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 How gravity affects wave function collapse
- EvilDonut
- · Replies 22 ·
Undergrad Does Adding Detector D5 After BSa Affect the Interference Pattern at D0?
- or4cle
- · Replies 1 ·
High School The Lightness of Being: Frank Wilczek's Lay Book
- bhobba
- · Replies 1 ·
High School What is the connection between unitarity and thermodynamics?
- Collin237
- · Replies 7 ·
Undergrad Can subspaces be used to determine probabilities in quantum mechanics?
- friend
- · Replies 1 ·
Undergrad Particles from a thermal source
- A. Neumaier
- · Replies 81 ·
Undergrad Are axioms 2 and 3 of quantum mechanics incompatible?
- Zafa Pi
- · Replies 20 ·
Undergrad How do Alice and Bob securely compare detector choices in QKD?
- Madi Araly
- · Replies 2 ·
High School Quantum Interactions happen where?
- tionis
- · Replies 2 ·
Undergrad Are virtual particles real or mathematical constructs?
- J-eastwood
- · Replies 81 ·
Graduate Is non-locality a necessary consequence of the Bell theorem?
- Igael
- · Replies 17 ·
High School Applying Bell's inequality to photon polarization angles
- dbertels
- · Replies 10 ·
Graduate How does negative chemical potential influence fugacity in an Ideal Bose Gas?
- erbilsilik
- · Replies 6 ·
Undergrad Difference between atomic behavior in QM and classical physics
- durant35
- · Replies 1 ·
Undergrad Spin Offsetting Charge: How Electrons Balance Out
- Cobalt101
- · Replies 2 ·
Undergrad Infinite Sq. Well sinusoidal gen. soln question
- Zacarias Nason
- · Replies 8 ·
High School Connecting Bell's inequality to polarization experiments
- dbertels
- · Replies 15 ·
Undergrad Are physical constants subject to the uncertainty principle?
- Happiness
- · Replies 10 ·
Graduate Is measurement a yes/no process?
- naima
- · Replies 14 ·
Undergrad Finite vs. Infinite Square Well potential base question
- Zacarias Nason
- · Replies 1 ·
High School Decoherence and the Dust Particle
- Feeble Wonk
- · Replies 74 ·
High School What is the Hamiltonian operator for a decaying Carbon-14 atom?
- Joshua L
- · Replies 5 ·
Undergrad Delta fuction potential general solution
- Danny Boy
- · Replies 5 ·
Undergrad Why can state vectors be pulled out of integrals in Dirac notation?
- KastorPhys
- · Replies 4 ·
High School How Does the Double Slit Experiment Show Both Particle and Wave Behaviors?
- dawningparadox
- · Replies 8 ·
Undergrad How exactly does squaring operators (e.g. <p^2> work?
- Zacarias Nason
- · Replies 5 ·
Graduate Can decoherence be formulated in the Heisenberg picture?
- atyy
- · Replies 38 ·
Graduate How to change density of states to eV
- lioric
- · Replies 4 ·
Graduate Quantum non-locality and vacuum polarization
- mbond
- · Replies 4 ·
Graduate Is the direction of spin changed by measurement?
- Jilang
- · Replies 15 ·
Graduate Photon anti-bunching as necessary for BS entanglement
- sciencejournalist00
- · Replies 11 ·
Graduate Relativistic standing wave electrons?
- Garlic
- · Replies 2 ·
Insights Struggles with the Continuum - Part 6 - Comments
- john baez
- · Replies 24 ·
Graduate Lorentz transformations and vector fields
- Giuseppe Lacagnina
- · Replies 1 ·
Graduate What's a firm/good definition of an "attractive" potential?
- Zacarias Nason
- · Replies 2 ·
Graduate How can the Higgs boson have mass?
- Natskyge
- · Replies 7 ·
Graduate Spin wave function of a system of 2 electrons
- Happiness
- · Replies 21 ·
Graduate Is BI really required to validate the Hidden Variables?
- Adel Makram
- · Replies 17 ·
Graduate Is the differential in the momentum operator commutative?
- Zacarias Nason
- · Replies 5 ·
Graduate Can very distant particles be entangled?
- naima
- · Replies 27 ·
Graduate Are Electron Orbitals Always Spherical in Shape?
- Happiness
- · Replies 7 ·
Graduate Maggiore Book misunderstanding
- kroni
- · Replies 8 ·
Graduate Relativity impacts at quantum level
- Cobalt101
- · Replies 1 ·
Graduate What is Neumaier's interpretation and how does it handle single quantum systems?
- cube137
- · Replies 45 ·
High School Quantum mechanics and reality of matter
- Imran Makhdoom
- · Replies 8 ·
Graduate Electric Field Effect on Quantum Well
- kpsr
- · Replies 2 ·
Graduate What additional events must happen to produce entanglement
- sciencejournalist00
- · Replies 19 ·
Undergrad Why do we need Quantum Mechanics so much?
- fxdung
- · Replies 6 ·
Graduate Superpositions and strong force
- Billmyk
- · Replies 1 ·
Graduate Trying to understand Selection Rules in Cohen-Tannoudji
- kq6up
- · Replies 4 ·
Graduate Euclidean correlators for finite chemical potential
- Einj
- · Replies 5 ·
Graduate Do we really mean Hermitian conjugate here?
- ShayanJ
- · Replies 8 ·
Graduate Stern-Gerlach experiment as a measurement
- ShayanJ
- · Replies 14 ·
How does the formula C-6 come about in the following image?
- weezy
- · Replies 5 ·
Graduate Are All Solutions of the 1D Schrodinger Equation Energy Eigenstates?
- Zacarias Nason
- · Replies 17 ·
Graduate Clebsch-Gordan coefficients symmetry relation
- Happiness
- · Replies 3 ·
Graduate Converting operator matrix (Quantum Chemistry question)
- HAYAO
- · Replies 2 ·
Graduate Trace of n-times created state versus single creation
- naima
- · Replies 7 ·
Graduate Quantum medicine research and physicist priorities
- curiousman
- · Replies 4 ·
Graduate Is Matter Created continuously?
- ajay.05
- · Replies 11 ·
Graduate Harmonic oscillator positive position expectation value?
- guitarphysics
- · Replies 2 ·
Graduate Entanglement and time dilation
- goran d
- · Replies 3 ·
Graduate Can someone give me a hand with large root here
- lioric
- · Replies 7 ·
Graduate Do you believe what this physics teacher says about entanglement
- sciencejournalist00
- · Replies 13 ·
Graduate Do you believe that entanglement drives the arrow of time?
- sciencejournalist00
- · Replies 9 ·
Graduate Why this macro thing having quantum behaving but other not?
- fxdung
- · Replies 10 ·
Graduate Stat. States, Orthonorm. expansion coefficients etc qn?
- Zacarias Nason
- · Replies 5 ·
Graduate How does superposing momentum states with e^-ikx create a position state?
- TimeRip496
- · Replies 1 ·
Graduate How Do Photons Influence Our Vision Through Quantum Wave Properties?
- durant35
- · Replies 13 ·
Graduate What makes energy eigenstates localized in the spectrum?
- Zacarias Nason
- · Replies 3 ·
Graduate Bending of Light in diffraction? Is it actually possible?
- Aurghyadip Kundu
- · Replies 5 ·
Graduate Would reversing particle momenta reform a broken egg quantum mechanically?
- eloheim
- · Replies 12 ·
Graduate Kinetic energy of two particles
- Dexter Neutron
- · Replies 5 ·
Undergrad Quantum mechanics is not weird, unless presented as such
- A. Neumaier
- · Replies 544 ·
Graduate Why helicity of photon is 1 but not 3?
- fxdung
- · Replies 37 ·
Undergrad What does Double slit experiment actually mean
- Sophia
- · Replies 14 ·
Graduate What's the difference between these two equations?
- baouba
- · Replies 1 ·
Graduate Is there any reason i is left in the denominator here?
- Zacarias Nason
- · Replies 2 ·
Graduate Decoherence and apparent collapse
- durant35
- · Replies 53 ·
Graduate Are tracks in collision experiments proof of particles?
- A. Neumaier
- · Replies 85 ·
Graduate Spectral Gap or Gapless Undecidable
- .Scott
- · Replies 62 ·
Graduate Can All Particles of a Cat Be in Superposition Simultaneously?
- durant35
- · Replies 60 ·
Graduate Why is Decoherence Needed in Quantum Mechanics?
- zonde
- · Replies 82 ·
RIP Prof Rudolf Haag (5 Jan 2016)
- strangerep
- · Replies 5 ·
Graduate What's the name of the wavefxn int. showing normalizability?
- Zacarias Nason
- · Replies 2 ·
Graduate Hamiltonian and momentum operator acting on a momentum eigenstate
- amjad-sh
- · Replies 11 ·
Graduate Weinberg Lectures on QM (2013 ed.), Equation 3.6.18
- jouvelot
- · Replies 6 ·
Graduate Why Is radiation the highest form of entropy?
- memento
- · Replies 25 ·
Graduate Relativistic vs. Nonrelativistic KE Operator question
- Zacarias Nason
- · Replies 3 ·
Graduate Measurement and Preparation in the Double Slit Experiment
- naima
- · Replies 32 ·
Graduate Spin imparting angular momentum
- Ashphysics
- · Replies 12 ·
Graduate Vectors, Hilbert Spaces, and Tensor Products
- Bashyboy
- · Replies 4 ·
Graduate Now that all loopholes are closed
- Collin237
- · Replies 10 ·
Graduate Exponential of Pauli spin matrices
- Happiness
- · Replies 1 ·
Graduate Problem in basic equalities for Huckel energy
- georg gill
- · Replies 1 ·
Graduate Why are Diagonal Elements of a Time-Dependent Perturbed Hamiltonian Often Zero?
- Morten
- · Replies 2 ·
Graduate Advanced quantum mechanics book with solutions
- omidaut
- · Replies 6 ·
Insights Struggles With The Continuum - Part 2 - Comments
- john baez
- · Replies 39 ·
Graduate Quantum state vector and physical state
- DrClaude
- · Replies 3 ·
Graduate Existence of Space: Does it Exist at Planck Level?
- Anya
- · Replies 2 ·