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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Graduate Why Do LS and jj Coupling Differ in Spectral Line Transitions?
- bentzy
- · Replies 12 ·
High School Questions about Identical Particles
- hgandh
- · Replies 7 ·
High School If electrons are waves, what causes them to change direction?
- LSMOG
- · Replies 8 ·
Undergrad How can electrostatic fields be composed of photons?
- fox26
- · Replies 30 ·
Graduate Why use continuous math in classical mechanics if reality is discrete
- qttv
- · Replies 12 ·
Undergrad Making sure about the spreads in the Uncertainty Principle
- fog37
- · Replies 6 ·
High School Spin and polarizations in momentum space
- Azurite
- · Replies 51 ·
High School How far apart can electrons be and still violate the Pauli exclusion principle?
- john t
- · Replies 2 ·
High School Do atomic nuclei transfer momentum to electron orbitals?
- Vectronix
- · Replies 3 ·
High School Parity of two-particle state in coupled basis
- hgandh
- · Replies 3 ·
High School Introduction to quantum physics and topological quantum matter
- Arik Salehi
- · Replies 4 ·
Graduate Did nature or physicists invent the renormalization group?
- Giulio Prisco
- · Replies 6 ·
Undergrad Why don't ground-state electrons fall into the nucleus?
- drl
- · Replies 4 ·
High School What happens to things that aren't ever observed?
- McNanners
- · Replies 15 ·
Undergrad Unruh temperature in gravitational field
- jcap
- · Replies 4 ·
Graduate Fundamental Theorem of Quantum Measurements
- Danny Boy
- · Replies 77 ·
Undergrad Macroscopic rotation from spin flipping?
- Toothbrush
- · Replies 13 ·
Graduate What's the best quantum simulator?
- skanskan
- · Replies 9 ·
Undergrad Gauge transformation and observable effects in the Aharanov-Bohm effect
- Ghost Repeater
- · Replies 7 ·
Undergrad Can Optical Angular Momentum Revolutionize Open-Space Light Communication?
- microsansfil
- · Replies 3 ·
Undergrad Can the Schrödinger equation be derived from classical wave assumptions?
- snoopies622
- · Replies 11 ·
Undergrad Weinberg and Ray Transformations – Ch2 App A.
- rocdoc
- · Replies 1 ·
Undergrad Operators and vectors in infinite dimensional vector spaces
- fog37
- · Replies 3 ·
High School What Should You Research About Uncaused Quantum Events and Their Implications?
- sayetsu
- · Replies 10 ·
High School Where Can I find the Einstein vs. Bohr Full Debates
- learis
- · Replies 24 ·
Undergrad Reversible Measurement: Is It Possible?
- A Puzzlement
- · Replies 3 ·
Undergrad Beam splitter in an entanglement swapping experiment
- Mentz114
- · Replies 12 ·
Undergrad How small does a system have to be for QM to be necessary?
- dRic2
- · Replies 6 ·
Undergrad Why is the QCD Lagrangian often abbreviated?
- Kara386
- · Replies 1 ·
Undergrad Is Dirac's Equation Sufficient for Modeling a System of Electrons Without QFT?
- LarryS
- · Replies 6 ·
Undergrad How to create the operator of unknown beamsplitter
- Pattarasak
- · Replies 2 ·
High School Measuring entangled particles along several angles
- Xilor
- · Replies 27 ·
Graduate What is Leakage in terms of quantum computing?
- David Long
- · Replies 2 ·
Graduate What's the idea behind propagators
- Tomishiyo
- · Replies 5 ·
Graduate States in usual QM/QFT and in the algebraic approach
- leo.
- · Replies 5 ·
Undergrad Delayed Choice with both slits closed, What happens?
- Rohan de Silva
- · Replies 10 ·
Undergrad Spin eigenstates for x and y axes: why these specific equations?
- doggydan42
- · Replies 12 ·
Undergrad Thought experiment: Photons in a box
- kent davidge
- · Replies 4 ·
Undergrad Kim et al DCQE optical details
- Derek P
- · Replies 4 ·
Undergrad Does the concept of an "object" belong in Quantum Mechanics?
- Robert Shaw
- · Replies 8 ·
Undergrad Do Different Observers See Different Entangled States in Quantum Mechanics?
- Robert Shaw
- · Replies 5 ·
Graduate What's the energy-spread of the quantum Universe state?
- Robert Shaw
- · Replies 65 ·
Undergrad Generalized coordinates basic question
- nomadreid
- · Replies 5 ·
Undergrad What does "state" mean in quantum mechanics?
- Robert Shaw
- · Replies 18 ·
Undergrad Why is the Uncertainty principle inherent to particles?
- Phys12
- · Replies 11 ·
High School How does the Doppler shift explain changes in photon energy without interaction?
- itoero
- · Replies 16 ·
Undergrad Do we need a reference frame in Quantum Hilbert space?
- Robert Shaw
- · Replies 59 ·
Undergrad Matrix dimensions of parity operator in Dirac field theory
- Silviu
- · Replies 1 ·
Graduate Hermitian conjugate of the derivative of a wave function
- Gene Naden
- · Replies 12 ·
Undergrad Hamiltonian in Schrödinger: necessarily total energy?
- nomadreid
- · Replies 2 ·
Undergrad What is the significance of commuting operators and CSCO in quantum mechanics?
- fog37
- · Replies 11 ·
Undergrad Two questions about "The Physics of Virtual Particles"
- fox26
- · Replies 9 ·
Undergrad Can the Schrodinger equation satisfy Laplace's equation?
- bb1414
- · Replies 3 ·
High School Cooper pairs and Superconductors
- Ben Brain
- · Replies 3 ·
Undergrad Is Superdeterminism a Plausible Explanation for Quantum Mechanics?
- facenian
- · Replies 87 ·
Undergrad Why the second quantization Hamiltonian works?
- MichPod
- · Replies 1 ·
Undergrad How Does Spin Hall Effect Couple Charge and Spin Current?
- semc
- · Replies 1 ·
High School How to increase wave amplitudes
- drl
- · Replies 3 ·
High School What is the result of putting a detector on both slits in the 2 slit experiment?
- drl
- · Replies 26 ·
High School Interference pattern intensity
- Sheldon11
- · Replies 2 ·
Undergrad Explanation of optical phenomena in light of Feynman's Theory
- Wrichik Basu
- · Replies 2 ·
Undergrad Can the Time Independent Schroedinger Equation Be Used to Find Unbound States?
- fog37
- · Replies 41 ·
High School Why can't we find exact position if we know velocity and time change?
- Kiley
- · Replies 11 ·
Graduate What was so extraordinary about Landau damping?
- TheCanadian
- · Replies 3 ·
Undergrad Are fundamental particles like electrons and protons truly matter waves?
- Jianphys17
- · Replies 5 ·
Undergrad Non-Unitary Dynamics: Is it Allowed?
- dumpling
- · Replies 2 ·
Undergrad Projection Postulate vs Quantum Randomness
- LarryS
- · Replies 2 ·
Undergrad Bremmstrahlung in neutral atom collisions
- Getterdog
- · Replies 2 ·
Undergrad Why use complex numbers in quantum wave functions
- Zaya Bell
- · Replies 4 ·
Undergrad How Does Light Emission Affect the Wavefunction of an Atom?
- dumpling
- · Replies 3 ·
Undergrad Do the SU(n) generators represent any observables?
- tomdodd4598
- · Replies 2 ·
Graduate What are some recommended books on non-standard quantum mechanical models?
- SemM
- · Replies 9 ·
Undergrad Disctrete vs continuous spectrum
- Getterdog
- · Replies 18 ·
High School Understanding the Conversion of Energy Forms in Particle Interactions
- TheCanadian
- · Replies 9 ·
Undergrad Do neutral atom collisions affect the continuous nature of black body radiation?
- Getterdog
- · Replies 4 ·
High School Why do material particles interact?
- Vectronix
- · Replies 4 ·
Graduate Can Quantum Mechanics be Studied in Banach Spaces or Other Non-Hilbert Spaces?
- SemM
- · Replies 17 ·
High School How can light be reflected if electrons only absorb or scatter it?
- _PJ_
- · Replies 3 ·
Undergrad Why does observation destroy electron interference differently at different frequencies?
- AhmedHesham
- · Replies 10 ·
Graduate Time independence of a Noether charge in QFT?
- JunhoPhysics
- · Replies 2 ·
Graduate Identical and indistinguishable particles
- Stephen Tashi
- · Replies 16 ·
Undergrad EM Radiation of "Permanent" Molecular Electric Dipoles
- particlezoo
- · Replies 1 ·
Undergrad Higgs field and energy dependence?
- asimov42
- · Replies 16 ·
High School Do unitary operators exist that don't correspond to symmetries?
- hgandh
- · Replies 4 ·
Undergrad Show that the integral of the Dirac delta function is equal to 1
- Doitright
- · Replies 6 ·
Graduate Mathematical Quantum Field Theory - Renormalization - Comments
- Urs Schreiber
- · Replies 9 ·
High School Why do photons stimulate emission in atoms?
- Somali_Physicist
- · Replies 20 ·
Undergrad Srednicki QFT Chapter 4 time-evolved operator
- TeethWhitener
- · Replies 4 ·
Undergrad Do Polarized Atoms Imply Shifted Electron Orbitals?
- Getterdog
- · Replies 2 ·
Undergrad How to experimentally measure a quantum gate
- confused_man
- · Replies 1 ·
Graduate What form of the Schrodinger equation do you use for intensity?
- bluejay27
- · Replies 1 ·
High School Delayed Choice Quantum Eraser Experiment Results
- Suleyman EROGLU
- · Replies 4 ·
Undergrad Noble Gases vs. Halogens: Which Has a Greater Atomic Radius?
- rpthomps
- · Replies 1 ·
Undergrad Ground state energy of harmonic oscillator with momentum-dependent potential term
- Apashanka das
- · Replies 14 ·
Undergrad Representing a Hamiltonian in an operator form
- nashed
- · Replies 4 ·
Undergrad Phase, Bloch sphere versus Feynman path
- nomadreid
- · Replies 2 ·
Graduate Probability of obtaining general quantum measurement outcome
- Danny Boy
- · Replies 2 ·
Undergrad Can a Pure State be Interpreted as a Mixed State for a Single Particle?
- nomadreid
- · Replies 13 ·
High School Preserving causality in the EPR experiment
- kurt101
- · Replies 27 ·
Undergrad How Do Oscillations and Interference Define Particles in Quantum Field Theory?
- FilipLand
- · Replies 12 ·