308118   discuss cond-mat/0308118
    Are spin qubits in real multi-electron quantum dots feasible?

    Coulomb Blockade in Quantum Dots

  • Coulomb Blockade Conductance Peak Spacings: Interplay of Spin and Dot-Lead Coupling.
    • Serguei Vorojtsov and Harold U. Baranger, Phys. Rev. B 72, 165349 (2005)
    cond-mat/0505569   discuss cond-mat/0505569
    Calculation of the change in even and odd Coulomb blockade peak spacings due to finite dot-lead tunneling couplings in the framework of constant exchange and interaction (CEI) model.

  • Coulomb Blockade Oscillations of Conductance at Finite Energy Level Spacing in a Quantum Dot.
    • Serguei Vorojtsov, Int. J. Mod. Phys. B 18, 3915 (2004)
    cond-mat/0204329   discuss cond-mat/0204329
    Derivation of an analytical expression for the conductance of a single electron transistor in the case of equidistant energy levels in the quantum dot in the sequential tunneling approximation.

    Cellular Automata

  • Description of an Arbitrary Configuration Evolution in the Conway's Game Life in Terms of the Elementary Configurations Evolution in the First Generation.
    • Serguei Vorojtsov, PhysTech Journal, Volume 3, Number 3, pp.108-113 (1997)
    nlin.CG/0105009   discuss nlin.CG/0105009
    Rules for a cellular automata evolution are usually formulated in the "local" form. One can always formulate equivalent "global" rules and find out what the "fundamental interaction" is.


    Preprints

  • Magnetoexciton in Coupled Quantum Wells. Master of Science Diploma Thesis, MIPT, 1997.
    • Serguei Vorojtsov, Paper is available upon request.
    Complete calculation of the properties of two-dimensional space separated exciton in the strong magnetic field.


    Links

    arXiv1.org - Open Discussion of arXiv E-prints!