Guide to Quantum Mechanics Multimedia Resources Probabilistic analysis of classical systems; Classical versus quantum behaviour Particle in a Box - Classical versus Quantum system: http://webphysics.davidson.edu/qmbook/classical/cl_qm_infinite.html Gaussian wave packet in a Box - Classical versus Quantum system: http://webphysics.davidson.edu/qmbook/classical/position_gaussian_well.html Gaussian wave packet in a harmonic oscillator potential - Classical versus Quantum system: http://webphysics.davidson.edu/qmbook/classical/position_gaussian_sho.html Classical versus quantum mechanics – Exercises and Illustrations: http://webphysics.davidson.edu/physlet_resources/quantum/classical/default.html Wave packet bouncing on a hard surface under the influence of gravity: http://www.uark.edu/misc/julio/bouncing_ball/bouncing_ball.html Classical Probability Density of a mass-spring system: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=34 http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=40 The Photoelectric effect http://www.opensourcephysics.org/items/detail.cfm?ID=10272 http://phet.colorado.edu/en/simulation/photoelectric http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=23 Wave function and probability density Wave function and probability density: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/probillustrator.html Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Probability current Probability density and probability current http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=20 Free quantum particle Properties of the free particle - Exercises and Illustrations http://webphysics.davidson.edu/physlet_resources/quantum/free_particle/default.html Time evolution of a superposition of free particle energy eigenstates. A table shows the energy, momentum, and amplitude of each eigenstates. http://www.opensourcephysics.org/items/detail.cfm?ID=8108 Time evolution of a free (V = 0 everywhere) initial Gaussian wave packet in position and momentum space: http://www.opensourcephysics.org/items/detail.cfm?ID=6989 Free Gaussian wave packet: http://www.opensourcephysics.org/items/detail.cfm?ID=10271 Time-development of a free-particle Gaussian Wave Packet: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=1 Free-particle wave packet and Heisenberg Uncertainty Principle: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=10 Free-particle wave packet and Heisenberg Uncertainty Principle: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=10 Wave packets Properties of the free particle - Exercises and Illustrations http://webphysics.davidson.edu/physlet_resources/quantum/free_particle/default.html Time evolution of a free (V = 0 everywhere) initial Gaussian wave packet in position and momentum space: http://www.opensourcephysics.org/items/detail.cfm?ID=6989 Free Gaussian wave packet: http://www.opensourcephysics.org/items/detail.cfm?ID=10271 Time-development of a free-particle Gaussian Wave Packet: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=1 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Wave packet explorer: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/wpe.html Gaussian wave packet incident on a step or a barrier of potential: http://www.quantum-physics.polytechnique.fr/en/step.html Gaussian wave packet incident on a potential step: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=33 Time evolution of a two-dimensional wave packet as it moves towards a slit with an obstacle in it: http://www.opensourcephysics.org/items/detail.cfm?ID=10273 Wave packet bouncing on a hard surface under the influence of gravity: http://www.uark.edu/misc/julio/bouncing_ball/bouncing_ball.html Bouncing Wave Packet: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=9 Free-particle wave packet and Heisenberg Uncertainty Principle: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=10 Time evolution and momentum expectation value for a Gaussian wave packet in a harmonic potential. Other states and potentials can be specified. http://www.opensourcephysics.org/items/detail.cfm?ID=6809 Gaussian wave packet in a simple harmonic Oscillator potential: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=22 Wave Packet Revivals: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=43 Quantum noise of different freely propagating light waves and the corresponding moving wave packet in the harmonic potential: http://gerdbreitenbach.de/gallery/ Fourier Transforms Fourier transform of a user-defined complex spatial function of position: http://www.opensourcephysics.org/items/detail.cfm?ID=7063 Fourier transform of a user-defined complex spatial function of position and time: http://www.opensourcephysics.org/items/detail.cfm?ID=7064 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Evolution of a Gaussian wave function and its Fourier Transform http://webphysics.davidson.edu/qmbook/free_particle/demo_fft1.html Evolution of a square wave function and its Fourier Transform http://webphysics.davidson.edu/qmbook/free_particle/demo_fft2.html Momentum probability densities Time evolution of the wave function and the momentum probability density. Self-contained interactive learning package. http://www.opensourcephysics.org/items/detail.cfm?ID=7336 Momentum Probability Densities of energy eigenstates in the 1D infinite well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=5 Momentum probability density of a superposition state in the 1D infinite well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=14 Momentum probability density of a Gaussian wave packet in a simple harmonic Oscillator potential: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=22 Momentum probability densities for the energy eigenstates of the 2D infinite square well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=49 Uncertainty Principle Illustration of the uncertainly principle for momentum and position: http://www.7stones.com/Homepage/Publisher/QMuncert.html Wave Packets and the Heisenberg Uncertainty Principle: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=10 The 1D Infinite Square Well Energy levels and wave functions: http://webphysics.davidson.edu/physletprob/ch10_modern/default.html Time evolution of the position expectation value for the superposition of two states in the infinite square well. Other potentials can be specified: http://www.opensourcephysics.org/items/detail.cfm?ID=6807 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Time evolution of the n = 5 state in a ramped infinite square well. Additional states and other potential energy functions can be specified using the Display | Switch GUI menu item: http://www.opensourcephysics.org/document/ServeFile.cfm?ID=6799&DocID=288 Time dependence of a variety of superpositions of energy eigenfunctions for the infinite square well and harmonic oscillator potentials: http://www.opensourcephysics.org/items/detail.cfm?ID=8195 Expectation values for a particle in a 1D box. Interactive problems: http://webphysics.davidson.edu/physlet_resources/quantum/expectation/default.html Time-independent superposition of states: http://webphysics.davidson.edu/qmbook/superposition/demo_superposition.html Time-dependent superposition of states: http://webphysics.davidson.edu/qmbook/time_evolutionA/superposition_hup.html Time evolution of a superposition wave function. Interactive exercises: http://webphysics.davidson.edu/physlet_resources/quantum/time_evolutionA/default.html http://webphysics.davidson.edu/physlet_resources/quantum/time_evolutionB/default.html Time-dependent Superposition and Expectation Values: http://webphysics.davidson.edu/physlet_resources/quantum/time_evolutionB/superposition_hup.h tml Expansion in eigenstates: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=28 Superposition of states: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=24 1D Superposition of States Two-state superposition of harmonic oscillator states. Additional states and other potential energy functions can be specified: http://www.opensourcephysics.org/document/ServeFile.cfm?ID=6798&DocID=287 Time evolution of the position expectation value for the superposition of two states in the infinite square well. Other potentials can be specified: http://www.opensourcephysics.org/items/detail.cfm?ID=6807 The Phase Matters Package: http://www.opensourcephysics.org/items/detail.cfm?ID=7334 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Time evolution and visualization of energy eigenstates and their superposition: http://www.opensourcephysics.org/items/detail.cfm?ID=7295 Time evolution and visualization of energy eigenstates and their superposition via momentum space: http://www.opensourcephysics.org/items/detail.cfm?ID=7304 Time dependence of a variety of superpositions of energy eigenfunctions for the infinite square well and harmonic oscillator potentials: http://www.opensourcephysics.org/items/detail.cfm?ID=8195 Time evolution on quantum-mechanical bound states using a Reduced Hilbert approach: http://www.opensourcephysics.org/document/ServeFile.cfm?ID=6475&DocID=273 Quantum Mechanics Projection program: Time evolution of the positionspace wave function calculated by projecting an initial wave function into the known Hilbert space of energy eigenfunctions, determining expansion coefficients, and then calculating the energy eigenfunction superposition: http://www.opensourcephysics.org/items/detail.cfm?ID=7010 Superposition of states for a particle in a 1D box. Interactive exercises: http://webphysics.davidson.edu/physlet_resources/quantum/superposition/default.html Quantum superposition in one dimension: http://www.quantum-physics.polytechnique.fr/en/pages/p03t.html Fourier waves: http://phet.colorado.edu/en/simulation/fourier Time evolution of the wave function and the momentum probability density. Self-contained interactive learning package. http://www.opensourcephysics.org/items/detail.cfm?ID=7336 Quasi-probability distribution Wigner quasi-probability distribution for position and momentum: http://www.opensourcephysics.org/items/detail.cfm?ID=7302 Time evolution of the position-space wave function and the associated quasi-probability distribution in phase space via the Wigner function: http://www.opensourcephysics.org/items/detail.cfm?ID=6813 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 The Finite Well 1D finite square well and periodic square wells. Interactive exercises: http://webphysics.davidson.edu/physlet_resources/quantum/finite/default.html Energy levels and wave functions: http://webphysics.davidson.edu/physletprob/ch10_modern/default.html Comparison of Infinite and Finite Well energy eigenstates: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=18 Determination of the Finite Well energy eigenvalues: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=19 Other 1D potentials Time evolution of the position expectation value for the superposition of two states in the infinite square well. Other potentials can be specified: http://www.opensourcephysics.org/items/detail.cfm?ID=6807 Eigenstate superposition model: http://www.opensourcephysics.org/items/detail.cfm?ID=7945 Energy eigenvalues and eigenfunctions for a particle confined to a potential well with hard walls at -a/2 and a/2 and a smooth potential energy function between these walls: http://www.opensourcephysics.org/document/ServeFile.cfm?ID=11612&DocID=2509 Time evolution of probability density for a particle confined to a ring http://www.physics.oregonstate.edu/portfolioswiki/doku.php?id=activities:main&file=cfqmring Wave function shapes and probability density for a variety of potentials: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=28 The 1D Harmonic Oscillator Simple Harmonic Oscillator eigenvalues: http://webphysics.davidson.edu/Applets/Eigenvalue4/SHO.html Comparisons of the classical and quantum Simple Harmonic Oscillator: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=4 Simple harmonic oscillator: probability distributions for kinetic and potential energy: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=6 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Time dependence of a variety of superpositions of energy eigenfunctions for the infinite square well and harmonic oscillator potentials: http://www.opensourcephysics.org/items/detail.cfm?ID=8195 Solution to the time-independent Schrödinger equation determined via the shooting method: http://www.opensourcephysics.org/document/ServeFile.cfm?ID=6987&DocID=336 Gaussian wave packet in a Harmonic Oscillator potential: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=22 Comparison of harmonic oscillator and Half Harmonic Oscillator eigenstates: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=27 Bound states in other 1D potentials Kronig-Penney Model: All Energies: http://webphysics.davidson.edu/physlet_resources/quantum/finite/demo_periodic1.html http://webphysics.davidson.edu/physlet_resources/quantum/finite/demo_periodic2.html Single particle in bound states in one dimension: http://www.falstad.com/qm1d/ Energy bands in a 1D periodic potential (1D quantum crystal): http://www.falstad.com/qm1dcrystal/ Quantum bound states in potential wells: http://phet.colorado.edu/en/simulation/bound-states Symmetry of the potential well and wave function: http://webphysics.davidson.edu/qmbook/wave_functions/demo_gravity_abs.html Asymmetric infinite square well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=8 Comparison of harmonic oscillator and Half Harmonic Oscillator eigenstates: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=27 Time-independent perturbation theory Symmetric Perturbation in an infinite well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=12 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Asymmetric Perturbation in an infinite well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=13 Degenerate Perturbation Theory: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=25 http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=26 The sudden approximation Expanding Infinite Well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=35 The Dissolving 1D infinite square well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=37 Tritium Decay: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=38 Measurement and wave function collapse Quantum-mechanical measurement of momentum. The default wave function is an equal-mix four-state superposition in the infinite square well: http://www.opensourcephysics.org/items/detail.cfm?ID=6822 Quantum-mechanical measurement of position. The default wave function is an equal-mix four-state superposition in the infinite square well: http://www.opensourcephysics.org/items/detail.cfm?ID=6821 Quantum-mechanical measurement of energy. The default wave function is an equal-mix four-state superposition in the infinite square well: http://www.opensourcephysics.org/items/detail.cfm?ID=6815 Quantum-mechanical measurements of energy, position, and/or momentum: http://www.opensourcephysics.org/items/detail.cfm?ID=6814 Measurement of energy, position and momentum: http://www.opensourcephysics.org/items/detail.cfm?ID=9773 The double slit experiment and the collapse of the wave function: http://www.fen.bilkent.edu.tr/~yalabik/applets/collapse.html Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Successive energy measurements: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=7 Quantum wave interference Fraunhofer diffraction through single or multiple slits: http://www.opensourcephysics.org/items/detail.cfm?ID=8331 Double slit, builds up interference pattern on the detector screen: http://www.opensourcephysics.org/document/ServeFile.cfm?ID=11546&DocID=2469 Single slit diffraction with various particles: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/singleslit.html Double slit diffraction with various particles: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/doubleslit/index.html Interference of two wave sources: http://perg.phys.ksu.edu/vqmorig/programs/java/makewave/index.html Simulation of the double slit experiment with particles: http://www.ianford.com/dslit/ http://www.quantum-physics.polytechnique.fr/en/pages/p01t.html Single slit diffraction: http://www.physics.uoguelph.ca/applets/Intro_physics/kisalev/java/slitdiffr/index.html The double slit experiment and the collapse of the wave function: http://www.fen.bilkent.edu.tr/~yalabik/applets/collapse.html Double slit, wave-particle duality and measurement: http://phet.colorado.edu/en/simulation/quantum-wave-interference Quantum bomb detection (Mach-Zehnder Interferometer): http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=39 Electron diffraction Davisson-Germer experiment: http://phet.colorado.edu/en/simulation/davisson-germer Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Quantum Transitions Radiative transitions in one dimension (infinite well, double well and H.O.): http://www.falstad.com/qm1drad/ Atomic dipole transitions: http://www.falstad.com/qmatomrad/ One-dimensional scattering Time evolution of a plane wave incident on a Dirac delta function barrier: http://www.opensourcephysics.org/items/detail.cfm?ID=6990 Quantum mechanical experiment in which an incident wave (particle) traveling from the left is transmitted and reflected from a potential step: http://www.opensourcephysics.org/items/detail.cfm?ID=8157 1D quantum scattering-state wave function and its time evolution for an arbitrary potential V(x) on the interval [xmin,xmax]: http://www.opensourcephysics.org/items/detail.cfm?ID=10220 Plane wave scattering at a potential step: http://www.opensourcephysics.org/items/detail.cfm?ID=10534 Gaussian wave scattering at a potential step: http://www.opensourcephysics.org/items/detail.cfm?ID=10535 Gaussian wave onto six different potentials: http://www-ekp.physik.uni-karlsruhe.de/~feindt/schrodinger/Introduction.htm Energy of a plane wave through potential steps and double barriers: http://webphysics.davidson.edu/qmbook/barriers/default.html A plane wave encounters an increase in potential energy: http://webphysics.davidson.edu/physlet_resources/quantum/barriers/demo_barrier_up1.html A plane wave encounters a decrease in potential energy: http://webphysics.davidson.edu/physlet_resources/quantum/barriers/demo_barrier_down1.html A plane wave encounters a potential energy barrier: http://webphysics.davidson.edu/physlet_resources/quantum/barriers/demo_barrier_barriers1.html A plane wave encounters two barriers in potential energy: http://webphysics.davidson.edu/physlet_resources/quantum/barriers/demo_barrier_2barriers1.ht ml Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 A plane wave encounters a potential energy well: http://webphysics.davidson.edu/physlet_resources/quantum/barriers/demo_barrier_wells1.html A plane wave encounters two wells in potential energy: http://webphysics.davidson.edu/physlet_resources/quantum/barriers/demo_barrier_2wells1.html A plane wave encounters two steps in potential energy: http://webphysics.davidson.edu/physlet_resources/quantum/barriers/demo_barrier_2step1.html Wave through potential barrier/well: http://webphysics.davidson.edu/Applets/Barrier/WaveMap.html http://webphysics.davidson.edu/physlet_resources/quantum/barriers/default.html Gaussian wave packet when it hits a step or a barrier of potential: http://www.quantum-physics.polytechnique.fr/en/step.html Potential Step: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=15 http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=33 Quantum Tunneling: http://phys.educ.ksu.edu/vqm/html/qtunneling.html http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=16 Double well and covalent bonds: http://phet.colorado.edu/en/simulation/covalent-bonds Quantum Tunneling and Wave Packets: http://phet.colorado.edu/en/simulation/quantum-tunneling Scattering on a Finite Well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=17 Scattering by Yukawa and Coulomb potentials: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=44 3D scattering experiments Rutherford Scattering http://phet.colorado.edu/en/simulation/rutherford-scattering Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 The 2D Infinite Square Well Wave function in a 2D square well: http://webphysics.davidson.edu/qmbook/two_d/two_d1.html http://webphysics.davidson.edu/qmbook/two_d/two_d2.html 2D Square Well, various interactive exercises: http://webphysics.davidson.edu/physlet_resources/quantum/two_d/default.html 2D infinite square well energy eigenfunctions: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=2 2D Superposition of States Quantum superposition in two dimensions: http://www.quantum-physics.polytechnique.fr/en/pages/p04t.html Time evolution of the two-dimensional position-space wave function using colour to represent its phase: http://www.opensourcephysics.org/items/detail.cfm?ID=7180 Quantum superposition in a 2D infinite square well: http://www.quantum-physics.polytechnique.fr/en/pages/p04t.html The 2D Harmonic Oscillator 2D Quantum Harmonic Oscillator: http://www.falstad.com/qm2dosc/ 2D Simple Harmonic Oscillator energy eigenfunctions: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=11 Bound states in 2D potentials Time evolution of the two-dimensional position-space wave function using colour to represent its phase: http://www.opensourcephysics.org/items/detail.cfm?ID=7180 Time evolution of the two-dimensional probability density using colour to represent its magnitude: http://www.opensourcephysics.org/items/detail.cfm?ID=7181 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Time evolution of the position-space wave function in an deep 2D circular well: http://www.opensourcephysics.org/items/detail.cfm?ID=8327 2D energy eigenstates of a particle trapped in a very deep two-dimensional circular well: http://www.opensourcephysics.org/items/detail.cfm?ID=9639 Energy eigenstates for a particle in a 2D infinite rectangular well: http://www.opensourcephysics.org/items/detail.cfm?ID=9636 Time evolution of the wave function in an infinite 2D rectangular well using a superposition of energy eigenfunctions Ψn,m(x,y) with eigenvalues En,m: http://www.opensourcephysics.org/items/detail.cfm?ID=9637 Periodic potentials in two dimensions: http://www.falstad.com/qm2dcrystal/ 2D rectangular square well: http://www.falstad.com/qm2dbox/ 2D circular square well: http://www.falstad.com/qm2dcirc/ 2D infinite Circular Well energy eigenfunctions: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=21 Energy eigenstates of the 2D triangular infinite well: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=46 The 3D Harmonic Oscillator 3D Quantum Harmonic Oscillator: http://www.falstad.com/qm3dosc/ Hydrogen atom Bohr’s model with extension to elliptical orbits: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=32 Models of the hydrogen atom: http://phet.colorado.edu/en/simulation/hydrogen-atom Hydrogen spectroscopy: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/h2spec.html Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 2D wave functions for Coulomb Potential: http://webphysics.davidson.edu/qmbook/two_d/Hydrogenic.html Radial and angular wave functions: http://webphysics.davidson.edu/physletprob/ch10_modern/default.html Radial energy eigenfunctions and probability densities for Hydrogen-like atoms: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=50 Orbitals of the Hydrogen atom: http://www.falstad.com/qmatom/ 3D Hydrogen atom probability densities (n,l,m) for n=1,2,3: http://www.opensourcephysics.org/items/detail.cfm?ID=10532 Molecular orbitals of hydrogen molecular ion (H2+) in 3-D: http://www.falstad.com/qmmo/ Spin and angular momentum Single and multiple measurements of different ensembles of identically prepared spin-1/2 particles: http://www.opensourcephysics.org/items/detail.cfm?ID=7329 Simulation showing the result of measuring the z component of spin on a beam of spin-1/2 particles with a random (or statistical) mixture of spins orientations: http://www.opensourcephysics.org/items/detail.cfm?ID=7011 Model for the magnetic resonance of spin one-half particles: http://www.opensourcephysics.org/items/detail.cfm?ID=10072 A series of applets including: spin 1/2, Larmor precession, magnetic resonance, and spin echo. http://www.quantum-physics.polytechnique.fr/ Illustration and explanation of quantized angular momentum: http://www.shermanlab.com/xmwang/myGUI/AngQMBt.html Stern Gerlach experiment: http://phet.colorado.edu/en/simulation/stern-gerlach http://www.if.ufrgs.br/~betz/quantum/SGPeng.htm Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Successive Stern Gerlach Experiments: http://physics.oregonstate.edu/~mcintyre/ph425/spins/index_SPINS_OSP.html http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=42 Simplified MRI: http://phet.colorado.edu/en/simulation/mri Magnetic resonance of spin one-half particles: http://www.compadre.org/quantum/document/ServeFile.cfm?ID=10072&DocID=1669 Spin Chain: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=29 Spin Cluster: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=30 Vector Model of Angular Momentum: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=47 2D infinite Circular Well energy eigenfunctions: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=21 Wave function of the rigid rotor (spherical harmonics): http://www.falstad.com/qmrotator/ 3D plots of Spherical Harmonics (YLM): http://www.vis.uni-stuttgart.de/~kraus/LiveGraphics3D/java_script/SphericalHarmonics.html Spherical Harmonics (vary l and m to plot the angular probability density): http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=45 Multi-particle wave functions Non-interacting particles in a 1D infinite square well http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=3 http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=48 Atomic structure, quantization of energy levels and spectroscopy Formation mechanism for an emission spectrum and an absorption spectrum for Hydrogen, Helium, and Oxygen: http://sci2.esa.int/interactive/media/applets/2_5_1.htm Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Energy band creator: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/eband.html Atomic orbitals: http://micro.magnet.fsu.edu/electromag/java/atomicorbitals/ Emission spectra for atomic gases: http://phys.educ.ksu.edu/vqm/html/emission.html Absorption spectra for atomic gases: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/absorption.html Fluorescence spectroscopy: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/fluorescence.html Phosphorescence: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/phosphorescence.html Franck-Hertz Experiment: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/FranckHertz.html Discharge lamps: http://phet.colorado.edu/en/simulation/discharge-lamps Zeeman Effect http://perg.phys.ksu.edu/vqm/software/online/vqm/html/zeemanspec.html Density Matrix Density matrix for a two-level Spin System: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=41 Quantum information Deutsch-Josza algorithm: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=31 Quantum bomb detection: http://www.st-andrews.ac.uk/~qmanim/embed_item_3.php?anim_id=39 Conductivity Experiment with conductivity in metals, plastics and photoconductors: http://phet.colorado.edu/en/simulation/conductivity Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Dope the semiconductor to create a diode: http://phet.colorado.edu/en/simulation/semiconductor Band structure: http://phet.colorado.edu/en/simulation/band-structure Light sources Incandescence lamp: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/incandescence.html LED constructor http://perg.phys.ksu.edu/vqm/software/online/vqm/html/ledcons.html LED spectra and operation: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/led.html Diode Laser: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/diodelaser.html He-Ne Laser: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/henelaser.html Ruby Laser: http://perg.phys.ksu.edu/vqm/software/online/vqm/html/rubylaser.html Create a laser by pumping the chamber with a photon beam: http://phet.colorado.edu/en/simulation/lasers Complex and special functions Displays a user-defined complex function of position and time using representations that map phase into colour: http://www.opensourcephysics.org/items/detail.cfm?ID=7065 Legendre and Laguerre polynomials, Bessel functions and other special functions model: http://www.opensourcephysics.org/items/detail.cfm?ID=8384 Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012 Collection of topics: Set of applets featuring illustrations of quantum mechanics through interactive animations in the following domains: Young interference fringes – Wave packet propagation - Linear superposition of eigenstates - Nuclear magnetic resonance: http://www.quantum-physics.polytechnique.fr/ Antje Kohnle and Giuseppe Smirne, University of St Andrews, 2012