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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High School Is quantum coherence a random event?
- arnell7
- · Replies 23 ·
High School Does a black hole capture part of a photon's superposition?
- Isambard
- · Replies 12 ·
Undergrad Blackbody radiation in quantum mechanics
- Malamala
- · Replies 4 ·
Undergrad What are the Misconceptions Surrounding Virtual Particles?
- Ranku
- · Replies 17 ·
Undergrad Decoherence and direction of causality
- entropy1
- · Replies 1 ·
Graduate Simple S matrix example in Coleman's lectures on QFT
- Glenn Rowe
- · Replies 3 ·
Graduate Is there still a collapse problem after decoherence?
- Heidi
- · Replies 7 ·
Graduate Anharmonic oscillators with closed-form solutions
- hilbert2
- · Replies 10 ·
Graduate Fidelity between initial and final states
- deepalakshmi
- · Replies 85 ·
Undergrad Nature of Collision in Compton Scattering
- neilparker62
- · Replies 4 ·
Undergrad What is the origin of translational motion?
- Maurice Morelock
- · Replies 10 ·
High School Question re photons/EM waves and the double slit experiment
- profbuxton
- · Replies 7 ·
Undergrad The Meaning of Basis States in Quantum Mechanics
- BigMax
- · Replies 8 ·
Graduate Could QM Arise From Wilson's Ideas
- bhobba
- · Replies 115 ·
Graduate Knill-Laflamme condition Shors code
- steve1763
- · Replies 1 ·
Undergrad Are density matrices part of a real vector space?
- Gere
- · Replies 9 ·
Undergrad Momentum in electromagnetic waves
- Ahsan Khan
- · Replies 1 ·
Undergrad Feynman's description of the quantum behaviour of an ammonia molecule
- Roby002
- · Replies 11 ·
High School Do eigenstate probabilities change with time?
- sgphysics
- · Replies 2 ·
High School Could Spontaneous symmetry breaking cause momentum change in an atom?
- Matthew-Champion
- · Replies 4 ·
Undergrad Vacuum energy and Energy conservation
- Ebi Rogha
- · Replies 3 ·
High School Is quantum superposition involved in the Stern-Gerlach experiment?
- Curious Cat
- · Replies 10 ·
Undergrad Determining Momentum from Wavefunction
- FermiDIrac19
- · Replies 13 ·
High School How does quantum superposition really work?
- Curious Cat
- · Replies 4 ·
Undergrad Uncertainty principle equation for virtual particles
- Ebi Rogha
- · Replies 6 ·
Undergrad What is the quantum spin of a single electron in an (atomic) orbital?
- Curious Cat
- · Replies 1 ·
Graduate How to derive the Momentum and Energy Operators from first principles?
- Svend
- · Replies 3 ·
Undergrad Developing Quantum Expressions using QUBO
- rpthomps
- · Replies 1 ·
Undergrad Why Does Molecular Potential Energy Curve Have That Specific Shape?
- Dario56
- · Replies 26 ·
Undergrad How to recalculate Berry phase dipole moments (jumps over time)?
- bumblebee77
- · Replies 5 ·
Undergrad Dirac equation in the hydrogen atom
- Malamala
- · Replies 1 ·
Undergrad Observables on the "3 polarizers experiment"
- DougFisica
- · Replies 2 ·
High School Two double slits in series: interference pattern through cascaded apertures
- Myslius
- · Replies 3 ·
Graduate Do renormalization and field regularization address the same infinities?
- Jarek 31
- · Replies 28 ·
Undergrad Schrodinger Cat states in terms of Displacement Operator
- deepalakshmi
- · Replies 8 ·
Graduate Time evolution of coherent state with vacuum
- deepalakshmi
- · Replies 2 ·
High School Can black holes be quantum entangled with stars?
- Antman0115
- · Replies 5 ·
Graduate Trace of Numerator in QED vacuum polarization
- Elmo
- · Replies 2 ·
Graduate What's the meaning of mean photon number?
- Tspirit
- · Replies 10 ·
Graduate Understanding how quantum annealing solves QUBO problems
- siddjain
- · Replies 1 ·
Undergrad Discussion about quantum mechanics and spacetime
- docnet
- · Replies 1 ·
Undergrad How Do We Model Wave Function Collapse After Measuring Particle Location?
- Sciencemaster
- · Replies 8 ·
Undergrad Common features of set theory and wave functions?
- Hallucinogen
- · Replies 4 ·
Undergrad Perturbation theory with two parameters?
- Amentia
- · Replies 3 ·
Undergrad Commutation of Beam splitter operator with Displacement operator
- deepalakshmi
- · Replies 1 ·
Undergrad What does it really mean that photons are quanta of light?
- Ebi Rogha
- · Replies 15 ·
Graduate Infinities in QFT (and physics in general)
- Demystifier
- · Replies 113 ·
Graduate Cat state acting on given Hamiltonian
- deepalakshmi
- · Replies 1 ·
Graduate What are cat states in quantum mechanics?
- deepalakshmi
- · Replies 1 ·
Graduate What is the legacy of Sidney Coleman?
- robphy
- · Replies 3 ·
Undergrad Observing a double-slit experiment
- oknow
- · Replies 14 ·
Undergrad How big is a photon - Interesting video
- BvU
- · Replies 13 ·
High School Why is there now evidence of a lag time in the photoelectric effect?
- qnt200
- · Replies 10 ·
Undergrad Software for optical simulation with interference
- Erik Ayer
- · Replies 2 ·
Undergrad Spin spin coupling problem an electron/positron system
- Hayam ramadan
- · Replies 1 ·
Graduate Derivation of recovery channel for bit flip error
- steve1763
- · Replies 1 ·
Graduate Relationship between Larmor precession and energy eigenstates
- docnet
- · Replies 15 ·
Graduate How Does One Calculate the Time Evolution of a Photon in a Vacuum State?
- deepalakshmi
- · Replies 1 ·
Undergrad How does Ballentine's propagator definition relate to the evolution operator?
- jbergman
- · Replies 15 ·
Graduate Understanding Local and Nonlocal Operators in Quantum Field Theory
- MathematicalPhysicist
- · Replies 167 ·
Graduate I am looking for an example of a Fredholm module
- Heidi
- · Replies 3 ·
Undergrad Differentiated Sakharov Equation for Vacuum Fluctuations
- Dubbelosix
- · Replies 1 ·
High School Does Schrödinger's Cat Know Its Own Fate?
- oknow
- · Replies 17 ·
High School Does time lose significance in quantum entanglement?
- beans1971
- · Replies 2 ·
Undergrad Gauge Theory and Fiber Bundles
- knowwhatyoudontknow
- · Replies 11 ·
Undergrad Can we distinguish photon intrinsic nature from measurement effects?
- Ebi Rogha
- · Replies 13 ·
Undergrad Proving the Schrodinger Equation
- thegroundhog
- · Replies 1 ·
Undergrad Rayleigh scattering VS Raman scattering
- Ebi Rogha
- · Replies 3 ·
Undergrad Entangled particles in black hole decay?
- nomadreid
- · Replies 11 ·
Undergrad [Quantum Computing] Quantum Parallelism State Calculation
- llha
- · Replies 1 ·
Graduate Bootstrapping quantum Yang-Mills with concrete axioms
- BohmianRealist
- · Replies 2 ·
Undergrad Output of down converted beam not proportional to input beam power?
- Spinnor
- · Replies 1 ·
High School Kim and Scully delayed eraser, interference curve form
- jeremyfiennes
- · Replies 11 ·
Undergrad Orbitals and selection rules in a synchrotron
- snorkack
- · Replies 18 ·
Undergrad Can a single photon be reflected by a mirror?
- Ebi Rogha
- · Replies 3 ·
Undergrad Quantum vs Classical multiphoton interference on double slit
- MichPod
- · Replies 17 ·
Graduate QM is Feynman path ensemble - is QFT Feynman field ensemble?
- Jarek 31
- · Replies 89 ·
Undergrad Does decoherence mean the loss of entanglement?
- Haorong Wu
- · Replies 1 ·
Undergrad Is there a way to calculate the frequency of an electron wave?
- Dyon
- · Replies 1 ·
Graduate Jaynes-Cummings Density Operator Evolution
- stephen8686
- · Replies 1 ·
Undergrad Why are there no probability amplitudes in MWI?
- entropy1
- · Replies 7 ·
Undergrad "Counterfactual definiteness" vs. "free will"
- greypilgrim
- · Replies 102 ·
Undergrad Numerically solving Time-independent Schrödinger eqn. using Shooting algorithm
- Wrichik Basu
- · Replies 20 ·
Graduate Spin-One Klein Gordon Equation
- Jogging-Joe
- · Replies 3 ·
Undergrad How to explain vacuum fluctuations to high school students
- raracon
- · Replies 1 ·
Graduate Fermilab's muon g-2 experiment and hints of new physics
- physicoed
- · Replies 2 ·
Undergrad Uncertainty principle##\Delta H\Delta Q##, where Q is time-independent
- Foracle
- · Replies 1 ·
Undergrad It seems that the eigenvalue problem rules out the possibility of E=0?
- BHL 20
- · Replies 5 ·
High School Entangled protons in a uniform magnetic field?
- docnet
- · Replies 20 ·
Graduate Bell's theorem: Local realism v. counterfactual determinism
- zvi
- · Replies 2 ·
Undergrad Is quantum mechanics imply nature is deterministic or probabilistic?
- Pipsqueakalchemist
- · Replies 8 ·
Undergrad Two Ways of Calculating the Solution to the Infinite Square Well?
- JohnH
- · Replies 28 ·
Graduate Why are we allowed to use the trace cyclicity here?
- Heidi
- · Replies 2 ·
Graduate What problem arises from the second time derivative in the Klein-Gordon equation?
- koustav
- · Replies 12 ·
Undergrad Einstein-Bohr "photon box" debate and general relativity
- Giulio Prisco
- · Replies 20 ·
Undergrad Schrodinger Equation as Flow Equation
- lagrangman
- · Replies 2 ·
High School Which book is best for learning about quantum entanglement?
- edukso
- · Replies 3 ·
Undergrad Is the Wavefunction a Contravariant Component?
- JohnH
- · Replies 47 ·
Graduate Quantum superposition: Is a problem of space-time worldview?
- sergiokapone
- · Replies 1 ·
Undergrad How Does Quantum Negativity Vary with Partial Transposes in Bipartite Systems?
- Jufa
- · Replies 1 ·