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Acta Physica Hungarica B) Quantum Electronics最新文献

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Probability representation and new entropic uncertainty relations for symplectic and optical tomograms 辛层析和光学层析的概率表示和新的熵不确定性关系
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.10
M. Man'ko, V. Man'ko, S. Nicola, R. Fedele
{"title":"Probability representation and new entropic uncertainty relations for symplectic and optical tomograms","authors":"M. Man'ko, V. Man'ko, S. Nicola, R. Fedele","doi":"10.1556/APH.26.2006.1-2.10","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.10","url":null,"abstract":"Entropic uncertainty relations for Shannon entropies associated with tomographic probability distributions of continuous quadratures are reviewed. New entropie uncertainty relations in the form of inequalities for integrals containing the tomograms of quantum states and deformation parameter are obtained.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"116 14","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120851636","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: 21
Reduction of the density matrix and generalized bell inequalities 密度矩阵的约简与广义贝尔不等式
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.25
V. Andreev
{"title":"Reduction of the density matrix and generalized bell inequalities","authors":"V. Andreev","doi":"10.1556/APH.26.2006.1-2.25","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.25","url":null,"abstract":"The Bell-Clauser-Horne-Shimony-Holt inequalities are considered. The right-hand side of these inequalities does not depend on the form of any two-particle spin state. In the case of the generalized Bell-Clauser-Horne-Shimony-Holt inequalities the right-hand sides depend on the form of the concrete two-particle state. The left-hand sides of these inequalities depend on four arbitrary vectors defined in three-dimensional space. They define the directions on which the spins of particles forming a correlated pair are projected. Our aim is to find such vectors that the left-hand side of the inequality should take its maximum value. In other words, by these vectors the inequality transforms into an equality. It is shown that it can be done with the help of a special reduction of the density matrix of the two-state spin state.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116244835","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
Tripartite entanglement in coupled three-wave interactions 耦合三波相互作用中的三方纠缠
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.9
A. Chirkin, M. Saigin
{"title":"Tripartite entanglement in coupled three-wave interactions","authors":"A. Chirkin, M. Saigin","doi":"10.1556/APH.26.2006.1-2.9","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.9","url":null,"abstract":"We study the three-mode entanglement properties in a new kind of the coupled nonlinear optical interactions consisting of two parametric down-conversion processes and one up-conversion. Approach, based on partial scaling transformation of the covariant matrix, is used to reveal tripartite entanglement. It is established that the three-mode field is in the true entangled state.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131903192","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: 10
Emergence of an interference pattern in numerical simulation for quantum particles 量子粒子数值模拟中干涉图样的出现
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.26
M. Božić, D. Arsenovic
{"title":"Emergence of an interference pattern in numerical simulation for quantum particles","authors":"M. Božić, D. Arsenovic","doi":"10.1556/APH.26.2006.1-2.26","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.26","url":null,"abstract":"The emergence of quantum mechanical probability distribution, by simulating single particle arrivals to a screen behind a grating, is shown in this paper for various parameters of a particle and a grating. This approach, based on particle’s trajectories and transverse momentum distribution, is suitable for a study how particle’s size influences an interference pattern.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"2 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120844452","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: 4
Chaotic walking of atoms in an optical lattice 原子在光学晶格中的混沌行走
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.14
V. Argonov, S. Prants
{"title":"Chaotic walking of atoms in an optical lattice","authors":"V. Argonov, S. Prants","doi":"10.1556/APH.26.2006.1-2.14","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.14","url":null,"abstract":"We treat nonlinear dynamics of two-level atoms in an optical lattice taking into account photon recoil effect caused by spontaneous emission that is considered as random events to be incorporated in the equations of motion by a Monte Carlo method. The light-induced mechanical effects — acceleration, deceleration and velocity grouping of atoms — are simulated with the equations of motion. A new effect of chaotic walking of atoms in an optical lattice is found and shown to have anomalous statistical properties.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114305049","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: 2
Spectroscopy of cold, trapped atoms 捕获冷原子的光谱学
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.13
T. Brzozowski, M. Brzozowska, J. Zachorowski, W. Gawlik
{"title":"Spectroscopy of cold, trapped atoms","authors":"T. Brzozowski, M. Brzozowska, J. Zachorowski, W. Gawlik","doi":"10.1556/APH.26.2006.1-2.13","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.13","url":null,"abstract":"We describe the results of the pump-probe spectroscopy performed with 85Rb atoms trapped in a magneto-optical trap (MOT). We show how various processes associated with light-atom interactions shape the observed spectra and how their features can be utilized for obtaining information about properties of cold-atom sample. In particular, we emphasize the important role of the atomic-recoil phenomenon and use it for efficient and reliable velocimetry of the working MOT.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"138 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126990854","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
Non-cyclic geometric phases in mixed state neutron polarimetry 混合态中子偏振法中的非循环几何相
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.19
S. Sponar, J. Klepp, Y. Hasegawa, E. Jericha, G. Badurek
{"title":"Non-cyclic geometric phases in mixed state neutron polarimetry","authors":"S. Sponar, J. Klepp, Y. Hasegawa, E. Jericha, G. Badurek","doi":"10.1556/APH.26.2006.1-2.19","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.19","url":null,"abstract":"We have measured the non-cyclic geometric phase acquired during a unitary SU(2) evolution of a neutron spinor wave function for the mixed state case. The data is in good agreement with theory, verifying the predicted values for the mixed state geometric phase.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133641850","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
Collective cooling of atoms in a ring cavity 环形腔中原子的集体冷却
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.16
D. Nagy, J. Asbóth, P. Domokos
{"title":"Collective cooling of atoms in a ring cavity","authors":"D. Nagy, J. Asbóth, P. Domokos","doi":"10.1556/APH.26.2006.1-2.16","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.16","url":null,"abstract":"We study the cooling effect induced by a transversely pumped ring cavity on the motion of N linearly polarizable particles, all of which are trapped in the same cavity. We derive the friction tensor including cross friction terms and compare it to the friction coefficient of single-atom cavity cooling. We find that atoms that are not trapped by the cavity field are cooled independently with the same efficiency as a single untrapped atom. For atoms self-trapped in the cavity field, however, collective effects kick in. These result in an N-fold increase of the friction on the center-of-mass mode, however, all other modes of motion are practically not cooled by the cavity. This shows that cavity cooling works efficiently for many particles cooled collectively, and allows us to reach the regime where the particles are deeply trapped in harmonic wells. There it has to be complemented by other cooling methods, e.g. sideband cooling.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124755886","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: 5
Cold beams of biomolecules for quantum optics 用于量子光学的生物分子冷束
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.12
M. Marksteiner, G. Kiesewetter, L. Hackermüller, H. Ulbricht, M. Arndt
{"title":"Cold beams of biomolecules for quantum optics","authors":"M. Marksteiner, G. Kiesewetter, L. Hackermüller, H. Ulbricht, M. Arndt","doi":"10.1556/APH.26.2006.1-2.12","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.12","url":null,"abstract":"We study laser desorption into an adiabatically expanding atom beam as a promising technique to volatilize an ensemble of cold biomolecules. Samples under investigation are the amino acid Tryptophan and the polypeptide Gramicidin. We discuss the possibilities of such beams for applications with respect to matter wave interferometry.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122358725","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: 5
Trapping states of a trapped ion, revisited 被困离子的俘获态，重访
Acta Physica Hungarica B) Quantum Electronics Pub Date : 2006-11-01 DOI: 10.1556/APH.26.2006.1-2.15
P. Toschek, S. Wallentowitz
{"title":"Trapping states of a trapped ion, revisited","authors":"P. Toschek, S. Wallentowitz","doi":"10.1556/APH.26.2006.1-2.15","DOIUrl":"https://doi.org/10.1556/APH.26.2006.1-2.15","url":null,"abstract":"The vibration of ions in the potential well of an ion trap has served for the first demonstration of laser cooling and is an essential ingredient of concepts for quantum information processing. The ion motion couples to a driven internal ion resonance such that the system obeys a Jaynes-Cummings (J-C) model that predicts coherently generated “trapping states” of the oscillatory excitation known from micro-maser dynamics. In the past, metastable states of the vibrational excitation of an individual trapped Ba ion had been observed. They were tentatively identified with the trapping states of the J-C model. Recently, an extension of this model including the spatial distribution of the light field has been shown to give rise to another type of trapping states that are robust under decoherence. The characteristics of these novel trapping states better represent the previously observed metastable vibronic states.","PeriodicalId":150867,"journal":{"name":"Acta Physica Hungarica B) Quantum Electronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131008301","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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