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Quantum Physics Forum

Join in expert discussion on quantum physics. Quantum physics is the mathematical description of the motion and interaction of subatomic particles. Quantum Mechanics and Field Theory.

Quantum Interpretations and Foundations

Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture

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Graduate Why don't lower energy photons sometimes produce a neutrino-antineutrino pair?

Dec 20, 2005 · Replies 13 · Dec 23, 2005

Replies: 13

Views: 7K

Graduate What causes a particle to go into superposition?

Dec 17, 2005 · Replies 11 · Dec 22, 2005

Replies: 11

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Graduate Learning at college about wave partile duality

Dec 11, 2005 · Replies 5 · Dec 21, 2005

Replies: 5

Views: 3K

Graduate Does Pair Creation = Bremsstrahlung?

Dec 19, 2005 · Replies 2 · Dec 20, 2005

Replies: 2

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Graduate When a free proton captures a free electron

Dec 18, 2005 · Replies 10 · Dec 20, 2005

Replies: 10

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Graduate Vacuum Polarization - Why invoked?

Dec 15, 2005 · Replies 14 · Dec 20, 2005

Replies: 14

Views: 4K

University of Australia Slows Light to 670 mph

Dec 14, 2005 · Replies 8 · Dec 19, 2005

Replies: 8

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Graduate How Does Quantum Field Theory Explain Vacuum Energy and Momentum?

Dec 19, 2005 · Replies 1 · Dec 19, 2005

Replies: 1

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Graduate Everything in nature is truly random and unpredictable

Dec 17, 2005 · Replies 6 · Dec 19, 2005

Replies: 6

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Graduate Debroglie wavelength of a baseball

Dec 17, 2005 · Replies 2 · Dec 18, 2005

Replies: 2

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Graduate Kinetic energy change in virtual photon exchange

Dec 13, 2005 · Replies 22 · Dec 16, 2005

Replies: 22

Views: 6K

Graduate What do the terms in Heisenberg's matrices represent?

Dec 7, 2005 · Replies 4 · Dec 16, 2005

Replies: 4

Views: 4K

Poll

Graduate What causes the arrow of time ?

Nov 5, 2005 · Replies 150 · Dec 15, 2005

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Replies: 150

Views: 19K

Graduate Are Parallel Universes and Dimensions Real or Just Theoretical Possibilities?

Dec 14, 2005 · Replies 3 · Dec 15, 2005

Replies: 3

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Graduate Why the name Second Quantization ?

Dec 2, 2005 · Replies 22 · Dec 15, 2005

Replies: 22

Views: 6K

Graduate Solving Shrodinger Equation for Hawking Radiation

Dec 13, 2005 · Replies 1 · Dec 14, 2005

Replies: 1

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Graduate A question on momenta of electrons

Dec 13, 2005 · Replies 3 · Dec 13, 2005

Replies: 3

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Graduate QED vs Point Charge of the Electron

Dec 11, 2005 · Replies 10 · Dec 13, 2005

Replies: 10

Views: 3K

High School What is correct write about photon?

Dec 12, 2005 · Replies 2 · Dec 12, 2005

Replies: 2

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Undergrad Wave-Particle Duality of Light

Dec 13, 2004 · Replies 16 · Dec 12, 2005

Replies: 16

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Graduate Why Is the Wave Function of Photons Considered a Physical Wave?

Dec 10, 2005 · Replies 14 · Dec 12, 2005

Replies: 14

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Undergrad Quantum Mechanics Book for First Year Physics Students

Dec 8, 2005 · Replies 13 · Dec 12, 2005

Replies: 13

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Graduate Uncertainty theory doesn't disprove fate?

Dec 11, 2005 · Replies 4 · Dec 11, 2005

Replies: 4

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Graduate What Are the Quantum Forces Behind Diffusion Phenomena?

Dec 10, 2005 · Replies 3 · Dec 11, 2005

Replies: 3

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Graduate Where can I find J. Bell's book on Quantum Mechanics?

Dec 8, 2005 · Replies 3 · Dec 10, 2005

Replies: 3

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Graduate Thought Experiment: What Happens When Photons are Added to a Vacuum Space?

Dec 7, 2005 · Replies 20 · Dec 9, 2005

Replies: 20

Views: 5K

Graduate Does violation of Bell's inequality imply faster-than-light communication?

Dec 6, 2005 · Replies 16 · Dec 9, 2005

Replies: 16

Views: 5K

Graduate Defining Charge: Electrons, Protons, and Spin

Dec 3, 2005 · Replies 16 · Dec 9, 2005

Replies: 16

Views: 4K

Undergrad Help me find a couple of good articles

Dec 1, 2005 · Replies 2 · Dec 8, 2005

Replies: 2

Views: 3K

Graduate How is adiabatic invariant proved in a simple dynamic system?

Dec 8, 2005 · Replies 1 · Dec 8, 2005

Replies: 1

Views: 2K

Graduate Is the Gedanken Data on Quantum Entanglement Available Online?

Dec 7, 2005 · Replies 3 · Dec 7, 2005

Replies: 3

Views: 2K

Graduate Can Penrose's Felix experiment prove the role of gravity in objective collapse?

Nov 29, 2005 · Replies 9 · Dec 7, 2005

Replies: 9

Views: 5K

Graduate Clearing the Misconception on Light's Wave-Particle Duality

Nov 30, 2005 · Replies 4 · Dec 7, 2005

Replies: 4

Views: 3K

Graduate Particle Spin: Definition & Meaning

Nov 20, 2005 · Replies 8 · Dec 7, 2005

Replies: 8

Views: 3K

Graduate Photon bunching in quantum optics

Nov 23, 2005 · Replies 4 · Dec 6, 2005

Replies: 4

Views: 11K

Graduate Is there a proof for Fermi and Bose statistics?

Nov 24, 2005 · Replies 14 · Dec 6, 2005

Replies: 14

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Graduate Proof of non-locality indep. of conservation law

Nov 13, 2005 · Replies 34 · Dec 6, 2005

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Replies: 34

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Graduate A trick to solve functional integraltion?

Nov 8, 2005 · Replies 3 · Dec 5, 2005

Replies: 3

Views: 3K

Graduate Can Particle/Wave Duality Be Explained by the Nature of Space-Time?

Dec 3, 2005 · Replies 1 · Dec 4, 2005

Replies: 1

Views: 4K

Graduate Does a controversy still exist ?

Nov 14, 2005 · Replies 108 · Dec 4, 2005

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Replies: 108

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Graduate Layman's definition of CM and QM?

Dec 3, 2005 · Replies 2 · Dec 4, 2005

Replies: 2

Views: 5K

Graduate Can a complex potential have real energies?

Dec 4, 2005 · Replies 1 · Dec 4, 2005

Replies: 1

Views: 2K

Undergrad Harmonic Oscillator: Lowest Allowed Energy Not E=0?

Dec 4, 2005 · Replies 3 · Dec 4, 2005

Replies: 3

Views: 3K

Where did Will 'O The Wisp Go?

Dec 3, 2005 · Replies 1 · Dec 3, 2005

Replies: 1

Views: 2K

Understanding the Layman's Definition of a Unit

Nov 20, 2005 · Replies 3 · Dec 3, 2005

Replies: 3

Views: 4K

Graduate How Big is a Photon? Envelope Size & Oscillations

Dec 2, 2005 · Replies 20 · Dec 3, 2005

Replies: 20

Views: 6K

Graduate What Are the Core Equations of Quantum Mechanics Contradicting Relativity?

Nov 30, 2005 · Replies 4 · Dec 2, 2005

Replies: 4

Views: 2K

Graduate Finding Wave Function Collapse

Nov 13, 2005 · Replies 19 · Dec 2, 2005

Replies: 19

Views: 4K

Graduate Intermediate qm what should i know

Nov 30, 2005 · Replies 6 · Dec 1, 2005

Replies: 6

Views: 3K

Graduate Requirements of All Hidden Variable Theories

Nov 28, 2005 · Replies 28 · Dec 1, 2005

Replies: 28

Views: 4K

Graduate Draw graphs for self-energy and Vertex functions

Nov 30, 2005 · Replies 3 · Dec 1, 2005

Replies: 3

Views: 2K

Virtual Particles - Is it True?

Nov 29, 2005 · Replies 11 · Nov 30, 2005

Replies: 11

Views: 3K

Graduate Attempts to make the Born rule emerge explicitly from outcome counting

Nov 29, 2005 · Replies 4 · Nov 30, 2005

Replies: 4

Views: 4K

Graduate Field Quantization: SHOs vs Bounded States

Nov 23, 2005 · Replies 5 · Nov 30, 2005

Replies: 5

Views: 6K

Graduate How Can Renormalization Methods Remove Singularities in Divergent Series?

Nov 29, 2005 · Replies 1 · Nov 29, 2005

Replies: 1

Views: 2K

Undergrad Why did Stern and Gerlach use a non-uniform magnetic field in their experiment?

Nov 29, 2005 · Replies 2 · Nov 29, 2005

Replies: 2

Views: 4K

Graduate Is hf=mc2 a Valid Equation in Physics?

Nov 28, 2005 · Replies 3 · Nov 28, 2005

Replies: 3

Views: 15K

Graduate Entanglement of common cosmological origin?

Nov 25, 2005 · Replies 10 · Nov 28, 2005

Replies: 10

Views: 3K

Graduate Dirac Contraction: Evaluating Propagators at Same Point

Nov 27, 2005 · Replies 6 · Nov 27, 2005

Replies: 6

Views: 3K

Graduate Bethe-Salpeter equation confused

Nov 27, 2005 · Replies 1 · Nov 27, 2005

Replies: 1

Views: 3K

Graduate Zero Point Enery Field Manipulator

Nov 24, 2005 · Replies 2 · Nov 25, 2005

Replies: 2

Views: 3K

Graduate Zero Point Energy: An Exploration of Its Meaning & Implications

Nov 24, 2005 · Replies 2 · Nov 25, 2005

Replies: 2

Views: 2K

Graduate Classical Atom Models: A Nobel Prize Waiting to be Won?

Nov 16, 2005 · Replies 78 · Nov 25, 2005

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Replies: 78

Views: 9K

Graduate Can I post my light theory on Physics Forums?

Nov 25, 2005 · Replies 2 · Nov 25, 2005

Replies: 2

Views: 2K

Graduate Quantum mechanics and classical physics

Nov 6, 2005 · Replies 13 · Nov 23, 2005

Replies: 13

Views: 7K

Graduate What is the relationship between quantum mechanics and quantum field theory?

Nov 23, 2005 · Replies 8 · Nov 23, 2005

Replies: 8

Views: 5K

Graduate Electric dipole selection rules

Nov 23, 2005 · Replies 1 · Nov 23, 2005

Replies: 1

Views: 11K

Graduate Confused ( well obviously it QM ) - TDSE problem in understand

Nov 22, 2005 · Replies 3 · Nov 22, 2005

Replies: 3

Views: 2K

Graduate Calculating Vacuum Polarization Effect on Hydrogen Atom

Nov 15, 2005 · Replies 5 · Nov 22, 2005

Replies: 5

Views: 3K

Poll

Graduate Non disturbing (?) measurement

Nov 22, 2005 · Replies 5 · Nov 22, 2005

Replies: 5

Views: 3K

Graduate How can electrodynamics prove the stability of electron

Oct 24, 2005 · Replies 29 · Nov 20, 2005

Replies: 29

Views: 4K

Graduate A new nonlinear Schrodinger equation

Nov 19, 2005 · Replies 2 · Nov 20, 2005

Replies: 2

Views: 3K

Graduate I have a question about Beta Decay

Nov 19, 2005 · Replies 2 · Nov 19, 2005

Replies: 2

Views: 5K

Graduate Exact calculation of tunneling current?

Nov 18, 2005 · Replies 8 · Nov 19, 2005

Replies: 8

Views: 10K

Graduate Schrödinger equation: P(r)>1 ?

Nov 19, 2005 · Replies 3 · Nov 19, 2005

Replies: 3

Views: 4K

Graduate Finding "Dynamical Symmetry Breaking in Quantum Field Theories

Nov 17, 2005 · Replies 5 · Nov 18, 2005

Replies: 5

Views: 3K

Graduate Creating 3 Photon Entanglement with PDC: Can it be Done?

Oct 23, 2005 · Replies 24 · Nov 18, 2005

Replies: 24

Views: 4K

Graduate What counts as a measurement in QM?

Nov 7, 2005 · Replies 34 · Nov 17, 2005

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Replies: 34

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Graduate What's the Flaw with Classical Mechanics and Quantum Mechanics?

Nov 10, 2005 · Replies 9 · Nov 17, 2005

Replies: 9

Views: 3K

Graduate Planck Temperature: Is It The Upper Limit?

Nov 14, 2005 · Replies 3 · Nov 17, 2005

Replies: 3

Views: 6K

Graduate Estimating Average Electric Field and Volume of Atomic Photons | DaTario

Nov 14, 2005 · Replies 12 · Nov 17, 2005

Replies: 12

Views: 3K

Graduate Can you measure an objects spin or position, or polarization

Nov 3, 2005 · Replies 13 · Nov 16, 2005

Replies: 13

Views: 3K

Graduate Entanglement with more than two particles

Nov 16, 2005 · Replies 3 · Nov 16, 2005

Replies: 3

Views: 4K

Undergrad Question about Planck's constant

Nov 15, 2005 · Replies 2 · Nov 16, 2005

Replies: 2

Views: 3K

Graduate Hamiltonian with complex potential

Aug 18, 2005 · Replies 19 · Nov 15, 2005

Replies: 19

Views: 10K

Graduate Can Instantaneous Action at a Distance Exist Within Planck Time Limits?

Nov 9, 2005 · Replies 6 · Nov 15, 2005

Replies: 6

Views: 3K

Graduate Why Does Inserting a Mass Width Simulate Higher Order Diagram Effects?

Nov 10, 2005 · Replies 9 · Nov 15, 2005

Replies: 9

Views: 4K

Graduate Is QM Inherently Non-local in EPR and Bell Discussions?

Oct 23, 2005 · Replies 232 · Nov 13, 2005

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Replies: 232

Views: 25K

Graduate Imaginary Momentum: Physical Interpretation of Bound States

Nov 12, 2005 · Replies 7 · Nov 13, 2005

Replies: 7

Views: 8K

Graduate Electric field produced by electron

Nov 2, 2005 · Replies 21 · Nov 12, 2005

Replies: 21

Views: 6K

Graduate What role does the delta function play in quantum mechanics and field theory?

Nov 11, 2005 · Replies 3 · Nov 11, 2005

Replies: 3

Views: 3K

Undergrad Learning Quantum Mechanics - A Guide for Physics A-Levelers with Math Background

Nov 9, 2005 · Replies 7 · Nov 11, 2005

Replies: 7

Views: 3K

Graduate David Asks: Does Beckenstein's Law Work Both Ways?

Oct 16, 2005 · Replies 1 · Nov 10, 2005

Replies: 1

Views: 3K

Graduate Feynman Rules for Phi to the 6th theory

Nov 8, 2005 · Replies 7 · Nov 9, 2005

Replies: 7

Views: 8K

Graduate Is there any validity to the disproof of quantum physics theory?

Nov 6, 2005 · Replies 7 · Nov 8, 2005

Replies: 7

Views: 3K

Graduate Fields in quantum field theory

Nov 3, 2005 · Replies 7 · Nov 8, 2005

Replies: 7

Views: 4K

Graduate Divergent series in perturbation theory of quantum field theory

Nov 6, 2005 · Replies 2 · Nov 8, 2005

Replies: 2

Views: 3K

Graduate Question about continuity postulates

Nov 5, 2005 · Replies 9 · Nov 8, 2005

Replies: 9

Views: 3K

Graduate How does time function in quantum mechanics and its multiverse implications?

Oct 22, 2005 · Replies 34 · Nov 7, 2005

2

Replies: 34

Views: 6K

Poll

Graduate Hydrino's and Blacklight Power

Nov 7, 2005 · Replies 3 · Nov 7, 2005

Replies: 3

Views: 5K

Quantum Physics

Quantum physics, or quantum mechanics, is a branch of physics that explores the behavior of matter and energy at the smallest scales, where classical physics principles break down. It introduces the concept of quantization, suggesting that certain properties, such as energy levels, are quantized and can only exist in discrete values.

Quantum mechanics encompasses wave-particle duality, where particles like electrons exhibit both wave and particle characteristics. The theory is probabilistic, relying on probability amplitudes to predict outcomes, and features phenomena like superposition, where particles can exist in multiple states simultaneously.

Quantum physics has transformed our understanding of the microscopic world, leading to technologies like transistors and lasers, and continues to provoke profound questions about the nature of reality and the role of observation in shaping it.

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