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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

A Universal quantum physics

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Is Time Travel the Key to Understanding Dirac's Equation and Positron Creation?

Apr 16, 2008 · Replies 2 · Apr 16, 2008

Replies: 2

Views: 4K

Summary of the key formula of QFT

Jan 31, 2008 · Replies 9 · Apr 16, 2008

Replies: 9

Views: 6K

Uncertainty principle and photon

Apr 15, 2008 · Replies 4 · Apr 16, 2008

Replies: 4

Views: 4K

Renormalizability - how to determine if a theory is renormalizable?

Apr 16, 2008 · Replies 3 · Apr 16, 2008

Replies: 3

Views: 5K

Understanding Double Slit Interference in Electron Diffraction

Apr 8, 2008 · Replies 40 · Apr 16, 2008

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Replies: 40

Views: 9K

Creation/annihilation operators

Apr 11, 2008 · Replies 16 · Apr 16, 2008

Replies: 16

Views: 11K

Atomic Radius Increase Up Periodic Table: Why?

Apr 16, 2008 · Replies 1 · Apr 16, 2008

Replies: 1

Views: 3K

The difference between BOSONS and FERMIONS

Apr 15, 2008 · Replies 3 · Apr 16, 2008

Replies: 3

Views: 15K

Evaluate the Klein-Gordon action

Apr 16, 2008 · Replies 1 · Apr 16, 2008

Replies: 1

Views: 3K

Preferred basis and prereduction of density matrices

Apr 15, 2008 · Replies 6 · Apr 16, 2008

Replies: 6

Views: 3K

Discrete spacetime means discrete momentum ?

Apr 16, 2008 · Replies 1 · Apr 16, 2008

Replies: 1

Views: 3K

Uncertainty Principle & Measuring Momentum: Is There a Confusion?

Apr 16, 2008 · Replies 2 · Apr 16, 2008

Replies: 2

Views: 2K

A question about Photoelectric Effect

Apr 14, 2008 · Replies 25 · Apr 16, 2008

Replies: 25

Views: 14K

The necessity of time-dependence in making approximations of the H2+ molecule

Apr 15, 2008 · Replies 2 · Apr 16, 2008

Replies: 2

Views: 3K

Heisenberg Uncertainty Principle to estimate the position uncertainty

Apr 12, 2008 · Replies 11 · Apr 16, 2008

Replies: 11

Views: 5K

What is the particle pair phenomenon and how does quantum entanglement work?

Apr 15, 2008 · Replies 2 · Apr 15, 2008

Replies: 2

Views: 4K

Atomic Oscillations: Frequency, Nuclear & Wave Function

Apr 11, 2008 · Replies 5 · Apr 14, 2008

Replies: 5

Views: 4K

Klein-Gordon equation for electro-magnetic field?

Apr 9, 2008 · Replies 27 · Apr 14, 2008

Replies: 27

Views: 11K

Uncertainty principle and vacuum fluctuations

Apr 10, 2008 · Replies 4 · Apr 14, 2008

Replies: 4

Views: 5K

Question about density matrices

Apr 12, 2008 · Replies 2 · Apr 14, 2008

Replies: 2

Views: 2K

Is Electron Spin Just a Mathematical Concept?

Apr 10, 2008 · Replies 11 · Apr 14, 2008

Replies: 11

Views: 5K

Why is Schrodinger's Cat only a thought experiment?

Apr 5, 2008 · Replies 55 · Apr 14, 2008

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Replies: 55

Views: 11K

Time evolution and the Dirac Equation

Apr 9, 2008 · Replies 3 · Apr 14, 2008

Replies: 3

Views: 4K

Plane waves not physical states?

Apr 12, 2008 · Replies 4 · Apr 13, 2008

Replies: 4

Views: 5K

Why forces are modeled as virtual particles in quantum mechanics?

Apr 13, 2008 · Replies 1 · Apr 13, 2008

Replies: 1

Views: 3K

Understanding Plane Wave Solutions in Quantum Mechanics

Apr 3, 2008 · Replies 19 · Apr 12, 2008

Replies: 19

Views: 10K

Backward causation intepretation

Apr 12, 2008 · Replies 1 · Apr 12, 2008

Replies: 1

Views: 2K

Representation of j=1 rotation matrix

Apr 12, 2008 · Replies 4 · Apr 12, 2008

Replies: 4

Views: 4K

How to Find the Ground State of a System of Identical Bosons?

Apr 8, 2008 · Replies 4 · Apr 11, 2008

Replies: 4

Views: 3K

Photovoltaic and Superconductivity

Apr 10, 2008 · Replies 6 · Apr 11, 2008

Replies: 6

Views: 4K

Interactions that cause entanglement

Apr 6, 2008 · Replies 12 · Apr 10, 2008

Replies: 12

Views: 3K

Understanding Local Gauge Symmetry

Apr 10, 2008 · Replies 3 · Apr 10, 2008

Replies: 3

Views: 5K

What if Cramer's FTL Experiment Worked?

Apr 10, 2008 · Replies 2 · Apr 10, 2008

Replies: 2

Views: 2K

Is Time Elapsed During Photon Absorption a Quantum Illusion?

Apr 10, 2008 · Replies 5 · Apr 10, 2008

Replies: 5

Views: 3K

Is teleportation just advanced cloning?

Apr 9, 2008 · Replies 5 · Apr 9, 2008

Replies: 5

Views: 3K

Is Scientific Publishing Fair in the Context of Hawking's Manuscript?

Mar 28, 2008 · Replies 8 · Apr 9, 2008

Replies: 8

Views: 4K

Momentum-space detection of an Electron (EWP)

Apr 8, 2008 · Replies 1 · Apr 8, 2008

Replies: 1

Views: 2K

Virtual Particles: How They Work

Apr 7, 2008 · Replies 5 · Apr 8, 2008

Replies: 5

Views: 3K

Quantum Mechanics for the 'lay person'

Apr 4, 2008 · Replies 14 · Apr 8, 2008

Replies: 14

Views: 4K

Uncertainty Principle and Single-Slit Diffraction

Apr 7, 2008 · Replies 10 · Apr 8, 2008

Replies: 10

Views: 10K

Variation on Dopfer Experiment - Why Won't This Work?

Apr 4, 2008 · Replies 9 · Apr 8, 2008

Replies: 9

Views: 5K

Quantum Non-Locality Subspace Radio

Apr 7, 2008 · Replies 2 · Apr 7, 2008

Replies: 2

Views: 3K

Unification 'theory' (small energy)

Apr 7, 2008 · Replies 1 · Apr 7, 2008

Replies: 1

Views: 2K

Do Commuting Observables in Quantum Physics Share Common Eigenfunctions?

Apr 7, 2008 · Replies 3 · Apr 7, 2008

Replies: 3

Views: 3K

Photons - Wavelength and Wavepackets

Apr 6, 2008 · Replies 1 · Apr 7, 2008

Replies: 1

Views: 4K

Entanglement Explained with Epistomological Probability Theory

Apr 2, 2008 · Replies 23 · Apr 7, 2008

Replies: 23

Views: 7K

Quantum Field Theory online book, 885pages

Apr 7, 2008 · Replies 1 · Apr 7, 2008

Replies: 1

Views: 6K

Questions on Electron Orbitals, Wave Packets, and Coherent States

Apr 6, 2008 · Replies 7 · Apr 6, 2008

Replies: 7

Views: 4K

Nine formulations of Quantum Mechanics

Apr 6, 2008 · Replies 2 · Apr 6, 2008

Replies: 2

Views: 5K

What is the Role of Magnetic Fields in Allowing Electron Transitions?

Apr 5, 2008 · Replies 2 · Apr 6, 2008

Replies: 2

Views: 3K

Operator Rotation: Expressing in New Reference Frame

Apr 5, 2008 · Replies 3 · Apr 6, 2008

Replies: 3

Views: 2K

How do bilinear covariants relate to the Dirac equation's broader implications?

Apr 6, 2008 · Replies 1 · Apr 6, 2008

Replies: 1

Views: 7K

Vacuum Fluctuations: Particles & Antiparticles

Apr 3, 2008 · Replies 8 · Apr 5, 2008

Replies: 8

Views: 4K

Calculating Base State for the H Atom using Inverse Fourier Transform

Apr 4, 2008 · Replies 3 · Apr 4, 2008

Replies: 3

Views: 2K

Is Annihilation Really Just Positronium Ground State?

Apr 4, 2008 · Replies 2 · Apr 4, 2008

Replies: 2

Views: 6K

Schrodinger equation graph help

Apr 3, 2008 · Replies 6 · Apr 4, 2008

Replies: 6

Views: 3K

Entanglement + Fusion: need a visual metaphor

Apr 2, 2008 · Replies 9 · Apr 4, 2008

Replies: 9

Views: 4K

Elementary particles and fermat's principle

Mar 31, 2008 · Replies 3 · Apr 3, 2008

Replies: 3

Views: 2K

Probability of staying in same state after time-dep perturbation?

Apr 2, 2008 · Replies 1 · Apr 3, 2008

Replies: 1

Views: 2K

Is entanglement just a mathematical construct or is it a real phenomenon?

Mar 10, 2008 · Replies 48 · Apr 3, 2008

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Replies: 48

Views: 11K

Where Can I Find Pauli's Original Proof of the Spin-Statistics Theorem?

Mar 12, 2006 · Replies 12 · Apr 2, 2008

Replies: 12

Views: 4K

Superliminal Information Transfer

Apr 1, 2008 · Replies 10 · Apr 2, 2008

Replies: 10

Views: 3K

Are Electrons Photons Stuck in Atom's Nucleus?

Mar 29, 2008 · Replies 5 · Apr 1, 2008

Replies: 5

Views: 9K

Constructing time-independent wave function with given energies

Mar 30, 2008 · Replies 2 · Mar 31, 2008

Replies: 2

Views: 3K

Understanding the Mystery of Photon Wavefunction in Quantum Field Theory

Mar 29, 2008 · Replies 18 · Mar 31, 2008

Replies: 18

Views: 6K

Matter-antimatter annihilation

Mar 27, 2008 · Replies 5 · Mar 31, 2008

Replies: 5

Views: 10K

Quantum Field Theory: Field Operators and Lorentz invariance

Mar 31, 2008 · Replies 6 · Mar 31, 2008

Replies: 6

Views: 10K

Frequency of a particle? Frequency of what?

Mar 29, 2008 · Replies 4 · Mar 30, 2008

Replies: 4

Views: 13K

How Does Light Diffraction Occur in Plasma?

Mar 30, 2008 · Replies 1 · Mar 30, 2008

Replies: 1

Views: 2K

How Can a Linear Potential Be Created Experimentally for Electron Studies?

Mar 30, 2008 · Replies 3 · Mar 30, 2008

Replies: 3

Views: 2K

Detection of magnetic monopoles

Jan 17, 2005 · Replies 11 · Mar 30, 2008

Replies: 11

Views: 4K

Is the Zero Point Consistent Across the Universe?

Mar 26, 2008 · Replies 12 · Mar 30, 2008

Replies: 12

Views: 3K

Help Solve Physics Problem: Where is My Mistake?

Mar 21, 2008 · Replies 3 · Mar 30, 2008

Replies: 3

Views: 2K

Wigner-Eckart Thm: Calc Double Bar for Electric Dipole Op

Mar 28, 2008 · Replies 5 · Mar 29, 2008

Replies: 5

Views: 8K

Difference between interaction and interference of QM systems

Mar 28, 2008 · Replies 1 · Mar 28, 2008

Replies: 1

Views: 3K

Calculating Dislocation Chain Length in Solids

Mar 25, 2008 · Replies 1 · Mar 26, 2008

Replies: 1

Views: 14K

Confusion about the contour green's function

Mar 24, 2008 · Replies 2 · Mar 26, 2008

Replies: 2

Views: 3K

Understanding Unity: A Layman's Guide

Mar 26, 2008 · Replies 7 · Mar 26, 2008

Replies: 7

Views: 2K

Clarification on Introductory QM

Mar 24, 2008 · Replies 11 · Mar 26, 2008

Replies: 11

Views: 3K

Static Charge Photons: Frequency & Wavelength

Mar 25, 2008 · Replies 4 · Mar 25, 2008

Replies: 4

Views: 2K

Kinda new to this stuff, is there anything that makes electrons more

Mar 24, 2008 · Replies 6 · Mar 25, 2008

Replies: 6

Views: 2K

Is the Pauli Exclusion Principle Universally Applicable?

Dec 9, 2007 · Replies 22 · Mar 25, 2008

Replies: 22

Views: 8K

What are the angles of photoelectron emissions from a metal surface?

Mar 25, 2008 · Replies 2 · Mar 25, 2008

Replies: 2

Views: 3K

What is the Information Loss Paradox and How Does Hawking Radiation Relate?

Mar 16, 2008 · Replies 31 · Mar 24, 2008

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Replies: 31

Views: 7K

Partial Mossbauer effect—Why not?

Mar 21, 2008 · Replies 1 · Mar 24, 2008

Replies: 1

Views: 2K

Experimental verification of QFT?

Mar 22, 2008 · Replies 7 · Mar 24, 2008

Replies: 7

Views: 3K

Discover the Truth About Weak Measurements in 2007 | Postbiota Discussion Thread

Mar 22, 2008 · Replies 1 · Mar 24, 2008

Replies: 1

Views: 2K

Simple Quantum Information Question

Mar 21, 2008 · Replies 4 · Mar 24, 2008

Replies: 4

Views: 2K

Hawking Radiation: Observational Proof, Quantum Fluctuations & More

Mar 22, 2008 · Replies 3 · Mar 23, 2008

Replies: 3

Views: 6K

Adam C: Funktionalanalytische u. Geometrische Anomalie Aspekte - Hilfe gesucht

Mar 22, 2008 · Replies 1 · Mar 23, 2008

Replies: 1

Views: 2K

Stimulated emission. Energy of the photon inducing the emission.

Mar 21, 2008 · Replies 3 · Mar 23, 2008

Replies: 3

Views: 8K

Rabi oscillations and spin 1/2 systems.

Mar 23, 2008 · Replies 3 · Mar 23, 2008

Replies: 3

Views: 5K

Deriving Jeans' Result from Magnetic Vector Potential

Mar 22, 2008 · Replies 1 · Mar 22, 2008

Replies: 1

Views: 4K

Computational project in quantum physics

Mar 19, 2008 · Replies 6 · Mar 22, 2008

Replies: 6

Views: 5K

Do photons collide with each other like any other massive object?

Mar 20, 2008 · Replies 6 · Mar 22, 2008

Replies: 6

Views: 11K

Schroedinger Equation (The original article)

Mar 19, 2008 · Replies 4 · Mar 21, 2008

Replies: 4

Views: 15K

Understanding Phase Diffusion in Bose Einstein Condensates

Mar 20, 2008 · Replies 3 · Mar 21, 2008

Replies: 3

Views: 8K

Infinite Well: Ladder Operators for Simplified Expression

Mar 20, 2008 · Replies 7 · Mar 20, 2008

Replies: 7

Views: 4K

Eigenstates: What would happen if you had a laser aimed at a mirror 45 degrees.

Mar 19, 2008 · Replies 4 · Mar 20, 2008

Replies: 4

Views: 4K

Second Quantization and Field Operators

Mar 10, 2008 · Replies 34 · Mar 20, 2008

2

Replies: 34

Views: 11K

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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