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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

49 minutes ago

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How can a particle have infinite positions in quantum mechanics?

Feb 6, 2012 · Replies 29 · Feb 27, 2012

Replies: 29

Views: 5K

What are the states and equations of the Gluon Octet in SU(3)?

Feb 27, 2012 · Replies 1 · Feb 27, 2012

Replies: 1

Views: 2K

How to debunk new age Quantum physics crankery

Feb 25, 2012 · Replies 12 · Feb 27, 2012

Replies: 12

Views: 5K

Question on quantum entanglement mechanism

Feb 26, 2012 · Replies 3 · Feb 27, 2012

Replies: 3

Views: 3K

Some questions regarding decoherence

Feb 17, 2012 · Replies 14 · Feb 27, 2012

Replies: 14

Views: 3K

Heisenberg Uncertainty Principle

Feb 25, 2012 · Replies 9 · Feb 26, 2012

Replies: 9

Views: 3K

Energies of a particle in a box vs. free particle?

Feb 23, 2012 · Replies 5 · Feb 26, 2012

Replies: 5

Views: 3K

Orbital Angular Momentum Origin

Feb 25, 2012 · Replies 3 · Feb 26, 2012

Replies: 3

Views: 2K

Photon classical or nonclassical object?

Feb 25, 2012 · Replies 5 · Feb 26, 2012

Replies: 5

Views: 2K

Semiclassical descriptions of atom-light interaction

Feb 24, 2012 · Replies 3 · Feb 26, 2012

Replies: 3

Views: 2K

Is there empty space with null energy?

Feb 24, 2012 · Replies 2 · Feb 26, 2012

Replies: 2

Views: 2K

Rotational Quantum Number J: Understanding Its Role in Microwave Spectroscopy

Feb 26, 2012 · Replies 2 · Feb 26, 2012

Replies: 2

Views: 4K

Question (not homework): Quantum phenomena and the Macroscopic world

Feb 25, 2012 · Replies 3 · Feb 26, 2012

Replies: 3

Views: 2K

How is the length of a particle in a box polyene determined?

Feb 18, 2012 · Replies 5 · Feb 26, 2012

Replies: 5

Views: 3K

How fast do wave packets typically spread out?

Feb 25, 2012 · Replies 1 · Feb 25, 2012

Replies: 1

Views: 2K

Is there such a thing as an anti-gluon?

Feb 25, 2012 · Replies 5 · Feb 25, 2012

Replies: 5

Views: 4K

Quantum Tunneling and Deuterium Fusion

Dec 22, 2010 · Replies 19 · Feb 25, 2012

Replies: 19

Views: 7K

Purely electric quantum tunneling fusion

Jul 19, 2010 · Replies 2 · Feb 25, 2012

Replies: 2

Views: 3K

Can You Change Photon Polarization Without Affecting Entanglement?

Feb 23, 2012 · Replies 7 · Feb 25, 2012

Replies: 7

Views: 4K

Do Electrons Exhibit Electromagnetic Fields Like Photons?

Feb 25, 2012 · Replies 2 · Feb 25, 2012

Replies: 2

Views: 3K

Total nuclear spin of deuteron

Feb 24, 2012 · Replies 1 · Feb 25, 2012

Replies: 1

Views: 3K

How Do Operators and Integrals Connect in Quantum Mechanics?

Feb 24, 2012 · Replies 7 · Feb 25, 2012

Replies: 7

Views: 3K

Bell's Theorem and the detector

Feb 25, 2012 · Replies 4 · Feb 25, 2012

Replies: 4

Views: 2K

Helps on understanding different representation transformations

Feb 25, 2012 · Replies 1 · Feb 25, 2012

Replies: 1

Views: 1K

Renormalization Group for dummies

Feb 19, 2012 · Replies 47 · Feb 24, 2012

2

Replies: 47

Views: 16K

Entanglement/Nonlocality question

Feb 23, 2012 · Replies 6 · Feb 24, 2012

Replies: 6

Views: 2K

Why triplet state |1,0> is considered parallel ?

Feb 23, 2012 · Replies 2 · Feb 24, 2012

Replies: 2

Views: 3K

Uncertainty principle and particle accelerators

Feb 23, 2012 · Replies 6 · Feb 24, 2012

Replies: 6

Views: 3K

How Can a Beginner Start Learning Quantum Physics?

Feb 22, 2012 · Replies 4 · Feb 24, 2012

Replies: 4

Views: 2K

Unraveling the Mysteries of Quantum Entanglement: Implications and Applications

Feb 22, 2012 · Replies 9 · Feb 23, 2012

Replies: 9

Views: 3K

What is the definition of integration on operators?

Feb 16, 2012 · Replies 9 · Feb 23, 2012

Replies: 9

Views: 3K

Understanding the Scully and Yoon-Ho Experiment: Interference in D0

Feb 22, 2012 · Replies 9 · Feb 23, 2012

Replies: 9

Views: 3K

Can Entangled Photons Be Used for Instantaneous Morse Code Communication?

Feb 23, 2012 · Replies 2 · Feb 23, 2012

Replies: 2

Views: 3K

Understanding the Relationship Between Energy and Frequency

Feb 22, 2012 · Replies 2 · Feb 23, 2012

Replies: 2

Views: 3K

Does the Quantum Zeno Effect Contradict the Heisenberg Uncertainty Principle?

Feb 21, 2012 · Replies 9 · Feb 23, 2012

Replies: 9

Views: 3K

Why can't the wavefunction equal infinity?

Feb 22, 2012 · Replies 2 · Feb 23, 2012

Replies: 2

Views: 2K

Derivation of Fowler-Nordheim current density

Oct 20, 2004 · Replies 9 · Feb 22, 2012

Replies: 9

Views: 17K

Infinite Energy beneath Quantum Vacuum?

Feb 21, 2012 · Replies 6 · Feb 22, 2012

Replies: 6

Views: 5K

Understanding Force on an Atom in the Heisenberg Picture of Quantum Mechanics

Feb 22, 2012 · Replies 1 · Feb 22, 2012

Replies: 1

Views: 2K

Number of components of Dirac spinor in arbitrary dimensions.

Jul 10, 2008 · Replies 8 · Feb 22, 2012

Replies: 8

Views: 11K

Relationship between electron and quark charge

Feb 21, 2012 · Replies 7 · Feb 22, 2012

Replies: 7

Views: 4K

Wigner's Theorem/Antiunitary Transformation

Feb 21, 2012 · Replies 4 · Feb 22, 2012

Replies: 4

Views: 3K

C is infinity thus electrons can be in two places at once

Feb 21, 2012 · Replies 12 · Feb 22, 2012

Replies: 12

Views: 3K

Observables and Commutation (newbie questions?)

Feb 16, 2012 · Replies 37 · Feb 22, 2012

2

Replies: 37

Views: 7K

Why not diffeomorphism group representation theory?

Feb 6, 2012 · Replies 28 · Feb 22, 2012

Replies: 28

Views: 8K

Photon interaction during refraction

Feb 21, 2012 · Replies 3 · Feb 22, 2012

Replies: 3

Views: 3K

Gauge invariant Lagrangian: unique?

Feb 19, 2012 · Replies 2 · Feb 21, 2012

Replies: 2

Views: 3K

What is the Landau pole and how does it relate to the coupling constant in QED?

Feb 21, 2012 · Replies 3 · Feb 21, 2012

Replies: 3

Views: 4K

This question may not come in the bracket of quantum mechanics but

Feb 17, 2012 · Replies 5 · Feb 21, 2012

Replies: 5

Views: 2K

What is symmetry breaking in the Standard Model?

Feb 20, 2012 · Replies 5 · Feb 21, 2012

Replies: 5

Views: 3K

The Double Slit Experiment: The weirdness of quantam physics

Feb 21, 2012 · Replies 2 · Feb 21, 2012

Replies: 2

Views: 2K

Does the hup essentially represent the wall or curtain of the universe?

Feb 20, 2012 · Replies 7 · Feb 21, 2012

Replies: 7

Views: 3K

Is uncertainty inherent in QM?

Feb 18, 2012 · Replies 13 · Feb 21, 2012

Replies: 13

Views: 3K

Small=high mass at quantum level, but big=high mass at classical level. Why?

Feb 20, 2012 · Replies 7 · Feb 21, 2012

Replies: 7

Views: 3K

What actually happens when a photon strikes an atom?

Feb 21, 2012 · Replies 1 · Feb 21, 2012

Replies: 1

Views: 7K

How do we arrive at Q = -1 from T3 and Y?

Feb 19, 2012 · Replies 1 · Feb 21, 2012

Replies: 1

Views: 2K

1/f noise at zero frequency or dc

Feb 19, 2012 · Replies 2 · Feb 21, 2012

Replies: 2

Views: 2K

Demonstration of Dirac equation covariance

Feb 20, 2012 · Replies 2 · Feb 20, 2012

Replies: 2

Views: 3K

Ampere's law with quantum mechanics

Feb 20, 2012 · Replies 2 · Feb 20, 2012

Replies: 2

Views: 2K

Hong-Ou-Mandel Effect: Explaining the "-" Sign

Feb 15, 2012 · Replies 20 · Feb 20, 2012

Replies: 20

Views: 6K

Can Slater Determinant Explain the Difference Between Bosons and Fermions?

Feb 18, 2012 · Replies 6 · Feb 20, 2012

Replies: 6

Views: 3K

Do the wave equations need to be modified for obstacles?

Feb 18, 2012 · Replies 3 · Feb 20, 2012

Replies: 3

Views: 2K

Electromagnetic and strong force

Feb 19, 2012 · Replies 3 · Feb 20, 2012

Replies: 3

Views: 2K

Exploring Energy Levels and Electron Configurations in Atomic Models

Sep 22, 2011 · Replies 2 · Feb 20, 2012

Replies: 2

Views: 3K

Does the Quantum Observer Effect Imply Consciousness Influences Reality?

Feb 19, 2012 · Replies 2 · Feb 20, 2012

Replies: 2

Views: 4K

Do we really need physical/real waves to explain single particle interference?

Feb 16, 2012 · Replies 10 · Feb 19, 2012

Replies: 10

Views: 3K

Is photon emission possible without electrons changing energy levels?

Feb 6, 2012 · Replies 9 · Feb 19, 2012

Replies: 9

Views: 4K

Quantum Computing gate matricies

Feb 19, 2012 · Replies 2 · Feb 19, 2012

Replies: 2

Views: 2K

UN-entanglement? is that possible?

Feb 17, 2012 · Replies 2 · Feb 19, 2012

Replies: 2

Views: 2K

Dynamics in the heizenberg picture

Feb 17, 2012 · Replies 2 · Feb 19, 2012

Replies: 2

Views: 2K

What is the true significance of Quantum Information Theory?

Feb 17, 2012 · Replies 2 · Feb 19, 2012

Replies: 2

Views: 2K

Increase in amplitude of an electron wave

Feb 18, 2012 · Replies 5 · Feb 18, 2012

Replies: 5

Views: 3K

Why Isn't the Strong Nuclear Force Unified with Electroweak in GUT Models?

Feb 15, 2012 · Replies 9 · Feb 18, 2012

Replies: 9

Views: 5K

Do Virtual Particles Become Real Under the Weisenberg Uncertainty Principle?

Nov 18, 2010 · Replies 29 · Feb 18, 2012

Replies: 29

Views: 6K

Quantum field theory and the renormalization group

Feb 16, 2012 · Replies 3 · Feb 18, 2012

Replies: 3

Views: 2K

Thermionic emission at same temperature

Feb 18, 2012 · Replies 1 · Feb 18, 2012

Replies: 1

Views: 2K

Must the State |O,ready> Be Orthogonal to |O,reads up> and |O,reads down>?

Feb 18, 2012 · Replies 1 · Feb 18, 2012

Replies: 1

Views: 2K

Hydrogwn atom electron probability

Feb 17, 2012 · Replies 2 · Feb 17, 2012

Replies: 2

Views: 2K

My bra-ket calcs seem to be going wrong - help

Feb 17, 2012 · Replies 3 · Feb 17, 2012

Replies: 3

Views: 2K

Can Someone Please Explain Hermitian Conjugates To Me?

Feb 16, 2012 · Replies 9 · Feb 17, 2012

Replies: 9

Views: 3K

Unraveling the Mystery of Quantum Eraser - Help Needed!

Feb 17, 2012 · Replies 1 · Feb 17, 2012

Replies: 1

Views: 2K

What are the energy states of a hydrogen atom in a B field?

Feb 15, 2012 · Replies 1 · Feb 17, 2012

Replies: 1

Views: 2K

What are the differences between the two graphs of electron probability density?

Feb 17, 2012 · Replies 1 · Feb 17, 2012

Replies: 1

Views: 2K

Exchange splitting of energy levels of a system?

Feb 17, 2012 · Replies 1 · Feb 17, 2012

Replies: 1

Views: 2K

Where is the arrow of time if every decision is essentially instant?

Feb 16, 2012 · Replies 2 · Feb 17, 2012

Replies: 2

Views: 2K

Deriving Stationary State Wave Functions for a Free Particle on a Ring

Apr 9, 2011 · Replies 25 · Feb 17, 2012

Replies: 25

Views: 15K

QFT as pilot-wave theory of particle creation and destruction

Feb 15, 2012 · Replies 10 · Feb 17, 2012

Replies: 10

Views: 3K

Questions about the delayed choice quantum erasure experiment

Feb 16, 2012 · Replies 5 · Feb 17, 2012

Replies: 5

Views: 3K

Nonlocality and Compactified Dimensions

Feb 16, 2012 · Replies 1 · Feb 17, 2012

Replies: 1

Views: 2K

Ok, suppose Macro-entanglement is possible

Feb 15, 2012 · Replies 14 · Feb 17, 2012

Replies: 14

Views: 4K

The Mystery of Quantum Entanglement: Feynman's View on the Double Slit Pattern

Feb 16, 2012 · Replies 6 · Feb 17, 2012

Replies: 6

Views: 3K

On Thought Experiments: Question

Feb 16, 2012 · Replies 1 · Feb 16, 2012

Replies: 1

Views: 2K

Can Time Crystals Redefine Our Understanding of Time and Space?

Feb 16, 2012 · Replies 1 · Feb 16, 2012

Replies: 1

Views: 2K

Understanding spin, spinors, and rotations

Feb 14, 2012 · Replies 7 · Feb 16, 2012

Replies: 7

Views: 6K

Spherical harmonics and wavefunctions

Feb 14, 2012 · Replies 6 · Feb 16, 2012

Replies: 6

Views: 4K

Zeeman effect - spin orbit coupling

Feb 16, 2012 · Replies 4 · Feb 16, 2012

Replies: 4

Views: 5K

Quantum mechanics without wavefunctions

Feb 13, 2012 · Replies 13 · Feb 16, 2012

Replies: 13

Views: 5K

Ref for single electron double slit experiments

Feb 14, 2012 · Replies 3 · Feb 16, 2012

Replies: 3

Views: 2K

How does Perturbation theory account for interactions in QED?

Feb 14, 2012 · Replies 8 · Feb 16, 2012

Replies: 8

Views: 4K

Wave function collapse with Young's double slits.

Feb 15, 2012 · Replies 2 · Feb 15, 2012

Replies: 2

Views: 2K

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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