Compendium of Quantum Physics	Article Length[1]	Contributor
Article	medium
Aharonov-Bohm Effect Aharonov-Caher Effect	short	Holger Lyre (Bonn), submitted
		Daniel Rohrlich (Waizmann Institute) submitted
Algebraic Quantum Mechanics, see Quantum Mechanics
Angular Momentum, see Spin	short
Annihilation operator; see operators
Anti-particle, see Particle Physics, relativistic quantum mechanics
Anyons	medium	J. M. Leinaas (Oslo), submitted
Alternate Statistics, see Generalizations of Quantum Statistics	medium	O. W. Greenberg, (U. of Maryland), submitted
Aspect Experiment	medium	T. Leggett (Illinois), submitted
Atom models o Bohr atom model o Nagaoka model (Saturn model) o Thomson model (Plum pudding model) o Rutherford model (Nucleus model) Nuclear Models	medium Short Short to medium  medium medium	A. Schirrmacher (Munich), submitted Klaus Hentschel (Bern), submitted Klaus Hentschel (Stuttgart, submitted John Heilbron (Berkeley), submitted  Brigitte Falkenburg (Dortmund), submitted
Bell’s theorem/ Bell’s theorem without Inequalities (see GHZ states, Hardy experiment) Bell inequalities, see also Inequalities in Quantum Mechanics	long	T. Leggett (Illinois), submitted
Berry’s phase	medium	D. Rohrlich, submitted
BKS theory	medium	H. Kragh (Aarhus), submitted
Black Body	medium	Dieter Hoffmann (Max Planck Institute for History of Science, Berlin), submitted
Black-body radiation	medium	Clayton A. Gearhart (Collegeville), submitted
Bohm-Aharonov experiment see Aharonov-Bohm Effect		H. Lyre (Bonn)
Bohm’s experiment/spin model, see Pilot Waves		B. Hiley (London) submitted
Bohmian Mechanics	medium	S. Goldstein et al. (Rutgers), submitted
Bohr Magneton, see quantum numbers, spin
Born Rule	short	N. P. Landsman (Nijmegen) submitted
Born’s probability interpretation, see Interpretations of Quantum mechanics (probability interpretation)		N. P. Landsman (Nijmegen) submitted
Bose-Einstein condensation (and many-particle states)	medium	T. Leggett (Illinois), submitted
Bose-Einstein statistics, see Quantum statistics	medium	Arianna Borrelli (MPIWG, Berlin) submitted
Bosons, see Particle Physics
bra-ket vectors, see Dirac notation
Bremsstrahlung	short	Bruce Wheaton (Albany), submitted
Broglie wavelength/Broglie l	Short to medium	Bruce Wheaton (Albany), submitted
Brownian Motion	medium	Ch. Bigg (Berlin), submitted
Braking-radiation, see Bremsstrahlung
Bub-Clifton Theorem	short	Jeffrey Bub (Maryland) submitted
Bucky Ball scattering, see Mesoscropic Quantum Effects
Casimir Effect	short	Peter Milonni, Los Alamos Nat'l Lab.(LANL)/Umar Mohideen (Univ California Riverside)submitted
Cathode Rays	medium	Theodore Arabatzis (Athens), submitted
Causation in EPR Correlations, see also Indeterminism and Causality in QM	medium	Mauricio Suarez (Madrid) submitted
Cluster states	short	Hans Briegel (Innsbruck) submitted
Coherent states	short	Peter Milonni, Los Alamos Nat'l Lab.(LANL) and Michael Martin Nieto (Los Alamos National Laboratory) submitted
Collapse of wave function, see Wave function, Interpretations of Quantum mechanics
Complementarity Principle	medium	Henry Stapp(Lawrence Berkeley Lab), submitted
Commuting, non-commuting operators, see Operators
Complex Conjugate Numbers	short	R. Tumulka (Rutgers)submitted
Compton Effect, Scattering		Friedel Weinert (Bradford, submitted
Consistent Histories, see also Interpretations of Quantum Mechanics		R. B. Griffiths (Pittsburgh), submitted
Copenhagen Interpretation, see Interpretations of Quantum Mechanics
CPT theorem	medium	Claus Kiefer (Cologne), submitted
Correlations in Quantum Mechanics		Richard Healey, (Arizona), submitted
Correspondence Principle	medium	Brigitte Falkenburg submitted
Covariance	short	K. Mainzer (Munich) , submitted
Counterfactuals in QM	short	L. Vaidman (Tel Aviv), submitted
Colour in Hadronic Physics		O. W. Greenberg, (U. of Maryland), submitted
Creation Operator, see operators
Davisson-Germer Experiment	medium	Friedel Weinert (Bradford)submitted
De Broglie l, see Broglie l; see matter waves
Decay Law, see Radioactive Decay Law
Decoherence Decoherence time Decoherence and thermodynamics Dissipation	long	E. Joos (Heidelberg) submitted
Decoherence, experimental observation of  (Cavity QED, Fullerenes, Squids, Nano-electromechanical systems)	long	M. Schlosshauer (Melbourne) submitted
Degeneracy – Degenerated Observables	short	Daniel Greenberger (CCNY), submitted
Delayed-Choice Experiment	medium	T. Leggett (Illinois), submitted
Density Matrix, see also  States, pure and mixed, and their representation	short	Leslie Ballentine (Simon Frazer), submitted
Determinism see Indeterminism in QM	long
Diffeomorphism invariance, see Covariance	short	Christian Heinicke, (Cologne) submitted
Dirac equation	Medium to short	Helge Kragh (Aarhus) submitted
Dirac notation	short	R. Tumulka (Rutgers) submitted
Dissipation, see Decoherence	short
Double-slit experiment In classical electrodynamics In quantum mechanics see also which-way experiments		G. Jaeger (Boston), submitted
Effect (Ludwig)		Paul Busch, (York) submitted
Ehrenfest theorem, see quasi-classical limit	short	E. Joos, submitted
Eigenstate, see operators	short
Eigenvalue, see operators	short
Einstein locality, see locality, nonlocality see QFT	Medium	H. Stapp (Lawrence Berkeley Lab), submitted
Electrons	medium	Theodore Arabatzis (Athens), submitted
Electron-Interferometry experiments	medium to long	J. Spence (Arizona)submitted
Elitzur-Vaidman Bomb Argument or Interaction-free Measurement	short	L. Vaidman (Tel Aviv) submitted
Ensemble in QM		Leslie Ballentine (Simon Frazer), submitted
Entanglement Entropy of entanglement Quantum Entropy Entanglement, creation and detection Entanglement, purification and distillation Entangled States History of entangled states in QM (atomic models, Pauli principle) Entangled states and Ion traps	medium medium medium to long	Peter Mittelstaedt submitted (systematic)  D. Janzing (Q Information aspects) (University of Karlsruhe), submitted Dagmar Bruss (Düsseldorf)submitted
Entropy in QM	medium	D. Jenzing (Q Information aspects) (University of Karlsruhe), submitted
EPR Problem/Thought Experiment		Peter Mittelstaedt (Cologne) submitted
Errors and Paradoxes in Quantum Mechanics	long	D. Rohrlich (Waizmann Institute), submitted
Exclusion Principle, see Pauli Exclusion Principle
Expectation values, see probability interpretation
Experiments in QM, see separate entries · Aspect experiment · Davisson-Germer ·  experiment · Double-slit experiment · Electron-Interferometry ·  experiments · Hardy experiment · Franck-Hertz experiment · Hardy Experiment · Interaction-free experiment · Neutron-Interferometry · experiments · One-photon-experiment (low-intensity beams, laser beams, Fock states) · Quantum jumping experiment Spin-echo experiments · Stern-Gerlach experiment · Which-way experiment · History of experminetal testing (Clauser-Freedman, Aspect, modern tests) · Loopholes in experiments (efficiency, random sampling) See also Scattering Experiments
Fermi-Dirac statistics		Simon Saunders (Oxford), submitted
Fermions, see Particle Physics	medium
Feynman Diagrams, see path integral	Medium to long	David Kaiser (MIT) (history) submitted
Fine Structure constant 1/137	short	Helge Kragh (Aarhus) submitted
Fission, nuclear, see Nuclear fission	medium
Franck-Hertz Experiment	medium	Friedel Weinert (Bradford)submitted
Functional Integration, Path Integrals	medium	C. DeWitt (Texas, Austin), submitted
g-factor see Landé’s g-factor
Gauge symmetry {Gauge invariance/theory}	Medium to long	Holger Lyre (Bonn) submitted
Generalizations of Quantum Statistics		O. W. Greenberg, (U. of Maryland), submitted
GHZ States, see Quantum States		D. Greenberger (New York) submitted
Gleason Theorem	short	C. Held (Erfurt), submitted
Golden numbers, see quantum numbers
Grover’s searching (or sorting) algorithm, see Quantum Information
Hardy Paradox	Short-medium	A. Acin (Barcelona), submitted
Hamiltonian, see operators
Heisenberg’s uncertainty relations, see indeterminacy relations
Heisenberg’s microscope	short	M. Breinig (Tennessee), submitted
Heisenberg picture	short	M. Breinig (Tennessee), submitted
Hermitian operators/matrices, see operators
Hidden Variables, see also Interpretations of Quantum Mechanics (Bohm), Bohmian Mechanics	medium	B. Hiley (London, Birkbeck) submitted
Hidden-variable models of QM (Contextual/Non-contextual)	short	A. Shimony (Boston), submitted
Hilbert space, see also Rigged Hilbert space	medium	Erhard Scholz, (Wuppertal) submitted
Holism in Quantum Mechanics	medium	Richard Healey (Arizona), submitted
Hydrogen atom, see Atom models
Identity of quantum particles, see also Metaphysics		Simon Saunders (Oxford), submitted
Indeterminacy relations (uncertainty relations)	short	Paul Busch (York)/Brigitte Falkenburg (Dortmund ) submitted
Indeterminism and Determinism in QM	Long	Brigitte Falkenburg (Dortmund)/Friedel Weinert (Bradford, submitted
Indistinguishability		Nick Huggett/Tom Imbo (Chicago) submitted
Inequalities (Bell, Ch, CHSH), see Bell Inequalities
Information, see Quantum Information		M. Le Bellac (Nice) submitted
Interactions (weak, strong), see Particle Physics
Interaction-free experiments/ Quantum Interrogation	medium	P. Kwiat (Illinois), submitted
Interpretations of quantum mechanics
Bohm’s hidden variable interpretation/pilot waves	medium	Basil Hiley (London) submitted
Bohmian mechanics	medium	Sheldon Goldstein (Rutgers), submitted
Consistent Histories		Robert B. Griffith, (Pittsburgh), submitted
Copenhagen interpretation	Medium to long	Brigitte Falkenburg?
GRW Theory		Roman Frigg (LSE), submitted
Ignorance Interpretation	medium	Peter Mittelstaedt (Cologne) submitted
Ithaca Interpretation	Short to medium	J. A. Barrett (University of California at Irvine), submitted
Many worlds interpretation	medium	J. A. Barrett (University of California at Irvine), submitted
Minimal Interpretation, see Probability Interpretation
Modal Interpretation	medium	Meir Hemmo (Haifa), submitted
Orthodox Interpretation	medium	Henry Stapp, submitted
Probabilistic Interpretation, see Born Rule	medium	Brigitte Falkenburg (Dortmund)/ Peter Mittelstaedt (Cologne) submitted
Transactional                          Interpretation	medium	John G. Cramer (Seattle), submitted
Invariance, see Covaraince		K. Mainzer (Munich), submitted
jj coupling	short	K. Hentschel (Bern), submitted
Kaluza-Klein model		Daniela Wünsch (Goettingen) submitted
KdV equation, see Solitons
Key errors/misunderstandings in Quantum Mechanics, see Errors
Klein-Gordon Equation, see relativistic quantum mechanics/Dirac equation/Solitons/Schroedinger equation
Kochen-Specker theorem	medium	C. Held (Erfurt), submitted
Landé’s g-factor	short	K. Hentschel (Bern), submitted
Large-angle scattering (Rutherford, Geiger, Marsden)	medium	B. Falkenburg (Dortmund)submitted
Light-quantum	long	Klaus Hentschel (Bern) submitted
Locality, see Nonlocality	short	H. Stapp (Lawrence Berkeley Lab), submitted
Loopholes in experiments	medium	G. Weihs (Waterloo), submitted
Loop Quantum Gravity, see Quantum Gravity
Lüder’s Rule	short	Paul Busch (York)/Pekka Lahti (Turku), submitted
Mach-Zehnder Interferometer, see Consistent Histories
Macroscopic quantum effects See Decoherence, experimental observation of See Superconductivity, Superfluidity	long	M. Schlosshauer  (U. Melbourne), submitted
Magnetic Resonance	short	A. Weis (Fribourg), submitted
Many particle physics/theory, see Particle Physics
Matter Waves	medium	B. Wheaton (Albany) submitted
Matrix Mechanics	medium	Henry Stapp submitted
Measurement theory	long	P. Busch (York)P. Lahti (Turku) submitted
Measurements, see protective, weak measurements
Mesoscopic Quantum Effects (Scattering bucky balls etc.)	medium	Markus Arndt (Vienna), submitted
Metaphysics in Quantum Mechanics. See Interpretations		Craig Callender (California, San Diego) submitted
Mixture mixed state (see also States in Q)	short	P. Mittelstaedt (Cologne) submitted
Mixing and oscillation of particles, see Particle Mixing
Models semi-classical, quantum mechanical	long	Markus Arndt (Vienna), submitted
Multiplets, see quantum numbers, spectroscopy, spin
Neutron Interferometer	short	H. Rauch (Innsbruck), submitted
Neutrino Mixing, see Particle Physics
Nonlocality	Medium to long	H. Stapp (Lawrence Berkeley Lab), submitted
No-cloning theorem	short	St. Weigert (York), submitted
Nuclear fission	medium	Hanne Andersen (Aarhus) submitted
Nuclear models, see Atom models,	medium
Nucleus Model, see Atom models, Rutherford
Objectification	short	Peter Mittelstaedt (Cologne) submitted
One and two photon interference experiment	medium	Paul Kwiat (Illinois), submitted
Ontology, see Metaphysics, Identity
Observables Commuting, non-commuting, generalized, joint See also Operators	medium	Pekka Lahti (Turku)/Paul Busch (York) submitted
Operators Annihilation Creation Hamiltonian Density Self-adjoint & Hermitian Projection unitary See also Observables	medium medium	C. Witte (Berlin), submitted W. Stulpe (Aachen), submitted
Orthonormal basis	short	R. Tumulka (Rutgers)submitted
Parity	medium	A. K. Wroblewski (Warsaw), submitted
Particle Mixing and oscillations	medium	A. K. Wroblewski (Warsaw), submitted
Particle physics - virtual particles	medium - long	Kim Milton (Oklahoma), submitted
Particle Tracks	long	Brigitte Falkenburg submitted
Parton Model	medium-long	O. W. Greenberg, (U. of Maryland), submitted
Paschen-Back Effect	short	K. Hentschel, submitted
Path Integrals and Functional Integration	medium	C. DeWitt (Texas, Austin), submitted
Pauli exclusion principles, see quantum numbers; spin	medium	M. Massimi (London), submitted
Pauli spin matrices	short	R. Tumulka (Rutgers)submitted
Photons, see Particle Physics, Light quantum
Photoelectric effect	medium	Bruce Wheaton (Albany), submitted
Pilot Waves, see also Bohmian Mechanics	medium	B. Hiley (London) submitted
Planck’s Constant	medium	D. Hoffmann (Berlin) submitted
Plum Pudding Model, see Atom models (Thomson model)
Problem of Measurement, see  Wave function Collapse, Measurement Theory, Interpretations of QM, Probability Interpretation
Propensities in QM Probability in Quantum Mechanics: objective probabilities	medium medium	M. Suarez (Madrid), submitted A. Shimony, submitted Storrs McCall, submitted
Projection Postulate, see Wave function	medium	S. Goldstein (Rutgers), submitted
Projector Operator, see Operator	short
Protective measurements	short	L. Vaidman (Tel Aviv), submitted
Pure state, mixed state, mixture , see states, mixture		Peter Mittelstaedt (Cologne) submitted
Quantization, systematic Quantization, historical	Medium short	N. P. Landsman (Nijmegen) submitted H. Kragh, submitted
Quantum Chemistry	long	Ana Simoes (Lisboa) submitted
Quantum Chaos	medium	St. Weigert (York), submitted
Quantum Cloning, see Nocloning Theorem
Quantum Eraser	medium	B. Hiley (London), submitted
Quantum Field Theory	long	Frank Wilczek (MIT) submitted
Quantum gravity (general) and applications	long	Claus Kiefer (Cologne), submitted
Quantum Hall Effect	long	Rolf R. Gerhardts, J. Weis, and Klaus von Klitzing (Max-Planck-Institut  Stuttgart)
Quantum Information Quantum Computing Quantum Cryptography Quantum teleportation (see Entanglement)	Medium to long	Michel Le Bellac (Sophia Antipolis, Nice) submitted
Quantum logic	Medium to long	Peter Mittelstaedt submitted
Quantum Jump Experiments	medium	H. Carmichael (Auckland), submitted
Quantum jumps	Short	Klaus Hentschel, submitted
Quantum numbers	short	Klaus Hentschel (Stuttgart) submitted
Quantum mechanics (1925-26), see Matrix Mechanics, Schrödinger equation ·  Algebraic · Operational  Relativistic	medium to long	NP Landsman (Nijmegen) submitted D. Aerts (Brussels) submitted Helge Kragh (Aarhus), submitted
Quantum propensities, see propensities in QM
Quantum states (see separate entries and States in QM) · GHZ states · Mesoscopic · Mixed State ·  Pure State · Squeezed states · Werner States
Quantum State Diffusion Theory, see GWR interpretation	short	Mauricio Suarez, Madrid, submitted
Quantum statistics (see Bose-Einstein/Fermi-Dirac statistics/ Ιndistinguishability )	short	A. Borrelli (Berlin)submitted
Quantum theory (1900-1924), see also atom models, quantum mechanics 1925- § Early quantum theory (c.1900-1913) § § quantum theory, crisis period (c.1923-early 1925)	long medium	§ Clayton A. Gearhart (Collegeville), submitted § Klaus Hentschel (Stuttgart), submitted
Quantum (State) Tomography/Estimation, see Quantum State Reconstruction
Quantum State Reconstruction	medium	St. Weigert (York), submitted
Quantum Zeno’s Paradox	medium	E. Joos, submitted
QED QCD	long medium	Kim Milton (Oklahoma), submitted
Quarks, see Particle Physics
Quasi-classical limit	medium	NP Landsman (Nijmegen) submitted
Radioactive decay Law (Rutherford/Soddy)		Friedel Weinert (Bradford)submitted
Relativistic Quantum Mechanics, see Quantum Mechanics
Renormalization, see also Particle Physics	medium	Arianna Borrelli (MPIWG, Berlin) submitted
Representations of quantum mechanics, see Heisenberg picture, Schrödinger picture
Rigged Hilbert Spaces in Quantum Physics Rigged Hilbert Spaces for the Dirac Formalism and Time-Symmetric Quantum Mechanics Rigged Hilbert Spaces and Time Asymmetric Quantum Theory	medium medium long	J.-P.Antoine/R. Bishop/A. Bohm/S.Wickramasekara submitted J.-P.Antoine/A. Bohm/S.Wickramasekara  submitted A. Bohm (Texas)/N. Harshman (Washington) submitted
Russell-Saunders coupling	short	K. Hentschel (Bern), submitted
Scattering Experiments · Compton Scattering · Large-angle scattering · Form Factors See also Experiments in QM	medium	Brigitte Falkenburg (Dortmund) submitted
Schrödinger’s Cat Preparation of Schrödinger cat states	medium	Henry Stapp submitted
Schrödinger equation Time-dependent Time-independent	long	M. Breinig (Tennessee), submitted
Schrödinger Picture	short	M. Breinig (Tennessee), submitted
Selection Rules	short	Klaus Hentschel, submitted
Semi-spectral measure (POVM, POM), see Observables	short	R. Tumulka (Rutgers)submitted
Semi-classical models/theories, see models		M. Arndt, submitted
Shor's Algorithm see Quantum Information
Solitons/Solitary waves	long	A. Seeger (Stuttgart), submitted
Sommerfeld School	medium	M. Eckert (Munich) submitted
Space quantization, see Stern-Gerlach experiment
Specific Heat		Clayton Gearhart, submitted
Spectroscopy	medium	Klaus Hentschel submitted
Spin (Uhlenbeck/Goudsmit), see also Pauli Exclusion Principle	medium	K. Hentschel (Stuttgart) , submitted
Spin-echo experiments	short	A. Weis (Fribourg), submitted
Spin statistics theorem	medium	Arianna Borrelli (MPIWG, Berlin) submitted
Squeezed States	medium	Martin Plenio (Imperial College, London), submitted
Standard Model, see Particle Physics
Stark effect	medium	Klaus Hentschel submitted
States in QM	medium	Leslie Ballentine, submitted
States, pure & mixed, and their representation	medium	Leslie Ballentine, submitted
State operator/ statistical operator, see density matrix	short	L. Ballentine  submitted
Stern-Gerlach Experiment	medium	Friedel Weinert (Bradford)submitted
String theory, see Quantum Gravity
Superconductivity/ Superfluidity		Kostas Gavroglu (Athen), submitted
Superluminal Communication in QM	short	Daniel Gauthier (Duke) submitted
Superposition Principle	short	M. Breinig (Tennessee), submitted
Superposition coherent incoherent	short	M. Breinig (Tennessee), submitted
(Super)selection Rules - general - environmentally-induced	long	D. Giulini (Freiburg) submitted
Superstring, see Quantum Gravity	long
Symmetry	Medium to long	K. Mainzer  (Munich) submitted
Thought experiments, see Errors and Paradoxes in QM
Time in QT		H. D. Zeh (Heidelberg), submitted
Trace	short	R. Tumulka (Rutgers)submitted
Tunnel Effect	medium	G. Nimtz (Cologne), submitted
Turing machines and quantum computers, see Quantum Information
Two-slit experiment, see Double-slit experiment	medium	G. Jaeger (Boston), submitted
Two-state vector formalism	medium	L. Vaidman (Tel Aviv), submitted
Uncertainty Relations, see Indeterminacy Relations
unitary group representation
Unitary evolution, see wave function
Unsharp properties, see Effect (Ludwig)		Paul Busch
Vector model	short	K. Hentschel (Bern), submitted
Virtual particles
Von Neumann, see measurement theory
Wave function (history)	Long long	Helge Kragh (Aarhus) submitted I. O. Stamatescu (Heidelberg), submitted
· Collapse · Unitary evolution · Single Particle                  Interpretation
Wave mechanics (see Schrödinger Picture)	long
Wave-particle duality	short	Bruce Wheaton, submitted
Wave packet	Short to medium	Helge Kragh submitted
Weak Value and Weak Measurements	short	Lev Vaidman (Tel-Aviv), submitted
Werner States	short	A. Acin (Barcelona), submitted
Which-way experiment/welcher-Weg experiment	medium	Paul Busch (York)/Greg Jaeger (Boston) submitted
Wigner Distribution	short	R. O'Connell (Louisiana), submitted
Wigner’s friend	medium	Henry Stapp (Lawrence Berkeley Lab), submitted
x-rays	medium	Bruce Wheaton, submitted
Zeeman effect (normal, anomalous)	medium	Klaus Hentschel, submitted
Zero-Point Energy		Peter Milonni, Los Alamos Nat'l Lab.(LANL), submitted

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[1] Key: short (1/2-1 page); medium (2-3 pages), long (4-5 pages)