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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 Two Spin 1/2 Particles: Stot=0 Outcome?

Mar 11, 2005 · Replies 7 · Mar 12, 2005

Replies: 7

Views: 6K

Graduate Solving the Schrodinger Equation for 1D Electron Motion

Mar 10, 2005 · Replies 5 · Mar 11, 2005

Replies: 5

Views: 3K

Graduate Deriving Planck Length: Smallest Possible Length?

Mar 11, 2005 · Replies 1 · Mar 11, 2005

Replies: 1

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Graduate We all exhibit wave characteristics

Mar 10, 2005 · Replies 2 · Mar 10, 2005

Replies: 2

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Graduate Superposition of Eigenfunctions: Probability and Expectation Values

Mar 9, 2005 · Replies 2 · Mar 9, 2005

Replies: 2

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Graduate Photon Interactions: 4 Cases & Conditions

Feb 15, 2005 · Replies 23 · Mar 9, 2005

Replies: 23

Views: 13K

Graduate Role of observer and detection in uncertainty principle

Mar 7, 2005 · Replies 9 · Mar 9, 2005

Replies: 9

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Graduate A proposed definition of causality

Jan 19, 2005 · Replies 3 · Mar 9, 2005

Replies: 3

Views: 10K

Graduate Unlock the World of Quantum Mechanics: Top Book Recommendations for Beginners

Feb 25, 2005 · Replies 16 · Mar 9, 2005

Replies: 16

Views: 5K

Graduate What are the Eigenvalues and Eigenfunctions for the Operator \hat{Q}?

Mar 8, 2005 · Replies 12 · Mar 8, 2005

Replies: 12

Views: 3K

Hans Bethe: Nobel Physicist (1906-2005)

Mar 7, 2005 · Replies 7 · Mar 8, 2005

Replies: 7

Views: 3K

Graduate Question on Canonical Quantization

Mar 8, 2005 · Replies 2 · Mar 8, 2005

Replies: 2

Views: 3K

Graduate Is this superposition state an eigenstate of J^2 and L * S?

Mar 7, 2005 · Replies 4 · Mar 7, 2005

Replies: 4

Views: 2K

Undergrad Effect of heat on light radiation

Feb 23, 2005 · Replies 4 · Mar 7, 2005

Replies: 4

Views: 16K

Graduate Question about Schrodinger equation, potential and energy

Feb 28, 2005 · Replies 39 · Mar 7, 2005

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Replies: 39

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Graduate New look for Double-slit experiment

Mar 7, 2005 · Replies 3 · Mar 7, 2005

Replies: 3

Views: 3K

Graduate Calculating Normalization Constant for Wavefunction

Mar 6, 2005 · Replies 5 · Mar 7, 2005

Replies: 5

Views: 14K

Graduate Is Transverse Radiation of Light Still Relevant in Modern Physics?

Mar 4, 2005 · Replies 3 · Mar 6, 2005

Replies: 3

Views: 3K

Graduate Mixing Field and string theory?

Feb 27, 2005 · Replies 3 · Mar 6, 2005

Replies: 3

Views: 3K

Graduate Quantum mechanics of a particle

Mar 4, 2005 · Replies 9 · Mar 5, 2005

Replies: 9

Views: 4K

Graduate Is the Schrodinger Cat Paradox an Indication of a Fundamental Flaw in Science?

Mar 3, 2005 · Replies 18 · Mar 5, 2005

Replies: 18

Views: 5K

Graduate What are the limits on a true two-slit experiment?

Feb 20, 2005 · Replies 25 · Mar 5, 2005

Replies: 25

Views: 7K

Graduate Understanding the Probability Density Function of a Wave Function

Mar 3, 2005 · Replies 18 · Mar 4, 2005

Replies: 18

Views: 3K

Graduate Wormholes-Photons Arriving Before Being Sent

Dec 27, 2004 · Replies 5 · Mar 4, 2005

Replies: 5

Views: 4K

Graduate Schrodinger's Equation - Step Potential

Mar 3, 2005 · Replies 7 · Mar 4, 2005

Replies: 7

Views: 7K

Undergrad Double Sew Interference: Light Source Effect?

Mar 2, 2005 · Replies 3 · Mar 3, 2005

Replies: 3

Views: 3K

Graduate Finite Square Well Analysis: Odd Bound States & Scattering States

Mar 3, 2005 · Replies 5 · Mar 3, 2005

Replies: 5

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Graduate What Happens When an Electron Interacts with a Photon in an Empty Space?

Mar 3, 2005 · Replies 5 · Mar 3, 2005

Replies: 5

Views: 2K

Graduate Asking for answers to exercises of peskin's QFT?

Mar 1, 2005 · Replies 5 · Mar 2, 2005

Replies: 5

Views: 5K

Graduate QM: Potential Energy & Box: U(x) & Schrodinger EQ: \psi (x)

Mar 2, 2005 · Replies 11 · Mar 2, 2005

Replies: 11

Views: 2K

Graduate How Are Lasers and X-rays Connected in Quantum Mechanics?

Mar 1, 2005 · Replies 5 · Mar 2, 2005

Replies: 5

Views: 2K

Graduate Eigenenergies of finite square well

Mar 1, 2005 · Replies 3 · Mar 1, 2005

Replies: 3

Views: 5K

Graduate Finding Value of Phi*k(x) in Basis Function Method

Feb 28, 2005 · Replies 5 · Mar 1, 2005

Replies: 5

Views: 2K

Graduate Gravitational Potential of a Chargeless Particle Confined in a Box | Einstone

Feb 22, 2005 · Replies 12 · Mar 1, 2005

Replies: 12

Views: 3K

Graduate A delayed choice experiment with a paradox. What did I do wrong?

Feb 19, 2005 · Replies 29 · Mar 1, 2005

Replies: 29

Views: 7K

Graduate Maximum energy transefer in COmpton effect - rutherford

Feb 28, 2005 · Replies 2 · Feb 28, 2005

Replies: 2

Views: 3K

Graduate Heisenberg Uncertainty Principle and ions

Feb 21, 2005 · Replies 2 · Feb 28, 2005

Replies: 2

Views: 2K

Graduate Uncertainty vs. speed of light

Feb 22, 2005 · Replies 5 · Feb 27, 2005

Replies: 5

Views: 3K

Graduate Normalize the even wave functions for the finite square well

Feb 27, 2005 · Replies 9 · Feb 27, 2005

Replies: 9

Views: 7K

Undergrad Wave & Particle: What's the Difference?

Feb 26, 2005 · Replies 6 · Feb 27, 2005

Replies: 6

Views: 2K

Graduate How can you aim without knowing the precise position and velocity of a particle?

Feb 27, 2005 · Replies 5 · Feb 27, 2005

Replies: 5

Views: 2K

Graduate Can quantum theory be explained?

Dec 6, 2004 · Replies 84 · Feb 27, 2005

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Replies: 84

Views: 13K

Graduate Photon: The Force Carrier That Moves at Light Speed

Feb 26, 2005 · Replies 14 · Feb 27, 2005

Replies: 14

Views: 3K

Graduate Does the photoelectric effect influence the material properties of metals?

Feb 18, 2005 · Replies 4 · Feb 26, 2005

Replies: 4

Views: 3K

Live Feynman QED Lectures by Richard Feynman

Feb 18, 2005 · Replies 2 · Feb 25, 2005

Replies: 2

Views: 5K

Graduate Position and momentum (basic stuff)

Feb 24, 2005 · Replies 3 · Feb 25, 2005

Replies: 3

Views: 4K

Graduate Can photons be attracted to one another?

Feb 23, 2005 · Replies 20 · Feb 24, 2005

Replies: 20

Views: 5K

High School Deriving E=mc^2: A Basic Explanation

Feb 23, 2005 · Replies 10 · Feb 23, 2005

Replies: 10

Views: 3K

Graduate EPR Debate: Nature Agrees with Einstein

Jan 12, 2005 · Replies 143 · Feb 23, 2005

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Replies: 143

Views: 21K

Graduate Compton-scattering = Entanglement ?

Feb 12, 2005 · Replies 11 · Feb 23, 2005

Replies: 11

Views: 3K

Graduate Pauli exclusion principle - does it apply to everything

Feb 20, 2005 · Replies 18 · Feb 22, 2005

Replies: 18

Views: 4K

Graduate Understanding the Mass Ratios of Electrons and Neutrons in Atoms

Feb 17, 2005 · Replies 4 · Feb 22, 2005

Replies: 4

Views: 2K

Graduate Double slit intensity - QM description

Feb 3, 2005 · Replies 8 · Feb 22, 2005

Replies: 8

Views: 4K

Undergrad Introduction to the structure of matter

Feb 20, 2005 · Replies 7 · Feb 22, 2005

Replies: 7

Views: 6K

Graduate How Do Photons Relate to Classical Light Wave Theories?

Feb 14, 2005 · Replies 8 · Feb 21, 2005

Replies: 8

Views: 4K

Graduate Understanding the Mathematics of Locality and Nonlocality

Feb 18, 2005 · Replies 7 · Feb 21, 2005

Replies: 7

Views: 3K

Graduate Is the entire system of quantum observers and objects relatively linear?

Feb 19, 2005 · Replies 5 · Feb 20, 2005

Replies: 5

Views: 2K

Graduate Coupled Angular Momentum sates and probability

Feb 19, 2005 · Replies 3 · Feb 19, 2005

Replies: 3

Views: 4K

Graduate Can anyone Debunk this for me?

Feb 19, 2005 · Replies 3 · Feb 19, 2005

Replies: 3

Views: 3K

Graduate Are Quarks Really the Building Blocks of Matter?

Feb 18, 2005 · Replies 3 · Feb 18, 2005

Replies: 3

Views: 4K

Graduate Is Quantum Randomness Really Random?

Feb 18, 2005 · Replies 2 · Feb 18, 2005

Replies: 2

Views: 2K

Graduate Relative phase in infinite square well

Feb 18, 2005 · Replies 3 · Feb 18, 2005

Replies: 3

Views: 2K

Graduate Oscillating Molecule and Revolving Electron

Feb 17, 2005 · Replies 11 · Feb 18, 2005

Replies: 11

Views: 4K

Graduate Adiabatic Theorem: Finding Coefficient for State Transitions

Feb 11, 2005 · Replies 2 · Feb 18, 2005

Replies: 2

Views: 2K

Undergrad Are there an infinite number of energy levels in an atom?

Feb 9, 2005 · Replies 3 · Feb 17, 2005

Replies: 3

Views: 4K

Graduate The Particle-Wave Duality in Quantum Mechanics

Feb 15, 2005 · Replies 10 · Feb 16, 2005

Replies: 10

Views: 3K

Graduate How can we handle infinities in renormalizable theories?

Feb 9, 2005 · Replies 2 · Feb 16, 2005

Replies: 2

Views: 2K

Graduate Dirac's Postulations: A Scalar Function or Four-Dimensional Vector?

Feb 15, 2005 · Replies 4 · Feb 16, 2005

Replies: 4

Views: 2K

Undergrad Why we consider light to be massless?

Feb 12, 2005 · Replies 19 · Feb 15, 2005

Replies: 19

Views: 3K

Graduate Do Photons Truly Have Zero Mass in Quantum Mechanics?

Feb 12, 2005 · Replies 9 · Feb 15, 2005

Replies: 9

Views: 4K

Undergrad Are There Any Non-3D Objects in the Universe?

Feb 14, 2005 · Replies 5 · Feb 14, 2005

Replies: 5

Views: 3K

Graduate Is Dirac's equation valid for point charges?

Jan 24, 2005 · Replies 66 · Feb 14, 2005

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Replies: 66

Views: 8K

High School Light acts as a wave but travels in a staright line right

Feb 13, 2005 · Replies 4 · Feb 14, 2005

Replies: 4

Views: 5K

Undergrad What is a value of psi* for a particle in 1D box stationary state?

Feb 13, 2005 · Replies 4 · Feb 14, 2005

Replies: 4

Views: 4K

Poll

Graduate Poll: Where does unitary evolution happen?

Feb 13, 2005 · Replies 4 · Feb 13, 2005

Replies: 4

Views: 3K

Graduate Magnetic Repulsion between Proton and Electron in Hydrogen

Feb 9, 2005 · Replies 9 · Feb 13, 2005

Replies: 9

Views: 8K

Graduate Optical Emission - due to Acceleration or Oscillation

Feb 11, 2005 · Replies 11 · Feb 13, 2005

Replies: 11

Views: 2K

Graduate Hydrogen Atom probability question

Feb 6, 2005 · Replies 2 · Feb 13, 2005

Replies: 2

Views: 3K

Graduate I want to find the expectation value [tex]\langle x^2 \rangle[/tex] in

Feb 13, 2005 · Replies 4 · Feb 13, 2005

Replies: 4

Views: 3K

Graduate Zero Point Energy of Coupled Dipoles

Feb 10, 2005 · Replies 15 · Feb 12, 2005

Replies: 15

Views: 4K

Graduate Is Time an Observable in Quantum Mechanics?

Feb 12, 2005 · Replies 8 · Feb 12, 2005

Replies: 8

Views: 3K

Graduate The von Neumann Measurement Process: Explained and Explored

Feb 11, 2005 · Replies 4 · Feb 12, 2005

Replies: 4

Views: 5K

Graduate Expansion Coeff. & Probability of E in Schrodinger Eq.

Feb 8, 2005 · Replies 6 · Feb 10, 2005

Replies: 6

Views: 4K

Graduate Question regarding Dirac matrices

Feb 10, 2005 · Replies 13 · Feb 10, 2005

Replies: 13

Views: 3K

Graduate The consequences of energy-time-uncertainty

Feb 3, 2005 · Replies 2 · Feb 10, 2005

Replies: 2

Views: 3K

Graduate Showing that the Virial Theorem holds

Feb 9, 2005 · Replies 4 · Feb 9, 2005

Replies: 4

Views: 3K

Graduate Prove P=h/i(d/dx) from Axioms: Get an Answer

Feb 9, 2005 · Replies 6 · Feb 9, 2005

Replies: 6

Views: 2K

Graduate Put a cat into a pure quantum state, without killing the cat?

Feb 7, 2005 · Replies 10 · Feb 9, 2005

Replies: 10

Views: 3K

Graduate Fractional Fourier Transform in a QM Oscillator

Feb 1, 2005 · Replies 2 · Feb 9, 2005

Replies: 2

Views: 3K

Graduate Could a Universe with h=0 be Fully Deterministic?

Feb 4, 2005 · Replies 20 · Feb 9, 2005

Replies: 20

Views: 5K

Graduate Do hydrogen atoms continuously emit radiation?

Feb 7, 2005 · Replies 22 · Feb 8, 2005

Replies: 22

Views: 9K

Graduate If photons had S=0, not 1, what changes?

Feb 7, 2005 · Replies 6 · Feb 8, 2005

Replies: 6

Views: 2K

Graduate EPR results equal the Fully Deterministic case

Feb 6, 2005 · Replies 10 · Feb 8, 2005

Replies: 10

Views: 3K

Graduate Cheap fun with polarized light

Feb 8, 2005 · Replies 4 · Feb 8, 2005

Replies: 4

Views: 3K

Graduate The Wave Equation IS the electron

Feb 7, 2005 · Replies 11 · Feb 8, 2005

Replies: 11

Views: 3K

Graduate Could matter and matter waves be derivable?

Feb 7, 2005 · Replies 2 · Feb 8, 2005

Replies: 2

Views: 3K

Graduate Learning Quantum Electrodynamics: Resources and Advice

Feb 6, 2005 · Replies 11 · Feb 8, 2005

Replies: 11

Views: 4K

Graduate Why can't quantum crypto be broken this way

Feb 7, 2005 · Replies 11 · Feb 8, 2005

Replies: 11

Views: 3K

Graduate Calculating Self Energy of Electrons: A Classical Approach

Feb 7, 2005 · Replies 2 · Feb 7, 2005

Replies: 2

Views: 3K

Graduate Quantum Physics and the Real World

Feb 6, 2005 · Replies 15 · Feb 7, 2005

Replies: 15

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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