Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046020097900
P. A. Badoz, A. Briggs, E. Rosencher, F. d'Avitaya
The first results on the superconducting properties of ultra-thin epitaxial CoSi 2 films are reported. The metal films are obtained by solid phase epitaxy under ultra high-vacuum conditions, with thicknesses ranging from 600 A down to 50 A. These films are stable against temperature cycling from 350 mK up to room temperature and superconducting for thicknesses down to 100 A. Results showing a reduction of the transition temperature and variations of the critical magnetic field with decreasing film thicknesses are presented. Furthermore, for very low film thicknesses (i.e. 100 A), an intermediate plateau is observed in the resistivity versus temperature curve. The physical origin of these phenomena is briefly discussed Preparation de couches minces de 50 a 600 A d'epaisseur, stables lors de cycles thermiques de 350 mK jusqu'a la temperature ambiante et supraconducteurs pour des epaisseurs superieures a 100 A. Diminution de la temperature critique et variations du champ magnetique critique quand l'epaisseur diminue. Observation d'un plateau dans la courbe de resistivite en fonction de la temperature pour la couche de 100 A
{"title":"Superconductivity in ultra-thin CoSi2 epitaxial films","authors":"P. A. Badoz, A. Briggs, E. Rosencher, F. d'Avitaya","doi":"10.1051/JPHYSLET:019850046020097900","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046020097900","url":null,"abstract":"The first results on the superconducting properties of ultra-thin epitaxial CoSi 2 films are reported. The metal films are obtained by solid phase epitaxy under ultra high-vacuum conditions, with thicknesses ranging from 600 A down to 50 A. These films are stable against temperature cycling from 350 mK up to room temperature and superconducting for thicknesses down to 100 A. Results showing a reduction of the transition temperature and variations of the critical magnetic field with decreasing film thicknesses are presented. Furthermore, for very low film thicknesses (i.e. 100 A), an intermediate plateau is observed in the resistivity versus temperature curve. The physical origin of these phenomena is briefly discussed Preparation de couches minces de 50 a 600 A d'epaisseur, stables lors de cycles thermiques de 350 mK jusqu'a la temperature ambiante et supraconducteurs pour des epaisseurs superieures a 100 A. Diminution de la temperature critique et variations du champ magnetique critique quand l'epaisseur diminue. Observation d'un plateau dans la courbe de resistivite en fonction de la temperature pour la couche de 100 A","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"14 1","pages":"979-983"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84979245","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046019090100
F. Argoul, A. Arneodo
The effects of a periodic excitation on the transition to chaos via intermittency are considered. A renormalization group approach is used to predict the scaling behaviour of the average length of laminarity with respect to the amplitude of the forcing. The corresponding critical exponents are calculated for the different «universality classes» and found to be independent of the value of the external frequency. Numerical results on discrete systems are reported which corroborate these theoretical results On discute de l'effet d'une excitation periodique sur un systeme qui transite vers le chaos par intermittence (de type I). On montre que l'amplitude de l'excitation joue le role d'une variable d'echelle et que la longueur moyenne des phases laminaires presente des proprietes d'universalite au voisinage de la transition. A l'aide des techniques du groupe de renormalisation, on calcule les exposants critiques correspondant aux differentes classes d'universalite et on insiste sur le fait qu'ils ne dependent pas de la frequence d'entrainement. On presente les resultats d'experimentation numerique sur des systemes discrets qui viennent corroborer ces predictions theoriques
考虑了周期性激励对由间歇向混沌过渡的影响。采用一种重整化群方法来预测层流平均长度相对于强迫振幅的标度行为。对不同的“普适性类别”计算了相应的临界指数，并发现它们与外部频率的值无关。本文报道了离散系统的数值结果，证实了这些理论结果。关于离散系统的非线性效应、周期效应、过渡效应和混沌间歇性(I型)，关于非线性振幅、激发态、变量、梯级效应和长周期效应，层叠系统给出了过渡效应的普遍特性。A 'aide des techniques du group de rennormation, on calcalle exants critications对应于不同的类d'universalite, on坚持不确定的事实，并依赖于频率和夹带。目前，实验数值计算的结果较少，系统离散性较好，可用于预测理论
{"title":"SCALING FOR A PERIODIC FORCING AT THE ONSET OF INTERMITTENCY","authors":"F. Argoul, A. Arneodo","doi":"10.1051/JPHYSLET:019850046019090100","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046019090100","url":null,"abstract":"The effects of a periodic excitation on the transition to chaos via intermittency are considered. A renormalization group approach is used to predict the scaling behaviour of the average length of laminarity with respect to the amplitude of the forcing. The corresponding critical exponents are calculated for the different «universality classes» and found to be independent of the value of the external frequency. Numerical results on discrete systems are reported which corroborate these theoretical results On discute de l'effet d'une excitation periodique sur un systeme qui transite vers le chaos par intermittence (de type I). On montre que l'amplitude de l'excitation joue le role d'une variable d'echelle et que la longueur moyenne des phases laminaires presente des proprietes d'universalite au voisinage de la transition. A l'aide des techniques du groupe de renormalisation, on calcule les exposants critiques correspondant aux differentes classes d'universalite et on insiste sur le fait qu'ils ne dependent pas de la frequence d'entrainement. On presente les resultats d'experimentation numerique sur des systemes discrets qui viennent corroborer ces predictions theoriques","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"36 1","pages":"901-907"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80723475","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046019092900
D. Ausserré, H. Hervet, F. Rondelez
We propose a simple model for the concentration profile induced by a non-adsorbing solid wall in dilute solutions of semi-flexible chains. Our approach is based on the assumption that the restriction in the chain local curvature of the chain creates a non-zero surface concentration. The monomer concentration profile ΦSF(Z) is deduced from the mean-field model for flexible chains, ΦF(Z) = Φb tanh 2(Z/RG2), by introducing an extrapolation distance D proportional to the persistence length q. We show that ΦSF(Z) = Φ b tanh2[(Z + D)/RG2] where RG is the chain radius of gyration and Φb is the bulk polymer concentration. This analytical expression provides a very good fit with recent experimental data obtained by the evanescent wave induced fluorescence method (EWIF) in aqueous xanthan solutions.
{"title":"Depletion layers in polymer solutions : influence of the chain persistence length","authors":"D. Ausserré, H. Hervet, F. Rondelez","doi":"10.1051/JPHYSLET:019850046019092900","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046019092900","url":null,"abstract":"We propose a simple model for the concentration profile induced by a non-adsorbing solid wall in dilute solutions of semi-flexible chains. Our approach is based on the assumption that the restriction in the chain local curvature of the chain creates a non-zero surface concentration. The monomer concentration profile ΦSF(Z) is deduced from the mean-field model for flexible chains, ΦF(Z) = Φb tanh 2(Z/RG2), by introducing an extrapolation distance D proportional to the persistence length q. We show that ΦSF(Z) = Φ b tanh2[(Z + D)/RG2] where RG is the chain radius of gyration and Φb is the bulk polymer concentration. This analytical expression provides a very good fit with recent experimental data obtained by the evanescent wave induced fluorescence method (EWIF) in aqueous xanthan solutions.","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"127 3 1","pages":"929-934"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79578752","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046020095300
R. Zana, C. Weill
L'effet de la temperature sur les proprietes micellaires de tensioactifs non ioniques a ete etudie par declin de fluorescence (formation d'excimere intramicellaire) du pyrene solubilise dans les micelles. Pour les surfactants du type C 12 H 25 E n (E=groupe oxyde d'ethylene; n=6, 8, 9) le nombre micellaire moyen en nombre N est pratiquement independant de la temperature T quand T
研究了温度对非离子表面活性剂胶束性能的影响，通过荧光衰减(形成胶束内外激子)研究了芘在胶束中的溶解。C型表面活性剂12h 25 E n (E=氧化乙烯基团);当T
{"title":"Effect of temperature on the aggregation behaviour of nonionic surfactants in aqueous solutions","authors":"R. Zana, C. Weill","doi":"10.1051/JPHYSLET:019850046020095300","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046020095300","url":null,"abstract":"L'effet de la temperature sur les proprietes micellaires de tensioactifs non ioniques a ete etudie par declin de fluorescence (formation d'excimere intramicellaire) du pyrene solubilise dans les micelles. Pour les surfactants du type C 12 H 25 E n (E=groupe oxyde d'ethylene; n=6, 8, 9) le nombre micellaire moyen en nombre N est pratiquement independant de la temperature T quand T<T c -35 (T c =temperature critique du systeme). Dans le domaine T c -35<T<T c , N augmente avec T, jusqu'a T c . Dans le meme domaine on note l'existence d'une migration intermicellaire du pyrene. La vitesse de cette migration augmente tres rapidement avec T. Ce processus semble se produire par l'intermediaire de collisions entre micelles accompagnees d'une fusion temporaire et partielle des micelles. Un autre surfactant non ionique etudie, le Triton X-100, se comporte de facon un peu differente: N augmente avec T et le processus de migration existe dans tout le domaine de temperature etudie","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"60 1","pages":"953-960"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83179820","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046020094500
R. Rammal, J. A. d'Auriac, B. Douçot
Using the notion of the subdominant ultrametric, the degree of ultrametricity of a given metric space (e.g. phase space) is introduced. A simple and efficient method for the calculation of is outlined. is shown to provide a simple quantitative measure of the deviation from exact ultrametricity. Explicit examples are used to illustrate this notion which is argued to be of some interest in statistical-mechanical models and combinatorial optimization problems La notion de degre d'ultrametricite d'un espace metrique donne est introduite a partir de l'ultrametrique sous-dominante. On decrit une procedure simple et efficace pour le calcul de . On montre que fournit une mesure quantitative simple de la deviation par rapport a l'ultrametricite exacte. Cette notion est illustree pour des exemples explicites et nous suggerons son interet dans les modeles de mecanique statistique ainsi que les problemes d'optimisation combinatoire
{"title":"On the degree of ultrametricity","authors":"R. Rammal, J. A. d'Auriac, B. Douçot","doi":"10.1051/JPHYSLET:019850046020094500","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046020094500","url":null,"abstract":"Using the notion of the subdominant ultrametric, the degree of ultrametricity of a given metric space (e.g. phase space) is introduced. A simple and efficient method for the calculation of is outlined. is shown to provide a simple quantitative measure of the deviation from exact ultrametricity. Explicit examples are used to illustrate this notion which is argued to be of some interest in statistical-mechanical models and combinatorial optimization problems La notion de degre d'ultrametricite d'un espace metrique donne est introduite a partir de l'ultrametrique sous-dominante. On decrit une procedure simple et efficace pour le calcul de . On montre que fournit une mesure quantitative simple de la deviation par rapport a l'ultrametricite exacte. Cette notion est illustree pour des exemples explicites et nous suggerons son interet dans les modeles de mecanique statistique ainsi que les problemes d'optimisation combinatoire","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"36 1","pages":"945-952"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81476079","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046020096700
A. Robledo, C. Varea, E. Martina
Transition de rugosite de l'interphase dans un melange modele constitue de copolymeres bisequences amphiphiles de deux solvants non miscibles et d'un cosurfactant monomerique
由两种非混溶溶剂和一种单体共表面活性剂的双序列双共聚物组成的模型混合物中界面粗糙度的转变
{"title":"Roughening transition and formation of bicontinuous structures of immiscible solvents embedded in surfactant diblock copolymers","authors":"A. Robledo, C. Varea, E. Martina","doi":"10.1051/JPHYSLET:019850046020096700","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046020096700","url":null,"abstract":"Transition de rugosite de l'interphase dans un melange modele constitue de copolymeres bisequences amphiphiles de deux solvants non miscibles et d'un cosurfactant monomerique","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"4 1","pages":"967-972"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75235772","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046020096100
H. Fink, A. López
From the nonlinear Ginzburg-Landau equations exact maximum supercurrent densities of injected transport currents were calculated for a square microarray as a function of lattice parameter. In the limit that the lattice parameter becomes small in comparison to the temperature dependent coherence length, values of the maximum current were also obtained for honeycomb and rectangular arrays. The honeycomb array has anisotropic critical current densities with 3-fold symmetry in the plane of the array Determination des densites critiques de courant superconducteur a partir des equations de Ginzburg-Landau non lineaires pour des courants de transport injectes dans un reseau carre, en fonction de la periode du reseau. Valeurs maximales du courant pour les reseaux rectangulaires et hexagonaux lorsque la periode du reseau devient petite devant la longueur de coherence supraconductrice
{"title":"Critical transport currents of superconducting microarrays","authors":"H. Fink, A. López","doi":"10.1051/JPHYSLET:019850046020096100","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046020096100","url":null,"abstract":"From the nonlinear Ginzburg-Landau equations exact maximum supercurrent densities of injected transport currents were calculated for a square microarray as a function of lattice parameter. In the limit that the lattice parameter becomes small in comparison to the temperature dependent coherence length, values of the maximum current were also obtained for honeycomb and rectangular arrays. The honeycomb array has anisotropic critical current densities with 3-fold symmetry in the plane of the array Determination des densites critiques de courant superconducteur a partir des equations de Ginzburg-Landau non lineaires pour des courants de transport injectes dans un reseau carre, en fonction de la periode du reseau. Valeurs maximales du courant pour les reseaux rectangulaires et hexagonaux lorsque la periode du reseau devient petite devant la longueur de coherence supraconductrice","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"3 1","pages":"961-965"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90103783","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046019092300
A. Benoit, J. Bossy, J. Flouquet, J. Schweizer
Magnetic diffraction in a bcc single crystal of 3 He directly proves the occurrence of an antiferromagnetic ordering with a propagation vector (1/2, 0, 0) Mise en evidence d'un ordre antiferromagnetique de vecteur de propagation (1/2,0,0) dans un cristal cubique centre de 3 He par diffraction de neutrons
磁衍射直接证明了具有传播矢量(1/2,0,0)的反铁磁有序性(Mise en evidence d'un order)的反铁磁有序性(1/2,0,0)的反铁磁有序性(Mise en evidence d'un order)和具有立方中心的反铁磁中子衍射
{"title":"Magnetic diffraction in solid 3He","authors":"A. Benoit, J. Bossy, J. Flouquet, J. Schweizer","doi":"10.1051/JPHYSLET:019850046019092300","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046019092300","url":null,"abstract":"Magnetic diffraction in a bcc single crystal of 3 He directly proves the occurrence of an antiferromagnetic ordering with a propagation vector (1/2, 0, 0) Mise en evidence d'un ordre antiferromagnetique de vecteur de propagation (1/2,0,0) dans un cristal cubique centre de 3 He par diffraction de neutrons","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"5 1","pages":"923-927"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75279183","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046019091500
M. Leleyter
A comparison is made between linear interstellar molecules HC x N observed only for odd x and C n H − ions obtained in SIMS experiments which are very much profuse for even n than for odd ones. These two kinds of clusters are isoelectronic if n=x+1. So the study of the C n H − ion properties with the Huckel method lets to get easily some results on HC x N molecules and to understand why only the odd ones are detected in interstellar clouds: the Fermi level of these clusters indeed falls into a band of degenerated π levels; so according to the carbon atom number parity, it is either full up to even n or odd x (great stability of the cluster) or half-filled in the other case (weaker stability of the corresponding cluster). C n H + ions and C n H molecules are considered too Comparaison des molecules interstellaires HC x N lineaires, observees seulement pour x impair, et les ions C n H − , obtenus par experiences SIMS et beaucoup plus abondants pour n pair que n impair. Calculs de Huckel pour les systemes isoelectroniques, lorsque n=x+1, sur C n H − et aussi sur HC x N, observe dans les nuages interstellaires avec x impair
对线性星际分子HC x N与SIMS实验中得到的HC N H离子进行了比较，其中偶数N比奇数N丰富得多。当n=x+1时，这两种簇是等电子的。因此，用Huckel方法研究C n H离子的性质，可以很容易地得到HC x n分子的一些结果，并理解为什么在星际云中只检测到奇怪的分子:这些星团的费米能级确实落在简并π能级的带中;因此，根据碳原子数宇称，它要么满到偶数n或奇数x(簇的稳定性很好)，要么半满(相应簇的稳定性较弱)。chnh +离子和chnh分子被认为是太过分子间的比较，观测到的是HC x n线性，观测到的是chnh -离子的沉淀，观测到的是chnh -离子的沉淀，观测到的是SIMS et beoup +丰度的沉淀，观测到的是SIMS et beoup +丰度的沉淀。计算Huckel倒les系统isoelectroniques,当n = x + 1,苏尔C n H−等也在HC x n,观察在nuages interstellaires用x损害
{"title":"Sur une similitude entre des agrégats obtenus en émission ionique secondaire et des molécules observées en astrophysique","authors":"M. Leleyter","doi":"10.1051/JPHYSLET:019850046019091500","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046019091500","url":null,"abstract":"A comparison is made between linear interstellar molecules HC x N observed only for odd x and C n H − ions obtained in SIMS experiments which are very much profuse for even n than for odd ones. These two kinds of clusters are isoelectronic if n=x+1. So the study of the C n H − ion properties with the Huckel method lets to get easily some results on HC x N molecules and to understand why only the odd ones are detected in interstellar clouds: the Fermi level of these clusters indeed falls into a band of degenerated π levels; so according to the carbon atom number parity, it is either full up to even n or odd x (great stability of the cluster) or half-filled in the other case (weaker stability of the corresponding cluster). C n H + ions and C n H molecules are considered too Comparaison des molecules interstellaires HC x N lineaires, observees seulement pour x impair, et les ions C n H − , obtenus par experiences SIMS et beaucoup plus abondants pour n pair que n impair. Calculs de Huckel pour les systemes isoelectroniques, lorsque n=x+1, sur C n H − et aussi sur HC x N, observe dans les nuages interstellaires avec x impair","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"10 1","pages":"915-922"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90636483","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}
Pub Date : 1985-10-01DOI: 10.1051/JPHYSLET:019850046019089300
R. Ettelaie, M. .. Moore
Determining the residual entropy in the simulated annealing approach to optimization is shown to provide useful information on the true ground state energy. The one-dimensional Ising spin glass is studied to exemplify the procedure and in this case the residual entropy is related to the number of one-spin flip stable metastable states. The residual entropy decreases to zero only logarithmically slowly with the inverse cooling rate On montre que la determination de l'entropie residuelle, dans la methode d'optimisation par recuit simule, fournit des informations utiles sur l'etat fondamental vrai. On etudie un verre d'Ising a 1 dimension. L'entropie residuelle est reliee au nombre d'etats metastables qui restent stables par retournement d'un seul spin. L'entropie residuelle ne decroit que logarithmiquement vers zero avec le taux inverse de refroidissement
在模拟退火优化方法中确定残余熵可以提供关于真实基态能量的有用信息。以一维伊辛自旋玻璃为例，残余熵与单自旋翻转稳定亚稳态的数目有关。剩余熵随逆冷却速率呈对数缓慢下降至零。在monte que la determination de l’entropie residuelle上，采用了一种基于优化模型的方法，采用了四种基于基本熵的信息实用程序。在一个一维空间里，我们的研究是正确的。L 'entropie residuelle est减轻非盟和政变的亚稳剩下的马厩par retournement d一个单独的自旋。熵残差与熵残差之间的对数关系为零，熵残差与熵残差之间的对数关系为零
{"title":"Residual entropy and simulated annealing","authors":"R. Ettelaie, M. .. Moore","doi":"10.1051/JPHYSLET:019850046019089300","DOIUrl":"https://doi.org/10.1051/JPHYSLET:019850046019089300","url":null,"abstract":"Determining the residual entropy in the simulated annealing approach to optimization is shown to provide useful information on the true ground state energy. The one-dimensional Ising spin glass is studied to exemplify the procedure and in this case the residual entropy is related to the number of one-spin flip stable metastable states. The residual entropy decreases to zero only logarithmically slowly with the inverse cooling rate On montre que la determination de l'entropie residuelle, dans la methode d'optimisation par recuit simule, fournit des informations utiles sur l'etat fondamental vrai. On etudie un verre d'Ising a 1 dimension. L'entropie residuelle est reliee au nombre d'etats metastables qui restent stables par retournement d'un seul spin. L'entropie residuelle ne decroit que logarithmiquement vers zero avec le taux inverse de refroidissement","PeriodicalId":14822,"journal":{"name":"Journal De Physique Lettres","volume":"45 1","pages":"893-900"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76655081","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}
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