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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Undergrad A few questions about particles.
- brianthewhitie7
- · Replies 18 ·
Graduate Harmonic Oscillator, Ladder Operators, and Dirac notation
- MaximumTaco
- · Replies 4 ·
Undergrad Intensity of light constantwhy rate of emission of electrons changes?
- samsool
- · Replies 1 ·
Graduate Entanglement: What is it and how is it measured?
- cybercrypt13
- · Replies 11 ·
Undergrad Understanding Quantisation: Definition and Examples for Clear Understanding
- logearav
- · Replies 14 ·
Graduate Uncertainty of when a photon is absorbed
- free_electron
- · Replies 10 ·
Graduate Probability Density of Electron in EM & Matter Waves
- nklohit
- · Replies 4 ·
Graduate Godel incompletness related to physics?
- tachyons
- · Replies 14 ·
Graduate Another misleading observer example, or not?
- Cane_Toad
- · Replies 5 ·
Graduate Measuring instant changes in particles
- cybercrypt13
- · Replies 3 ·
Graduate Is State 1 the Cause of State 2 or Vice Versa?
- Ambitiousteen
- · Replies 7 ·
Graduate Question on observer created reality
- Apak
- · Replies 179 ·
Graduate Tom Green says I'm wrong about Quantum Physics
- TheOverman
- · Replies 16 ·
Graduate Frustrated total internal reflection
- Sonden
- · Replies 5 ·
Graduate Understanding Velocity and Momentum: Unraveling the Uncertainty Principle
- guapig
- · Replies 5 ·
Graduate What Physics Formula Applies to Particles Smaller Than 10^-10?
- brianthewhitie7
- · Replies 4 ·
Graduate Electromagnetic Momentum & Force: QM & Wave Analysis
- celestra
- · Replies 2 ·
Graduate Understanding the Limitations of WKB Approximation in One-Dimensional Problems
- InGaAsP
- · Replies 1 ·
Undergrad How is light experimentally proven to be a particle?
- prasannapakkiam
- · Replies 47 ·
Graduate Necessity of Continuous Wave Functions
- eoghan
- · Replies 20 ·
Graduate What is spin up and spin down?
- davidong3000
- · Replies 74 ·
Graduate Why Is Classical Dirac's Field Considered to Have No Physical Meaning?
- jostpuur
- · Replies 14 ·
Undergrad What does * mean and how is it used
- chrismariesan
- · Replies 3 ·
Undergrad Eigenvalues for particle in finite square well
- poder17
- · Replies 1 ·
Graduate Another doubt regarding wavefunction.
- james1234567890
- · Replies 2 ·
Graduate Can someone explain the Schrödinger equation?
- bleucanary256
- · Replies 4 ·
Graduate English Translations of Original QM Sources: Find Textbook & Papers
- phyfor
- · Replies 4 ·
Graduate Why Does the Electron Not Fall Toward the Nucleus in QM?
- ClubDogo
- · Replies 14 ·
Graduate How can this possible tricky situation be explained?
- james1234567890
- · Replies 7 ·
Graduate OK Corral: Local versus non-local QM
- wm
- · Replies 246 ·
Graduate Quantization of EMR in charge acceleration
- DeepQ
- · Replies 7 ·
Graduate Imaginary Action Friends: Ann. Phys. & Textbook for Tunneling
- plxmny
- · Replies 4 ·
Graduate Fundimental frequency of subatomic particles.
- Jdo300
- · Replies 6 ·
Graduate Field operators in canonically transformed representations of the CCRs
- David Baker
- · Replies 5 ·
Graduate What will happen in the following scenario?
- james1234567890
- · Replies 4 ·
Graduate Double Slit Experiment with Interference Patterns
- daniel_i_l
- · Replies 3 ·
Undergrad Similarities/differences between EM waves and particle waves
- Joza
- · Replies 1 ·
Graduate Statistical Quantum good question
- adelveis
- · Replies 1 ·
Graduate What Happened to Heisenberg's Constant in Planck Units?
- droog
- · Replies 3 ·
Graduate Minimum energy for a spin flip?
- pivoxa15
- · Replies 1 ·
Graduate Is Quantum Probability Shaping Our Understanding of Particle Behavior?
- fizzzzzzzzzzzy
- · Replies 1 ·
Graduate No experiment can be repeated? (2 questions)
- moe darklight
- · Replies 21 ·
Graduate How much does the uncertainty in position increase with time?
- Fredrik
- · Replies 4 ·
Graduate What is the role of time evolution in the behavior of different types of waves?
- Swapnil
- · Replies 1 ·
Graduate Double Slit Experiment: Questions and Answers
- underworld
- · Replies 6 ·
Graduate How long do photons live not in a vacum?
- brianthewhitie7
- · Replies 3 ·
Graduate Non-local Realistic theories disproved
- DrChinese
- · Replies 17 ·
Graduate How Many People Actually Understand QM?
- Giuseppe Mayart
- · Replies 58 ·
Graduate Quantum mechanics and spacetime
- AnssiH
- · Replies 16 ·
Graduate Why probilities and not definates.
- Wizardsblade
- · Replies 19 ·
Graduate If, as Richard Feyman insisted, nobody understands quantum mechanics
- Bob Eldritch
- · Replies 63 ·
Graduate Fourier transform limited photons?
- Baggio
- · Replies 6 ·
Graduate How is a particle's spin detected in quantum mechanics?
- cybercrypt13
- · Replies 26 ·
Graduate Quantum nonlocality without hidden variables: An algorithmic approach
- Demystifier
- · Replies 8 ·
Graduate WKB and perturbation theory.
- tpm
- · Replies 1 ·
Graduate Renormalization differential equation ?
- tpm
- · Replies 2 ·
High School Life Span of a Photon - Photonics.com
- dlgoff
- · Replies 1 ·
Graduate Thermal equilibration of a quantum system
- christianjb
- · Replies 12 ·
Graduate Tunneling electrons through a magnetic dielectric
- plxmny
- · Replies 2 ·
Graduate Angular momentum quantum numbers
- BeauGeste
- · Replies 6 ·
Graduate Understanding the idea of coherence
- acme37
- · Replies 2 ·
Graduate The potential step and Tunneling
- Learner88
- · Replies 1 ·
Graduate How would you define Frequency in terms of quantum model?
- kokok
- · Replies 6 ·
Graduate Polarizers spectrum selectivity
- beda pietanza
- · Replies 2 ·
Graduate Measuring two dynamic quantitites
- fkliment2000
- · Replies 2 ·
Graduate Proving Symmetry of Solutions in 1D Potential
- maethros
- · Replies 7 ·
Graduate At Absolute Zero: Examining He Atom Universes
- pivoxa15
- · Replies 2 ·
Graduate Values of the agular momentum quantum number
- fkliment2000
- · Replies 3 ·
Graduate Quantum mechanics: Myths and facts
- Demystifier
- · Replies 37 ·
Graduate What Are Coherent States and Their Relation to Perfect Solutions?
- impendingChaos
- · Replies 7 ·
Graduate Can an Infinite Potential Barrier Conserve Energy in Real Life Scenarios?
- dakold
- · Replies 8 ·
Graduate Standard deviation of expectation values
- neu
- · Replies 2 ·
Graduate One more question about Young's double slit experiment
- ErectusX
- · Replies 1 ·
Graduate Question about electron tunneling
- plxmny
- · Replies 4 ·
Graduate Good Quantum Numbers: Helicity & Invariants
- touqra
- · Replies 2 ·
Graduate Cool research: quantum secrets of photosynthesis
- interested_learner
- · Replies 1 ·
Graduate Why do light particles behave like waves?
- cybercrypt13
- · Replies 39 ·
High School A question and theory about light
- Mato2
- · Replies 34 ·
Graduate Something that's bothered me for a while
- Manchot
- · Replies 2 ·
Graduate Does this hold in general ? (as an approximation only)
- tpm
- · Replies 1 ·
Graduate Position vs. Harmonic basis for solving S.E.
- christianjb
- · Replies 6 ·
Graduate Functional integral (semiclassic formula)
- tpm
- · Replies 2 ·
Graduate Questions About Electromagnetic Radiation from Electricl Discharge
- JOHNYEOH
- · Replies 3 ·
Graduate Is Time Quantized? Investigating the Possibility
- Wizardsblade
- · Replies 3 ·
Undergrad Why is the average moment of a dipole zero?
- MathematicalPhysicist
- · Replies 3 ·
Undergrad Integers in Bohr's atomic theory
- Rothiemurchus
- · Replies 5 ·
Graduate Solving Supersymmetry Q: U_R(1) Symmetry & theta*Q
- alphaone
- · Replies 1 ·
Graduate How is the conjugate momentum defined in the Schrödinger picture of QFT?
- alphaone
- · Replies 1 ·
Graduate Hidden Variable: The Role of Genetics and Parents in Twins
- beda pietanza
- · Replies 1 ·
Graduate Why Don't Electrons Fall into the Nucleus Despite the Coulomb Force?
- IMGOOD
- · Replies 24 ·
Graduate Is there no energy conservation?
- nevo
- · Replies 7 ·
Undergrad Majorana Equation Explained for Newbies
- WeakCarrier
- · Replies 2 ·
Graduate Quantum Mechanics: Equal Probabilities Explained
- fireball3004
- · Replies 6 ·
Graduate Divergence of a partition function
- lalbatros
- · Replies 9 ·
Graduate Degenerate perturbation theory question
- gulsen
- · Replies 2 ·
Graduate Atom's Place and Speed: A Curious Question
- Wilsh
- · Replies 6 ·
Undergrad Interference Pattern: Non-Laser Light Sources
- Quantumgravity
- · Replies 8 ·
Graduate Can a single proton be trapped in a Penning trap? And what happens to it?
- bogie
- · Replies 1 ·
Graduate Degeneracy in 3-D Rectangular Boxes: Explained
- judonight
- · Replies 4 ·
Graduate 2 slit trouble with vapor trails
- oompa
- · Replies 3 ·