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Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)最新文献

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Quantum tomography of arbitrary spin states of particles: root approach 粒子任意自旋态的量子层析成像:根方法
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2006-05-24 DOI: 10.1117/12.683109
Y. Bogdanov
{"title":"Quantum tomography of arbitrary spin states of particles: root approach","authors":"Y. Bogdanov","doi":"10.1117/12.683109","DOIUrl":"https://doi.org/10.1117/12.683109","url":null,"abstract":"A method of quantum tomography of arbitrary spin particle states is developed on the basis of the root approach. It is shown that the set of mutually complementary distributions of angular momentum projections can be naturally described by a set of basis functions based on the Kravchuk polynomials. The set of Kravchuk basis functions leads to a multiparametric statistical distribution that generalizes the binomial distribution. In order to analyze a statistical inverse problem of quantum mechanics, we investigated the likelihood equation and the statistical properties of the obtained estimates. The conclusions of the analytical researches are approved by the results of numerical calculations.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76463240","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
Analysis of entanglement in quantum systems with continuous variables by means of Schmidt decomposition 用施密特分解分析连续变量量子系统中的纠缠
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2006-05-24 DOI: 10.1117/12.683105
A. Bogdanov, Y. Bogdanov, K. Valiev
{"title":"Analysis of entanglement in quantum systems with continuous variables by means of Schmidt decomposition","authors":"A. Bogdanov, Y. Bogdanov, K. Valiev","doi":"10.1117/12.683105","DOIUrl":"https://doi.org/10.1117/12.683105","url":null,"abstract":"We investigate the procedure of Schmidt modes extraction in systems with continuous variables. An algorithm based on singular value matrix decomposition is applied to the study of entanglement in an \"atom-photon\" system with spontaneous radiation. Also, this algorithm is applied to the study of a bi-photon system with spontaneous parametric down conversion with type-II phase matching for broadband pump. We demonstrate that dynamic properties of entangled states in an atom-photon system with spontaneous radiation are defined by a parameter equal to the product of the fine structure constant and the atom-electron mass ratio. We then consider the evolution of the system during radiation and show that the atomic and photonic degrees of freedom are entangling for the times of the same order of magnitude as the excited state life-time. Then the degrees of freedom are de-entangling and asymptotically approach to the level of small residual entanglement that is caused by momentum dispersion of the initial atomic packet. Finally, we investigate the process of coherence loss between modes in type-II parametric down conversion that is caused by non-linear crystal properties.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78248487","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
Description of quantum entanglement with nilpotent polynomials: extensive characterization of entanglement and canonical forms 幂零多项式量子纠缠的描述:纠缠和规范形式的广泛表征
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2006-05-24 DOI: 10.1117/12.683104
A. Mandilara, V. Akulin, A. Smilga, L. Viola
{"title":"Description of quantum entanglement with nilpotent polynomials: extensive characterization of entanglement and canonical forms","authors":"A. Mandilara, V. Akulin, A. Smilga, L. Viola","doi":"10.1117/12.683104","DOIUrl":"https://doi.org/10.1117/12.683104","url":null,"abstract":"We propose a general method for introducing extensive characteristics of quantum entanglement. The method relies on polynomials of nilpotent raising operators, that create entangled states acting on a reference vacuum state. By introducing the notion of tanglemeter (the logarithm of the state vector represented in a special canonical form and expressed via polynomials of nilpotent variables), we show how this description provides a simple criterion for entanglement as well as a universal method for constructing the invariants characterizing entanglement.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78494811","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: 3
Non-stationary entanglement and squeezing beyond the standard limits 非静止纠缠和超出标准极限的挤压
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2006-05-24 DOI: 10.1117/12.683118
H. Adamyan, G. Kryuchkyan
{"title":"Non-stationary entanglement and squeezing beyond the standard limits","authors":"H. Adamyan, G. Kryuchkyan","doi":"10.1117/12.683118","DOIUrl":"https://doi.org/10.1117/12.683118","url":null,"abstract":"We investigate time-modulation of continuous variable (CV) quantum states of light fields in application to time-resolved quantum communications. As realizations, we consider EPR entangled states of light as well as correlated twin beams generated in nondegenerate optical parametric oscillator (NOPO) subjected by a sequence of laser pulses. We demonstrate that time-modulation of a pump field essentially improves the degrees of both cv entanglement and intensity quantum correlation in NOPO doing them beyond the standard limits.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80585270","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
Algorithmic approach to quantum theory 1: features of many particle quantum dynamics 量子理论的算法方法1:许多粒子量子动力学的特征
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2006-05-24 DOI: 10.1117/12.683114
Y. Ozhigov, I. Semenihin
{"title":"Algorithmic approach to quantum theory 1: features of many particle quantum dynamics","authors":"Y. Ozhigov, I. Semenihin","doi":"10.1117/12.683114","DOIUrl":"https://doi.org/10.1117/12.683114","url":null,"abstract":"Algorithmic approach to quantum theory is considered. It is based on the supposition that every evolution of many particle system can be simulated by classical algorithms of polynomial complexity. This hypothesis agrees with all known experiments but it presumes the principle cut-off of quantum formalism because it excludes a scalable quantum computer. Algorithmic approach describes quantum evolution uniformly, without separation of measurements from the unitary dynamics; it is shown how Bohrn rule for quantum probability follows from the basic principles of this approach. The radical difference of algorithmic approach from the standard and its perspectives are discussed.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81155055","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
Structure of the semiempirical relaxation operator in quantum Liuville equation at simulation ESR spectra of Zn-P two-spin system in Si Si中Zn-P双自旋体系ESR谱模拟中量子Liuville方程半经验弛豫算子的结构
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2006-05-24 DOI: 10.1117/12.683124
S. Dobryakov, V. Privezentsev
{"title":"Structure of the semiempirical relaxation operator in quantum Liuville equation at simulation ESR spectra of Zn-P two-spin system in Si","authors":"S. Dobryakov, V. Privezentsev","doi":"10.1117/12.683124","DOIUrl":"https://doi.org/10.1117/12.683124","url":null,"abstract":"In this paper we prepose to enter the semiempirical relaxation operator (four-index relaxation matrix Rmjkn) in Liuville quantum equation at simulation ESR spectra of Zn-P two-spin system in a Si. Introduction of this operator allows us to expand application of Liuville equation to nonequilibrium processes. Particularly it was made to processes of absorption by Zn-P two-spin system of the superfluous micrometer-wave quantums at presence of its interaction with Si environment. The semiempirical relaxation operator Rmjkn = vmjPkn + Pmjvkn contains of transitions requencies Vmn and functions overlap Pmn in spin system. Imaginary frequencies of transition ±Hmn are replaced on real Vmn, and discrete δ-function δmn - on overlap function Pmn as result of stochastic interaction paramagnetic Zn-P systems with Si environment and an absorbed μ-wave quantums.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76468209","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
Dialogue model of quantum dynamics 量子动力学的对话模型
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2006-05-24 DOI: 10.1117/12.683120
P. Kurakin, G. Malinetskii, H. Bloom
{"title":"Dialogue model of quantum dynamics","authors":"P. Kurakin, G. Malinetskii, H. Bloom","doi":"10.1117/12.683120","DOIUrl":"https://doi.org/10.1117/12.683120","url":null,"abstract":"We introduce an original model of quantum phenomena, a model that provides a picture of a \"deep structure\", an \"underlying pattern\" of quantum dynamics. We propose that the source of a particle and all of that particle's possible detectors \"talk\" before the particle is finally observed by just one detector. These talks do not take place in physical time. They occur in what we call \"hidden time\". Talks are spatially organized in such a way that the model reproduces standard quantum probability amplitudes. This is most obviously seen if one uses R. Feynman's formulation of quantum theory. We prefer the \"physical level\" of mathematical strictness in describing our model.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82824618","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
Copying of quantum information by means of a quantum amplifier 用量子放大器复制量子信息
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2006-04-07 DOI: 10.1117/12.683122
D. Sych, B. Grishanin, V. Zadkov
{"title":"Copying of quantum information by means of a quantum amplifier","authors":"D. Sych, B. Grishanin, V. Zadkov","doi":"10.1117/12.683122","DOIUrl":"https://doi.org/10.1117/12.683122","url":null,"abstract":"Information aspects of copying quantum states via stimulated emission of an optical quantum amplifier are considered. It is shown that the measurable information very rapidly decreases after amplification of a single photon up to a level of several photons. Spontaneous emission, which leads to such behavior, is also discussed.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2006-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83564423","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
An algorithm for constructing polynomial systems whose solution space characterizes quantum circuits 一种构造多项式系统的算法，其解空间具有量子电路的特征
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2005-12-08 DOI: 10.1117/12.683121
V. Gerdt, V. Severyanov
{"title":"An algorithm for constructing polynomial systems whose solution space characterizes quantum circuits","authors":"V. Gerdt, V. Severyanov","doi":"10.1117/12.683121","DOIUrl":"https://doi.org/10.1117/12.683121","url":null,"abstract":"An algorithm and its first implementation in C# are presented for assembling arbitrary quantum circuits on the base of Hadamard and Toffoli gates and for constructing multivariate polynomial systems over the finite field Z2 arising when applying the Feynman's sum-over-paths approach to quantum circuits. The matrix elements determined by a circuit can be computed by counting the number of common roots in Z2 for the polynomial system associated with the circuit. To determine the number of solutions in Z2 for the output polynomial system, one can use the Grobner bases method and the relevant algorithms for computing Grobner bases.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2005-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80122879","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
Fast quantum computing with buckyballs 快速量子计算与巴基球
Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan) Pub Date : 2005-07-18 DOI: 10.1117/12.683125
M. S. Garelli, F. Kusmartsev
{"title":"Fast quantum computing with buckyballs","authors":"M. S. Garelli, F. Kusmartsev","doi":"10.1117/12.683125","DOIUrl":"https://doi.org/10.1117/12.683125","url":null,"abstract":"We have found that encapsulated atoms in fullerene molecules, which carry a spin, can be used for fast quantum computing. We describe the scheme for performing quantum computations, going through the preparation of the qubit state and the realization of a two-qubit quantum gate. When we apply a static magnetic field to each encased spin, we find out the ideal design for the preparation of the quantum state. Therefore, adding to our system a time dependent magnetic field, we can perform a phase-gate. The operational time related to a π-phase gate is of the order of ns. This finding shows that, during the decoherence time, which is proportional to micrometer/s, we can perform many thousands of gate operations. In addition, the two-qubit state which arises after a π-gate is characterized by a high degree of entanglement. This opens a new avenue for the implementation of fast quantum computation.","PeriodicalId":90714,"journal":{"name":"Quantum bio-informatics V : proceedings of the quantum bio-informatics 2011, Tokyo University of Science, Japan, 7-12 March 2011. Quantum Bio-Informatics (Conference) (5th : 2011 : Tokyo, Japan)","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2005-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87300258","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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