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 Equivalence of entanglement and decoherence?
- entropy1
- · Replies 23 ·
Undergrad Energy levels generally invariant under fixed V, changing T
- bananabandana
- · Replies 1 ·
Undergrad How do you derive Slater determinant from creation operator?
- Amentia
- · Replies 2 ·
Undergrad Could Planck have used different energy-frequency relation?
- pero2912
- · Replies 2 ·
Undergrad Does Relativity and Quantum Mechanics NEED to be reconcile?
- Flatland
- · Replies 14 ·
Undergrad Eigenvalue Problem: What Is It?
- Hamza Abbasi
- · Replies 6 ·
Graduate What is the best Quantum Model to solve many body problems?
- jonjacson
- · Replies 7 ·
Undergrad Expectation value in terms of density matrix
- entropy1
- · Replies 1 ·
High School Order of observations in Bell experiments
- Android Neox
- · Replies 2 ·
Undergrad What does the act of observing do exactly?
- benorin
- · Replies 44 ·
Graduate Using quantum-secured communication for data transfering
- wonderingfidielity
- · Replies 2 ·
High School What is the relationship between the Planck length and black holes?
- edguy99
- · Replies 9 ·
Graduate Heisenberg ferromagnet -- Spontaneous symmetry breaking
- LagrangeEuler
- · Replies 11 ·
Undergrad Understanding commutator relations
- TheCanadian
- · Replies 5 ·
Undergrad Why Can't We Fix the Gauge in the Magnetic Aharonov-Bohm Effect?
- LarryS
- · Replies 7 ·
Undergrad What is the size of neutrons in a neutron star?
- Cato
- · Replies 3 ·
Undergrad Proof of unitarity of time evolution in Susskind's book
- entropy1
- · Replies 26 ·
Graduate Deutsch–Jozsa algorithm/Circuit Analysis
- bapgobears
- · Replies 4 ·
Undergrad Lagrangian and Feynman diagrams
- Neutrinos02
- · Replies 3 ·
High School Time reversibility in quantum mechanics
- Justice Hunter
- · Replies 1 ·
High School Position of a harmonic oscillator
- A. Neumaier
- · Replies 20 ·
Graduate Methods for finding properties of quantum dots?
- ElizabethMaybe
- · Replies 3 ·
Undergrad QM - Ladder Operator QHO - factorization
- JaneHall89
- · Replies 1 ·
Graduate Electron shell further away from nucleus higher Energy lvl?
- Boomzxc
- · Replies 4 ·
High School Which component of light is a photon?
- LSMOG
- · Replies 7 ·
Undergrad Can a Photon be Absorbed Without the Exact Energy Level?
- NaiveTay
- · Replies 36 ·
Undergrad Confused about the B-C-H equation
- dyn
- · Replies 10 ·
Undergrad Can diffraction be explained by quantisation?
- Jilang
- · Replies 30 ·
Graduate Phase factors and Modulus Square?
- kq6up
- · Replies 6 ·
High School Two-Slit Experiment And Varying Electron Momentum
- NaiveTay
- · Replies 3 ·
Graduate Collapse and projection-valued measures
- burakumin
- · Replies 4 ·
Undergrad Schrödinger equation and interaction Hamiltonian
- TheCanadian
- · Replies 8 ·
Graduate Forbidden Transitions in the He-Ne Laser?
- kq6up
- · Replies 12 ·
Undergrad Properties of Photons: Orange vs. Green
- Jeff Root
- · Replies 16 ·
High School Entanglement, correlation and randomness
- entropy1
- · Replies 18 ·
Graduate Interaction Hamiltonian coupling question
- td21
- · Replies 1 ·
Undergrad Why does a sum of operators act on the state like this?
- Harry Smith
- · Replies 6 ·
Undergrad Is this Quantum non-locality set-up right?
- RockyMarciano
- · Replies 20 ·
Undergrad Is Schrodinger's Cat Experiment Possible with Young's Slits and a Switch?
- wywong
- · Replies 8 ·
Undergrad The speed of light in a medium and path integrals
- Seanra
- · Replies 1 ·
Undergrad Do operators that commute also indicate if their powers commute?
- TheCanadian
- · Replies 11 ·
Undergrad Birgit Dopfer interference experiment
- Dadface
- · Replies 5 ·
Undergrad QM objects do not have properties until measured?
- N88
- · Replies 138 ·
Undergrad Another energy eigenvalue question
- Isaac0427
- · Replies 13 ·
Undergrad What Causes a Measurement to Change the State of a System in Quantum Mechanics?
- Kara386
- · Replies 1 ·
Undergrad Quantum entanglement and parallel displacement
- Adel Makram
- · Replies 34 ·
High School Free Intro-Level Tunneling Simulator - Download Now!
- houlahound
- · Replies 1 ·
Undergrad How are Mixed State Ammonia Molecules Separated by an E-Field?
- kq6up
- · Replies 8 ·
Graduate What is the correct reply on Einstein`s thought experiment?
- Adel Makram
- · Replies 14 ·
Undergrad Understanding Quantum Numbers and Symmetry Algebra for Keplerian Motion
- gerald V
- · Replies 2 ·
Undergrad 1 pm de Broglie wavelength? What's pm?
- alv
- · Replies 1 ·
Graduate Asymptotic momentum eigenstates in scattering experiments
- spaghetti3451
- · Replies 6 ·
Graduate Understanding the Uniform Probability Distribution in Statistical Ensembles
- bananabandana
- · Replies 231 ·
High School Is QM an Intrinsic Physical Theory?
- Einstein's Cat
- · Replies 2 ·
Undergrad Does violation of Bell's Inequality imply a preferred frame
- Jimster41
- · Replies 21 ·
Graduate Proof of Lorentz invariance of Klein-Gordon equation
- spaghetti3451
- · Replies 4 ·
Graduate Calculation of S-matrix elements in quantum field theory
- spaghetti3451
- · Replies 1 ·
High School IBM’s new five-qubit universal quantum computer
- Spinnor
- · Replies 6 ·
Graduate Basic strong Zeeman effect question
- vaart
- · Replies 4 ·
Undergrad Solving for SHM Diatomic Energy Levels
- James Brady
- · Replies 2 ·
Graduate Crystal field when inversion is absent
- ftft
- · Replies 4 ·
Undergrad Why don't we use the Schrodinger Uncertainty Principle?
- Joker93
- · Replies 19 ·
Undergrad Possible measurements of z-component of angular momentum
- Fosheimdet
- · Replies 2 ·
Undergrad Can a clock inside a box solve the mystery of Schroedinger's Cat?
- student34
- · Replies 21 ·
Undergrad Wilsonian viewpoint and wave function reality
- atyy
- · Replies 141 ·
Undergrad Second quantization and creation/annih. operators
- Swamp Thing
- · Replies 3 ·
High School Quantum Model of Contact Forces
- greswd
- · Replies 25 ·
Undergrad Question about Uncertainty Principle
- Joker93
- · Replies 9 ·
Undergrad Some questions regarding quantum fluctuations
- momo666
- · Replies 4 ·
Undergrad What is the Quantum Circuit Simulator?
- Strilanc
- · Replies 7 ·
Graduate Hamiltonian of the quantised Klein-Gordon theory
- spaghetti3451
- · Replies 2 ·
Undergrad Energy conservation and information conservation
- Rocha
- · Replies 6 ·
Undergrad What does simplicial mean in the context of QM?
- Jilang
- · Replies 7 ·
High School Ψ=f(r)exp[-i(Et-pz+Φ/2)] a Q.M. wave function?
- Spinnor
- · Replies 7 ·
Undergrad Is there a difference between EM waves and photon wavefunctions?
- sciencejournalist00
- · Replies 51 ·
Undergrad Schrödinger Potential Fields with no Energy Quantisation?
- greswd
- · Replies 35 ·
Undergrad Relationship between E-field and Probability Amplitude of Waves
- tade
- · Replies 8 ·
High School Measuring photon momentum without annihilating it
- Swamp Thing
- · Replies 3 ·
Undergrad 2 particles created around event horizon: out or inside?
- nomadreid
- · Replies 5 ·
Undergrad Can you have a high temperature with very little heat?
- MaxKang
- · Replies 3 ·
Undergrad Do wavefunctions have to be in the form of \(Ae^{ikx}\)?
- Isaac0427
- · Replies 10 ·
Undergrad What is the complex conjugate of the momentum operator?
- Joker93
- · Replies 25 ·
High School Black Holes, Information Loss and Causality Query
- ricardo81
- · Replies 10 ·
Undergrad Does this wavefunction make sense?
- Isaac0427
- · Replies 2 ·
Undergrad Free particle in a central potential
- amjad-sh
- · Replies 2 ·
Undergrad Why can’t force-carrying particle (spin 0, 1, 2) be detected
- Demian
- · Replies 2 ·
Undergrad Pseudorandom Entanglement and Special Relativity
- greswd
- · Replies 61 ·
Graduate Quantum challenge: mathematical paradoxes
- micromass
- · Replies 19 ·
Undergrad What was Niels Bohr's rebuke to Schrödinger's Cat?
- tade
- · Replies 17 ·
Undergrad Understanding Bloch's Theorem: Does 'n' Label Energy Bands?
- aaaa202
- · Replies 3 ·
Graduate Time-ordering fermion operators
- Coriolis1
- · Replies 1 ·
High School Is classical mechanics philosophically sound?
- A. Neumaier
- · Replies 3 ·
High School Superposition of measurement apparatus
- entropy1
- · Replies 11 ·
Graduate Treatment of singlets in the Hubbard model
- supernano
- · Replies 1 ·
Undergrad Down convertor 2 photon entanglement - explanation?
- marcophys
- · Replies 3 ·
Undergrad What is the physical significance of <x'|x> in quantum mechanics?
- friend
- · Replies 124 ·
Undergrad Temperature in quantum systems
- lfqm
- · Replies 8 ·
Undergrad The postulate of Quantum Mechanics and Eigenvalue equation
- betelgeuse91
- · Replies 5 ·
High School Multi or single quantum state?
- fxdung
- · Replies 7 ·
Undergrad Momentum operator on positon/momentum representation
- dyn
- · Replies 9 ·