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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.

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Quantum Interpretations and Foundations

Particle vs Wave Interpretations of QM

1.3K threadsToday, 10:22 AM

Undergrad Particle vs Wave Interpretations of QM

Today, 10:22 AM

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Graduate How Do Qubits and Multiple Qubit Systems Enhance Computing Power?

Erwin
May 31, 2015 · Replies 4 · Jun 1, 2015

Replies: 4

Graduate Under what conditions is a photon a particle?

jimmylegss
May 31, 2015 · Replies 1 · May 31, 2015

Replies: 1

Graduate Can Virtual Particles Be Observed in Experiments?

alex7773
May 31, 2015 · Replies 2 · May 31, 2015

Replies: 2

Graduate Where is the flaw with predetermined entanglement state?

LsT
May 1, 2015 · Replies 98 · May 31, 2015

4

Replies: 98

Graduate How to calculate density matrix for the GHZ state

Agrippa
May 19, 2015 · Replies 6 · May 31, 2015

Replies: 6

Graduate Understanding Reflection Planes in Diatomic Molecules

moriheru
May 30, 2015 · Replies 1 · May 30, 2015

Replies: 1

Undergrad Why Does Light Exhibit Both Particle and Wave Properties?

Swetha.M.L
May 4, 2015 · Replies 40 · May 30, 2015

2

Replies: 40

Graduate What do we mean by Classical Simulation of Quantum Algorithm

JK423
May 24, 2015 · Replies 2 · May 30, 2015

Replies: 2

High School What is the difference between simple harmonic wave and stationary wave?

akashpandey
May 29, 2015 · Replies 5 · May 30, 2015

Replies: 5

Graduate Time-Dependent Perturbation Theory & Completeness

Runei
May 29, 2015 · Replies 2 · May 29, 2015

Replies: 2

Graduate Question regarding the double slit experiment

drawkcab
May 29, 2015 · Replies 7 · May 29, 2015

Replies: 7

Graduate Ballistic conduction and Superconductivity

NewtonApple
May 28, 2015 · Replies 4 · May 29, 2015

Replies: 4

Graduate Is another definition of sum useful?

jk22
May 8, 2015 · Replies 3 · May 29, 2015

Replies: 3

Graduate Measurement of a Hydrogen qubit?

Julian Blair
May 27, 2015 · Replies 3 · May 28, 2015

Replies: 3

Graduate Green's Functions and Feynman Diagrams

rolotomassi
May 28, 2015 · Replies 3 · May 28, 2015

Replies: 3

Graduate Spin 1/2 - Is √3/2ħ or √¾ħ Correct?

Isaac0427
May 28, 2015 · Replies 2 · May 28, 2015

Replies: 2

Graduate What is the point to study Anti-bunching?

Lizzie Mann
May 28, 2015 · Replies 1 · May 28, 2015

Replies: 1

Graduate Comparing the Uncertainty Principle: Griffiths vs. Shankar

Zerkor
May 26, 2015 · Replies 6 · May 28, 2015

Replies: 6

Graduate Superposition & Mixture : Preparation and Representation of

Swamp Thing
May 28, 2015 · Replies 3 · May 28, 2015

Replies: 3

Graduate Unpacking the Physics Behind the Annihilator-Creator Operator Formula

Lizzie Mann
May 26, 2015 · Replies 2 · May 28, 2015

Replies: 2

Graduate Scattering amplitude, link between quantum mechanics and QFT

Kurret
May 26, 2015 · Replies 1 · May 28, 2015

Replies: 1

Graduate Ammonia molecule geometry and radiation

forcefield
May 27, 2015 · Replies 5 · May 28, 2015

Replies: 5

Graduate Observer Big Bang? How come electrons have a wave nowadays?

slitted
May 26, 2015 · Replies 7 · May 28, 2015

Replies: 7

Graduate Transmission: Finite Potential Barriers & Potential Steps

Cluemore
May 26, 2015 · Replies 4 · May 28, 2015

Replies: 4

Graduate Single photon double slit, reset detector after each impact

UfoOvni
May 26, 2015 · Replies 35 · May 27, 2015

2

Replies: 35

Graduate Has anyone ever done this experiment before? quantum entanglement

billllib
May 26, 2015 · Replies 11 · May 27, 2015

Replies: 11

Graduate Hiding the observer with gravitational measurements?

slitted
May 26, 2015 · Replies 6 · May 27, 2015

Replies: 6

Graduate What Algorithms Extract Information from Quantum Eigenvalues?

ephen wilb
May 21, 2015 · Replies 15 · May 27, 2015

Replies: 15

Graduate Dispersion relation for non-relativistic quantum particles

dilloncyh
May 26, 2015 · Replies 1 · May 26, 2015

Replies: 1

Graduate Hanbury Brown and Twiss effect question

LmdL
Aug 28, 2014 · Replies 54 · May 26, 2015

2

Replies: 54

Graduate Are discrete particles and fields both present in Quantum Mechanics?

Pjpic
May 26, 2015 · Replies 1 · May 26, 2015

Replies: 1

Graduate More evidence that the wavefunction is ontologically real?

Quantumental
Feb 3, 2015 · Replies 71 · May 26, 2015

3

Replies: 71

Graduate Can we model classical world using quantum laws?

zonde
May 24, 2015 · Replies 9 · May 25, 2015

Replies: 9

Graduate Delayed Choice Quantum Eraser & The Observer (2000)

Megatherion
Apr 21, 2015 · Replies 44 · May 25, 2015

2

Replies: 44

Insights Why Renormalisation Needs a Cutoff - Comments

bhobba
May 24, 2015 · Replies 29 · May 25, 2015

Replies: 29

Graduate Give mass to a massless scalar field in 1+1, Higgs like?

Spinnor
May 24, 2015 · Replies 2 · May 25, 2015

Replies: 2

Graduate Good Books on Quantum Computing and Quantum Mechanics

fmpak93
May 25, 2015 · Replies 1 · May 25, 2015

Replies: 1

Graduate Are we wrong to try and unify quantum mechanics and relativity?

gerbilmore
Jan 17, 2015 · Replies 118 · May 25, 2015

4

Replies: 118

Graduate Performing integration over field variable

aaaa202
May 19, 2015 · Replies 1 · May 25, 2015

Replies: 1

Graduate Do Virtual Particles Cause The Wave Function To Collapse?

Ryan-Duddy
May 24, 2015 · Replies 2 · May 24, 2015

Replies: 2

Graduate Cohen-Tannoudji on mutually exclusive (?) events

terra
May 24, 2015 · Replies 2 · May 24, 2015

Replies: 2

Graduate Why Are Swap Gates Used in Quantum Fourier Transform Circuits?

jimmycricket
Apr 30, 2015 · Replies 4 · May 24, 2015

Replies: 4

Graduate Why Quantum Mechanics is Complex

Zerkor
Apr 24, 2015 · Replies 10 · May 24, 2015

Replies: 10

Graduate About role of Planck constant in classical physics

KFC
May 23, 2015 · Replies 7 · May 24, 2015

Replies: 7

Graduate Role of Angular Momentum in Defining Vector Operator ##\mathbf{V}##

blue_leaf77
May 24, 2015 · Replies 3 · May 24, 2015

Replies: 3

Graduate Completeness for a single particle

jk22
May 23, 2015 · Replies 3 · May 24, 2015

Replies: 3

Graduate In-principle existence of which-way info

Swamp Thing
May 23, 2015 · Replies 10 · May 24, 2015

Replies: 10

Graduate How do electrons change states on their own?

ephen wilb
May 24, 2015 · Replies 1 · May 24, 2015

Replies: 1

Graduate Different classical limits of quantum mechanics

spaghetti3451
May 20, 2015 · Replies 8 · May 23, 2015

Replies: 8

Graduate Is it Valid to Treat a Solid as a Large Molecule in Calculating Specific Heat?

A_s_a_d
May 23, 2015 · Replies 2 · May 23, 2015

Replies: 2

Graduate Why do collapse functions change form in master equations?

Agrippa
May 17, 2015 · Replies 1 · May 23, 2015

Replies: 1

Graduate Potential energy term in Schrodinger's equation?

iScience
May 14, 2015 · Replies 2 · May 23, 2015

Replies: 2

Graduate Origin of Charge: Electrons, Protons & Photons

driftwood
May 15, 2015 · Replies 17 · May 22, 2015

Replies: 17

Graduate Suggested topics for a beginner in QP? What got you hooked?

DastardlyBliss
May 22, 2015 · Replies 6 · May 22, 2015

Replies: 6

Graduate Mathematical conundrum when adding complex exponentials

Runei
May 22, 2015 · Replies 3 · May 22, 2015

Replies: 3

Graduate What Are Incomplete Collapses and Tails in Objective Collapse Theories?

ephen wilb
May 13, 2015 · Replies 25 · May 22, 2015

Replies: 25

Graduate Confused about the Pauli Exclusion Principle....

Lance Fernandes
May 22, 2015 · Replies 1 · May 22, 2015

Replies: 1

Graduate Measuring Qubits: Basics for Quantum Computing Beginners

Ananthan9470
May 20, 2015 · Replies 5 · May 22, 2015

Replies: 5

Undergrad What is the difference between a vector and a vector space?

MNskating
May 21, 2015 · Replies 4 · May 21, 2015

Replies: 4

Graduate KE operator and eigenfunctions

dyn
May 20, 2015 · Replies 16 · May 21, 2015

Replies: 16

Graduate Understanding Quantum Eraser Experiments

alexepascual
May 5, 2015 · Replies 35 · May 21, 2015

2

Replies: 35

Graduate A thought experiment of wavefunction collapse

backward
May 21, 2013 · Replies 9 · May 20, 2015

Replies: 9

Graduate Current conservation beta function

WannabeNewton
May 18, 2015 · Replies 2 · May 20, 2015

Replies: 2

Graduate Can a pilot wave be instantaneous?

Terry M
May 19, 2015 · Replies 4 · May 20, 2015

Replies: 4

Graduate Why does anomaly mean symmetry is broken?

fxdung
May 15, 2015 · Replies 12 · May 20, 2015

Replies: 12

Graduate Quantum Suicide: Why is only experimenter convinced?

greypilgrim
May 15, 2015 · Replies 57 · May 19, 2015

2

Replies: 57

Graduate Feynman rules for nonlinear sigma models

hyperkahler
May 19, 2015 · Replies 1 · May 19, 2015

Replies: 1

Graduate Bound states as a solution of free particles?

pellman
May 19, 2015 · Replies 3 · May 19, 2015

Replies: 3

Graduate Angular momentum of a free Dirac particle

DOTDO
May 19, 2015 · Replies 1 · May 19, 2015

Replies: 1

Graduate Are there separate quantum fields for spin 1/2 particles in modern QFT?

LarryS
May 17, 2015 · Replies 3 · May 19, 2015

Replies: 3

Graduate Software to calculate detection probability for simple cases

Swamp Thing
May 10, 2015 · Replies 1 · May 18, 2015

Replies: 1

Birgit Dopfer's Thesis in English, Please?

Swamp Thing
May 12, 2015 · Replies 4 · May 18, 2015

Replies: 4

Graduate 'Information' in Quantum Physics

Gerinski
May 14, 2015 · Replies 4 · May 18, 2015

Replies: 4

Graduate Why does xenon exhibit more spectral lines than heavier elements like mercury?

Goodver
May 17, 2015 · Replies 1 · May 18, 2015

Replies: 1

Graduate Wavefunctions of Singlet and Triplet States

fayled
May 17, 2015 · Replies 4 · May 18, 2015

Replies: 4

Graduate Calculation of proton's lifetime

aylakadamk
May 12, 2015 · Replies 12 · May 18, 2015

Replies: 12

Graduate Hamiltonian for a free electron in electromagnetic field

athosanian
May 17, 2015 · Replies 4 · May 18, 2015

Replies: 4

Graduate Quantum harmonic oscillators DE wavefunction

moriheru
May 17, 2015 · Replies 2 · May 18, 2015

Replies: 2

Graduate Interpretation of a before $\gamma^{5}$ in J$_{\alpha}$

LupusLupus
May 18, 2015 · Replies 2 · May 18, 2015

Replies: 2

Graduate Equation used to find kinetic energy of proton

darksyesider
May 17, 2015 · Replies 6 · May 17, 2015

Replies: 6

Graduate Feynman rules for Yukawa theory

lefebvre
May 17, 2015 · Replies 3 · May 17, 2015

Replies: 3

Graduate Set of postulates implies postulates of Q.M.?

Spinnor
May 17, 2015 · Replies 4 · May 17, 2015

Replies: 4

Graduate Quantum Computing Explained in 10 Sentences

ChristaSian
May 16, 2015 · Replies 1 · May 16, 2015

Replies: 1

Graduate Why electron doesn't fall on proton, quantum explanation

Tahmeed
May 16, 2015 · Replies 4 · May 16, 2015

Replies: 4

Graduate Can Quarks Break the Strong Nuclear Force?

Noaholter
May 15, 2015 · Replies 1 · May 15, 2015

Replies: 1

Graduate Finding Wavefunction with just the Hamiltonian

metapuff
May 15, 2015 · Replies 1 · May 15, 2015

Replies: 1

Graduate The Optical Theorem (Total cross section?)

Xyius
May 10, 2015 · Replies 3 · May 15, 2015

Replies: 3

Graduate Understanding Recoil in Photon Emission and the Role of Quantum Electrodynamics

Danyon
May 14, 2015 · Replies 3 · May 15, 2015

Replies: 3

Graduate What is the truth behind quantum entanglement?

Rodrigo Cesar
Apr 29, 2015 · Replies 63 · May 15, 2015

3

Replies: 63

Graduate Can Szego Projectors Be Interpreted as POVM in von Neumann Density Context?

Ssnow
May 14, 2015 · Replies 2 · May 15, 2015

Replies: 2

Graduate Holographic Universe. 2D Universe = Matrix?

Kaktus
May 14, 2015 · Replies 8 · May 14, 2015

Replies: 8

Graduate Mediating particles of forces.

marcgrissz
May 14, 2015 · Replies 1 · May 14, 2015

Replies: 1

Graduate New Quantum Physics Theories by 18-Year-Old: Seeking Safe Publication Help

marcgrissz
May 14, 2015 · Replies 4 · May 14, 2015

Replies: 4

Graduate Wick theorem in "QFT for the Gifted Amateur"

Demystifier
May 12, 2015 · Replies 5 · May 14, 2015

Replies: 5

Graduate Descriptions of time evolution: closed vs open systems

TrickyDicky
May 8, 2015 · Replies 2 · May 14, 2015

Replies: 2

Graduate Interference on paper, ground glass etc. surfaces

Swamp Thing
May 14, 2015 · Replies 3 · May 14, 2015

Replies: 3

Graduate Energy-time uncertainty principle

beda
May 13, 2015 · Replies 5 · May 13, 2015

Replies: 5

Graduate Emitting two photons in a single transition?

bcrowell
May 13, 2015 · Replies 6 · May 13, 2015

Replies: 6

Graduate Conditions for interaction in the quantum world

jimmylegss
May 13, 2015 · Replies 1 · May 13, 2015

Replies: 1

Graduate Quantum Reality: Evidence for Everything Happening Simultaneously

Rajkovic
May 13, 2015 · Replies 2 · May 13, 2015

Replies: 2

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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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