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.
Threads
Undergrad Definition of magnetic moment in quantum mechanics
- Kashmir
- · Replies 6 ·
Undergrad Does it make sense to speak about the Grandfather paradox in QM?
- jordi
- · Replies 3 ·
Undergrad Hamiltonian of a particle in a magnetic field
- Kashmir
- · Replies 10 ·
Graduate Majorana representation of higher spin states
- fsh26
- · Replies 1 ·
Graduate Why Is Dissociation Rate Proportional to Current Raised to the Power of N?
- Piki
- · Replies 1 ·
Graduate Definition of finite size, radiative and weak magnetism corrections
- angweieng
- · Replies 3 ·
High School Does the Schrödinger Equation Imply a Deterministic Universe?
- Physics Slayer
- · Replies 4 ·
Graduate Entangled particles in curved spacetime
- Heidi
- · Replies 4 ·
Undergrad Exact dynamics of spin in varying magnetic field
- KDPhysics
- · Replies 1 ·
Graduate About Ruling Out Real-Valued Standard Formalism of Quantum Theory
- Haorong Wu
- · Replies 20 ·
Undergrad Quantum Mechanics without time?
- entropy1
- · Replies 9 ·
Undergrad Projection postulate and the state of a system
- Kashmir
- · Replies 9 ·
Undergrad Informational Interpretation of quantum mechanics?
- Mgt3
- · Replies 2 ·
Undergrad Spin, pseudo-spin or whatelse? (cavity)Polariton polarimetry question
- dchafatinos
- · Replies 4 ·
Undergrad The determination of a particle's spin
- Randall71284
- · Replies 4 ·
High School Can probability waves be "focused"?
- Grinkle
- · Replies 14 ·
Undergrad How can we observe and measure interacting vacuum?
- victorvmotti
- · Replies 1 ·
Undergrad How should we interpret the Möbius-strip image of spinors?
- pellis
- · Replies 1 ·
Undergrad Why ##S_z|+\rangle=\frac{\hbar}{2}|+\rangle##
- Kashmir
- · Replies 8 ·
Undergrad Frequency of EM waves in classical and quantum physics
- donniedarko
- · Replies 26 ·
High School What proof do we have of wave functions?
- Physics Slayer
- · Replies 16 ·
Undergrad Bell's inequality and locality constraints in probability theory
- Killtech
- · Replies 93 ·
Graduate Combining quantum Zeno effect and delayed choice eraser in beryllium trap
- hyksos
- · Replies 18 ·
High School Unitarity in GR+QFT: Obeying Full QG Model?
- Question69
- · Replies 2 ·
High School Wave-Particle Duality -- When is it a wave and when is it a particle?
- alexandrinushka
- · Replies 27 ·
Undergrad What is the difference between charge and force carriers?
- JohnH
- · Replies 3 ·
Undergrad X-ray fluorescence photons question
- GTrax
- · Replies 5 ·
Graduate Measurements at the LHC and field collapse in quantum field theory
- Jdeloz828
- · Replies 31 ·
High School Can entangled particle measurements transmit information faster than light?
- LozD
- · Replies 41 ·
Graduate Counting on a computing system
- thidmir
- · Replies 5 ·
Undergrad Where do these time derivatives of Pauli matrices come from?
- docnet
- · Replies 4 ·
Undergrad What Is the Diameter of a Photon?
- LightningInAJar
- · Replies 25 ·
Graduate Feynman propagator for a simple harmonic oscillator
- Glenn Rowe
- · Replies 9 ·
Undergrad CQED understanding superconducting qbits circuits
- maajdl
- · Replies 2 ·
Undergrad Setting up a double-slit experiment with which-way detection
- L1ght
- · Replies 6 ·
High School Are there any empirical tests for the GRW extension of quantum mechanics?
- Question69
- · Replies 45 ·
Undergrad Entropic effects of the Uncertainty Principle?
- oknow
- · Replies 2 ·
Undergrad Young's Double Slit Experiment: Is it Possible?
- Heidi
- · Replies 3 ·
Graduate What Are the Dimensions of Hilbert Space Elements in Quantum Mechanics?
- Ravi Mohan
- · Replies 14 ·
Undergrad What is the spin-boson model for decoherence in a Penning trap?
- Malamala
- · Replies 2 ·
Undergrad Quantization of the electromagnetic field
- Konte
- · Replies 5 ·
Graduate Perturbative Renormalization in Phi 4 Theory
- Diracobama2181
- · Replies 1 ·
Undergrad Angular momentum of an atom within a rigid body in motion
- james fairclear
- · Replies 61 ·
High School Peculiar View of Density Matrices: Is There a Problem?
- Heidi
- · Replies 3 ·
Graduate Loop Quantum gravity or String theory?
- areehantgupta
- · Replies 10 ·
Undergrad Frontiers in Physics had 2 papers quest. Bell's theorem, any othrs?
- ndvcxk123
- · Replies 2 ·
Undergrad Does entanglement interfere with causality?
- student34
- · Replies 35 ·
Undergrad Physical interpretation of this coherent state
- ergospherical
- · Replies 3 ·
Undergrad How should I think about decoherence?
- Malamala
- · Replies 17 ·
Undergrad Continuous Spectrum and Energy levels of Electrons (Energy Bands)
- ktmsud
- · Replies 7 ·
High School Tardigrade is first multicellular organism to be quantum entangled
- CoolMint
- · Replies 42 ·
Graduate Renormalization with hard cutoff of a loop diagram with single vertex
- theittsco
- · Replies 1 ·
High School Quantum Decoherence: What Happens to Other Outcomes?
- Question69
- · Replies 7 ·
Undergrad Matrix elements of scalars under parity inversion
- ergospherical
- · Replies 5 ·
Graduate Why is gauge invariance important in quantum mechanics?
- Heidi
- · Replies 10 ·
Graduate Degenerate Perturbation Theory: Correction to the eigenstates
- Kaguro
- · Replies 2 ·
Graduate In QFT, what is the momentum of a created particle?
- Christian Thom
- · Replies 12 ·
Undergrad Are all (pure) states physically realizable?
- einheit
- · Replies 11 ·
Undergrad Blue lights (LEDs) consume more power than red (and green)?
- Metals
- · Replies 25 ·
Undergrad When does an even potential give both even and odd solutions to Schrodinger's Eqn?
- jstrunk
- · Replies 3 ·
Undergrad A thought experiment concerning determinism in quantum mechanics
- Spathi
- · Replies 2 ·
Insights Properties and classification of baryon particles
- PeroK
- · Replies 7 ·
Undergrad Interference of signal photons entangled with idlers
- Sonderval
- · Replies 2 ·
Undergrad Virtual Photons: The Long-Distance Repulsion of Electrons
- Green dwarf
- · Replies 2 ·
Undergrad How are good quantum numbers related to perturbation theory?
- mathingenue
- · Replies 18 ·
Undergrad A popular explanation of Bell's inequalities
- Spathi
- · Replies 16 ·
Undergrad Does putting a hydrogen atom in a box mix angular momentum states?
- Twigg
- · Replies 2 ·
High School Is the weak nuclear force attractive or repulsive or both?
- abdossamad2003
- · Replies 18 ·
Undergrad Feynman diagram for photon-photon scattering γ+γ→γ+γ
- ghbeefcake
- · Replies 2 ·
Undergrad How do raising and lowering operators work in quantum mechanics?
- VVS2000
- · Replies 3 ·
Graduate Klein paradox in the massless case
- Paul159
- · Replies 1 ·
Undergrad How does QM explain that we see electrons circulating in a magnetic field?
- Heidi
- · Replies 33 ·
Undergrad Non-relativistic limit of Klein Gordon field
- dRic2
- · Replies 2 ·
Graduate Spontaneous and stimulated emission in Planck's radiation law
- dbabic
- · Replies 5 ·
High School Is matter a particular form of energy?
- CoolMint
- · Replies 7 ·
Undergrad Entanglement, Mixed or Pure State?
- stephen8686
- · Replies 3 ·
Undergrad Reversing a series of polarizers
- kurt101
- · Replies 17 ·
Insights The 7 Basic Rules of Quantum Mechanics
- A. Neumaier
- · Replies 70 ·
Undergrad Cyclic rotation of the cross product involving derivation
- Garlic
- · Replies 12 ·
High School What is actually spinning in quantum spin?
- Stevexyz
- · Replies 22 ·
Undergrad A Question on Spinors in a High school textbook
- Falgun
- · Replies 3 ·
Undergrad Does gravity exist at the quantum level if it's caused by time dilation?
- curiouschuck
- · Replies 10 ·
High School Is the highest frequency possible the inverse of Planck time?
- brajesh
- · Replies 2 ·
Graduate Mixed versus Pure Quantum States for the Singlet
- knowwhatyoudontknow
- · Replies 16 ·
Graduate Complete characterization of local monomials
- Gaussian97
- · Replies 0 ·
Undergrad Macroscopic quantum entanglement?
- Sciencelad2798
- · Replies 12 ·
Graduate Active and Passive Transformations Confusion
- ThereIam
- · Replies 8 ·
High School Two questions about Black body radiation
- vijayantv
- · Replies 12 ·
Undergrad Physical proof of a simulation?
- Sciencelad2798
- · Replies 5 ·
Undergrad Quantum Spin - If It’s Not Spinning, What Is It Doing?
- BadgerBadger92
- · Replies 12 ·
Undergrad Notation of the approximation in quantum phase estimation algorithm
- Peter_Newman
- · Replies 1 ·
High School Q - Double slit experiment, delayed slit selection observation
- Matt711
- · Replies 5 ·
Graduate Orthogonality of variations in Faddev-Popov method for path integral
- Wizard
- · Replies 1 ·
Graduate Weyl Fermion in an infinite well
- Paul159
- · Replies 1 ·
Undergrad Significance of double slit experiment?
- LightningInAJar
- · Replies 5 ·
Graduate Does quantizing metric fields mean quantum gravity?
- Haorong Wu
- · Replies 7 ·
Undergrad Derivation of Schrodinger equation (chicken and egg problem?)
- Hamiltonian
- · Replies 17 ·
Undergrad How indistinguishable are photons?
- Killtech
- · Replies 32 ·
Undergrad Can a static EM field consist of photons?
- fxdung
- · Replies 14 ·
Undergrad Interferences (with diagonal density matrix)
- Heidi
- · Replies 11 ·