December 2 - 4, 2005

Zhejiang University

Hangzhou 310027, China

This workshop intended to be parallel in nature to the one organized by the Center for Simulational Physics at The University of Georgia in Athens, GA, U.S.A.. The main purpose of this workshop is to stimulate research and cooperation in simulational physics, and related subjects such as computational biology and finance etc. We hope to create an atmosphere for discussion and cooperation in this informal workshop and wish to encourage more researchers to engage in computer simulations.

Topics of interest include Monte Carlo simulation, molecular dynamics and numerical study of physical problems such as materials growth, granular flow, structural and magnetic phase transitions, polymers, surfaces and interfaces, genomics, strongly correlated electron systems, complex network and econophysics.

There will be invited talks (40-60 mins) and contributing talks (20-30 mins). The number of participants is expected to be about 30. No registration fee will be charged, and a double room costs $24 (200 yuan) per night. Two students may share a double room with two beds. Lunches and a banquet will be offered by the workshop. Dec. 4 will be for sightseeing.

If you like to present a talk, please give the title and abstract. Graduate student participation is encouraged, and 8 fellowships for students are available for accommodation. Please send the CV and publication list for application. The deadline for receiving the application is Nov. 15. After the deadline hotel rooms and fellowships are not guaranteed.

Organizing Committee:

K. Binder (Johannes Gutenberg-University, Mainz)

D.P. Landau (Zhejiang University and University of Georgia)

B. Zheng (Zhejiang University, Chairman)

R. Ziff (University of Michigan)

For registration, please send an e-mail to:

B. Zheng, bozheng@zju.edu.cn, Phone: 86 -571 – 87952753

Accommodation:

Rooms in Yuquan hotel are reserved. A double room costs $24 (200 yuan)

per night. Two students may share a double room with two beds.

On Dec. 1, after 16:00, a registration desk will be set up in the lobby of Yuquan hotel.

Participants arriving earlier may directly check-in the hotel first.

Some participants may be arranged in other hotels. In this case,

messages will be sent to inform you.

Yuquan hotel (玉泉饭店)：

           杭州市玉古路138号
         Tel：（0571）8798 2678   （operator）
         Fax：（0571）8799 3340   （销售部）

Jinxi Shangzhuan (金溪山庄)：

          杭州市西山路15号
        Tel：（0571）8799 2288          (operator)
        Fax：（0571）8798 0888   （销售部）

      Lily hotel (百合花饭店)：

          杭州市曙光路45号
        Tel：（0571）87991188 （operator）
        Fax：（0571）8799 1166      (销售部）

      Lingfeng Shangzhuang (灵峰山庄)：

          杭州市玉古路140号
        Tel：（0571）8797 1456   （operator）
        Fax：（0571）8795 2813 （销售部）
　

Jinxi Shangzhuan (金溪山庄) is in 杨公堤 in West Lake

Other hotels are just around the main gate of Yuquan Campus, Zhejiang Univ.

Board and tours:

The workshop offers lunches from Dec. 2 - 3, and a banquet in the evening

of Dec. 2.

Around the main gate of Yuquan Campus, there is a variety of

restaurants for dinners.

There will be a tour to West Lake Dec. 4, and it is free.

Transportations:

1. Arriving at the Pu-Dong airport in Shanghai

There is a bus connection from the airport to Hangzhou, it costs

about $12. The last bus departs at 19:30. If someone arrives in the

the evening of Dec. 1, please inform us and a car or a mini-bus may

be arranged.

2. Arriving at the airport in Hangzhou

There is a bus connection to Hangzhou, it costs about $2. By taxi,

it costs about $15.

3. Inside Hangzhou, it costs about $1 - $3 to reach anywhere by taxi.

4. Bus connections in Hangzhou

K21路从城站火车站到浙大玉泉校区正门，

K28路从火车东站到浙大玉泉校区（浙大附中站下车）,

K228路从火车东站到浙大玉泉校区正门。

Return tickets:

Anyone who needs a return ticket may ask for help on the registration desk.

Conference hall:

The workshop will be held in Zhejiang Institute of Modern Physics.

Visas:

Anyone who needs a letter of invitation for a visa should provide

a Fax number and a surface-mail address.
　

Maps and websites:

Yuquan Campus, Yuquan hotel, Lingfeng Shangzhuang and Lily hotel

Zhejiang University and West Lake

West Lake
　

Temperature:

7 – 14 degree of centigrade

Useful Tel. numbers:

Chinese: L.P. Shan 0571- 8795 3312 (o), 1385 7194 311 (handy)

English: B. Zheng 0571- 8795 2753 (o), 1381 9494 123 (handy)

T. Xiao 1358 8750 799 (handy)

Invited speakers:

B. Duenweg (Max-Plank-Institute for Polymer, Germany)

X. Hu (National Institute for Materials Science, Tokyo)

N. Ito (University of Tokyo)

B.J. Kim (Sung-Kyun-Kwan Univ. Korea)

D.P. Landau (Zhejiang University and University of Georgia)

H. Takayama (University of Tokyo)

S. Trimper (Martin-Luther Univ., Germany)

M. Widom (Carnegie-Mellon Univ.)

R. Ziff (University of Michigan)

Titles and abstracts

W.J. Bai (F)*       Dept of Chemistry, Univ of Science and Technology of China

Hefei,Anhui, 230026, PR China

e-mail: wjbai@mail.ustc.edu.cn， Tel: 13155116842

                    Extremal optimization

– from self-organized criticality to natural computation

This talk contains three sections. First, the basic concept of extremal

optimization (EO) and its algorithm process are introduced, and a brief review on

its applications for some famous NP-hard discrete optimization problems are given,

including finding the lowest-energy configuration for the Ising spin glass system,

graph partitioning, traveling salesman problem, threecoloring problem, and so on.

Second, the continuous extremal optimization (CEO) algorithm are introduced, which

can be considered as an extension of extremal optimization aiming at continuous

optimization problems. We demonstrate it on a well-known continuous optimization

problem: the Lennard-Jones cluster optimization problem. Third, the method to

enhance CEO’s performance by combining EO and some other global optimization

algorithms are introduced. (The content of section 2 has been published in Phys.

Rev. E 72, 016702(2005), and the section 3 will be submitted to Chem. Phys. Lett.)

Burkhard Duenweg Max-Plank-Inst. for Polymer, Ackermannweg 10,55128 Mainz,Germany;

Associate Editor, Phys. Rev. E

e-mail: duenweg@mpip-mainz.mpg.de

trip: arrival at Hangzhou, Air China 1704, Wed Nov 30, 13:45

          departure from Guangzhou, Lufthansa 789, Wed Dec 7, 00:30 !!

Talk 1: Mesoscopic Simulations for Problems with
Hydrodynamics I: Methods

1. Hydrodynamic interactions

2. Long-time tails

3. Brownian Dynamics

4. Dissipative Particle Dynamics

5. Multi-Particle Collision Dynamics

6. Lattice Boltzmann

7. Coupling Lattice Boltzmann $ Molecular Dynamics

Talk 2: Mesoscopic Simulations for Problems with
Hydrodynamics II: Application to Soft Matter

1. Polymer statics: Random walk, self-avoiding walk, semidilute solutions

2. Polymer dynamics: Rouse model, Zimm model

3. Hydrodynamic screening, incomplete screening

4. Computational challenge

5. Simulations of the dynamics of semidilute polymer solutions

6. Electrophoresis of colloidal suspensions

J.Q. Fang China Institute of Atomic Energy,
P.O.Box 275-81, Beijing, 102413, P.R.China

e-mail: fangjinqing@gmail.com

A Unified Hybrid Preferential Model of Complex Network and
its Universal Properties

Sung Guk Han (Sung-Kyun-Kwan Univ. Korea)

e-mail: schwinger@hanmail.net

trip: arrival at Hangzhou, CA140， Dec 1,14:20
departure from Hangzhou, CA139, Dec 7, 09:15

Reentrant phase transition in the six species predator-prey model
on complex networks

We investigate the phase diagram for the six species predator-prey
model in one- and two-dimensional Watts-Strogatz networks. As the
spatial randomness (controlled by therewiring probability $\alpha$) and
the temporal randomness(tuned by the mutation rate $P$) are varied the
systemexhibits the well-defined phase transition at which the defensive
alliance of three species become unstable. In a certain range of $P$,
the phase diagram displays the reentrant behaviors, i.e., the systemis
disordered at small $\alpha$, ordered in the intermediate region, and
then back to disordered state as $\alpha$ is increased further,
indicating that the role of the randomly rewired edges is two-fold.

D.Y. Hua Physics Dept, Ningbo Univ, Ningbo 315211,China

e-mail: huadayin@nbu.edu.cn

Non-equilibrium Phase Transition with Absorbing States and
Critical Behavior in Surface Reaction-Diffusion System

Recently, the non-equilibrium phase transition with absorbing states in surface

reaction-diffusion system has attracted much more attention. In this report,

we discuss the effect of the dissociation mechanism of a dimer and the particle

diffusion on the phase transition behavior. It is shown that the dissociation

mechanism of a dimer can change the phase transition behavior in some reaction

systems. When considering the particle diffusion on surface, the structure of the absorbing states can change obviously, it is found that the critical behavior

of the continuous phase transition is changed apparently.

References

1. J. Marro and R. Dickman, Non-equilibrium Phase Transitions in Lattice Models

(Cambridge Univ. Press, Cambridge, England, 1999).

2. H. Hinrichsen, Adv. Phys. 49, 815 (2000)

3. G. Odor, Rev. Mod. Phys. 76, 663-724 (2004).

4. R. M. Ziff, E. Gulari and Y. Barshad, Phys. Rev. Lett. 56, 2553 (1986).

5. V. P. Zhdanov, Surf. Sci. Rep. 45, 231 (2002).

6. M. Henkel and H. Hinrichsen, J. Phys. A 37, R117-R159 (2004).

X.   Hu      Computational Materials Science Center,
              National Institute for Materials Science,
              Sengen 1-2-1, Tsukuba 305-0047, Japan

e-mail: HU.Xiao@nims.go.jp

trip: arrival at Hangzhou Dec 1
departure from Hangzhou Dec 5 (accommodation arranged by MB Luo)

            Talk I: Density-functional theory for melting phenomena of
                   interlayer Josephson vortex lattice in high-Tc
                   cuprate superconductors

                    Ref: X. Hu, M.B. Luo, and Y.Q. Ma, Phys.Rev.B72,174503(2005).

          Talk II: Room-temperature ferrimagnetism and half-metallic property
                   in a new class of perovskite cuprates

                   Refs: X.G. Wan, M. Kohno and X. Hu, Phys.Rev.Lett.94,087205(2005)
                                                       Phys.Rev.Lett.95,146602(2005)

Nobuyasu Ito Department of Applied Physics, School of Engineering,
The University of Tokyo, Tokyo 113-8656, JAPAN

e-mail: ito@ap.t.u-tokyo.ac.jp

trip: arrival at Hangzhou, NH929，Nov 30, 12:50
departure from Hangzhou, NH930, Dec 7, 13:50

Talk 1: Evolution of ecosystem with size-free model

We proposed an evolutional dynamical model of ecosystem named the "size-free model",

where new species appear and extinct. Instead of the standard quadratic inter-species

interaction, $x_i \cdot x_j$, assumed in Lotka-Volterraand predator-prey models,

the size-free model fractional has interaction terms of the form of

$x_i^{1-\lambda} \cdot x_j^\lambda$. With computer simulation analysis, it is shown

that this model reproduces food-web networks as complex as ones we observe in nature,

and life-time distribution of species estimated from fossils. There are two phases

in the size-free model: steady phase and diversifing phase. In the steady phase, number

of species reaches to steady values and fluctuate around it. In the diversifing phase,

it continues to increase in time.

References:

T. Shimada, S. Yukawa and N. Ito, "Self-Organization in an ecosystem",

Artificial Life and Robotics, vol.6 (2002) p.78

T. Shimada, S. Yukawa and N. Ito, "Life-span of families in fossil data forms q-exponential

distribution", Intern. J. Mod. Phys. C14 (2003) p.1267

Y. Murase, T. Shimada, S. Yukawa and N. Ito, "The behavioral adaptation and the

diversification in ecosystem", in preparation.

Talk 2: Cluster-cluster aggregation of
2D Ising-type dipole particles

Recent experimental studies are reporting interesting pattern formation and aggregation

process in the Ising-type dipole system, where the dipole direction is limited only

to up and down just like the Ising spin. In this talk, our simulational results are shown.

Our experimental simulation using floating magnet on water reproduces characteristic

clustering of particles and its dynamics are analyzed by computer simulation. The dominant

process turns out to be cluster-cluster aggregation, and clusters with odd number of

particles are dominant.

References:

I. Varga, H. Yamada, F. Kun, H.-G. Matuttis and N. Ito, "Structure formation in a binary

monolayer of dipolar particles", Phys. Rev. E71 (2005) 051405

N. Yoshioka, I. Varga, F. Kun, S. Yukawa and N. Ito, "Attraction-limited cluster-cluster

aggregation of Ising dipolar paticles", to appear in Phys. Rev. E.

Beom Jun Kim Department of Physics,Sung-Kyun-Kwan University,
440-746 Suwon, Korea

     e-mail: beomjun@skku.edu
       Tel: (+82)31-299-4541
       Fax: (+82)31-290-7055

trip: arrival at Hangzhou, CA140， Dec 1,14:20
departure from Guangzhou, CA139, Dec 7, 09:15

Network Marketing on a Small-World Network

We investigate a dynamic model of network marketing in a small-world network
structure artificially constructed similarly to the Watts-Strogatz network model.
Different from the traditional marketing, consumers can also play the role of the
manufacturer's selling agents in network marketing, which is stimulated by the
referral fee the manufacturer offers. As the wiring probability $\alpha$ is
increased from zero to unity, the network changes from the one-dimensional regular
directed network to the star network where all but one player are connected to one
consumer. The price $p$ of the product and the referral fee $r$ are used as free
parameters to maximize the profit of the manufacturer. It is observed that at
$\alpha=0$ the maximized profit is constant independent of the network size $N$
while at $\alpha \neq 0$,it increases linearly with $N$. This is in parallel to
the small-world transition.It is also revealed that while the optimal value of
$p$ stays at an almost constant level in a broad range of $\alpha$, that of $r$
is sensitive to a change in the network structure. The consumer surplus is also
studied and discussed.

David P. Landau Center for Simulational Physics, Univ. of G eorgia, Athens, GA 30602, U.S.

e-mail: dlandau@hal.physast.uga.edu

trip: arrival at Shanghai, Flight NW 25, Nov 30, 8:20PM
departure from Hongkong, Dec 13

Do Spin-Waves Exist in Iron above T_c?

Manabu Machida Inst of Industrial Science, Univ of Tokyo,
Tokyo 153-8505, Japan

e-mail: machida@iis.u-tokyo.ac.jp

trip: arrival at Hangzhou, CA1706， Dec 1, 17:55
departure from Hangzhou, CA1704, Dec 4, 13:10

Numerical simulation of the temperature dependence
of the ESR intensity of the nanomagnet V15

Hajime Takayama   Institute for Solid State Physics, University of Tokyo
                    Kashiwa-no-ha 5-1-5, Kashiwa, Chiba 277-8581, Japan

     e-mail: takayama@issp.u-tokyo.ac.jp
     Tel&Fax: +81-4-7136-3440

     trip: arrival at Hangzhou, CA 1706,Dec 1,17:55

           departure from Hangzhou, JL 636,Dec 5, 13:15

Numerical Experiments on Some Spin Systems

Most of numerical simulations so far carried out have been aimed
to confirm (or disprove) an existing theoretical prediction or an
interpretation of experimental results, as well as to extract some
quantitative results such as values of critical exponents of a
certain phase transition, which are hardly possible by analytical
studies. More interesting features of numerical simulations are,
I think, to find numerically new physical phenomena or/and concepts
based on a well-defined microscopic Hamiltonian. These I call
'numerical experiments'. In this talk, I'll discuss such numerical
experiments we have recently carried out. One is on the quasi-1D
(2D) antiferromagnetic Heisenberg model, for which we have found a
universal relation between the Neel temperature and the interchain
(interlayer) coupling strength by the quantum Monte Calro
simulation [1]. Another is on a magnetic dipole-moment system on a
finite-sized cubic lattice, in which we have found a peculiar
`from-Edge-to-Interior' spin freezing process by the molecular
dynamics simulation [2]. If a time is allowed, I'll talk about
a standard Monte Carlo simulation on an Ising spin glass, which
sheds a light on a long-standing problem in the spin-glass study,
namely, whether the spin-glass phase is stable or not under a
uniform magnetic field [3].

1] C. Yasuda et al, Phys. Rev. Lett. 94 (2005) 217201.
2] K. Matsushita et al, J. Phys. Soc. Jpn. 74 (2005) 2651.
3] H. Takayama and K. Hukushima, J. Phys. Soc. Jpn. 73 (2004) 2077

Steffen Trimper Physics Department, Martin-Luther Univ.,
06099 Halle, Germany

e-mail: trimper@physik.uni-halle.de

     trip: arrival at Hangzhou, FM 9152, Dec 1, 15:35,

departure from Guangzhou, CA 1310, Dec 7, 08:35

Talk 1: Thin ferroelectric films

Talk 2: Let's have a party

Talk 3: Models with feedback

X. Wan Zhejiang Institute of Modern Physics, Zhejiang University
Hangzhou, 310027, P.R. China

e-mail: xinwan@zimp.zju.edu.