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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 Understanding Barandes' microscopic theory of causality

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Exploring the Paradoxical Einstein-Podolsky-Rosen Experiment

Mar 12, 2008 · Replies 97 · Mar 20, 2008

4

Replies: 97

Views: 18K

A solution to time dependent SE but not Time independent SE?

Mar 16, 2008 · Replies 5 · Mar 19, 2008

Replies: 5

Views: 4K

Quantum Computing: Are D-Wave's Adiabatic Quantum Computers Effective?

Mar 19, 2008 · Replies 3 · Mar 19, 2008

Replies: 3

Views: 3K

Is photon emission spherical or linear?

Mar 18, 2008 · Replies 3 · Mar 19, 2008

Replies: 3

Views: 5K

Really a virtual particle sea?

Mar 8, 2008 · Replies 19 · Mar 19, 2008

Replies: 19

Views: 5K

QM Intro: Questions on Copenhagen, Feynmann and Many Worlds

Mar 18, 2008 · Replies 8 · Mar 19, 2008

Replies: 8

Views: 3K

Understanding the Gamow Energy Equation

Mar 19, 2008 · Replies 2 · Mar 19, 2008

Replies: 2

Views: 11K

Proving Linear Theory: Key Points Needed

Mar 17, 2008 · Replies 2 · Mar 19, 2008

Replies: 2

Views: 2K

Spicy Questions on Particle Physics

Mar 17, 2008 · Replies 10 · Mar 19, 2008

Replies: 10

Views: 3K

Conceptual question about wavefunctions/momentum

Mar 17, 2008 · Replies 4 · Mar 19, 2008

Replies: 4

Views: 3K

Momentum to Energy Representation in 3D Box

Mar 18, 2008 · Replies 1 · Mar 18, 2008

Replies: 1

Views: 3K

Why are there two different values for the electron magnetic moment?

Mar 2, 2008 · Replies 9 · Mar 18, 2008

Replies: 9

Views: 8K

What exactly is a particle - in particular in constrast to a wave

Mar 17, 2008 · Replies 3 · Mar 18, 2008

Replies: 3

Views: 2K

When does Hawking radiation start?

Mar 14, 2008 · Replies 9 · Mar 18, 2008

Replies: 9

Views: 3K

Zeros of the partition function

Mar 17, 2008 · Replies 1 · Mar 18, 2008

Replies: 1

Views: 2K

Polarization, then detection: collapse when?

Mar 16, 2008 · Replies 8 · Mar 18, 2008

Replies: 8

Views: 3K

Does every observable commute with the hamiltonian?

Mar 16, 2008 · Replies 12 · Mar 17, 2008

Replies: 12

Views: 12K

How can you test if a bipartite system is entangled?

Mar 17, 2008 · Replies 2 · Mar 17, 2008

Replies: 2

Views: 4K

Question about the notation in Quantum Physics

Mar 17, 2008 · Replies 2 · Mar 17, 2008

Replies: 2

Views: 2K

Classical analouge of electron spin ?

Jan 28, 2008 · Replies 7 · Mar 17, 2008

Replies: 7

Views: 7K

Unitary Operators and the Time Evolution Operator: Exploring the Connection

Mar 14, 2008 · Replies 5 · Mar 17, 2008

Replies: 5

Views: 16K

Wave/particle duality: what exactly is a particle?

Mar 16, 2008 · Replies 26 · Mar 17, 2008

Replies: 26

Views: 7K

The Observer Effect: Testing Double-Slit Experiment?

Jan 14, 2008 · Replies 35 · Mar 17, 2008

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Replies: 35

Views: 16K

Path integrals and supposed sum over paths

Mar 11, 2008 · Replies 9 · Mar 17, 2008

Replies: 9

Views: 4K

Introduction to Quantum Field Theory in curved spacetime

Apr 18, 2007 · Replies 7 · Mar 17, 2008

Replies: 7

Views: 11K

How is the act of observation defined in quantum mechanics?

Mar 14, 2008 · Replies 4 · Mar 17, 2008

Replies: 4

Views: 3K

Dirac Delta Function Potential (One Dimension)

Mar 16, 2008 · Replies 4 · Mar 16, 2008

Replies: 4

Views: 9K

Do photons bounce off of each other?

Mar 16, 2008 · Replies 4 · Mar 16, 2008

Replies: 4

Views: 4K

A linear theory (quantum theory)?

Mar 16, 2008 · Replies 3 · Mar 16, 2008

Replies: 3

Views: 2K

Can Double Slit Quantum Eraser Enable Faster-than-Light Communication?

Mar 14, 2008 · Replies 11 · Mar 15, 2008

Replies: 11

Views: 5K

Is Richard Feynman's Lecture on Quantum Physics Still Relevant Today?

Mar 15, 2008 · Replies 1 · Mar 15, 2008

Replies: 1

Views: 2K

How can I accurately portray quantum physics in a short film?

Feb 10, 2008 · Replies 7 · Mar 14, 2008

Replies: 7

Views: 3K

Who Studies Partial Wave Unitarity in Quantum Mechanics?

Mar 14, 2008 · Replies 1 · Mar 14, 2008

Replies: 1

Views: 5K

Does the Pauli Exclusion Principle Apply to All Quantum Particles?

Feb 4, 2008 · Replies 2 · Mar 14, 2008

Replies: 2

Views: 5K

Photon's age? consider two interacting photons in the EPR effect

Mar 13, 2008 · Replies 16 · Mar 13, 2008

Replies: 16

Views: 5K

Oberver Collapsing Wave funcions vs. Wheeler-Feynman Absorber

Mar 13, 2008 · Replies 3 · Mar 13, 2008

Replies: 3

Views: 4K

Learn about Operator Transformation for Improved Understanding of Complex Papers

Mar 12, 2008 · Replies 3 · Mar 13, 2008

Replies: 3

Views: 4K

Can High Energy Levels Allow Neutrons to Overlap in Black Holes?

Mar 12, 2008 · Replies 1 · Mar 12, 2008

Replies: 1

Views: 3K

Two questions concerning scattering in QED

Mar 12, 2008 · Replies 2 · Mar 12, 2008

Replies: 2

Views: 2K

What Determines the Precession Angle of an Electron in a Magnetic Field?

Mar 11, 2008 · Replies 1 · Mar 11, 2008

Replies: 1

Views: 3K

Time Operator in Standard Quantum Mechanics?

Mar 10, 2008 · Replies 9 · Mar 11, 2008

Replies: 9

Views: 7K

Understanding the Uncertainty Principle

Mar 3, 2008 · Replies 62 · Mar 11, 2008

3

Replies: 62

Views: 10K

Infinite quantum wave function

Mar 7, 2008 · Replies 8 · Mar 10, 2008

Replies: 8

Views: 4K

Does Quantum Entanglement Reveal Flaws in Quantum Mechanics?

Jun 21, 2007 · Replies 25 · Mar 10, 2008

Replies: 25

Views: 8K

Virtual particle energy-momentum

Mar 10, 2008 · Replies 1 · Mar 10, 2008

Replies: 1

Views: 3K

Quantum mechanics and the macroscopic universe .

Feb 27, 2008 · Replies 43 · Mar 9, 2008

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Replies: 43

Views: 10K

Superselection Rule: Definition & Meaning

Nov 7, 2006 · Replies 15 · Mar 8, 2008

Replies: 15

Views: 6K

Transformations of free fields

Mar 6, 2008 · Replies 3 · Mar 8, 2008

Replies: 3

Views: 2K

Rotation Invariant of Sch. Equation and [Lx,H]=0] ?

Mar 5, 2008 · Replies 1 · Mar 8, 2008

Replies: 1

Views: 3K

How Do Quantum Operators Affect Position and Momentum Expectations?

Mar 7, 2008 · Replies 2 · Mar 8, 2008

Replies: 2

Views: 3K

Connection between Quantum and Classical worlds

Mar 8, 2008 · Replies 1 · Mar 8, 2008

Replies: 1

Views: 2K

How Is CP-Violation Explored in Particle Physics?

Mar 8, 2008 · Replies 2 · Mar 8, 2008

Replies: 2

Views: 2K

Relation between a measurement and the operators

Mar 7, 2008 · Replies 1 · Mar 7, 2008

Replies: 1

Views: 2K

Local measurements on an entangled pair. (My understanding)

Mar 7, 2008 · Replies 1 · Mar 7, 2008

Replies: 1

Views: 2K

Feynman propagator as distribution

Feb 25, 2008 · Replies 11 · Mar 7, 2008

Replies: 11

Views: 11K

Non-Physicist looking for an answer

Mar 5, 2008 · Replies 16 · Mar 7, 2008

Replies: 16

Views: 3K

A question about the uncertainty principle.

Mar 3, 2008 · Replies 21 · Mar 6, 2008

Replies: 21

Views: 5K

Two body problem of Hidrogen Atom

Mar 6, 2008 · Replies 1 · Mar 6, 2008

Replies: 1

Views: 2K

Angular Momentum, Spin and SO(3), SU(2), and Lorentz Group

Mar 5, 2008 · Replies 2 · Mar 6, 2008

Replies: 2

Views: 3K

Physicists Successfully Store and Retrieve Nothing

Mar 3, 2008 · Replies 3 · Mar 4, 2008

Replies: 3

Views: 3K

Are the Quantum Numbers real ?

Mar 3, 2008 · Replies 8 · Mar 4, 2008

Replies: 8

Views: 3K

A common sense objection to tunneling?

Mar 3, 2008 · Replies 10 · Mar 4, 2008

Replies: 10

Views: 3K

The Meaning of Schrodingers Equation - In English

Mar 1, 2008 · Replies 10 · Mar 3, 2008

Replies: 10

Views: 5K

Understanding Classical Physics: The Role of Planck Constant

Feb 28, 2008 · Replies 2 · Mar 3, 2008

Replies: 2

Views: 7K

Quantum computations, irreversibility, unitarity

Mar 3, 2008 · Replies 2 · Mar 3, 2008

Replies: 2

Views: 3K

Foldy-Wouthusien velocity operator

Mar 2, 2008 · Replies 5 · Mar 3, 2008

Replies: 5

Views: 3K

Why doesn't the hydrogen spectrum show binding energies of 4.53 or 2.26 evolts?

Mar 1, 2008 · Replies 2 · Mar 3, 2008

Replies: 2

Views: 6K

Heisenberg's equation of motion

Mar 1, 2008 · Replies 5 · Mar 2, 2008

Replies: 5

Views: 9K

Berry's phase of bloch oscillation

Mar 1, 2008 · Replies 1 · Mar 2, 2008

Replies: 1

Views: 3K

What Conditions Ensure Adiabaticity in a Slowly Varying Harmonic Oscillator?

Mar 1, 2008 · Replies 1 · Mar 2, 2008

Replies: 1

Views: 3K

Spin of the sress-energy tensor in d=2

Mar 1, 2008 · Replies 1 · Mar 1, 2008

Replies: 1

Views: 2K

Understanding Photon Emission: Random Time Delay and Duration Explained

Feb 29, 2008 · Replies 3 · Mar 1, 2008

Replies: 3

Views: 3K

Quantum Nonsense? Film Review on Liquid Nitrogen & Superconductor

Feb 23, 2008 · Replies 23 · Feb 29, 2008

Replies: 23

Views: 7K

Charge In Schroedinger's Equation

Feb 28, 2008 · Replies 7 · Feb 29, 2008

Replies: 7

Views: 3K

What is the result of Fourier transformation of functional theta function?

Feb 29, 2008 · Replies 3 · Feb 29, 2008

Replies: 3

Views: 3K

Getting Involved In High School?

Feb 28, 2008 · Replies 1 · Feb 28, 2008

Replies: 1

Views: 2K

Minimum possible energy for a particle in a box

Feb 27, 2008 · Replies 1 · Feb 28, 2008

Replies: 1

Views: 4K

Momentum as the generator of translation

Feb 14, 2008 · Replies 8 · Feb 28, 2008

Replies: 8

Views: 13K

What is the Uncertainty Principle in Quantum Physics?

Feb 27, 2008 · Replies 8 · Feb 28, 2008

Replies: 8

Views: 3K

Information RE The Double-Slit Experiment?

Feb 26, 2008 · Replies 13 · Feb 27, 2008

Replies: 13

Views: 3K

Have you heard about QED coherence in matter?

Feb 25, 2008 · Replies 1 · Feb 27, 2008

Replies: 1

Views: 5K

What's the difference between them

Feb 27, 2008 · Replies 5 · Feb 27, 2008

Replies: 5

Views: 2K

The idea behind renormalization group.

Feb 18, 2008 · Replies 3 · Feb 27, 2008

Replies: 3

Views: 4K

What happed to the other, if one entangled particle is destroyed

Feb 25, 2008 · Replies 5 · Feb 27, 2008

Replies: 5

Views: 4K

Do waves and/or particles exist at all?

Feb 23, 2008 · Replies 8 · Feb 26, 2008

Replies: 8

Views: 7K

Are Waves Real or Just Mathematical Constructs in Quantum Physics?

Feb 25, 2008 · Replies 18 · Feb 26, 2008

Replies: 18

Views: 3K

How can the Cauchy integral and Fourier integral produce the same result?

Mar 17, 2007 · Replies 317 · Feb 26, 2008

11

Replies: 317

Views: 82K

One-particle irreducibles in P&S

Feb 24, 2008 · Replies 2 · Feb 26, 2008

Replies: 2

Views: 3K

Converting cm^-1 for Fine-Structure Energy Difference

Feb 25, 2008 · Replies 2 · Feb 25, 2008

Replies: 2

Views: 2K

Maxwell's equations, Orthogonality, electric and magnetic fields in EM

Feb 17, 2008 · Replies 27 · Feb 24, 2008

Replies: 27

Views: 8K

How Large Can a Nucleus Get Before Instability Sets In?

Feb 20, 2008 · Replies 6 · Feb 24, 2008

Replies: 6

Views: 9K

Wave-Particle Duality: HotQuanta's Insight

Feb 24, 2008 · Replies 3 · Feb 24, 2008

Replies: 3

Views: 3K

Ansatz: Principle, Hypothesis, Boundary Condition?

Feb 24, 2008 · Replies 1 · Feb 24, 2008

Replies: 1

Views: 5K

Can virtual particles appear ANYWHERE?

Feb 18, 2008 · Replies 23 · Feb 24, 2008

Replies: 23

Views: 6K

When do we use notion of effective mass

Feb 24, 2008 · Replies 1 · Feb 24, 2008

Replies: 1

Views: 3K

Noncommuting operators and uncertainty relations

Sep 24, 2007 · Replies 3 · Feb 24, 2008

Replies: 3

Views: 3K

Appropriate Concepts in the Formulation of Quantum Mechanics

Feb 12, 2008 · Replies 30 · Feb 23, 2008

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Replies: 30

Views: 7K

Electron Survival Theory at 0K: Explained

Feb 22, 2008 · Replies 11 · Feb 22, 2008

Replies: 11

Views: 3K

Question about the hermiticity of the momentum operator

Feb 22, 2008 · Replies 4 · Feb 22, 2008

Replies: 4

Views: 4K

Visualisation of H2 molecule wavefuctions needed

Feb 8, 2008 · Replies 45 · Feb 22, 2008

2

Replies: 45

Views: 7K

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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