ELFT HÍRADÓ

[LORINCZ Andras <lorincz AT inf.elte.hu>]

Tisztelt Fizikus Kozosseg!

Foglalkoztam (valaha) kvantumrendszerek szabalyozasaval. Pikoszekundumos
tartomanyban
koherencia-szabalyozasi kiserleteket is folytattam. (Publikaciok listajat
csatolom.) Az elkepzeles igen
egyszeru volt: elektromos terrel, az atto-pikoszekundumos tartomanyban a
molekulak szabalyozhatoak.

Elmeleti szimulaciok ket konkluziot adtak:
1. Kiserletezni kell, mert a szamolasok
1.1. sok-sok nagysagrenddel hosszabbak, mint a kiserletek
1.2. a szamolasok soran en csak gondolom, hogy tudom a Sch egyenletet
1.3. a molekula valoban tudja azt
1.4. a szamolasokbol adodo elektromos teret a kiserletezo nem tudja
eloallitani,
1.5. a kiserletekben az elektromos ter 'in-situ' optimalizalhato.

2. Az optimalizacios eljarasok nem jok
2.1. vagy elakadnak lokalis minimumban
2.2. vagy nem tudnak megkuzdeni azzal a rendkivul nagy szabadsagi fokkal,
amivel az elektromos ter
rendelkezik (1 femtosec-nyi felbontas 1 picosec hosszan az 1000 szabadsagi
fok).

Az 1. kivul allt a lehetosegeimen, a 2. nem, igy elkezdtem optimalizacios
elmelettel foglalkozni.
Mostanra viszonylag jo tanulasi algoritmusokkal rendelkezem, amelyek mar
siker remenyeben hasznalhatoak
a kombinatorikus robbanas kulonbozo teruletein. (A publikaciok egy resze
fellelheto a
http://people.inf.elte.hu/lorincz/pub.html oldalon. Nehany hivatkozast
mellekeltem.)

Kozben jelentos valtozas tortent:

3. A kiserletekben -- reszben Herschel Rabitz vilagjaro es katalizalo
tevekenysege miatt is -- jelentos
elorelepes tortent. Mar vannak kiserletek, a terulet fejlodesnek indult.
Rabitz megkapja most januarban
a Willis E. Lamb medalt.

4. Osszeolvadoban van ket fontos temakor: a kvantumrendszerek szabalyozasa
es a kvantum-informatika

temakore. Mintegy 20 eves tavlatban jelentos elorehaladast josolnak a
szakertok mindket teruleten.
Nehany erdekesebbnek gondolt irodalmi hivatkozast is mellekelek.


A level mondandoja:
Ugy latom, hogy erdemes ujragondolni a lehetosegeket. Szimulaciokhoz es
kiserletekhez keresek partnert.
Szimulacios illetve kiserleti projektekben valo "reszvetelert cserebe"
szabalyozasi szoftvereket,
tanulo-algoritmusokat "adok" es "fejlesztek igeny eseten". Esetleges
pozitiv valaszokat "egyedul nem
megy" jelszora kerem a 
"lorincz AT inf.elte.hu"
 email cimre.
:-)

Udvozlettel,

Lorincz Andras


Irodalom:


Time-resolved organometallic photochemistry
Femtosecond fragmentation and adaptive control of CpFe(CO)2X (X=/Cl, Br,
I)
M. Bergt, T. Brixner, C. Dietl, B. Kiefer, G. Gerber
Journal of Organometallic Chemistry 661 (2002) 19/209
www.elsevier.com/locate/jorganchem

Nonlinear-optical vacuum ultraviolet generation at maximum atomic
coherence controlled by a
laser-induced Stark chirp of two-photon resonance
S.A. Myslivets, A.K. Popov, T. Halfmann, J.P. Marangos,
Thomas F. George
Optics Communications 209 (2002) 335–347
www.elsevier.com/locate/optcom

arXiv:quant-ph/0211137 v3 3 Dec 2002
Two-object remote quantum control
Yafei Yu, Tangkun Liu, Yanxia Huang, and Mingsheng Zhan

arXiv:quant-ph/0211042 v1 8 Nov 2002
Constructive control of quantum systems using
factorization of unitary operators
S. G. Schirmer, Andrew D. Greentree, Viswanath Ramakrishna and Herschel
Rabitz

arXiv:quant-ph/0208147 v1 24 Aug 2002
Forcing a unitary transformation by an external eld: comparingg
two approaches based on optimal control theory.
Jose P. Palao and Ronnie Kosloff

arXiv:quant-ph/0208109 v1 15 Aug 2002
Beable trajectories for revealing quantum control mechanisms
Eric Dennis, Herschel Rabitz

arXiv:quant-ph/0207134 v1 23 Jul 2002
Performing joint measurements and transformations on several qubits by
operating on a single `control'
qubit
Dominik Janzing, Thomas Decker, and Thomas Beth

arXiv:quant-ph/0211078 v1 13 Nov 2002
Einstein, Podolsky and Rosen versus Bohm and Bell
Andrei Khrennikov and Igor Volovich

arXiv:quant-ph/0107042 v2 13 Nov 2002
Optimization of coherent attacks in generalizations of the BB84 quantum
bit commitment protocol
R. W. Spekkens and T. Rudolphy

arXiv:quant-ph/0211068 v1 12 Nov 2002
MACROSCOPIC QUANTUM GAME
Andrey Grib and Georges Parfionov

Coherent Control and Measurement of Single Quantum Dots
Martino Poggio, Physics, Harvard University
University of California Santa Barbara Page 95 National Nanofabrication
Users Network

VOLUME 89, NUMBER 19 PHYSICAL REVIEW LETTERS 4 NOVEMBER 2002
Universal Fault-Tolerant Quantum Computation in the Presence
of Spontaneous Emission and Collective Dephasing
K. Khodjasteh and D. A. Lidar

arXiv:quant-ph/0211081 v2 15 Nov 2002
Dynamical Decoupling Using Slow Pulses: Efficient Suppression of 1/f
Noise
K. Shiokawa and D.A. Lidar

arXiv:quant-ph/0210185 v1 26 Oct 2002
QUANTUM COHERENCE, CORRELATED NOISE AND PARRONDO GAMES
CHIU FAN LEE and NEIL F. JOHNSON and FERNEY RODRIGUEZ and LUIS QUIROGA

arXiv:quant-ph/0005116 v2 23 May 2002
Universal Quantum Computation with the Exchange Interaction
D. P. DiVincenzo, D. Bacon, J. Kempe, G. Burkard, and K. B. Whaley

arXiv:quant-ph/0004064 v2 19 Apr 2000
Theory of Decoherence-Free Fault-Tolerant Universal Quantum Computation
J. Kempe, D. Bacon, D.A. Lidar and K.B. Whaley


Sajat kvantum hivatkozasok:

5. L. Andor, A. Lorincz, J. Siemion, D.D. Smith and S.A. Rice,
Shot-noise-limited detection scheme
for two-beam laser spectroscopies, Rev. Sci. Instrum. 55, 64-67 (1984).
(1.293)

7. A. Lorincz, F.A. Novak and S.A. Rice, Relaxation of large molecules
following ultrafast
excitation, Chem. Phys. Lett. 111, 322-325 (1984). (2.269)

8. A. Lorincz, D.D. Smith, F. Novak, R. Kosloff, D.J. Tannor and S.A.
Rice, Rotational state
dependence of pyrazine fluorescence: Initial decays for the vibrationless
1B3u state, J. Chem . Phys.
82, 1067-1072 (1985). (3.289)

9. F. Novak, R. Kosloff, D.J. Tannor, A. Lorincz, D.D. Smith and S.A.
Rice, Wave packet evolution
in isolated pyrazine molecules: Coherence triumphs over chaos, J. Chem
Phys. 82, 1073-1078 (1985).
(3.289)

34. T. Szakács, J. Somlói and A. L?rincz, Optimization of harmonic
oscillator wavefunction squeezing
in pulsed electronic transitions, Chem. Phys. 172, 1-6 (1993). (1.766)

36. Amstrup, A. L?rincz and S.A. Rice, Population inversion in a
multilevel system: A model study,
J. Phys. Chem. 97, 6175-6183 (1993). (3.265)

38. Amstrup, J.D. Doll, R.A. Sauerbrey, G. Szabó and A. L?rincz, Optimal
Control of Quantum Systems
by Chirped Pulses, Phys. Rev. A 48, 3830-3836 (1993). (2.639)

39. T. Szakács, T. Lucza and A. Lorincz, Optimal control of quantum
systems on metallic surfaces,
Surface Science 296, 251-260 (1993). (2.385)

43. G.J. Tóth, A. Lorincz, and H. Rabitz, The effect of control field and
measurement imprecision on
laboratory feedback control of quantum systems, J. Chemical Physics 101,
3715-3722 (1994). (3.289)

44. T. Szakács, B. Amstrup, P. Gross, R. Kosloff, H. Rabitz and A.
L?rincz, Locking a molecular
bond: A case study of CsI, Physical Review A 50, 2540-2547 (1994).
(2.639)

46. Amstrup, G. Szabó, R. Sauerbrey and A. L?rincz, Chirped pulse control
of CsI fragmentation: An
experimental possibility, Chemical Physics 188, 87-97 (1994). (1.766)

47. Amstrup, G.J. Tóth, G. Szabó, H. Rabitz and A. L?rincz, Genetic
algorithm with migration on
topology conserving maps for optimal control of quantum systems, J.
Physical Chemistry  99, 5206-5213
(1995). (3.265)

49. Amstrup, G.J. Tóth, H. Rabitz, and A. L?rincz, Identification of
Born-Oppenheimer Potential
Energy Surfaces of Diatomic Molecules from Optimized Chirped Pulses,
Chemical Physics, 201, 95-105
(1995). (1.766)

52. Space, H. Rabitz, A. Lorincz and P. Moore, Feasibility of using
photophoresis to create a
con-centration gradient of solvated molecules, J. Chemical Physics 105,
9515-9524 (1996). (3.289)

55. G. J.Tóth, A. Lorincz and H. Rabitz, The effect of quantum dispersion
on laboratory feedback
optimal control, J. Modern Optics, 44, 2049-2052 (1997). (1.475)


A temaban relevans, sajat, gepi-tanulas hivatkozasok:

45. Cs. Szepesvári and A. Lorincz, Behavior of an adaptive autonomous
agent working with cues and
competing concepts, Adaptive Behavior, 2, 131-160 (1994).

48. G.J. Tóth, Sz. Kovács and A. Lorincz, Genetic algorithm with alphabet
optimization, Biological
Cybernetics, 73, 61-68 (1995). (1.199)

56. Cs. Szepesvári and A. Lorincz, Robust control using inverse dynamics
neurocontrollers, Nonlinear
Analysis, Methods and Applications 30, 1669-1676 (1997). (0.266)

61. Zs. Kalmár, Cs. Szepesvári and A. Lorincz, Modul based reinforcement
learning: Experimenting
with a real robot, Machine Learning, 31, 55-85 (1998). (2.190)

78. B. Szatmáry, G. Szirtes, A. Lorincz, J. Eggert and E. Körner, Robust
hierarchical image
representation using non-negative matrix factorization with sparse code
shrinkage preprocessing  Pattern
Analysis and Applications (accepted). (0.607)

95.  A. Lorincz, I. Pólik and I. Szita, Event-learning and robust policy
heuristics, Cognitive
Systems Research (accepted). (N/A)

96. I. Szita, B. Takács and A. Lorincz, Epsilon-MDPs: Learning in varying
environments, Journal of
Machine Learning Research, 3, 145-174 (2002). (N/A)