MonteCarlo

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  • 1777 Buffon 1942

    (Fermi, Metropolis, Ulam, etc)1945 ENIAC (Pennsylvania Univ.) 1946 (Ulam )1952 MANIAC (Los Alamos) 1953 Metropolis, Rosenbluth2, Teller2: 1955 Fermi-Pasta-Ulam 1957 Alder-Wainwright: 1959 Fosdick: Ising model 1962 Handscomb: 1976 Suzuki: 1987 Swendsen-Wang:

  • Buffon

    =

    2pi

    3408 =3.1415929 (Lazzerini 1901)

  • ENIAC

    by Maria G. Mayer (1951)( )

    :

    )10( : logmin

    irr

    rd

    i

    i

  • 1941 Ph.D. (Experimental Physica, University of Chicago)1943 Los Alamos National Laboratory1945 Return to Chicago1946 ``Monte Carlo method'' was named by S.Ulam1948 Return to Los Alamos1948 The first actual Monte Carlo calculations on ENIAC1952 MANIAC became operational1953 The Metropolis algorithm published

    (Metropolis, A. Rosenbluth, M. Rosenbluth, A. Teller, and Edward Teller)

    1957 MANIAC II1957 Return to Chicago1965 Return to Los Alamos

    Metropolis

    Metropolis, Nicholas Constantine (1915-1999)

  • ( )( ) ( )

    ( )( ) ( )

    ( )

    ==

    ii

    iii

    S

    Si SW

    SQSW

    SW

    SQSWQconstSP

    ( ) ( )( ) ( )

    ( )( )

    1

    =

    i

    ii

    S

    Sii

    SQ

    SW

    SQSWQSWSP

    Metropolis, Rosenbluth, Rosenbluth, Teller, Teller 1953

  • Markov

    ( ) ( ) ( ) ( )SWSSPSWSSP = | |

    ( )SW

    Metropolis, Rosenbluth, Rosenbluth, Teller, Teller 1953

  • Alder-Wainwright

    Metropolis, Rosenbluth, Rosenbluth, Teller, Teller 1953

  • Ising Model

    Fosdick 1959Cu3Au

    CF: Peierls Onsager

  • Fermi, Pasta, and Ulam 1955

  • Alder-Wainwright 1957

    Kirkwood 1935,Born-Green 1959

  • g:

    Kawashima-Young 1995

  • Handscomb's method (1962, modified by Lyklema in 1982)

    ( )

    ( )operator '``swap'

    2

    0

    1,0

    1

    =

    +=

    >=

    +

    +

    ij

    iii

    i

    zii

    ii

    E

    constEJH

    JSHJH SSm

    ( ) ( ) ( )( )

    ( ) ( ) ( )( ) ),( , ,,,

    Tr!

    1Tr!

    21

    00

    121

    0

    kkkn

    ppppH

    n

    nCCn

    n

    n

    nn

    jippppCEEEEe

    n

    JCW

    CWHn

    Z

    nn

    =

    =

    ==

    =

    =

    =

    L

    L

    "C'' C

  • Handscomb's method( ) ( )nkknkk ppppppCpppppC ,,,,,,, ,,,,,, 1new21121 LLLL ++

  • ( )

    ( )

    ( )( )

    =

    =

    =

    +

    =

    S

    S

    M

    kkk

    SSLM

    SSLd

    SW

    SSw

    eDS

    eDSZM

    kkk

    ,

    11

    ,

    ,

    1

    0

    &

    &

    S :

    Suzuki 1976

  • ( ) ( )( )

    =

    SWSWSSP ' , 1min |'

  • Swendsen-Wang

    S G S

    Swendsen-Wang 1987

    ( ) ( ) ( ) ( )GWGSPSWSGP | | =

  • Evertz-Lana-Marcu 1993

    ( ) =2

    JP

    :

  • ( ) =2

    JP ( )2

    J=

  • =

    S

    ii

    2

    1,

    2

    1S

    )(Tr)(TrSLL P

    =

    1,1 21, 1,2 2,2

    Split-spin trick

    Kawashima-Gubenatis 1995Harada-Troyer-Kawashima 1998

  • An SU(N) model

    ( ) ( )( )

    ',

    =rr

    rJrJNJH

    Representation:

    Hamiltonian:

    Santoro et al. (1999), presentAffleck (1985), Arovas-Auerbach (1988)

    Read-Sachdev (1990)

    [ ] NJJJJ ,,2,1,,, , L==

  • Magnetic Correlation Function

    Finite Neel order for N=2,3,4, but no Neel order for N>=5

    ( ) ( ) = r

    ZZrd

    d SrSLLM

    S 0 )1( 2

    ,

    ,

    pipipipi

    ( )

    ( )

    )5(0004.0 :6)8(0003.0 :5

    )6(158.0 )2(025.0 :4

    )2(291.0 )1(085.0 :3

    2

    2

    2

    2

    ==

    ==

    =

    ==

    =

    ==

    s

    s

    s

    s

    s

    s

    mNmNm

    mNm

    mN

  • Sandvik-Kurkijarvi 1991

    ( ) ( ) ( )

    { }( )

    ( ){ }

    ( ) ( )

    ( )

    ( ) ( ) ( )( )

    =

    =

    =

    =

    =

    =

    =

    +==

    =

    =

    = = =

    =

    =

    Cn

    G SiLiLLi

    n

    Hk

    n

    G

    L

    kg

    n

    L

    k

    n

    k

    L

    n n

    L

    k

    n

    nLL

    n

    nn

    n

    nn

    SSSSGSCCW

    SHSSHSSHSL

    nL

    HNggggG

    HL

    nL

    HL

    nL

    Hn

    Ln

    eHn

    Hn

    Z

    LL

    k

    k

    k

    kkk

    k

    ,,, , ,

    ! !

    1 , ,2 ,1 ,0,,,

    Tr!

    !

    Tr!

    !

    1,0 Tr!

    oTr!

    Tr!

    21

    1211

    0

    21

    1

    1

    0 : 1

    100

    11

    L

    L

    L

    L

  • ( ) ( ) ( )

    ( )

    ( )

    ( ) ,,,

    ,,,

    ,

    ! ! 1

    21

    21

    121 1

    n

    n

    iLi

    n

    C

    gggG

    SSSS

    GSC

    SHSSHSLLCWCWZ

    L

    L

    L

    L

    =

    Sandvik-Kurkijarvi 1991

    1

    2

    3

    L

    L-1