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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

I Question about discussions around quantum interpretations

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Photon vs the electric field E and magnetic field B

Apr 7, 2011 · Replies 6 · Apr 13, 2011

Replies: 6

Views: 4K

Why we know the renormalization work to all order in renormalizable theory?

Apr 7, 2011 · Replies 6 · Apr 13, 2011

Replies: 6

Views: 3K

Why do bosons prefer to occupy the same ground state?

Apr 11, 2011 · Replies 10 · Apr 12, 2011

Replies: 10

Views: 6K

Renormalization as a dielectric

Apr 12, 2011 · Replies 1 · Apr 12, 2011

Replies: 1

Views: 1K

Laser Light & HUP: Understanding How Position & Momentum Affect Each Other

Apr 7, 2011 · Replies 3 · Apr 12, 2011

Replies: 3

Views: 2K

Can someone explain, simply, hidden nonlocality/locality? EPR Paradox?

Apr 12, 2011 · Replies 23 · Apr 12, 2011

Replies: 23

Views: 6K

What is the significance of the Klein Paradox in particle physics?

Apr 12, 2011 · Replies 1 · Apr 12, 2011

Replies: 1

Views: 3K

Average of momentum for stationary state

Apr 10, 2011 · Replies 5 · Apr 11, 2011

Replies: 5

Views: 3K

Weight diagrams and Lie algebras

Apr 11, 2011 · Replies 2 · Apr 11, 2011

Replies: 2

Views: 3K

Why isn't commutation transitive?

Apr 10, 2011 · Replies 4 · Apr 11, 2011

Replies: 4

Views: 5K

Wavevector in infinite square well

Apr 10, 2011 · Replies 4 · Apr 11, 2011

Replies: 4

Views: 2K

[Novice] Young's Double Slit Experiment and the Quantum Cult

Apr 11, 2011 · Replies 1 · Apr 11, 2011

Replies: 1

Views: 2K

1st to 2nd quantization, potential approximates interactions?

Mar 24, 2011 · Replies 12 · Apr 11, 2011

Replies: 12

Views: 3K

Probability density of photons

Mar 28, 2011 · Replies 17 · Apr 11, 2011

Replies: 17

Views: 5K

What Determines the Equilibrium Separation Between Atoms in a Lattice?

Apr 8, 2011 · Replies 3 · Apr 10, 2011

Replies: 3

Views: 4K

Bell's Theorem, EPRB, QM, spin-1/2 particles, basic arithmetic: In reply

Apr 7, 2011 · Replies 21 · Apr 10, 2011

Replies: 21

Views: 6K

How can polarisation by angle 45 degrees be represented in quantum mechanics?

Apr 3, 2011 · Replies 12 · Apr 10, 2011

Replies: 12

Views: 3K

Role of particle's diameter in Quantum Mechanics

Apr 9, 2011 · Replies 7 · Apr 10, 2011

Replies: 7

Views: 3K

What Happens to Wave-Particles During Wavefunction Collapse?

Apr 10, 2011 · Replies 7 · Apr 10, 2011

Replies: 7

Views: 3K

Polarizability and permittivity

Apr 9, 2011 · Replies 3 · Apr 10, 2011

Replies: 3

Views: 3K

Can Earth's Electromagnetic field block asteroids?

Apr 10, 2011 · Replies 1 · Apr 10, 2011

Replies: 1

Views: 2K

What Are Clebsch Gordan Coordinates in Quantum Mechanics?

Apr 9, 2011 · Replies 2 · Apr 9, 2011

Replies: 2

Views: 2K

Particle in abox : continuous functions problem

Apr 9, 2011 · Replies 3 · Apr 9, 2011

Replies: 3

Views: 2K

Quantum fluctuations and Inflation

Apr 8, 2011 · Replies 1 · Apr 9, 2011

Replies: 1

Views: 3K

Buckyball Double Slit Experiment

Apr 5, 2011 · Replies 22 · Apr 8, 2011

Replies: 22

Views: 27K

Idler behavior post signal detection in DCQE

Apr 8, 2011 · Replies 1 · Apr 8, 2011

Replies: 1

Views: 2K

Bell's theorem and the DrChinese Challenge?

Apr 4, 2011 · Replies 16 · Apr 8, 2011

Replies: 16

Views: 5K

Pure State without Superposition possible?

Apr 8, 2011 · Replies 1 · Apr 8, 2011

Replies: 1

Views: 2K

What Causes Electrons to Emit Light?

Apr 8, 2011 · Replies 1 · Apr 8, 2011

Replies: 1

Views: 2K

How to reach the conclusion that L=0 and S=0 if the shell is filled?

Apr 8, 2011 · Replies 1 · Apr 8, 2011

Replies: 1

Views: 2K

What Are Commutators and Their Role in Quantum Mechanics?

Apr 7, 2011 · Replies 4 · Apr 8, 2011

Replies: 4

Views: 2K

Review Articles Bell Test experiments

Apr 7, 2011 · Replies 2 · Apr 8, 2011

Replies: 2

Views: 2K

Understanding Atom-Photon Interaction: How Long Will an Electron Hold Energy?

Apr 6, 2011 · Replies 3 · Apr 7, 2011

Replies: 3

Views: 3K

Can the Lippmann-Schwinger equation be integrated over negative r values?

Apr 7, 2011 · Replies 1 · Apr 7, 2011

Replies: 1

Views: 3K

Are Chemical Reactions Quantumly Indeterminate?

Apr 4, 2011 · Replies 7 · Apr 7, 2011

Replies: 7

Views: 3K

Why dont the quarks in neutrons annhialate?

Apr 7, 2011 · Replies 1 · Apr 7, 2011

Replies: 1

Views: 2K

Speed of free electrons in vacuum, plasma and superconductors?

Dec 17, 2009 · Replies 15 · Apr 7, 2011

Replies: 15

Views: 15K

Electron diffraction from crystals

Apr 6, 2011 · Replies 3 · Apr 7, 2011

Replies: 3

Views: 2K

Why Is It Called Space Quantization in Quantum Mechanics?

Apr 3, 2011 · Replies 13 · Apr 7, 2011

Replies: 13

Views: 18K

Stochastics mechanics and early Universe

Apr 5, 2011 · Replies 2 · Apr 7, 2011

Replies: 2

Views: 2K

Understanding 2nd Order Correlation in Fock States and Density Functions

Apr 6, 2011 · Replies 3 · Apr 7, 2011

Replies: 3

Views: 2K

Understanding the Energy Differences: Rigid Rotors vs. Harmonic Oscillators

Apr 6, 2011 · Replies 3 · Apr 6, 2011

Replies: 3

Views: 3K

Understanding the Significance of 'Square' in Quantum Mechanics Potentials

Apr 5, 2011 · Replies 6 · Apr 6, 2011

Replies: 6

Views: 4K

Why 2-point correlation function diagram have only two external legs?

Apr 5, 2011 · Replies 2 · Apr 6, 2011

Replies: 2

Views: 2K

Understanding Quantized Conductance in Nano-sized Objects

Apr 6, 2011 · Replies 1 · Apr 6, 2011

Replies: 1

Views: 2K

What is Wavefunction Normalization?

Apr 5, 2011 · Replies 6 · Apr 6, 2011

Replies: 6

Views: 4K

Find Complex Conjugate of Wave Function in QM Mechanics Book

Apr 5, 2011 · Replies 6 · Apr 6, 2011

Replies: 6

Views: 3K

Even Real Particles don't exist Aage Bohr

Mar 31, 2011 · Replies 68 · Apr 5, 2011

3

Replies: 68

Views: 15K

Conceptual question on wave-particle duality (electron microscope)

Apr 5, 2011 · Replies 5 · Apr 5, 2011

Replies: 5

Views: 4K

Double-Slit Experiment and Michelson Interferometer

Apr 5, 2011 · Replies 1 · Apr 5, 2011

Replies: 1

Views: 4K

Absorbtion lines in spectrum question

Apr 4, 2011 · Replies 6 · Apr 5, 2011

Replies: 6

Views: 2K

What is a perturbation and how does it affect a system in equilibrium?

Apr 5, 2011 · Replies 1 · Apr 5, 2011

Replies: 1

Views: 2K

Balancing Objects: Quantum Rod, Tipping Rod & Quantum Pencil

Apr 5, 2011 · Replies 2 · Apr 5, 2011

Replies: 2

Views: 2K

Schrodinger Equation : Infinite Square Well

Feb 17, 2011 · Replies 5 · Apr 4, 2011

Replies: 5

Views: 7K

How Does Antisymmetry Define Electron States in Quantum Chemistry?

Apr 3, 2011 · Replies 5 · Apr 4, 2011

Replies: 5

Views: 2K

Sakurai's proof of the Optical Theorem

Apr 3, 2011 · Replies 4 · Apr 4, 2011

Replies: 4

Views: 6K

Bell's theorem and QM: Peres' conclusion and terminology?

Apr 3, 2011 · Replies 3 · Apr 4, 2011

Replies: 3

Views: 4K

Loop corrections to the propagator

Mar 3, 2010 · Replies 6 · Apr 4, 2011

Replies: 6

Views: 4K

QED Predictions of fine structure constant and g-factor

Apr 4, 2011 · Replies 1 · Apr 4, 2011

Replies: 1

Views: 2K

Ionization energy of electrons?

Mar 30, 2011 · Replies 6 · Apr 3, 2011

Replies: 6

Views: 6K

Explicit form for representing two spin 1/2 system

Apr 3, 2011 · Replies 1 · Apr 3, 2011

Replies: 1

Views: 2K

What's wrong with this local realistic counter-example to Bell's theorem?

Feb 22, 2011 · Replies 177 · Apr 2, 2011

6

Replies: 177

Views: 30K

Why is the lagrangian polynomial in fields and derivatives

Apr 2, 2011 · Replies 2 · Apr 2, 2011

Replies: 2

Views: 2K

Correspondence principle in arbitrary coordinates

Mar 31, 2011 · Replies 1 · Apr 2, 2011

Replies: 1

Views: 2K

How does diffraction cause interference

Mar 30, 2011 · Replies 1 · Apr 2, 2011

Replies: 1

Views: 4K

Is Light Capable of Being Polarized in Multiple Directions?

Apr 2, 2011 · Replies 3 · Apr 2, 2011

Replies: 3

Views: 3K

Free Electron Density of States question

Apr 1, 2011 · Replies 2 · Apr 2, 2011

Replies: 2

Views: 2K

Reflection of Light on Mirrors: Why & How?

Mar 31, 2011 · Replies 4 · Apr 2, 2011

Replies: 4

Views: 3K

Potential Wells: What Is a Potential Well & What Does Its Graph Tell Us?

Mar 28, 2011 · Replies 7 · Apr 2, 2011

Replies: 7

Views: 6K

Two Nature Articles - Quick Questions

Mar 31, 2011 · Replies 2 · Apr 2, 2011

Replies: 2

Views: 2K

Understanding Schur's Lemma in the Context of Free Particles

Mar 29, 2011 · Replies 18 · Apr 2, 2011

Replies: 18

Views: 6K

Why does the uncertainty principle imply randomness

Mar 31, 2011 · Replies 7 · Apr 1, 2011

Replies: 7

Views: 5K

Comparing Energy Transmitted by Light & Sound: Help Needed!

Apr 1, 2011 · Replies 6 · Apr 1, 2011

Replies: 6

Views: 2K

Consciousness: Objective - Subjective

Apr 1, 2011 · Replies 1 · Apr 1, 2011

Replies: 1

Views: 2K

Fermi's Golden Rule - Inelastic collision probability

Apr 1, 2011 · Replies 2 · Apr 1, 2011

Replies: 2

Views: 3K

Young Double Slit experiment, single photons

Mar 31, 2011 · Replies 5 · Apr 1, 2011

Replies: 5

Views: 4K

Lorentz invariant lagrangian density

Mar 31, 2011 · Replies 3 · Apr 1, 2011

Replies: 3

Views: 9K

Non-linear Operators: Physical Reasons Explained

Mar 31, 2011 · Replies 5 · Apr 1, 2011

Replies: 5

Views: 2K

Is Quantum Statistical Mechanics a Quantum Field Theory?

Mar 31, 2011 · Replies 2 · Apr 1, 2011

Replies: 2

Views: 3K

Infinite Charged Electron in QFT

Feb 28, 2011 · Replies 89 · Apr 1, 2011

3

Replies: 89

Views: 18K

Entangled Particle Communication (again)

Mar 31, 2011 · Replies 16 · Apr 1, 2011

Replies: 16

Views: 5K

Quantum Field Theory and Perturbation Approximation

Mar 27, 2011 · Replies 14 · Mar 31, 2011

Replies: 14

Views: 5K

How do electrons maintain a stable distance from the nucleus?

Mar 31, 2011 · Replies 4 · Mar 31, 2011

Replies: 4

Views: 2K

Exploring Shape Resonance in Air: Oxygen and Nitrogen

Mar 24, 2011 · Replies 4 · Mar 31, 2011

Replies: 4

Views: 3K

Understanding Eq (4.19) of Peskin-Schroeder

Mar 28, 2011 · Replies 3 · Mar 30, 2011

Replies: 3

Views: 3K

What oscillates in an electron?

Mar 30, 2011 · Replies 2 · Mar 30, 2011

Replies: 2

Views: 2K

Position of an electron with exactly 0 momentum

Mar 29, 2011 · Replies 11 · Mar 30, 2011

Replies: 11

Views: 3K

Why do massless particles have only two degrees of freedom?

Mar 28, 2011 · Replies 10 · Mar 30, 2011

Replies: 10

Views: 5K

An Interesting New Test of Realism

Mar 28, 2011 · Replies 10 · Mar 30, 2011

Replies: 10

Views: 3K

Another doubt in Peskin Schroeder Sec 4.2

Mar 29, 2011 · Replies 4 · Mar 30, 2011

Replies: 4

Views: 4K

Particles are really planck size?

Mar 27, 2011 · Replies 3 · Mar 29, 2011

Replies: 3

Views: 3K

Scattering of Light: Electron Excitation & Photon Absorption

Jun 5, 2009 · Replies 15 · Mar 29, 2011

Replies: 15

Views: 5K

Van der Waals Force: Questions Answered

Mar 27, 2011 · Replies 15 · Mar 29, 2011

Replies: 15

Views: 8K

How can the Casimir effect result in a repulsive force between solid materials?

Mar 15, 2011 · Replies 22 · Mar 29, 2011

Replies: 22

Views: 6K

Complex Conjugate applied to operators?

Mar 28, 2011 · Replies 1 · Mar 28, 2011

Replies: 1

Views: 4K

Photon Absorption: Atom, Transition Level, and Energy

Jul 11, 2007 · Replies 10 · Mar 28, 2011

Replies: 10

Views: 6K

A couple of entanglment questions

Mar 25, 2011 · Replies 2 · Mar 28, 2011

Replies: 2

Views: 2K

Do Wavefunctions Include All Possible Outcomes?

Feb 11, 2011 · Replies 40 · Mar 27, 2011

2

Replies: 40

Views: 8K

Difference Between Non-Seperability and Non-Locality?

Mar 24, 2011 · Replies 2 · Mar 27, 2011

Replies: 2

Views: 2K

Why Is the Divergence of a Diagram ln(lambda) When D=0?

Mar 27, 2011 · Replies 2 · Mar 27, 2011

Replies: 2

Views: 4K

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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