Aging Phenomena in Spin Glasses
旋转玻璃的老化现象
基本信息
- 批准号:10640362
- 负责人:
- 金额:$ 0.9万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1998
- 资助国家:日本
- 起止时间:1998 至 1999
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
By means of extensive Monte Carlo simulations on the 3 and 4 dimensional Ising EA models, we have studied aging phenomena in spin glasses. The phenomena are associated with the relaxation of a spin-glass (SG) system to equilibrium after it is rapidly quenched to a temperature below its transition temperature TィイD2cィエD2 The following results have been obtained.An isothermal aging process is the relaxation of the system after it is quenched to a temperature below TィイD2cィエD2. From the simulational results on various quantities, such as the spin auto-correlation function and the interaction energy, it is concluded that this aging process is regarded as the growth process of domains of locally equilibrated states by means of the thermally activated processes, and that time evolutions of the physical quantities simulated are well described by the scaling expressions which are derived form the droplet picture on the SG phase.An experimental temperature-shift protocol is to change temperature … More to TィイD22ィエD2 after waiting for a period of tィイD2w1ィエD2 in the isothermal aging at TィイD21ィエD2 , and to observe subsequent aging of the system at TィイD22ィエD2 . From our results simulated we have proposed the 'quasi-domains within domain' scenario to describe the aging process in this protocol. Namely, in each domain which has grown up by the first aging at TィイD21ィエD2 and whose mean size is R(tィイD2w1ィエD2), droplet excitations, locally equilibrated to TィイD21ィエD2 just before the T-shift, relaxe to local equilibrium at TィイD22ィエD2 (growth of 'quasi-domains'). After the mean size of the 'quasi-domains' catches up R(tィイD2w1ィエD2), i.e., this re-equilibration has completed, the system becomes in a genuine isothermal process at TィイD22ィエD2. This scenario is based on the simulational result that the domains grow continuously even when the temperature is changed within the SG phase. The scenario consistenly explains the memory effect observed experimentally. However, another interesting phenomenon, observed experimentally and called the rejuvenation, has not been reproduced by the present simulation. This problem is left for a future investigation. Less
本文利用三维和四维Ising EA模型的MonteCarlo模拟方法,研究了自旋玻璃中的老化现象。这一现象与自旋玻璃(SG)系统在快速淬火到其转变温度T_(10)D_(20)D_(20)以下后弛豫到平衡状态有关。从自旋自相关函数和相互作用能等各种物理量的模拟结果可以看出,这一老化过程可以看作是热激活过程中局域平衡态畴的生长过程,从SG上的液滴图像导出的尺度表达式很好地描述了模拟物理量的时间演化一种实验性的温度转换协议是改变温度 ...更多信息 在T D21 D2的等温老化中等待t D2 w1 D2的时间段后,观察到T D22 D2的系统的后续老化。从我们的模拟结果,我们提出了“准域内域”的场景来描述在这个协议的老化过程。也就是说,在每一个已经长大的第一次老化在T D21 D2和其平均大小为R(t D2 w1 D2),液滴激发,局部平衡到T D21 D2之前的T-移位,放松到局部平衡在T D22 D2(增长的“准域”)。在“准域”的平均大小赶上R(t D2 w1 D2)之后,即,这种再平衡已经完成,系统在T_(22)= D_(22)= D_(22)处变成真正的等温过程。这种情况是基于模拟结果,即使在SG相内的温度变化时,畴也会连续生长。这个情景一致地解释了实验观察到的记忆效应。然而,另一个有趣的现象,观察实验和所谓的复兴,还没有被复制本模拟。这个问题留待将来调查。少
项目成果
期刊论文数量(18)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H. Yoshino and H. Takayama: "Aging Dynamics of an Elastic String Diffusing in a Disordered Media"in Slow ,Dynamics in Complex Systems: Eighth Tohwa University International Symposium, eds. M. Tokuyama and I. Oppenheim (American Inst. Phys. 1999). 707-708
H. Yoshino 和 H. Takayama:“在无序介质中扩散的弹性弦的老化动力学”,复杂系统中的慢速动力学:第八届东和大学国际研讨会,编辑。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
H.Takayama: "Numerical Study on Aging Dynamics in the 3D Ising Spin-Glass Model. Quasi-Equilibrium Behaviour of Spin Auto-Correlation Function"to appear in Int.J.Mod.Phys.(2000). (2000)
H.Takayama:“3D Ising 自旋玻璃模型中老化动力学的数值研究。自旋自相关函数的准平衡行为”出现在 Int.J.Mod.Phys.(2000) 中。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
H. Yoshino: "Aging Dynamics of an Elastic String Diffusing in a Disordered Media"in Slow Dynamics in Complex Systems: Eighth Tohwa University International Symposium, eds. M. Tokuyama and I. Oppenheim (American Inst. Phys. 1999). 707-708 (1999)
H. Yoshino:“在无序介质中扩散的弹性弦的老化动力学”,复杂系统中的慢速动力学:第八届东和大学国际研讨会,编辑。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
T. Komori: "Numerical Study on Aging Dynamics in the 3D Ising Spin-Glass Model. II. Quasi-Equilibrium Regime of Spin Auto-Correlation Function"J. Phys. Soc. Jpn. (to appear). (2000)
T. Komori:“3D Ising 自旋玻璃模型中老化动力学的数值研究。II. 自旋自相关函数的准平衡状态”J。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
K. Hukushima, H. Yoshino and H. Takayama: "Numerical Study of Aging Phenomena in Short-Ranged Spin Glasses"Prog. Theor. Phys. Suppl.. (to appear). (2000)
K. Hukushima、H. Yoshino 和 H. Takayama:“短程自旋玻璃老化现象的数值研究”Prog。
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- 影响因子:0
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TAKAYAMA Hajime其他文献
TAKAYAMA Hajime的其他文献
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{{ truncateString('TAKAYAMA Hajime', 18)}}的其他基金
Glassy Dynamics in Random Spin Systems
随机自旋系统中的玻璃动力学
- 批准号:
12640367 - 财政年份:2000
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Statistical Physics of Fluctuations in Glassy
玻璃态涨落的统计物理
- 批准号:
10044064 - 财政年份:1998
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
Aging Phenomena in Complex Systems
复杂系统中的老化现象
- 批准号:
08044060 - 财政年份:1996
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for international Scientific Research
Studies on Mechanisms of Hierarchical Relaxation in Spin Glasses
自旋玻璃分级弛豫机制研究
- 批准号:
08640477 - 财政年份:1996
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Transition and Dynamics in Complex Systems
复杂系统中的转变和动力学
- 批准号:
06044031 - 财政年份:1994
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for international Scientific Research
Ergodic-NonErgodic Transition Phenomena in Condensed Matters
凝聚态物质中的历经-非历经转变现象
- 批准号:
01540298 - 财政年份:1989
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Dynamics Associated with Metastable States in Random Systems
与随机系统中亚稳态相关的动力学
- 批准号:
60540227 - 财政年份:1985
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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