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One Parameter Scaling Theory for Stationary One Parameter Scaling Theory for Stationary States of Disordered Nonlinear SystemsStates of Disordered Nonlinear Systems
One Parameter Scaling Theory for Stationary One Parameter Scaling Theory for Stationary States of Disordered Nonlinear SystemsStates of Disordered Nonlinear Systems
Joshua D. Bodyfeltin collaboration with
Tsampikos Kottos & Boris Shapiro
MaxPlanckInstitute für Physik komplexer SystemeCondensed Matter Division
in cooperation with
Wesleyan University, CQDMP GroupTechnion – Israel Institute of Technology
supported by
U.S. Israel Binational Science Foundation (BSF)DFG FOR760 “Scattering Systems with Complex Dynamics”
New Perspectives in Quantum Statistics and Correlations – Heidelberg – Mar. 4th 2010
A Brief SynopsisA Brief Synopsis A Brief SynopsisA Brief Synopsis
A. Brief Review of Disorder
1. Motivations from the Laboratory
2. A Characteristic Length for Anderson Localization
3. Modeling Disorder in Quasi1D Systems
3. One Parameter Scaling Theory (OPST)
B. Including Nonlinearity
1. A Brief Mention of Nonlinear Numerical Methods
2. Nonlinear Parametric Evolution
3. Failure of Linear OPST
4. Setting Nonlinear References
5. The Nonlinear OPST
C. Conclusions
Motivations from the LaboratoryMotivations from the Laboratory Motivations from the LaboratoryMotivations from the Laboratory
From Acoustics...
Hu, et al. NaturePhys. 4, 945 (2008)
...to Optics...
...to Atomics...
Lahini, et al. Phys. Rev. Lett. 100, 013906 (2008)
A. Aspect, et al., Nature 453, 891 (2008)
“Does Localization Survive the Nonlinearity?”
A Characteristic Length for Anderson LocalizationA Characteristic Length for Anderson Localization A Characteristic Length for Anderson LocalizationA Characteristic Length for Anderson Localization
N~NExtended
Nref
“Ergodic”
N≃N
Localized
∞≃∞
“Thermodynamic”
N
N=⟨1 /∑∣n∣4⟩
n=1
N
N=g ∞ ,Nref
BRM Modeling Disorder in Quasi1D SystemsBRM Modeling Disorder in Quasi1D Systems BRM Modeling Disorder in Quasi1D SystemsBRM Modeling Disorder in Quasi1D Systems
∞≃b2≫N ∞≃b
2≪N
⟨H nm⟩=0, ⟨H nm2 ⟩=
N11nm
b 2N−b1 ∈[−2,2]
= ∞ / Nref
Casati, Molinari, & Izrailev, Phys. Rev. Lett. 64, 1851 (1990)
One Parameter Scaling Theory (OPST) BasicsOne Parameter Scaling Theory (OPST) Basics One Parameter Scaling Theory (OPST) BasicsOne Parameter Scaling Theory (OPST) Basics
Kawabata, Prog. Theo. Phys. Sup. 84, 16 (1985)
g =d ln g d ln N
N~g ∞ , N ● Question
● Renormalization Group Equation
N NFor , N ∞ ,N g g ∞ , N , does ?
v x= dxdt
form similar to dynamical flow:v
x
OPST – BRM Linear CaseOPST – BRM Linear Case OPST – BRM Linear CaseOPST – BRM Linear Case
ln
ln g
g ≃c∞ /N
ref
1c∞ /Nref
=c1c
Kawabata, Prog. Theo. Phys. Sup. 84, 16 (1985)
Localized
Extended
Ergodic: ,Nref
∞Thermodynamic: g≃N
Nref
Izrailev, Phys. Rep. 196, 299 (1990)
A Brief Mention of Nonlinear Numerical MethodsA Brief Mention of Nonlinear Numerical Methods A Brief Mention of Nonlinear Numerical MethodsA Brief Mention of Nonlinear Numerical Methods
“Continuation” Method
F n=∑ H nmm∣n∣2n−n ; n=1,2,. . , N
m
F N1=∑∣m∣2−1
m
➢ Take the linear eigensolutions
➢ DNLSlike Equation, add small nonlinearity
➢ Solutions found from minimizing the function
using the linear eigensolutions as an initial guess.
~10−4
∑ H nmm=n ; n=1,2,. . , Nm
∑ H nmm∣n∣2n=n ; n=1,2,. . , N
m
➢ Repeat for next step in nonlinearity, using new solution as initial guess.
Parametric Nonlinear SpectraParametric Nonlinear Spectra Parametric Nonlinear SpectraParametric Nonlinear Spectra
Parametric Wavefunction EvolutionParametric Wavefunction Evolution Parametric Wavefunction EvolutionParametric Wavefunction Evolution
Lahini, et al. Phys. Rev. Lett. 100, 013906 (2008) Bodyfelt, Kottos, & Shapiro, Phys. Rev. Lett., submitted (2010)
The Failure of Linear OneParameter Scaling TheoryThe Failure of Linear OneParameter Scaling Theory The Failure of Linear OneParameter Scaling TheoryThe Failure of Linear OneParameter Scaling Theory
Bodyfelt, Kottos, & Shapiro, Phys. Rev. Lett., submitted (2010)
≠c1c
ln
ln g
g=N
Nref ;=
∞Nref
Setting NonlinearSetting Nonlinear References Localization LengthReferences Localization Length Setting NonlinearSetting Nonlinear References Localization LengthReferences Localization Length
∞ Needs
N
Bodyfelt, Kottos, & Shapiro, Phys. Rev. Lett., submitted (2010)
b=4
Setting Nonlinear References Localization LengthSetting Nonlinear References Localization Length Setting Nonlinear References Localization LengthSetting Nonlinear References Localization Length
● Small Nonlinear Limit
E int=
2N
E int=✴
2∞0=1/∞0 ✴~1
● Large Nonlinear Limit
∞
∞0'boxes'
E int / box=
2∞∞0∞
=1/∞0
∞~∞0
SettingSetting Nonlinear References Localization LengthNonlinear References Localization Length SettingSetting Nonlinear References Localization LengthNonlinear References Localization Length
Bodyfelt, Kottos, & Shapiro, Phys. Rev. Lett., submitted (2010)
∞
∞0
∞≃∞01a0
Setting Nonlinear References – Full ErgodicSetting Nonlinear References – Full Ergodic Setting Nonlinear References – Full ErgodicSetting Nonlinear References – Full Ergodic
y ∈ { N ∣n∣; n=1,2,. ..N }● Linear Case
M=∫ y2P ydy=1/NS=−∫ P y ln P y dyMaximize entropy:
Under the constraint:
Gaussian DistributionP y Nref 0=N /3
● Nonlinear Case
Minimize free energy: F [P ]=−SE intAM
P y =C exp −Ay2− y4
2 N
ref 0=N
Setting Nonlinear References – Full ErgodicSetting Nonlinear References – Full Ergodic Setting Nonlinear References – Full ErgodicSetting Nonlinear References – Full Ergodic
Nref=N ; 1 /3≤≤1
Bodyfelt, Kottos, & Shapiro, Phys. Rev. Lett., submitted (2010)
Constructing the Nonlinear OPSTConstructing the Nonlinear OPST Constructing the Nonlinear OPSTConstructing the Nonlinear OPST
Linear Nonlinear
g≃N
Nref g≃
N
Nref
x=∞
Nref
=∞Nref
x=c x1cx
=c1c
One Parameter Scaling Theory: Nonlinear CaseOne Parameter Scaling Theory: Nonlinear Case One Parameter Scaling Theory: Nonlinear CaseOne Parameter Scaling Theory: Nonlinear Case
ln x
ln g
x= c x1cx
;c~0.98
Bodyfelt, Kottos, & Shapiro, Phys. Rev. Lett., submitted (2010)
ConclusionConclusion ConclusionConclusion
➢ Nonlinear Scaling Theory Established
x=∞
Nref
x =c x1cx
for the Single Parameter
➢ Future Possibilities
● Nonlinear Scaling applied to Thouless Conductance
● Nonlinearity Effect on 3D MetalInsulator Transition
● Field Theories to Incorporate Nonlinearity?