This is me.    Łukasz Cywiński

   Institute of Physics
    Polish Academy of Sciences
    al. Lotników 32/46
    PL-02-668 Warsaw, Poland  

    phone: (+48 22) 843-6601 ext. 3501
    email: lcyw (at) ifpan (dot) edu (dot) pl
 
    I am an adjunct in the Group of Spin Phenomena Physics SL2.2

    Research interests
    Publications
    Links


Research interests:
     - (III,Mn)V ferromagnetic semiconductors
    - quantum dots containing transition metal ions (Mn spins)
    - decoherence of spin qubits due to hyperfine interaction with nuclei
       - spin qubits in silicon quantum dots
    - decoherence due to classical noise and dynamical decoupling from it
    - spin diffusion and its electrical expression in semiconductors
    - ultrafast light-induced demagnetization

Publications:

18) D. Culcer, L. Cywinski, Q. Li, X. Hu, and S. Das Sarma, "Quantum dot spin qubits in Silicon: Multivalley physics",
    arXiv:1001.5040

17) Q. Li, L. Cywinski, D. Culcer, X. Hu, and S. Das Sarma, "Exchange coupling in silicon quantum dots: theoretical considerations for quantum computation",
    Phys. Rev. B 81, 085313 (2010)
    arXiv:0906.4793

16) L. Cywinski, W.M. Witzel, and S. Das Sarma, "Pure quantum dephasing of a solid state electron spin qubit in a large nuclear spin bath coupled by long-range hyperfine-mediated interactions",
    Phys. Rev. B 79, 245314 (2009)
    arXiv:0903.2256

15) D. Culcer, L. Cywinski, Q. Li, X. Hu, and S. Das Sarma, "Realizing singlet-triplet qubits in multivalley Si quantum dots",
    Phys. Rev. B 80, 205302 (2009)
    arXiv:0903.0863

14) L. Cywinski, W.M. Witzel, and S. Das Sarma, "Electron Spin Dephasing due to Hyperfine Interactions with a Nuclear Spin Bath",
    Phys. Rev. Lett. 102, 057601 (2009),
    arXiv:0809.0003

13) J. Wang, L. Cywinski, C. Sun, J. Kono, H. Munekata, and L.J. Sham, "Femtosecond demagnetization and hot hole relaxation in ferromagnetic GaMnAs",
    Phys. Rev. B 77, 235308 (2008)
    arXiv:0804.0451

12) R.M. Lutchyn, L. Cywinski, C.P. Nave, and S. Das Sarma, "A Spin-Fermion Model for Solid State Quantum Decoherence",
    Phys. Rev. B 78, 024508 (2008)
    arXiv:0803.3452

11) L. Cywinski, R.M. Lutchyn, C.P. Nave, and S. Das Sarma, "How to enhance dephasing time in superconducting qubits"
    Phys. Rev. B 77, 174509 (2008)
    arXiv:0712.2225

10) L. Cywinski, H. Dery, P. Dalal, and L.J, Sham, “Electrical expression of spin accumulation in ferromagnet/semiconductor structures”,
    Mod. Phys. Lett. B 21, 1509 (2007),
    arXiv:0709.2707

9) L. Cywinski and L.J. Sham, "Ultrafast demagnetization in the sp-d model: a theoretical study",
     Phys. Rev. B 76, 045205 (2007)
     cond-mat/0703049

8) H. Dery, P. Dalal, L. Cywinski, and L.J. Sham, "Spin-based logic in semiconductors for reconfigurable large-scale circuits",
    Nature 447, 573 (2007)
 
7) J. Wang, C. Sun, Y. Hashimoto, J. Kono, G.A. Khodaparast, L. Cywinski, L.J. Sham, G.D. Sanders, C.J. Stanton, H. Munekata, "Ultrafast Magneto-Optics in Ferromagnetic III-V Semiconductors",
    J. Phys.: Condens. Matter 18, R501 (2006)
 
6) H. Dery, L. Cywinski, and L.J. Sham, "Spintronics for electrical measurement of light polarization",
    J. Appl. Phys. 100, 063713 (2006),
    cond-mat/0512712
 
5) L. Cywinski, H. Dery, and L.J. Sham, "Electric readout of magnetization dynamics in a ferromagnet-semiconductor system",
    Appl. Phys. Lett. 89, 042105 (2006),
    cond-mat/0601642
 
4) K. Dziatkowski, L. Cywinski, W. Bardyszewski, A. Twardowski, H. Saito, and K. Ando, "Influence of disorder on the optical absorption in semiconductors: Application to epitaxially grown III-V compounds",
    Phys. Rev. B 73, 235340 (2006)

3) H. Dery, L. Cywinski, and L.J. Sham, "Spin transference and magnetoresistance amplification in a transistor",
    Phys. Rev. B 73, 161307(R) (2006),
    cond-mat/0507378
 
2) H. Dery, L. Cywinski, and L.J. Sham, "Lateral diffusive spin transport in layered structures",
    Phys. Rev. B 73, 041306(R) (2006),
    cond-mat/0510770
 
1) J. Wang, C. Sun, J. Kono, A. Oiwa, H. Munekata, L. Cywinski, and L.J. Sham, "Ultrafast quenching of ferromagnetism in InMnAs induced by intense laser irradiation",
    Phys. Rev. Lett. 95, 167401 (2005),
    cond-mat/0504611


Links:

Ferromagnetic semiconductors:
 Collaborators (the ones who have proper websites):
Recommended reading in case of not feeling like doing actual work:




Last updated on February 11th 2010.