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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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Quantum Mechanics and General Relativity

Nov 11, 2011 · Replies 2 · Nov 14, 2011

Replies: 2

Views: 3K

Wave Function Collapse: Atom's Non-Stable State

Nov 12, 2011 · Replies 2 · Nov 14, 2011

Replies: 2

Views: 2K

Does the Principal Quantum Number Refer to the Electron Shell?

Nov 13, 2011 · Replies 2 · Nov 13, 2011

Replies: 2

Views: 2K

Experimental confirmation of indistinguishability of identical particles?

Nov 11, 2011 · Replies 4 · Nov 13, 2011

Replies: 4

Views: 2K

Fermion-Boson Question: Why Different Positions?

Nov 10, 2011 · Replies 4 · Nov 12, 2011

Replies: 4

Views: 3K

Amplitude - photon correspondence

Nov 12, 2011 · Replies 1 · Nov 12, 2011

Replies: 1

Views: 2K

On spinor representations and SL(2,C)

Nov 12, 2011 · Replies 9 · Nov 12, 2011

Replies: 9

Views: 6K

What should we use to express free particle in Quantum Mechanics?

Oct 21, 2011 · Replies 13 · Nov 12, 2011

Replies: 13

Views: 4K

Understanding De Broeglie Wavelength & Electron Orbits

Nov 11, 2011 · Replies 3 · Nov 12, 2011

Replies: 3

Views: 2K

Grilling the Double Slit Experiment

Oct 27, 2011 · Replies 17 · Nov 11, 2011

Replies: 17

Views: 4K

Is quantum physics a growing field in the future?

Nov 8, 2011 · Replies 2 · Nov 11, 2011

Replies: 2

Views: 3K

Hawking Radiation's Virtual Particles?

Nov 10, 2011 · Replies 4 · Nov 11, 2011

Replies: 4

Views: 3K

Why saying Quantum Mechanics is pillar of QFT?

Nov 10, 2011 · Replies 4 · Nov 11, 2011

Replies: 4

Views: 2K

Relativistic correction to quantum mechanical system

Nov 8, 2011 · Replies 2 · Nov 11, 2011

Replies: 2

Views: 3K

Hamiltonian describing energy transfer to bloch Electron from EM field

Nov 11, 2011 · Replies 1 · Nov 11, 2011

Replies: 1

Views: 2K

Understanding Spin and Magnetic Field in Electrons: Explained

Nov 9, 2011 · Replies 8 · Nov 11, 2011

Replies: 8

Views: 4K

Landau quantization of cyclotron orbit

Nov 10, 2011 · Replies 2 · Nov 11, 2011

Replies: 2

Views: 3K

Can you make a definition of velocity in QM ?

Nov 4, 2011 · Replies 17 · Nov 10, 2011

Replies: 17

Views: 4K

2 Q's on Quantum Stat Mech: why only eigenvalues, why dE

Nov 4, 2011 · Replies 12 · Nov 10, 2011

Replies: 12

Views: 3K

Uncertainty principle, virtual particle pairs and energy

Nov 10, 2011 · Replies 3 · Nov 10, 2011

Replies: 3

Views: 4K

Question about Quantum Computers

Nov 9, 2011 · Replies 1 · Nov 10, 2011

Replies: 1

Views: 2K

Who First Plotted the Spectral Radiancy Curve and When?

Nov 10, 2011 · Replies 1 · Nov 10, 2011

Replies: 1

Views: 3K

Probability waves - instant infinite extent?

Nov 9, 2011 · Replies 3 · Nov 10, 2011

Replies: 3

Views: 2K

Eigenvaules and quantum numbers

Nov 7, 2011 · Replies 8 · Nov 9, 2011

Replies: 8

Views: 3K

Light polarization vs photons spin

Nov 5, 2011 · Replies 20 · Nov 9, 2011

Replies: 20

Views: 9K

SU(N) symmetry in harmonic oscillator

Nov 9, 2011 · Replies 3 · Nov 9, 2011

Replies: 3

Views: 5K

Question related to quantization of the magnetic field

Nov 2, 2011 · Replies 1 · Nov 9, 2011

Replies: 1

Views: 2K

I need just ONE analytic solution to the time-dependent Schrodinger Equation.

Nov 8, 2011 · Replies 1 · Nov 8, 2011

Replies: 1

Views: 2K

Why should Hawking radiation decrease a black hole's size?

Nov 8, 2011 · Replies 2 · Nov 8, 2011

Replies: 2

Views: 2K

Quantum efficiency as a function of wavelength

Mar 19, 2010 · Replies 1 · Nov 8, 2011

Replies: 1

Views: 3K

Schrödinger's cat contradiction

Nov 6, 2011 · Replies 18 · Nov 8, 2011

Replies: 18

Views: 5K

How to Normalize and Integrate a Wave Function in the Range 0 to L?

Nov 6, 2011 · Replies 4 · Nov 8, 2011

Replies: 4

Views: 5K

Chrial gauge theories and anomalies(Srednicki ch75-76)

Oct 25, 2011 · Replies 6 · Nov 8, 2011

Replies: 6

Views: 3K

Box normalization of plane wave

Oct 13, 2011 · Replies 12 · Nov 8, 2011

Replies: 12

Views: 11K

Question about measurement and unitary dynamics

Nov 8, 2011 · Replies 1 · Nov 8, 2011

Replies: 1

Views: 2K

Virtual particles colliding with other virtual particles

Nov 7, 2011 · Replies 7 · Nov 8, 2011

Replies: 7

Views: 5K

What is the Principle of Cluster Decomposition in Quantum Field Theory?

Nov 5, 2011 · Replies 5 · Nov 8, 2011

Replies: 5

Views: 9K

Confused by Feynman sum over histories

Nov 6, 2011 · Replies 5 · Nov 8, 2011

Replies: 5

Views: 4K

Does Ward Identity in QCD has origin of U(1) or SU(3) symmetry?

Nov 7, 2011 · Replies 1 · Nov 8, 2011

Replies: 1

Views: 3K

Electron energy shells-where do they come from

Nov 7, 2011 · Replies 2 · Nov 7, 2011

Replies: 2

Views: 3K

Commutation of Hamiltonian and time evolution operator

Nov 6, 2011 · Replies 6 · Nov 7, 2011

Replies: 6

Views: 9K

Do particles have spatial extent or are they point-like?

Oct 30, 2011 · Replies 18 · Nov 7, 2011

Replies: 18

Views: 6K

Normalization of a wavefunction

Oct 30, 2011 · Replies 4 · Nov 7, 2011

Replies: 4

Views: 3K

Is Quantum Physics Non-Locality According to Einstein, Podolski, and Rosen?

Nov 6, 2011 · Replies 4 · Nov 6, 2011

Replies: 4

Views: 2K

Bohm's Hidden Variable Model: Distinguishing from Einstein's Vision

Nov 6, 2011 · Replies 3 · Nov 6, 2011

Replies: 3

Views: 3K

Is there evidence for a local hidden variable model in quantum physics?

Nov 6, 2011 · Replies 1 · Nov 6, 2011

Replies: 1

Views: 2K

I know that renormalisation has to do with getting rid of unwanted

Nov 5, 2011 · Replies 8 · Nov 6, 2011

Replies: 8

Views: 3K

Relaxation Rate for Single Qubit Decoherence Time

Nov 5, 2011 · Replies 1 · Nov 6, 2011

Replies: 1

Views: 2K

Difference and benefits of qubits compared to regular bits?

Nov 4, 2011 · Replies 3 · Nov 5, 2011

Replies: 3

Views: 5K

Trying to understand Heisenberg Uncertainty Principle in a physical sense

Sep 29, 2011 · Replies 49 · Nov 5, 2011

2

Replies: 49

Views: 10K

Choas and the bridge from Classical to Quantum physics

Nov 5, 2011 · Replies 2 · Nov 5, 2011

Replies: 2

Views: 2K

Can someone explain what a propagator is and does?

Nov 4, 2011 · Replies 2 · Nov 5, 2011

Replies: 2

Views: 2K

How do you visualize the spin of electron in your head?

Aug 14, 2010 · Replies 14 · Nov 5, 2011

Replies: 14

Views: 6K

Quantum Mechanics: What is Quanta?

Nov 5, 2011 · Replies 2 · Nov 5, 2011

Replies: 2

Views: 3K

Why is there a forbidden energy gap in solid state electronics?

Nov 5, 2011 · Replies 6 · Nov 5, 2011

Replies: 6

Views: 3K

2nd order perturbation calculation for a system involving spins

Nov 5, 2011 · Replies 1 · Nov 5, 2011

Replies: 1

Views: 2K

Why is it path integral formalism being a ''quantization'' procedure?

Nov 3, 2011 · Replies 6 · Nov 5, 2011

Replies: 6

Views: 3K

Virtual Photons over Large Distances

Nov 2, 2011 · Replies 7 · Nov 4, 2011

Replies: 7

Views: 3K

Understanding Interference Between Spin States

Nov 4, 2011 · Replies 3 · Nov 4, 2011

Replies: 3

Views: 2K

Is there a limit to information storage on the surface of a black hole?

Nov 3, 2011 · Replies 4 · Nov 4, 2011

Replies: 4

Views: 3K

Loophole-free quantum steering

Nov 4, 2011 · Replies 4 · Nov 4, 2011

Replies: 4

Views: 3K

Communication via Quantum Entanglement

Nov 4, 2011 · Replies 1 · Nov 4, 2011

Replies: 1

Views: 3K

The science behind the conversion of particles to other particles

Nov 2, 2011 · Replies 8 · Nov 4, 2011

Replies: 8

Views: 3K

Observer independent collapses?

Nov 1, 2011 · Replies 18 · Nov 3, 2011

Replies: 18

Views: 3K

Is Feynman's QFT Unitarity Issue Resolved?

Nov 3, 2011 · Replies 1 · Nov 3, 2011

Replies: 1

Views: 2K

Bohr Model and wave-particle duality

Nov 3, 2011 · Replies 1 · Nov 3, 2011

Replies: 1

Views: 3K

Explaining Electromagnetic Fields: Mass and Distance

Nov 1, 2011 · Replies 2 · Nov 3, 2011

Replies: 2

Views: 2K

Quantum Information and Brain neurons

Oct 27, 2011 · Replies 10 · Nov 3, 2011

Replies: 10

Views: 4K

Unitary Transformation: Proving ¯UU = 1 in Dirac's Text

Nov 2, 2011 · Replies 5 · Nov 3, 2011

Replies: 5

Views: 3K

Question About Bohr's Quantified Shell Model

Nov 2, 2011 · Replies 3 · Nov 2, 2011

Replies: 3

Views: 3K

Matrix elements of the secular determinant for trial functions?

Nov 2, 2011 · Replies 1 · Nov 2, 2011

Replies: 1

Views: 2K

Is the Expectation Value of Momentum for a Superposition of Sine Functions Zero?

Nov 2, 2011 · Replies 4 · Nov 2, 2011

Replies: 4

Views: 3K

Energy time uncertainty principle

Nov 1, 2011 · Replies 9 · Nov 2, 2011

Replies: 9

Views: 4K

Do the eigenfunctions for the position operator form an orthogonal set?

Nov 1, 2011 · Replies 3 · Nov 2, 2011

Replies: 3

Views: 3K

What Are the Consequences of Breaking U(1) in Electroweak Theory?

Oct 21, 2011 · Replies 12 · Nov 2, 2011

Replies: 12

Views: 3K

I must be discomprehending the Rutherford scattering cross section.

Nov 1, 2011 · Replies 6 · Nov 2, 2011

Replies: 6

Views: 3K

Did John Wheeler Really Believe Consciousness Causes Collapse?

Nov 1, 2011 · Replies 1 · Nov 1, 2011

Replies: 1

Views: 3K

Quantum computers and modelling a quantum computer on a classical computer

Oct 30, 2011 · Replies 13 · Nov 1, 2011

Replies: 13

Views: 5K

How do electrons become excited in an atom

Nov 1, 2011 · Replies 2 · Nov 1, 2011

Replies: 2

Views: 6K

Lack of quantum effects at higher temperatures

Nov 1, 2011 · Replies 1 · Nov 1, 2011

Replies: 1

Views: 2K

What if a particle had infinite mass?

Nov 1, 2011 · Replies 2 · Nov 1, 2011

Replies: 2

Views: 3K

A thought on Quantum mechanics

Nov 1, 2011 · Replies 3 · Nov 1, 2011

Replies: 3

Views: 2K

Ward-Takahashi identities from symmetry

Nov 1, 2011 · Replies 1 · Nov 1, 2011

Replies: 1

Views: 2K

Why Do Square Holes in Bamboo Slats Create Round Light Patterns?

Nov 1, 2011 · Replies 4 · Nov 1, 2011

Replies: 4

Views: 2K

Symmetric and Antisymmetric WF

Nov 1, 2011 · Replies 1 · Nov 1, 2011

Replies: 1

Views: 3K

A question for Sakurai's advanced qm

Oct 30, 2011 · Replies 7 · Nov 1, 2011

Replies: 7

Views: 3K

MSbar Renormalisation + Gamma Functions

Oct 28, 2011 · Replies 2 · Nov 1, 2011

Replies: 2

Views: 2K

Schroedinger equation and random walks

Oct 31, 2011 · Replies 5 · Nov 1, 2011

Replies: 5

Views: 4K

Understand Grover's Algorithm: Classical Problem vs Quantum Solution

Oct 24, 2011 · Replies 7 · Oct 31, 2011

Replies: 7

Views: 4K

Large Scale Uncertainty Principle

Sep 15, 2011 · Replies 3 · Oct 31, 2011

Replies: 3

Views: 3K

The physical meaning of a phase factor

Oct 31, 2011 · Replies 7 · Oct 31, 2011

Replies: 7

Views: 19K

Quantum systems without a classical limit

Oct 28, 2011 · Replies 3 · Oct 31, 2011

Replies: 3

Views: 2K

Deutsch's algorithm vs classical algorithm

Oct 31, 2011 · Replies 1 · Oct 31, 2011

Replies: 1

Views: 3K

Are all eigenstates of observables orthogonal?

Oct 31, 2011 · Replies 1 · Oct 31, 2011

Replies: 1

Views: 2K

Photoelectric effect minimum frequency

Oct 31, 2011 · Replies 2 · Oct 31, 2011

Replies: 2

Views: 3K

Non-invariance under 2-Pi rotations?

Oct 28, 2011 · Replies 4 · Oct 31, 2011

Replies: 4

Views: 5K

Newbie Schrodinger equation question

Oct 30, 2011 · Replies 3 · Oct 31, 2011

Replies: 3

Views: 2K

Does Quantum Mechanics Challenge the Conservation of Matter Law?

Oct 30, 2011 · Replies 1 · Oct 31, 2011

Replies: 1

Views: 2K

Is it Information or Interaction that Observes ?

Oct 29, 2011 · Replies 9 · Oct 31, 2011

Replies: 9

Views: 3K

What does it mean if something Transforms Covariantly ? (Quantum Field Theory)

Oct 31, 2011 · Replies 1 · Oct 31, 2011

Replies: 1

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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