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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 Universal quantum physics

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Graduate Does quantum theory make bizarre events possible?

Jun 30, 2005 · Replies 23 · Aug 1, 2005

Replies: 23

Views: 4K

Graduate Understanding Linear Vector Spaces for System Representation

Jul 30, 2005 · Replies 18 · Jul 31, 2005

Replies: 18

Views: 4K

Graduate Under what conditions will quantum effects become important for gravity?

Jul 29, 2005 · Replies 17 · Jul 31, 2005

Replies: 17

Views: 4K

Graduate Ladder Operator Theorem: Uniting Operators Through Unitary Transformations

Jul 19, 2005 · Replies 12 · Jul 30, 2005

Replies: 12

Views: 4K

Graduate Understanding the Set of Commuting Observables

Jul 27, 2005 · Replies 6 · Jul 30, 2005

Replies: 6

Views: 3K

Graduate Ehrenfest's Theorem: Quantum Mechanics Explained

Jul 28, 2005 · Replies 6 · Jul 28, 2005

Replies: 6

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Graduate Trouble understanding how charge density is the amplitude squared

Jul 27, 2005 · Replies 2 · Jul 28, 2005

Replies: 2

Views: 3K

Graduate Double-Slit Experiments: Young, Taylor, Light & Electrons

Jul 25, 2005 · Replies 35 · Jul 28, 2005

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Replies: 35

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Graduate Physical meaning for wavefunction

Jul 22, 2005 · Replies 10 · Jul 28, 2005

Replies: 10

Views: 19K

Graduate Why isn't the constant force problem in QM classes?

Jul 12, 2005 · Replies 22 · Jul 27, 2005

Replies: 22

Views: 6K

Graduate Anomalies of wave particle duality

Jul 20, 2005 · Replies 2 · Jul 27, 2005

Replies: 2

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Graduate Difficult geometries - Casimir Effect

Jul 2, 2005 · Replies 10 · Jul 26, 2005

Replies: 10

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Graduate How much is this renormalization business a problem in QFT?

Jul 25, 2005 · Replies 3 · Jul 26, 2005

Replies: 3

Views: 3K

Graduate Exploring the Multiverse: The Double Slit Time Experiment

Mar 3, 2005 · Replies 5 · Jul 25, 2005

Replies: 5

Views: 4K

Graduate What is the Wick Rotation mystery

Jul 23, 2005 · Replies 2 · Jul 24, 2005

Replies: 2

Views: 3K

Graduate Direction of a single particle wave

Jul 20, 2005 · Replies 4 · Jul 24, 2005

Replies: 4

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Graduate What Are the Essential Concepts for Teaching Zeeman Splitting?

Jul 23, 2005 · Replies 8 · Jul 24, 2005

Replies: 8

Views: 3K

Graduate Dirac equation and path integral

Jul 16, 2005 · Replies 2 · Jul 23, 2005

Replies: 2

Views: 3K

Graduate Time Evolution of Quantum systems.

Jul 14, 2005 · Replies 17 · Jul 23, 2005

Replies: 17

Views: 6K

Graduate A quantum foam absorber: theoretically possible?

Jul 17, 2005 · Replies 10 · Jul 22, 2005

Replies: 10

Views: 3K

Graduate Path Integral that is valid for a Particle

Jul 22, 2005 · Replies 2 · Jul 22, 2005

Replies: 2

Views: 3K

Undergrad What is the difference in amplitude between red and blue photons?

Jul 21, 2005 · Replies 2 · Jul 22, 2005

Replies: 2

Views: 3K

Graduate Is the Delayed Choice Experiment Truly Demonstrating Quantum Weirdness?

Mar 30, 2005 · Replies 6 · Jul 21, 2005

Replies: 6

Views: 4K

Graduate Electron Double-Slit Experiment: One Electron at a Time?

Jul 20, 2005 · Replies 11 · Jul 20, 2005

Replies: 11

Views: 3K

Graduate Applying Quantum Superposition to Spherical Standing Wave Structure

Jul 18, 2005 · Replies 2 · Jul 20, 2005

Replies: 2

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Graduate Pointwise convergence of fourier expansion

Jul 18, 2005 · Replies 4 · Jul 20, 2005

Replies: 4

Views: 5K

Undergrad Probability / Probability density

Jul 19, 2005 · Replies 2 · Jul 19, 2005

Replies: 2

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Graduate Gravitation, and wavelike particles

Jul 8, 2005 · Replies 2 · Jul 19, 2005

Replies: 2

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Graduate A question about Dirac's quantization

Jul 16, 2005 · Replies 12 · Jul 19, 2005

Replies: 12

Views: 4K

Graduate How come that Esinglet < Etriplet and Hund’s rule are both correct?

Jul 17, 2005 · Replies 2 · Jul 18, 2005

Replies: 2

Views: 2K

Undergrad Why do clouds form into definite cohesive shapes?

Jul 10, 2005 · Replies 1 · Jul 17, 2005

Replies: 1

Views: 2K

Graduate What is the Purest Method for Measuring Low-Energy Particle Momentum?

Jul 14, 2005 · Replies 4 · Jul 15, 2005

Replies: 4

Views: 5K

Graduate QFTs & Epsilons: Unraveling Beta Functions in Dim Reg

Jul 7, 2005 · Replies 1 · Jul 14, 2005

Replies: 1

Views: 4K

Graduate How Does Planck's Quantised Energy Theory Address the Ultraviolet Catastrophe?

Jul 14, 2005 · Replies 5 · Jul 14, 2005

Replies: 5

Views: 4K

Graduate Experimental Tests of Projection Postulate

Jul 7, 2005 · Replies 48 · Jul 14, 2005

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Replies: 48

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Graduate What are the fundamental objects in Quantum Field Theory?

Jul 4, 2005 · Replies 7 · Jul 13, 2005

Replies: 7

Views: 5K

Undergrad Cerenkov Radiation/Cerenkov Light

Jul 13, 2005 · Replies 3 · Jul 13, 2005

Replies: 3

Views: 3K

Undergrad How Can We Compare the Frequency and Wavelength of Gamma Rays and Visible Light?

Jul 13, 2005 · Replies 3 · Jul 13, 2005

Replies: 3

Views: 6K

Graduate Understanding Quantum Entanglement: Incompatible Observables

Jul 12, 2005 · Replies 14 · Jul 13, 2005

Replies: 14

Views: 2K

Graduate Schrödinger equation and equivalence principle

Jul 6, 2005 · Replies 17 · Jul 11, 2005

Replies: 17

Views: 5K

Graduate Relational Solution of Measurement Problem?

Jun 30, 2005 · Replies 2 · Jul 11, 2005

Replies: 2

Views: 2K

Graduate What's the explanation of W+/e+ decay?

Jul 10, 2005 · Replies 4 · Jul 11, 2005

Replies: 4

Views: 4K

Graduate Measuring Particle Mass: Is Charge a Constant Property?

Jul 10, 2005 · Replies 8 · Jul 10, 2005

Replies: 8

Views: 3K

Graduate Laughlins theory of emergence?

Jul 7, 2005 · Replies 11 · Jul 10, 2005

Replies: 11

Views: 3K

Graduate How Does the EPR Paradox Challenge Our Understanding of Quantum Spin?

Jul 8, 2005 · Replies 5 · Jul 10, 2005

Replies: 5

Views: 3K

Graduate Debunking the Myths of Teleportation: The Truth Behind Quantum State Transfer

Jul 10, 2005 · Replies 2 · Jul 10, 2005

Replies: 2

Views: 2K

Graduate Can Black Holes Swallow Quantum Numbers? Investigating the Entropy Problem

Jul 9, 2005 · Replies 4 · Jul 10, 2005

Replies: 4

Views: 2K

Graduate An impossible quantum theory of everything?

Jul 7, 2005 · Replies 5 · Jul 9, 2005

Replies: 5

Views: 5K

Graduate Pointlike particles and the emergence of classicality

Jul 8, 2005 · Replies 3 · Jul 8, 2005

Replies: 3

Views: 2K

Graduate On the definition of reallity by EPR

Jul 5, 2005 · Replies 7 · Jul 8, 2005

Replies: 7

Views: 2K

Graduate Effect of wormholes on photons, ect.

Jul 4, 2005 · Replies 3 · Jul 7, 2005

Replies: 3

Views: 2K

Undergrad Is the lifetime of the Z0 particle too short to be directly observed?

Jun 30, 2005 · Replies 20 · Jul 5, 2005

Replies: 20

Views: 7K

Graduate Pertaining to the properties of electromagnetic radiation/ quanta

Jul 2, 2005 · Replies 10 · Jul 5, 2005

Replies: 10

Views: 3K

Graduate Is Reality an Illusion of Matter and Space?

May 11, 2005 · Replies 18 · Jul 4, 2005

Replies: 18

Views: 8K

Graduate Matrix associated to a vector (how?)

Jun 29, 2005 · Replies 6 · Jul 4, 2005

Replies: 6

Views: 4K

Graduate What is the distribution of energy for beta-minus decay?

Jul 1, 2005 · Replies 4 · Jul 4, 2005

Replies: 4

Views: 6K

Graduate Quantum Tunneling: Explained, Theories & Answers

Jul 2, 2005 · Replies 6 · Jul 3, 2005

Replies: 6

Views: 2K

Graduate Experimental Setup Ideas for Simple Cyclotron Particle Accelerators

Jun 25, 2005 · Replies 1 · Jul 2, 2005

Replies: 1

Views: 3K

Can Quanta Change Color?

Jun 20, 2005 · Replies 51 · Jul 2, 2005

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Replies: 51

Views: 9K

Graduate Where does the wave function of an atom collapse in the photoelectric effect?

Jun 24, 2005 · Replies 2 · Jul 2, 2005

Replies: 2

Views: 2K

Graduate Understanding Einstein's photoelectric effect paper

Jun 28, 2005 · Replies 3 · Jul 2, 2005

Replies: 3

Views: 7K

Graduate Is a Local Potential Always Diagonal in Quantum Mechanics?

Jun 25, 2005 · Replies 2 · Jul 2, 2005

Replies: 2

Views: 2K

Graduate LSZ Representation: A Simple Explanation

Jun 26, 2005 · Replies 5 · Jun 30, 2005

Replies: 5

Views: 4K

Undergrad What is meant by molecular temperature ?

Jun 23, 2005 · Replies 18 · Jun 30, 2005

Replies: 18

Views: 10K

Graduate Observables in Quanum Mechanics

Jun 26, 2005 · Replies 10 · Jun 29, 2005

Replies: 10

Views: 3K

Graduate What is the EPR paradox and how does it relate to entanglement?

Jun 22, 2005 · Replies 2 · Jun 29, 2005

Replies: 2

Views: 2K

What is the Hans Bethe website about?

Jun 28, 2005 · Replies 5 · Jun 29, 2005

Replies: 5

Views: 2K

Graduate What is the physical mass and coupling?

Jun 22, 2005 · Replies 11 · Jun 29, 2005

Replies: 11

Views: 4K

Graduate Uncertainty and the Speed of Light

Jun 29, 2005 · Replies 5 · Jun 29, 2005

Replies: 5

Views: 4K

Graduate Proving Scalar Operator: Laplacian in 4 Dimensions

Jun 28, 2005 · Replies 4 · Jun 28, 2005

Replies: 4

Views: 9K

Graduate Could a quantum computer perform the tasks of a regular computer?

Jun 28, 2005 · Replies 2 · Jun 28, 2005

Replies: 2

Views: 6K

Graduate Understanding Potential Wells: Finite vs. Unbounded

Jun 20, 2005 · Replies 2 · Jun 27, 2005

Replies: 2

Views: 2K

Graduate Everett and Born: Impossible Possibilities from Quantum Theory

May 3, 2005 · Replies 15 · Jun 27, 2005

Replies: 15

Views: 3K

Graduate New model permits time travel

Jun 20, 2005 · Replies 2 · Jun 27, 2005

Replies: 2

Views: 2K

Graduate Expectation value of following function

Jun 25, 2005 · Replies 3 · Jun 26, 2005

Replies: 3

Views: 3K

Graduate Learning Quantum Mechanics: Classical vs Operator Based

Jun 8, 2005 · Replies 44 · Jun 26, 2005

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Replies: 44

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Graduate Wave-Particle Duality: Always Both, Never Isolated

Jun 24, 2005 · Replies 5 · Jun 26, 2005

Replies: 5

Views: 2K

Graduate Wave function of a free particle

Jun 17, 2005 · Replies 2 · Jun 24, 2005

Replies: 2

Views: 7K

Graduate What Is a Postulate in Quantum Mechanics?

Jun 24, 2005 · Replies 2 · Jun 24, 2005

Replies: 2

Views: 4K

Graduate Pure and not pure states, an example

Jun 23, 2005 · Replies 4 · Jun 23, 2005

Replies: 4

Views: 4K

Graduate Commutation (Ehrenfest?) relations

Jun 21, 2005 · Replies 6 · Jun 23, 2005

Replies: 6

Views: 4K

Graduate How to compute the number of loops in a Feynman diagram?

Jun 22, 2005 · Replies 6 · Jun 23, 2005

Replies: 6

Views: 5K

Graduate Timeflow, light, spatial speed, quarks & anti-matter questions

Jun 23, 2005 · Replies 4 · Jun 23, 2005

Replies: 4

Views: 4K

Graduate Is the Manifold of Eigenfunctions in Quantum Mechanics a Valid Concept?

Feb 24, 2005 · Replies 8 · Jun 23, 2005

Replies: 8

Views: 3K

Graduate Why are dimension > 4 operators non-renormalizable?

Jun 22, 2005 · Replies 2 · Jun 22, 2005

Replies: 2

Views: 5K

Graduate Can the history of a particle be traced in principal?

Jun 21, 2005 · Replies 5 · Jun 22, 2005

Replies: 5

Views: 2K

Graduate Quantum measurement problem paper

Jun 15, 2005 · Replies 2 · Jun 22, 2005

Replies: 2

Views: 3K

Graduate Question that’s killing me this evening…

Jun 18, 2005 · Replies 19 · Jun 22, 2005

Replies: 19

Views: 4K

Undergrad Effect of EMP on electrons. And other EMP related questions.

Jun 17, 2005 · Replies 10 · Jun 21, 2005

Replies: 10

Views: 3K

Graduate New to QM, with questions relating to GR

Jun 18, 2005 · Replies 9 · Jun 21, 2005

Replies: 9

Views: 4K

Graduate Unraveling the Mystery of Neutron Decay: A Fundamental QFT Explanation

Jun 20, 2005 · Replies 21 · Jun 21, 2005

Replies: 21

Views: 6K

Graduate Do you know what this particular unitary operator is?

Jun 21, 2005 · Replies 7 · Jun 21, 2005

Replies: 7

Views: 3K

Graduate Why Does the Heisenberg Uncertainty Principle Affect Electron Behavior in Atoms?

Jun 8, 2005 · Replies 21 · Jun 21, 2005

Replies: 21

Views: 4K

Graduate A budweiser beer (the phase operator)

Jun 12, 2005 · Replies 2 · Jun 20, 2005

Replies: 2

Views: 3K

Books to Help a Newbie - Don't Hold Back!

May 24, 2005 · Replies 9 · Jun 20, 2005

Replies: 9

Views: 3K

Graduate Looking for a QFT Exercise Buddy: A Grad Student's Quest for Mastery

Jun 20, 2005 · Replies 2 · Jun 20, 2005

Replies: 2

Views: 2K

Graduate Einstein-De Hass Effect: Explained and Explored | Research Project Guide

Jun 16, 2005 · Replies 4 · Jun 20, 2005

Replies: 4

Views: 4K

High School What If Light Could Travel Slower?

Jun 19, 2005 · Replies 9 · Jun 20, 2005

Replies: 9

Views: 3K

Graduate Single Slit Exp: Electron Behavior - Not "Finger of God

Jun 18, 2005 · Replies 2 · Jun 19, 2005

Replies: 2

Views: 3K

Graduate Explaining Hawking Radiation in Detail

Jun 11, 2005 · Replies 2 · Jun 18, 2005

Replies: 2

Views: 3K

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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