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.
Sub-forums
Threads
Graduate Why is the hidden variable theory wrong?
- Taturana
- · Replies 4 ·
Graduate Parity operator and change of variable question
- andresordonez
- · Replies 2 ·
Graduate Does the Elitzur-Vaidman bomb tester reveal photon paths?
- prajor
- · Replies 41 ·
Graduate Pan proto experientialism and the quantum exchange interaction
- Iforgot
- · Replies 14 ·
Graduate Negative Probability: Is It Possible?
- sairajagopal
- · Replies 2 ·
Graduate Classical radius of nucleons and quarks
- relativityfan
- · Replies 4 ·
Graduate Probability of Polarization Amplitudes - Frank's Question
- frankinstein
- · Replies 2 ·
Graduate Why can't measuring one particle's position and the other's momentum violate uncertainty?
- LucasGB
- · Replies 5 ·
Graduate How to Experimentally Obtain Wavefunction Parameters?
- Waxterz
- · Replies 1 ·
Graduate QFT around fixed classical backgrounds
- twoform
- · Replies 1 ·
Graduate On the quantum physical theory of scattering
- Void123
- · Replies 1 ·
Graduate Is the Product of Expectation Values Always True in Quantum Mechanics?
- daudaudaudau
- · Replies 3 ·
Graduate Why Does the Domain Transform to Keep the Time Dependent Operator Self Adjoint?
- tommy01
- · Replies 5 ·
Graduate Ground State Parity in One-Dimensional Potentials
- orienst
- · Replies 1 ·
Graduate Can Quantum Tunneling Enable Controlled Thermonuclear Fusion?
- Pooua
- · Replies 9 ·
Undergrad Do Photons Spin in Our Reference Frame?
- scope
- · Replies 4 ·
Graduate The spectral theorem and Hamiltonians
- AxiomOfChoice
- · Replies 12 ·
Graduate Adding Angular Momenta: Rules of Thumb?
- Heirot
- · Replies 2 ·
Graduate Hermitian conjugate of spinor product (Srednicki ch 35)
- LAHLH
- · Replies 2 ·
Graduate What is the furthest distance particles can interact and still become entangled?
- DWRLRX
- · Replies 1 ·
Graduate What does this notation mean exactly?
- Demon117
- · Replies 4 ·
Graduate Origin of Photons Irrelevant in Double Slit Experiment?
- Orionabc
- · Replies 10 ·
Graduate Why in nature there is no spinless fermion?
- wdlang
- · Replies 5 ·
Graduate Special case of energy value for a particle in a non zero potential region
- fluidistic
- · Replies 2 ·
Graduate What does quantization mean for electromagnetic fields?
- snoopies622
- · Replies 6 ·
Graduate How long does a photon from electron-positron annihilation live?
- vivitar02
- · Replies 28 ·
Graduate Euclidean geometry doesn't exist?
- K1NS
- · Replies 8 ·
Graduate Do photons create new photons when they interact with matter?
- vivitar02
- · Replies 3 ·
Graduate Heisenberg equation of motion for fermions?
- pellman
- · Replies 7 ·
Undergrad Can Energy Gaps Determine Electron Excitation and Decay?
- Denver Dang
- · Replies 1 ·
Graduate Elitzur–Vaidman Bomb-Tester Extension for Boolean Variable Return
- viralplatipus
- · Replies 2 ·
Graduate What qualifies as an observer in Schrödinger's cat?
- Quinzio
- · Replies 21 ·
Graduate The Polarization of electron ?
- inkbath
- · Replies 1 ·
Graduate Wave Particle Duality and its relation to the Wave Function
- torquerotates
- · Replies 2 ·
Undergrad How is heat caused by photons?
- Moviemann345
- · Replies 38 ·
Graduate Uncertainty principle and angular momentum
- Upisoft
- · Replies 1 ·
Graduate Time and alternate realities/universe
- Shawakaze
- · Replies 2 ·
Graduate Signicance of positive and negative frequencies?
- pellman
- · Replies 3 ·
Graduate Quantized Dirac Field Interacting with a Classical Potential
- maverick280857
- · Replies 5 ·
Graduate Is the anti-Zeno effect experimentally verified and accepted?
- relativityfan
- · Replies 1 ·
Graduate Does an electron probe all paths in a circuit before taking the easiest one?
- Deo
- · Replies 7 ·
Graduate Position-Momentum Uncertainty Principle
- relativityfan
- · Replies 1 ·
Graduate Program for Traces of Dirac matrices
- PJK
- · Replies 4 ·
Graduate Why does a particle localized in a well spread out over time?
- notojosh
- · Replies 1 ·
Graduate What is quantum foam?
- filegraphy
- · Replies 1 ·
Graduate Very basic question(s) about photons
- candyred312
- · Replies 13 ·
Graduate Mass terms in quantum field theory
- voltan
- · Replies 3 ·
Graduate Why must the wavefunction be continuous in quantum mechanics?
- kuahji
- · Replies 24 ·
Graduate Operator B has a commutator [A,B]
- Christine90NY
- · Replies 1 ·
Graduate Difference between quantum state and orbital
- nyxynyx
- · Replies 3 ·
Boundary terms in hilbert space goes vanish
- notojosh
- · Replies 1 ·
Graduate Understanding Hermitian Conjugates of $\psi^{\dag}\bar{\sigma}^{\mu}\chi$
- LAHLH
- · Replies 29 ·
Graduate What is the significance of the number 137 in quantum physics?
- AfRoMaNn
- · Replies 7 ·
Graduate Turing machine and quantum computers
- bifolco84
- · Replies 1 ·
Graduate Second order correction to the wavefunction
- robbo96
- · Replies 1 ·
Graduate Chain rule for functions of operators?
- pellman
- · Replies 8 ·
Graduate Dyson-Wick formalism in second-order QED - trouble with derivation
- Sojourner01
- · Replies 4 ·
Graduate Light-front coordinates and the vacuum.
- Jezuz
- · Replies 2 ·
Graduate What Conditions Must a Matrix Meet to Be a Density Matrix?
- natugnaro
- · Replies 7 ·
Graduate Space-Time — Momentum-Energy uncertainty relations
- etamorphmagus
- · Replies 17 ·
Graduate Counting and Grouping Feynman Diagrams
- tshafer
- · Replies 3 ·
Graduate Deriving Equation (3) from A. Zee's "QFT in a Nutshell" Chapter I.5
- kexue
- · Replies 4 ·
Graduate Can Linear Combinations of Non-Degenerate Eigenstates Form New Eigenstates?
- amir11
- · Replies 2 ·
Graduate Do Massless Particles Interact in Particle Physics?
- taylrl3
- · Replies 6 ·
Graduate Is Quantum Mechanics Linked to Divine Action?
- ikos9lives
- · Replies 2 ·
Graduate Difference among energy level,energy state and quantum state
- ELVIS0206
- · Replies 1 ·
Graduate Proof that commuting operators have a shared base of eigenfunctions
- jakotaco
- · Replies 3 ·
Graduate Fine structure, and hyperfine structure
- Denver Dang
- · Replies 3 ·
Graduate Is intrinsic momentum a fundamental property of particles?
- wdlang
- · Replies 12 ·
Graduate Spin-1/2 Particle Transformation: Spin-Z to Spin-X
- RedX
- · Replies 2 ·
Graduate How does the concept of wave functions apply to large objects?
- Ty1erC
- · Replies 1 ·
Graduate How Can Photons Be Manipulated to Move in the Same Direction?
- Novice4Life
- · Replies 8 ·
Graduate What Happens to a Charged Particle When Its Oscillator Potential Vanishes?
- relativist
- · Replies 1 ·
Graduate Elementary question:[A,B] = [A-<A>, B-<B>]
- nomadreid
- · Replies 3 ·
Graduate Does it make sense to define operators like r,theta, phi
- kof9595995
- · Replies 6 ·
Graduate Question on Completeness of a set of Eigenstates
- JK423
- · Replies 12 ·
Graduate Home Quantum Physics Experiments
- jimjones
- · Replies 22 ·
Graduate Single slit diffraction experiment
- svnaras
- · Replies 4 ·
Graduate Is there gravity at small scales?
- petm1
- · Replies 2 ·
Graduate Wondering about the origins of light?
- jeebs
- · Replies 10 ·
Graduate Zeroes of zeta function as energy levels?
- nomadreid
- · Replies 2 ·
Graduate The meaning (and validity) of fractional occupations in QM
- Einstein Mcfly
- · Replies 1 ·
Graduate Negative pressure in quantum mechanics
- relativityfan
- · Replies 2 ·
Graduate Measurement of two components of electron spin
- starfish99
- · Replies 8 ·
Graduate S-matrix formula from Lippmann-schwinger eqn
- muppet
- · Replies 1 ·
Graduate Scale of uncertainty principle
- rahuljayanthb
- · Replies 5 ·
Graduate Are Degenerate Energy Levels the Same as Ground States in Quantum Mechanics?
- Denver Dang
- · Replies 4 ·
Graduate Fundamental Measurement of Subatomic Particles: Techniques and References
- comote
- · Replies 3 ·
Graduate Wondering about the particle treatment of light?
- jeebs
- · Replies 1 ·
Graduate Where is the Electron in Schrodinger's Cat Paradox?
- scilover89
- · Replies 33 ·
Graduate Is action truly an observable in physics?
- JustinLevy
- · Replies 27 ·
Graduate How do we associate real measurements with theoretical quantities?
- pellman
- · Replies 9 ·
Graduate Rotational Invariance: Bosons vs Fermions
- relativityfan
- · Replies 4 ·
Graduate Does matter convert to photons only?
- HeisenbergSon
- · Replies 11 ·
Graduate Transitions caused by circularly polarized light
- The_Duck
- · Replies 1 ·
Graduate How Can I Improve My Understanding of NMR Modeling and Experiments?
- phygiks
- · Replies 7 ·
Graduate Analogue of the S.E. for photons?
- TriKri
- · Replies 8 ·
Graduate Why is entanglement essential for quantum computing?
- zZhang
- · Replies 1 ·
Graduate Minkowski vacuum: Poincare invariant, quasi-free state
- paweld
- · Replies 2 ·
Graduate Fock space in interaction theory
- ismaili
- · Replies 3 ·