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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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Undergrad Is Light Truly Weightless in the Realm of Physics?

Jan 4, 2005 · Replies 2 · Jan 11, 2005

Replies: 2

Views: 2K

Graduate Light Reflectance: Explaining Specular Reflection

Jan 3, 2005 · Replies 2 · Jan 10, 2005

Replies: 2

Views: 3K

Graduate Is Dirac Notation Standard in QM?

Jan 3, 2005 · Replies 2 · Jan 10, 2005

Replies: 2

Views: 3K

Graduate Capacitor plates and tunneling current

Jan 9, 2005 · Replies 4 · Jan 10, 2005

Replies: 4

Views: 6K

High School Is Space Really a Vacuum and Does it Determine the Size of the Universe?

Jan 9, 2005 · Replies 3 · Jan 10, 2005

Replies: 3

Views: 3K

Graduate Retiring, Needing Help With Basics of Metaphysics and Physics

Dec 20, 2004 · Replies 18 · Jan 10, 2005

Replies: 18

Views: 5K

Graduate Photoelectric effect and moving from A to B

Jan 8, 2005 · Replies 6 · Jan 9, 2005

Replies: 6

Views: 2K

Undergrad Uncertainty Principal and calculating the future :p (Question)

Jan 7, 2005 · Replies 8 · Jan 9, 2005

Replies: 8

Views: 3K

Natural selection acts on the quantum world

Dec 28, 2004 · Replies 6 · Jan 9, 2005

Replies: 6

Views: 3K

Graduate Understanding Helicity in Quantum Mechanics: Explained by a Scientist

Jan 8, 2005 · Replies 11 · Jan 9, 2005

Replies: 11

Views: 13K

Graduate I cann't undestand Quantum Algorithms. How I can?

Jan 6, 2005 · Replies 2 · Jan 8, 2005

Replies: 2

Views: 3K

Graduate Barrier Tunneling in Scanning Tunneling Microscope: Q&A

Jan 8, 2005 · Replies 2 · Jan 8, 2005

Replies: 2

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Graduate Ew quark/anti quark pops into existence

Jan 7, 2005 · Replies 4 · Jan 7, 2005

Replies: 4

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Graduate Is the Moon There When Nobody Looks?

Jan 3, 2005 · Replies 15 · Jan 7, 2005

Replies: 15

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Graduate The universal quantum logic matrix

Jan 2, 2005 · Replies 13 · Jan 6, 2005

Replies: 13

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Graduate Can someone recommend books about QFT?

Jan 4, 2005 · Replies 6 · Jan 5, 2005

Replies: 6

Views: 3K

Graduate Fourier transorm problem has me stumped

Jan 4, 2005 · Replies 3 · Jan 5, 2005

Replies: 3

Views: 2K

Undergrad Superconductivity and magnetic fields

Jan 4, 2005 · Replies 5 · Jan 5, 2005

Replies: 5

Views: 2K

Graduate How do we define observe in QM?

Dec 18, 2004 · Replies 6 · Jan 5, 2005

Replies: 6

Views: 4K

Graduate Question(s) related to Nonlinear Shroedinger Model

Jan 4, 2005 · Replies 6 · Jan 4, 2005

Replies: 6

Views: 2K

Graduate Answer for schrodinger cat paradox

Dec 27, 2004 · Replies 7 · Jan 4, 2005

Replies: 7

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Graduate Questions on An Introduction to Quantum Field Theory by Peskin and Schroeder

Dec 29, 2004 · Replies 5 · Jan 4, 2005

Replies: 5

Views: 7K

Understanding Quantum Physics Simplified - A Layperson's Guide

Dec 28, 2004 · Replies 2 · Jan 4, 2005

Replies: 2

Views: 4K

Graduate Spin Up & Spin Down in Quantum Mechanics

Jan 3, 2005 · Replies 9 · Jan 4, 2005

Replies: 9

Views: 5K

Graduate How does EPR and entanglement theory are related?

Dec 28, 2004 · Replies 4 · Jan 4, 2005

Replies: 4

Views: 3K

Graduate What frame of reference is used to measure particle momentum in QM?

Jan 1, 2005 · Replies 3 · Jan 4, 2005

Replies: 3

Views: 2K

Graduate Why is it that all the potentials that we use in QM are classical ?

Jan 3, 2005 · Replies 2 · Jan 3, 2005

Replies: 2

Views: 3K

Undergrad Hydrogen Spectra: Lyman, Balmer, Paschen, Brackett Series

May 21, 2004 · Replies 14 · Jan 3, 2005

Replies: 14

Views: 4K

Graduate Connection between path, particle and space

Jan 2, 2005 · Replies 4 · Jan 3, 2005

Replies: 4

Views: 2K

Graduate How does the momentum of photons relate to E=mc² and Ep=hf?

Dec 27, 2004 · Replies 5 · Jan 2, 2005

Replies: 5

Views: 10K

Undergrad Lasers & Photons: Stimulated Emission Explained

Dec 4, 2004 · Replies 13 · Jan 2, 2005

Replies: 13

Views: 4K

Graduate Can Extra Dimensions and Plank Lengths Explain Quantum Orbital Shifts?

Dec 29, 2004 · Replies 9 · Dec 31, 2004

Replies: 9

Views: 4K

Graduate Unveiling the Mysteries of Vacuum: Insights from a Spanish Physicist

Dec 27, 2004 · Replies 3 · Dec 30, 2004

Replies: 3

Views: 2K

Graduate Is Consciousness Influenced by Quantum Nonlocality?

Dec 23, 2004 · Replies 2 · Dec 30, 2004

Replies: 2

Views: 3K

Graduate Is optical conductivity in solids the key to creating a light redirecting field?

Dec 9, 2004 · Replies 12 · Dec 29, 2004

Replies: 12

Views: 3K

Undergrad Speed of light is the highest possible speed

Dec 26, 2004 · Replies 5 · Dec 29, 2004

Replies: 5

Views: 15K

Graduate Feynman's formulation is manifestly non-relativistic

Dec 28, 2004 · Replies 3 · Dec 28, 2004

Replies: 3

Views: 2K

Graduate Graviton Effects in Different Media: Investigating the Variations

Dec 4, 2004 · Replies 30 · Dec 28, 2004

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Replies: 30

Views: 7K

Graduate Learning the harmonic oscilator

Dec 15, 2004 · Replies 9 · Dec 28, 2004

Replies: 9

Views: 4K

Quantum Mechanics History: Online Reading

Dec 20, 2004 · Replies 2 · Dec 27, 2004

Replies: 2

Views: 3K

Graduate What is the connection between wave-particle duality and quantum uncertainty?

Dec 17, 2004 · Replies 6 · Dec 27, 2004

Replies: 6

Views: 3K

Graduate What math is needed for a basic understanding of quantum mechanics?

Dec 25, 2004 · Replies 4 · Dec 27, 2004

Replies: 4

Views: 4K

Undergrad Understanding Angular Momentum Addition: A Brief Overview

Dec 27, 2004 · Replies 2 · Dec 27, 2004

Replies: 2

Views: 3K

Graduate When a Black hole is made is ther a certain amount of time needed for

Dec 19, 2004 · Replies 2 · Dec 26, 2004

Replies: 2

Views: 2K

Graduate Is Gravity an Attractive Force?

Dec 18, 2004 · Replies 2 · Dec 25, 2004

Replies: 2

Views: 6K

Graduate Accelerated electrons emitting radiation

Dec 9, 2004 · Replies 42 · Dec 25, 2004

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Replies: 42

Views: 9K

Graduate Probability in quantum mechanics

Dec 11, 2004 · Replies 10 · Dec 25, 2004

Replies: 10

Views: 4K

Graduate Can You Resolve Something for Me?

Dec 23, 2004 · Replies 5 · Dec 24, 2004

Replies: 5

Views: 3K

Graduate Quantum Entanglement: Moving Atoms Across Locations

Dec 21, 2004 · Replies 17 · Dec 24, 2004

Replies: 17

Views: 3K

Graduate Limitations on radial wavefunction for electron in an atom

Dec 16, 2004 · Replies 2 · Dec 23, 2004

Replies: 2

Views: 5K

Undergrad Can I Model Quantum Gate Operations with Excel and MathCad?

Dec 15, 2004 · Replies 2 · Dec 22, 2004

Replies: 2

Views: 3K

Graduate Equating E=mc^2 & E=hf: A Derivation of de Broglie's Theorem

Dec 15, 2004 · Replies 2 · Dec 22, 2004

Replies: 2

Views: 3K

Graduate How Are Yang-Mills Theory and Gauge Theory Related?

Dec 14, 2004 · Replies 2 · Dec 21, 2004

Replies: 2

Views: 3K

Graduate Some general questions for those who like a challenge

Dec 20, 2004 · Replies 15 · Dec 21, 2004

Replies: 15

Views: 4K

Graduate Lz: A Convenient but Arbitrary Choice in Quantum Mechanics

Dec 19, 2004 · Replies 2 · Dec 19, 2004

Replies: 2

Views: 4K

Undergrad Solving Puzzling Math Problem: Bracketed Term = 0

Dec 16, 2004 · Replies 2 · Dec 19, 2004

Replies: 2

Views: 2K

Graduate Derive a formula for blackbody radiation

Dec 11, 2004 · Replies 10 · Dec 18, 2004

Replies: 10

Views: 4K

Graduate Strange Spam Email (The Limitation of the Photon Hypothesis)

Dec 17, 2004 · Replies 2 · Dec 18, 2004

Replies: 2

Views: 2K

Graduate Gravity, its speed, and how it relates to light?

Dec 9, 2004 · Replies 4 · Dec 18, 2004

Replies: 4

Views: 4K

High School The purpose of Plank's constant

Dec 17, 2004 · Replies 3 · Dec 18, 2004

Replies: 3

Views: 7K

Graduate Quantum Mechanics in the Macroscopic World

Dec 16, 2004 · Replies 5 · Dec 17, 2004

Replies: 5

Views: 6K

High School Blackbody Radiation: An Overview

Dec 17, 2004 · Replies 4 · Dec 17, 2004

Replies: 4

Views: 4K

Graduate The Nature of Probability Waves

Nov 10, 2004 · Replies 4 · Dec 16, 2004

Replies: 4

Views: 2K

Graduate Quantum Universe: Modal Logic Approach to Preferred Bases

Dec 9, 2004 · Replies 2 · Dec 16, 2004

Replies: 2

Views: 2K

Graduate Understanding <q|p>=exp(ip.x): The Explanation You've Been Searching For

Dec 16, 2004 · Replies 3 · Dec 16, 2004

Replies: 3

Views: 3K

Graduate Fermi Level & Equilibrium Conditions in Semiconductor Physics

Dec 9, 2004 · Replies 2 · Dec 16, 2004

Replies: 2

Views: 8K

Graduate Quantum intersesting questions

Dec 4, 2004 · Replies 2 · Dec 16, 2004

Replies: 2

Views: 2K

Graduate Do Higgs particles have the same mass and short lifetimes as other particles?

Jul 20, 2004 · Replies 6 · Dec 16, 2004

Replies: 6

Views: 5K

Graduate What is Decoherence and How Does It Solve Schrodinger's Cat Paradox?

Dec 14, 2004 · Replies 17 · Dec 15, 2004

Replies: 17

Views: 5K

Graduate What Are Stationary States in Quantum Mechanics?

Dec 11, 2004 · Replies 10 · Dec 15, 2004

Replies: 10

Views: 7K

Graduate Complex amplitude,Feynman diagrams

Dec 8, 2004 · Replies 2 · Dec 15, 2004

Replies: 2

Views: 6K

Graduate Time and Space: Illusions or Truths?

Dec 8, 2004 · Replies 6 · Dec 15, 2004

Replies: 6

Views: 3K

Graduate Wavefunctions space in Quantum Physics

Dec 13, 2004 · Replies 11 · Dec 14, 2004

Replies: 11

Views: 3K

Graduate What is ASE and What Does Measuring its Spectrum Tell Us?

Dec 7, 2004 · Replies 2 · Dec 14, 2004

Replies: 2

Views: 3K

Graduate How is the Tensor Product Defined and Used in Vector Spaces?

Dec 8, 2004 · Replies 4 · Dec 13, 2004

Replies: 4

Views: 3K

Graduate Is Spin 1/2 Really That Difficult to Understand?

Dec 11, 2004 · Replies 7 · Dec 12, 2004

Replies: 7

Views: 3K

Graduate Math and Quantum Theory Assistance on a Forum: Tips for Entering Formulas

Dec 4, 2004 · Replies 2 · Dec 11, 2004

Replies: 2

Views: 2K

Graduate Perturbation and Variational Theory

Dec 4, 2004 · Replies 2 · Dec 11, 2004

Replies: 2

Views: 3K

Graduate Using a weight function for inner product/normalization

Nov 28, 2004 · Replies 5 · Dec 11, 2004

Replies: 5

Views: 4K

High School Is There Energy in Magnetic Fields?

Jun 26, 2004 · Replies 5 · Dec 10, 2004

Replies: 5

Views: 11K

Graduate QM field separation principle

Dec 9, 2004 · Replies 2 · Dec 9, 2004

Replies: 2

Views: 2K

Undergrad Atomic Structure: Explaining n=6 Shell & Largest Angular Momentum Quantum Number

Dec 2, 2004 · Replies 2 · Dec 9, 2004

Replies: 2

Views: 3K

Graduate Photoelectric effect - scattering differential cross section

Dec 7, 2004 · Replies 3 · Dec 9, 2004

Replies: 3

Views: 9K

Graduate Solving Ladderoperator Problem for c_+ Expressed in j and m

Dec 8, 2004 · Replies 3 · Dec 9, 2004

Replies: 3

Views: 2K

Graduate Classical Tunneling: Instantons Explained

Dec 6, 2004 · Replies 3 · Dec 8, 2004

Replies: 3

Views: 3K

Graduate Quark confinement in early universe

Dec 1, 2004 · Replies 2 · Dec 8, 2004

Replies: 2

Views: 2K

Graduate Is the Formula for Calculating Cross Sections in Quantum Mechanics Correct?

Dec 2, 2004 · Replies 9 · Dec 7, 2004

Replies: 9

Views: 3K

Graduate How is the wavefunction defined in the double slit experiment for electrons?

Dec 7, 2004 · Replies 2 · Dec 7, 2004

Replies: 2

Views: 2K

Graduate What Makes Quantum Entanglement So Spooky?

Dec 5, 2004 · Replies 12 · Dec 7, 2004

Replies: 12

Views: 8K

Graduate Photon Question: Attraction and Repulsion

Nov 26, 2004 · Replies 7 · Dec 7, 2004

Replies: 7

Views: 2K

High School Understanding Heat and Molecular Vibration: Causes and Confusion Explained - Ty

Nov 30, 2004 · Replies 2 · Dec 7, 2004

Replies: 2

Views: 2K

Graduate Quantum Mechanics & F=ma: What Replaces F=ma in Atoms?

Dec 4, 2004 · Replies 7 · Dec 7, 2004

Replies: 7

Views: 3K

Graduate Why Does the Expectation Value Depend on the Space Used?

Nov 24, 2004 · Replies 8 · Dec 6, 2004

Replies: 8

Views: 4K

Graduate Momentum probability Distribution

Dec 6, 2004 · Replies 5 · Dec 6, 2004

Replies: 5

Views: 19K

Graduate From the Schrödinger equation to the wavepacket reduction axiom

Nov 30, 2004 · Replies 2 · Dec 6, 2004

Replies: 2

Views: 2K

Graduate Quantum Numbers: Meaning & Significance

Nov 28, 2004 · Replies 2 · Dec 5, 2004

Replies: 2

Views: 3K

Graduate The Causality Problem and Tunneling: An Overview

Dec 5, 2004 · Replies 3 · Dec 5, 2004

Replies: 3

Views: 2K

Graduate Quantum Mechanics vs Classical Theory: Applying Them to Different Scales

Nov 30, 2004 · Replies 9 · Dec 5, 2004

Replies: 9

Views: 2K

Graduate What is the role of canonical momentum in quantum mechanics?

Nov 18, 2004 · Replies 28 · Dec 4, 2004

Replies: 28

Views: 18K

Graduate Why must the solution to the hydrogen atom's angular equation only be one term?

Dec 2, 2004 · Replies 10 · Dec 3, 2004

Replies: 10

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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