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Observation of very long-lived entanglement 观察到很长时间的纠缠
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567480
T. Korber, C. Roos, W. Hansel, U. Rapol, M. Chwalla, J. Benhelm, D. Chek-al-kar, M. Riebe, H. Haffner, F. Schmidt-Kaler, R. Blatt
{"title":"Observation of very long-lived entanglement","authors":"T. Korber, C. Roos, W. Hansel, U. Rapol, M. Chwalla, J. Benhelm, D. Chek-al-kar, M. Riebe, H. Haffner, F. Schmidt-Kaler, R. Blatt","doi":"10.1109/EQEC.2005.1567480","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567480","url":null,"abstract":"We report on the preservation of bi-partite entanglement in an ion trap for over 10 seconds.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122509228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling of a novel optical 3R regenerator using a cascade of SOA based NOLM and double-stage wavelength converters 采用基于SOA的级联NOLM和双级波长转换器的新型光学3R再生器建模
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567184
G. Girault, F. Ginovart, V. Roncin, J. Simon
{"title":"Modeling of a novel optical 3R regenerator using a cascade of SOA based NOLM and double-stage wavelength converters","authors":"G. Girault, F. Ginovart, V. Roncin, J. Simon","doi":"10.1109/EQEC.2005.1567184","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567184","url":null,"abstract":"This paper theoretically studies a new 3R all-optical regenerator at 10 Gbit/s, showing how degraded data can be regenerated. Such a study could be useful in the device use in all-optical signal processing.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"204 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122512891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Coherent manipulation of atomic states in dipole potentials using micro-fabricated optical elements 利用微制造光学元件相干操纵偶极子势中的原子态
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567537
A. Lengwenus, M. Volk, W. Ertmer, G. Birkl
{"title":"Coherent manipulation of atomic states in dipole potentials using micro-fabricated optical elements","authors":"A. Lengwenus, M. Volk, W. Ertmer, G. Birkl","doi":"10.1109/EQEC.2005.1567537","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567537","url":null,"abstract":"Coherent Raman coupling is applied in parallel to ensembles of atoms in two-dimensional arrays of optical micro-potentials created by micro-fabricated lens arrays. For ultracold Rb atoms confined in these optical dipole potentials, the coherent coupling of the hyperfine ground states by stimulated Raman transitions is demonstrated. With Rabi and Ramsey techniques dephasing of the ensemble of atoms is investigated. Applying echo spectroscopy, coherence time of the evolution of the internal states is measured.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122513056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
One-way quantum key distribution system with active phase compensation 具有有源相位补偿的单向量子密钥分配系统
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567472
Z.L. Yuan, A. Shields
{"title":"One-way quantum key distribution system with active phase compensation","authors":"Z.L. Yuan, A. Shields","doi":"10.1109/EQEC.2005.1567472","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567472","url":null,"abstract":"We present a fully-automated one-way quantum key distribution system with active phase compensation. It gives a quantum bit error rate of 0.87% and a duty cycle of 99.6%.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122587917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Coherent control and geometrical phases for trapped ions 捕获离子的相干控制和几何相位
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567538
J. García-Ripoll, J. Cirac, P. Zoller
{"title":"Coherent control and geometrical phases for trapped ions","authors":"J. García-Ripoll, J. Cirac, P. Zoller","doi":"10.1109/EQEC.2005.1567538","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567538","url":null,"abstract":"In this work, a method to implement the pushing gate and the fast gates based on laser pulses is shown. An alternative and more general model of fast gate based on continuous off-resonant lasers is proposed. As further applications, a way to induce collective and nearest neighbor lasing interactions, and use them to produce squeezing, and generate cluster and GHz states of up to 30 atoms of the order of a period of the trap is demonstrated.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122829905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modification of confinement area for efficient electrons capture in MQW SCH MQW SCH中有效电子捕获约束区域的改进
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567204
I. M. Safonov, M. Klimenko, I. Sukhoivanov
{"title":"Modification of confinement area for efficient electrons capture in MQW SCH","authors":"I. M. Safonov, M. Klimenko, I. Sukhoivanov","doi":"10.1109/EQEC.2005.1567204","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567204","url":null,"abstract":"This paper proposes different ways of the capture efficiency increase without in-quantum-well-eigenstates spectrum perturbation based on the analysis which uses an original self-consistent methodology of the potential profile and eigenstates spectrum computing. The carrier capture efficiency for different structures and different optimization methods is computed. Finally, the laws of the semiconductor alloy composition are determined, which provide the lattice-matched separate confinement-area and required potential profiles.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131183603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Farfield dynamics of broad area vertical-cavity surface-emitting lasers: onset of partially coherent emission 大面积垂直腔面发射激光器的远场动力学:部分相干发射的开始
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567198
S. Mandre, Ingo Fischer, W. Elsasser, M. Peeter, G. Verschaffelt, J. Danckaert, H. Thienpont, M. Grabherr
{"title":"Farfield dynamics of broad area vertical-cavity surface-emitting lasers: onset of partially coherent emission","authors":"S. Mandre, Ingo Fischer, W. Elsasser, M. Peeter, G. Verschaffelt, J. Danckaert, H. Thienpont, M. Grabherr","doi":"10.1109/EQEC.2005.1567198","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567198","url":null,"abstract":"This study investigates a 50 mum-aperture broad-area vertical-cavity surface-emitting laser (BA-VCSEL) and studied its temporally and spatially resolved emission behaviour. For this, an intensified CCD-camera is employed with 300 ps shutter time, with which events of the BA-VCSEL's emission in quasi-cw operation is observed. The BA-VCSEL is pumped with 100 mus long current pulses with a repetition rate of 50 Hz. The farfield intensity distribution of the BA-VCSEL is measured. In addition, the nearfield intensity distribution is also measured by using an aspheric lens with an NA of 0.55 to image the nearfield onto the iCCD-camera","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131403681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electron-hole asymmetry and two-state lasing in quantum dot lasers 量子点激光器中的电子-空穴不对称性和双态激光
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567178
E. Viktorov, P. Mandel, Y. Tanguy, J. Houlihan, G. Huyet
{"title":"Electron-hole asymmetry and two-state lasing in quantum dot lasers","authors":"E. Viktorov, P. Mandel, Y. Tanguy, J. Houlihan, G. Huyet","doi":"10.1109/EQEC.2005.1567178","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567178","url":null,"abstract":"We study two-state quantum dot lasing and show that the asymmetry in the thermal population redistribution breaks the symmetric dynamical evolution of the electron-hole pairs. This fully explains the transition from two-state to single-state lasing observed experimentally.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131440766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Nondiffractive propagation of light in photonic crystals 光在光子晶体中的无衍射传播
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567497
K. Staliūnas, R. Herrero
{"title":"Nondiffractive propagation of light in photonic crystals","authors":"K. Staliūnas, R. Herrero","doi":"10.1109/EQEC.2005.1567497","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567497","url":null,"abstract":"It is shown in this letter that photonic crystals can modify the diffraction of the light in that the diffraction can vanish in propagation through particularly prepared photonic crystals. An analytical study of the propagation of the plane waves is performed, by expanding the electromagnetic field into a set of spatially harmonic (Bloch) modes. The nondiffractive propagation is checked by a direct numerical integration of wave equation.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133248621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Optimal conditions for large optical nonlinearity of cavity systems 大光学非线性腔系统的最优条件
EQEC '05. European Quantum Electronics Conference, 2005. Pub Date : 2005-06-12 DOI: 10.1109/EQEC.2005.1567530
H. Ajiki
{"title":"Optimal conditions for large optical nonlinearity of cavity systems","authors":"H. Ajiki","doi":"10.1109/EQEC.2005.1567530","DOIUrl":"https://doi.org/10.1109/EQEC.2005.1567530","url":null,"abstract":"Enhancement of the third-order nonlinearity of a two-level system embedded in a cavity has been calculated on the basis of the cavity QED. Analytic optimal conditions to achieve large nonlinearity has been obtained.","PeriodicalId":179542,"journal":{"name":"EQEC '05. European Quantum Electronics Conference, 2005.","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133678883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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