메뉴 건너뛰기




Volumn 65, Issue 6, 2002, Pages

Fragility of the free-energy landscape of a directed polymer in random media

Author keywords

[No Author keywords available]

Indexed keywords

CHAOS THEORY; FREE ENERGY; MATHEMATICAL MODELS; MATRIX ALGEBRA; PERTURBATION TECHNIQUES; RANDOM PROCESSES; SPIN GLASS;

EID: 41349101695     PISSN: 1063651X     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevE.65.066131     Document Type: Article
Times cited : (45)

References (74)
  • 9
    • 85036235298 scopus 로고    scopus 로고
    • E. Vincent, J. Hammann, and M. Ocio, Recent Progress in Random Magnets (World Scientific, Singapore, 1992);, P. Nordblad and P. Svedlindh, in Spin Glasses and Random Fields, edited by A. P. Young Series on Directions in Condensed Matter Physics Vol. 12 (World Scientific, Singapore, 1998)
    • E. Vincent, J. Hammann, and M. Ocio, Recent Progress in Random Magnets (World Scientific, Singapore, 1992);P. Nordblad and P. Svedlindh, in Spin Glasses and Random Fields, edited by A. P. Young Series on Directions in Condensed Matter Physics Vol. 12 (World Scientific, Singapore, 1998).
  • 25
    • 0012575045 scopus 로고
    • For a review of directed polymer in random media, see T. Halpin-Healy and Y. C. Zhang, Phys. Rep. 254, 215 (1995).
    • (1995) Phys. Rep. , vol.254 , pp. 215
    • Halpin-Healy, T.1    Zhang, Y.C.2
  • 45
    • 85036292096 scopus 로고    scopus 로고
    • M. Kardar, in Proceedings of Fluctuating Geometries in Statistical Mechanics and Field Theory, edited by F. Daivid, P. Ginzparg, and J. Zinn-Justin (Elsevier, Amsterdam 1996)
    • M. Kardar, in Proceedings of Fluctuating Geometries in Statistical Mechanics and Field Theory, edited by F. Daivid, P. Ginzparg, and J. Zinn-Justin (Elsevier, Amsterdam 1996).
  • 48
    • 36149041166 scopus 로고
    • J. Phys. AG. Parisi13, 1101 (1980);
    • (1980) , vol.13 , pp. 1101
    • Parisi, G.1
  • 49
    • 0040300147 scopus 로고
    • J. Phys. AG. Parisi13, 1887 (1980).
    • (1980) , vol.13 , pp. 1887
    • Parisi, G.1
  • 50
    • 85036132399 scopus 로고    scopus 로고
    • M. Mézard, G. Parisi, and M. A. Virasoro, Spin-Glass Theory and Beyond (World Scientific, Singapore, 1988)
    • M. Mézard, G. Parisi, and M. A. Virasoro, Spin-Glass Theory and Beyond (World Scientific, Singapore, 1988).
  • 53
    • 85036139820 scopus 로고    scopus 로고
    • the spin-glass problems the chaos exponent is denoted as (Formula presented). Here we do not use the convention because it is usually used for the roughness exponent (Formula presented)
    • In the spin-glass problems the chaos exponent is denoted as (Formula presented). Here we do not use the convention because it is usually used for the roughness exponent (Formula presented).
  • 54
    • 85036369412 scopus 로고    scopus 로고
    • We observed the following numerically within the lattice model we used in Sec. VII D. We computed root-mean-square average of the sample-to-sample fluctuations of energy, entropy, and free energy. Fluctuation of energy with respect to the mean value depends on temperature T as (Formula presented), where c is a numerical constant. Note that the (Formula presented) behavior shows up only at sufficiently large length scales (as found in 3). The temperature dependence is consistent with the observation that fluctuation of energy at (Formula presented) (ground state) scales as (Formula presented), which is often assumed in the scaling arguments. On the other hand the entropic fluctuation scales as (Formula presented), which is consistent with the observation that the fluctuation of free energy (Formula presented) scales as (Formula presented)
    • We observed the following numerically within the lattice model we used in Sec. VII D. We computed root-mean-square average of the sample-to-sample fluctuations of energy, entropy, and free energy. Fluctuation of energy with respect to the mean value depends on temperature T as (Formula presented), where c is a numerical constant. Note that the (Formula presented) behavior shows up only at sufficiently large length scales (as found in 3). The temperature dependence is consistent with the observation that fluctuation of energy at (Formula presented) (ground state) scales as (Formula presented), which is often assumed in the scaling arguments. On the other hand the entropic fluctuation scales as (Formula presented), which is consistent with the observation that the fluctuation of free energy (Formula presented) scales as (Formula presented).
  • 55
    • 85036169198 scopus 로고    scopus 로고
    • G. Forgacs, R. Lipowsky, and Th. M. Nieuwenhuizen, in Phase Transitions and Critical Phenomena, edited by C. Domb and J. Lebowitz (Academic Press, Kondon, 1991), Vol 14
    • G. Forgacs, R. Lipowsky, and Th. M. Nieuwenhuizen, in Phase Transitions and Critical Phenomena, edited by C. Domb and J. Lebowitz (Academic Press, Kondon, 1991), Vol 14.
  • 60
    • 85036293405 scopus 로고    scopus 로고
    • To treat the replica number n as a scaling variable has been proposed by several authors 23 42
    • To treat the replica number n as a scaling variable has been proposed by several authors 2342.
  • 61
    • 85036319955 scopus 로고    scopus 로고
    • The choice of renormalized D in Eq. (82) allowed to simplify the calculation. One can work also with the original D and will find the same positive (Formula presented) of order (Formula presented) up to some irrelevant differences
    • The choice of renormalized D in Eq. (82) allowed to simplify the calculation. One can work also with the original D and will find the same positive (Formula presented) of order (Formula presented) up to some irrelevant differences.
  • 64
    • 85036372228 scopus 로고    scopus 로고
    • Note that here we do not use rescaled variables such as in Eq. (98)
    • Note that here we do not use rescaled variables such as in Eq. (98).
  • 65
    • 85036341178 scopus 로고    scopus 로고
    • The same results are obtained if we consider that the two strings are tilted with (Formula presented) and (Formula presented), respectively
    • The same results are obtained if we consider that the two strings are tilted with (Formula presented) and (Formula presented), respectively.
  • 71
    • 85036429913 scopus 로고    scopus 로고
    • J-P. Bouchaud, in Soft and Fragile Matter, edited by M. E. Cates and M. R. Evans (Institute of Physics, Bristol, 2000);, e-print cond-mat/9910387
    • J-P. Bouchaud, in Soft and Fragile Matter, edited by M. E. Cates and M. R. Evans (Institute of Physics, Bristol, 2000);e-print cond-mat/9910387.
  • 74
    • 0000240892 scopus 로고    scopus 로고
    • (unpublished)
    • H. Yoshino, Phys. Rev. Lett. 81, 1493 (1998); and(unpublished).
    • (1998) Phys. Rev. Lett. , vol.81 , pp. 1493
    • Yoshino, H.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.