PHY 411: Lecture Notes and Problems


Lectures Notes:

Homework:

Pylab-Python Code:

Lecture 1 Problem Set 1 pend_vec.ipynb pend_vec.html
phasewrap.ipynb phasewrap.html
Introduction, Equations of motion in one degree of freedom from Newton's laws, Hamiltonian and Lagrangian descriptions, Fixed points, Liouville's Theorem Code examples to plot stream lines or level curves and to look at phase wrapping
Lecture 2 Problem Set 2 harm_integrate.ipynb harm_integrate.html
Canonical transformations, Poisson brackets, Generating functions, The Symplectic form, The Jacobi constant, Symmetries and Conserved quantities, Noether's theorem Code example to compare a second order symplectic leapfrog integrator with a second order Runge-Kutta integrator.
Lecture 3 Problem Set 3 perio.ipynb perio.html
drift_integrate.ipynb drift_integrate.html
Keplermap.ipynb Keplermap.html
Resonances, small divisors, Poincare maps, Surfaces of section, The periodically forced pendulum and the restricted three-body problem Code examples to look at mappings (on the period) of the periodically varying pendulum, for a drifting Andoyer Hamiltonian and for the 2D Kepler map.
Lecture 4 Problem Set 4 cobweb.ipynb cobweb.html
logistic.ipynb logistic.html
lyap.ipynb lyap.html
One dimensional dynamical systems and interative maps, Bifurcations in one dimensional systems, Periodic orbits in maps, The Logistic map, Period doubling bifurcations, Lyapunov Exponent, Numerical estimates of the Maximal Lyapunov Exponent and related indicators Code examples to make cobweb plots identifying fixed points and periodic orbits of iteratively applied one dimensional maps, plot attracting periodic points of the logistic map or compute and plot Lyapunov exponents for a map.
Lecture 5 baker.ipynb baker.html
Symbolic dynamics, The Shift Map on Sigma_2, Devany's definition for a chaotic map, Two-dimensional ergodic systems, The Baker map, Topological conjugacy and Topological entropy. Code example to plot the orbits of the Baker map.
Lecture 14 Problem Set 14 Ripple_and_D_Billiard.ipynb Ripple_and_D_Billiard.html quantum_kicked_rotor.ipynb quantum_kicked_rotor.html
Quantum Chaos. Quantization of the kicked rotor. GUI vs Poisson energy level statistics. Anderson localization. Billiards. Wigner and Weyl representations for quantum mechanics in phase space. Coherent states. Discrete versions of coherent states. Semi-classical approximations. The quantized baker map. Code examples for billiards and quantum chaos
Jeremy's notes
Jeremy Couturier's lecture notes on Kozai Lidov and Evection resonances
Lecture 6 circle_map.ipynb circle_map.html
devilstair.ipynb devilstair.html
The sine-circle map, Arnold Tonques and the devil staircase. Ways to describe rational and irrational numbers: Diophantine approximation, Continued fractions, Farey sequence, and Pigeonholes. Code examples to plot winding numbers for the circle map and the devil staircase.
Lecture 7
Introduction to numerical integrators of ordinary differential equations. Symplectic integrators, Construction of symplectic integrators using exponentials of evolution operators, Force Gradient Algorith, Extended Phase Space and Regularization
Lecture 8 Problem Set 8
Continuous or infinite dimensional Hamiltonian systems, Examples with canonical coordinate fields, Hydrodynamics in Hamiltonian form, Changing coordinates and constructing a new Poisson bracket, Poisson manifolds, The KdV equation, Infinite conserved quantities, the LAX pair.
Lecture 9
Birkhoff normal form, The Hamilton-Jacobi equation, Hamiltonian Canonical Perturation theory
Lecture 10 Problem Set 10
Infinitesimal Transformations and Lie Groups. Locomotion of deformable bodies. Gauge Transformations of marching jello cubes. Rotations and Rigid Bodies. Euler's equations. Rotational stability of a freely rotating rigid body. Lagrangian and Hamiltonian descriptions of Rigid Bodies. Potential energy on a rigid body from an external force field.
Lecture 11
Equivalent Actions. Geometric view of Celestial mechanics. Maupertuis' principle. Equations of motion as geodesics.
Lecture 12 Problem Set 12
Mechanical Constraints. Holonomic and non-holonomic constraints. Lagrange d'Alembert principle vs Vakonomic dynamics. Geometric view of the falling cat. Control of mechanical systems.
Lecture 13
Classification of Fixed points of 2-dimensional dynamical systems. Hopf Bifurcation and birth of a limit cycle. Reaction-Diffusion equations and Turing instability for pattern formation. Spatial and temporal instability in the Brusellator model.
Lecture 14






jul.py Code example to look at a Julia set.