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141. http://qi.phys.msu.ru/kulik/Papers/comment.pdf
VOLUME 86, NUMBER 20 PHYS ICAL REVIEW LETTERS (a) 3200 2400 1600 14 M (b) 2000 1600 1200 800 400 AY 2001 Comment on "Dispersion-Independent High-Visibility Quantum Interference in Ultrafast Parametric Down-Conversion" Recently AtatЭre et al. claimed to "recover" highvisibility quantum interference in femtosecond pulse pumped type-II spontaneous parametric down-conversion (SPDC ) using neither spectral postselection nor a thin nonlinear crystal [1]. ... This is what AtatЭre et al. observed in Ref. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/comment.pdf -- 73.2 Кб -- 16.10.2004
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142. http://qi.phys.msu.ru/kulik/Papers/pR4645_1.pdf
... In the case when the beam diameter exceeds the coherence length of the acoustic wave, the fourth-order correlation function is found to contain an interference structure, whereas the intensity angular distribution has a one-peak shape. ... In the present paper we show how the measurement of the intensity correlation function of light scattered by acoustic waves can provide information that is not contained in the intensity distribution. ... The wave vector of the acoustic wave is denoted by k a . ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/pR4645_1.pdf -- 88.7 Кб -- 16.10.2004
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143. http://qi.phys.msu.ru/kulik/Papers/p3214_1.pdf
PHYSICAL REVIEW A VOLUME 56, NUMBER 4 OCTOBER 1997 Interference effects in spontaneous two -photon parametric scattering from two macroscopic regions A. V. Burlakov,1 M. V. Chekhova,1 D. N. Klyshko,1 S. P. Kulik,1 A. N. Penin,1 Y. H. Shih,2 and D. V. Strekalov2 ... Moscow, Russia Physics Department, University of Maryland, Baltimore County, Baltimore, Maryland 21228 Received 6 March 1997 1 Two types of interference were observed using ... 2.25 56 INTERFERENCE EFFECTS IN SPONTANEOUS TWO- . ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/p3214_1.pdf -- 684.7 Кб -- 16.10.2004
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144. http://qi.phys.msu.ru/kulik/Papers/p1_1.pdf
... The which-path or both-path information of a quantum can be marked or erased by its entangled twin even after the registration of the quantum. ... One could even erase or mark the which-path information after the registration of the quantum and still determine its earlier behavior to be either wave or particle [6]. ... Photon 1, propagating to the right, is registered by detector D0 , which can be scanned by a step motor along its x axis for the observation of interference fringes. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/p1_1.pdf -- 85.4 Кб -- 16.10.2004
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145. http://qi.phys.msu.ru/kulik/Papers/pR37_1.pdf
RAPID COMMUNICATIONS PHYSICAL REVIEW A VOLUME 60, NUMBER 1 JULY 1999 Quantum interference by two temporally distinguishable pulses Yoon-Ho Kim, Maria V. Chekhova,* Sergei P. Kulik,* and Yanhua Shih Department of Physics, University of Maryland, Baltimore County, Baltimore, Maryland 21250 Received 22 February 1999 We report a two-photon interference effect, in which the entangled photon pairs are generated from two laser pulses well separated in time. ... Feynman diagrams for the single pulse case. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/pR37_1.pdf -- 247.4 Кб -- 16.10.2004
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146. http://qi.phys.msu.ru/kulik/Papers/pR4209_1.pdf
... Polarization state of a biphoton: Quantum ternary logic A. V. Burlakov, M. V. Chekhova, O. A. Karabutova, D. N. Klyshko, and S. P. Kulik Department of Physics, Moscow State University, 119899 Moscow, Russia Received 21 July 1999 The polarization state of biphoton light generated via colinear frequency-degenerate spontaneous parametric down-conversion is considered. ... Polarized biphotons are suggested as ternary analogs of two-state quantum systems qubits . ... PRA 60 FIG. ... If both biphoton FIG....
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Ссылки http://qi.phys.msu.ru/kulik/Papers/pR4209_1.pdf -- 93.5 Кб -- 16.10.2004
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147. http://qi.phys.msu.ru/kulik/Papers/e051803.pdf
RAPID COMMUNICATIONS PHYSICAL REVIEW A, VOLUME 61, 051803 R First-order interference of nonclassical light emitted spontaneously at different times Yoon-Ho Kim,* Maria V. Chekhova, Sergei P. Kulik, Yanhua Shih, and ... Maryland, Baltimore County, Baltimore, Maryland 21250 Received 18 October 1999; published 14 April 2000 We study the first-order interference in spontaneous parametric down-conversion generated by two pump pulses that are well distinguishable in time ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/e051803.pdf -- 115.7 Кб -- 16.10.2004
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148. http://qi.phys.msu.ru/kulik/Papers/e011802.pdf
RAPID COMMUNICATIONS PHYSICAL REVIEW A, VOLUME 62, 011802 R High-intensity pulsed source of space-time and polarization double-entangled photon pairs Yoon-Ho Kim,* Sergei P. Kulik, and Yanhua Shih Department of Physics, University of Maryland, Baltimore County, Baltimore, Maryland 21250 Received 4 April 2000; published 13 June 2000 Two spatially separated type-I nonlinear ... Two orthogonally oriented type-I BBO crystals are placed collinearly and pumped by 45° polarized femtosecond pulses. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/e011802.pdf -- 173.5 Кб -- 16.10.2004
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149. http://qi.phys.msu.ru/kulik/Papers/multimode.pdf
... It is shown that biphotons can interfere if the time difference between their birth moments is a multiple, to an accuracy of the pump coherence time, of T 2 L / c , where L is the pump cavity length. ... It is important that, in this case, the interference pattern observed in coincidences has 100% visibility. ... One can show that the interference visibility depends on the path length difference L as V g (1) ( L ) , where g (1) ( z ) is the first-order spatial correlation function of the pump. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/multimode.pdf -- 107.2 Кб -- 16.10.2004
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150. http://qi.phys.msu.ru/kulik/Papers/Bell_interf.pdf
... First, we show how the inherent distinguishability in femtosecond-pulse-pumped type-II SPDC can be removed by using an interferometric technique without spectral and amplitude postselection. ... However, there is only limited amount of overlap due to the peculiar shape of the biphoton amplitudes in pulse-pumped type-II SPDC and this results in the reduction of the visibility of quantum interference. ... Note that only two biphoton amplitudes are involved in the quantum interference. ... FIG. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/Bell_interf.pdf -- 410.8 Кб -- 16.10.2004
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151. http://qi.phys.msu.ru/kulik/Papers/nondeg_Bell.pdf
... Unfortunately, femtosecond pulse pumped type-II SPDC shows poor quantum interference visibility due to the very different compared to the cw case behavior of the two-photon effective wave function 6 . ... The pump pulse is polarized at 45° . ... Phys. Rev. Lett. 84, 618 2000 claimed that one can recover high-visibility quantum interference in pulse pumped type-II SPDC from a thick crystal without spectral postselection by using narrow-band spectral fil- 10 11 12 13 14 15 16 17 ters . ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/nondeg_Bell.pdf -- 149.6 Кб -- 16.10.2004
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152. http://qi.phys.msu.ru/kulik/Papers/PRA10301.pdf
... An initially mixed polarization state from type-II spontaneous parametric down-conversion becomes entangled after the interferometric entanglement concentration. ... The first direct generation of an entangled two-qubit state involved photon pairs produced in the process of cw-pumped type-II spontaneous parametric down-conversion SPDC 4,5 . ... In this paper, we report the experimental demonstration of a general entanglement concentration scheme in a two-qubit state of type-II SPDC. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/PRA10301.pdf -- 316.0 Кб -- 09.10.2004
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153. http://qi.phys.msu.ru/kulik/Papers/PRL33601.pdf
Inter ference a nd I mag i ng Mi lena D'A ngelo ,1,* Yo on - Ho K i m , 1 2 2, Sergei P. Kuli k ,1, a nd Ya n hua Sh i h 1 Depa r t ment of Physics, Un iversit y of Ma r yla nd , Ba lt i more Count y, Ba lt i more , Ma r yla nd , 21250, USA Depa r t ment of Physics, Poha ng Un iversit y of Science a nd Te ch nolog y ( P OST ECH ) , Poha ng, 79 0 -784 , Korea ( Re ceive d 20 Aug ust ... T hese t wo i ne qua l it ies, t oget her, represent a noncla ssica l it y cond it ion. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/PRL33601.pdf -- 149.9 Кб -- 09.10.2004
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154. http://qi.phys.msu.ru/kulik/Papers/PRA42303.pdf
... Using the root approach of estimating quantum states, the initial two-photon state vector is reproduced from the measured fourth moments in the field. ... To measure the quantum state one needs to perform some projective measurements on the state and then to apply some computation procedure to the data. ... That is why the formalism applied to the unknown quantum states allowed us to formulate and experimentally check the fundamental statistical limits of the accuracy of state reconstruction. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/PRA42303.pdf -- 260.4 Кб -- 08.10.2004
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155. http://qi.phys.msu.ru/kulik/Papers/PRA32332.pdf
... The transformation is realized by rotating polarization for one of the photons of a polarization-entangled biphoton state (signal photon) by means of a Pockel cell triggered by the detection of the other (idler) photon after polarization selection. As a result, the state of the signal photon is losslessly changed from being completely unpolarized to being partially polarized, so that the final polarization degree is given by the idler detector quantum efficiency. ... J. Quantum Electron. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/PRA32332.pdf -- 169.2 Кб -- 01.10.2004
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156. NORMAN
... В значительной мере благодаря личному общению с Сергеем Павловичем я задумал, а весной этого года прочитал курс лекций "Основания и новости квантовой механики". Поэтому в заключении по диссертации, я думаю, надо добавить фразу, что материал диссертации уже включен в лекционные курсы, в частности, читаемые в Московском физико-техническом институте. ... Нильс Бор был весь в прошлом, он говорил о своих спорах с Альбертом (он так называл Эйнштейна). ...
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Ссылки http://qi.phys.msu.ru/kulik/Norman.htm -- 3.4 Кб -- 17.04.2004
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157. http://qi.phys.msu.ru/kulik/Papers/JETP_03_Rus.pdf
И ОММПИ НОИ К ДНМЕИ К ННП К ?К ОММП ? ... К? И З ДОЕ И ?И Й Р Р Ю Н Н И И Н О М М И К К И н И ДОЕ ОМК Р н ? ... И О НО д ДЕИ ДЕ ДЕИ ДЕ ДОЕИ ?? б б ? ... О Н О Н О П ДН Е н М П и ж Ъ НО П ДНПЕК К ?К ИКК М И ?К К И К ?К И Н гзД НО И К ДНМЕИ ОММП З гзД Г Г ? ... К ОН К? И И И К НМИ И ?Й И Д ЕИ ЩЯ Ш Ц С И НМ Й И К И И НО И К ДНМЕИ ОММП И К К И Й О К СД е Ъ Ъ О ПК Н НО К Ъ е Ъ И ДНЕИ Ъ Н Н Н И е Ъ гди гди К е Е И И И КК ХФ СЦЬ Ы Д Д ээ МОЙМОЙН И МПЙМОЙН Е э ОНООЙМНЕК И е гди д ДеН К гди Е К ? ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/JETP_03_Rus.pdf -- 406.4 Кб -- 13.01.2004
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158. http://qi.phys.msu.ru/kulik/Papers/JETP1_04KulikLO.pdf
... The object of investigation are 10ґ80-е-thick ultrathin gold films deposited on fused-silica substrates. ... It is shown that, under these conditions, the visibility of the interference pattern and the shape of the frequencyґangular spectrum at signal frequency are determined by the optical parameters of the medium at idler frequency, which belongs to the near-infrared region. ... According to (11), the visibility of the interference pattern depends on the transmission coefficient at idler frequency...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/JETP1_04KulikLO.pdf -- 157.2 Кб -- 25.12.2003
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159. http://qi.phys.msu.ru/kulik/Papers/JETP_Lett_03.pdf
... Statistical Reconstruction of the Quantum States of Three-Level Optical Systems Yu. ... The method of statistical estiequation and the analysis of the statistical propmethod of estimating quantum states, the initial measured fourth-order field moments. ... 6 2003 STATISTICAL RECONSTRUCTION OF THE QUANTUM STATES 355 The final state vector obtained by the reconstruction procedure, nevertheless, will be normalized to unity. ... 6 2003 STATISTICAL RECONSTRUCTION OF THE QUANTUM STATES 357 Conclusions. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/JETP_Lett_03.pdf -- 62.4 Кб -- 11.12.2003
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160. http://qi.phys.msu.ru/kulik/Papers/JETP10_03KrivitskiiLO.pdf
Journal of Experimental and Theoretical Physics, Vol. ... MISCELLANEOUS Biphotons as Three-Level Systems: Transformation and Measurement L. A. Krivitskioe, S. P. Kulik*, A. N. Penin, and M.V. Chekhova Moscow State University, Vorob'evy gory, Moscow, 119992 Russia *e-mail: skulik@qopt.phys.msu.su Received April 28, 2003 Abstract--Two algorithms for measuring the polarization state of the biphoton field prepared in the form of a three-level system (qutrit) are considered. ...
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Ссылки http://qi.phys.msu.ru/kulik/Papers/JETP10_03KrivitskiiLO.pdf -- 125.5 Кб -- 24.09.2003
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