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 SL-2.2
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:
21) W.M. Witzel, M.S. Carroll, A.
Morello, Ł. Cywiński, and S. Das Sarma, "Electron spin decoherence in
isotope-enriched silicon",
arXiv:1008.2382
20) Ł. Cywiński, "Optical orientation of a single Mn spin
in a quantum dot: the role of carrier spin relaxation",
Phys. Rev. B
82, 075321 (2010)
arXiv:1006.1866
19) Ł. Cywiński, V.V. Dobrovitski, and
S. Das Sarma, "Spin echo decay at low magnetic fields in
a nuclear spin bath",
Phys. Rev. B
82, 035315 (2010)
arXiv:1004.0329
18) D. Culcer, Ł. Cywiński, Q. Li, X.
Hu, and S. Das Sarma, "Quantum dot spin qubits in Silicon:
Multivalley physics",
arXiv:1001.5040
17) Q. Li, Ł. Cywiński, 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) Ł. Cywiński, 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, Ł. Cywiński, 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) Ł. Cywiński, 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, Ł. Cywiński, 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, Ł.
Cywiński, 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) Ł. Cywiński, 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) Ł. Cywiński, 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) Ł. Cywiński 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, Ł. Cywiński, 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, Ł.
Cywiński, 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, Ł. Cywiński, and L.J. Sham,
"Spintronics for electrical measurement of light polarization",
J.
Appl. Phys. 100, 063713 (2006),
cond-mat/0512712
5) Ł. Cywiński, 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, Ł. Cywiński, 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, Ł. Cywiński, 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, Ł. Cywiński, 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, Ł. Cywiński, 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):
Journals:
Recommended reading in case
of not feeling like doing actual work:
Last updated on August 22nd 2010.
Łukasz
Cywiński