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 Artificial atoms used to improve compact discs?
- underworld
- · Replies 5 ·
Graduate In QM operators, why [YPz,YPx]=0, [ZPy,ZPy]=0 [X,Py]=0 [Y,Pz]=0, etc
- mudyos
- · Replies 10 ·
Graduate Time-dep perturbation theory
- omyojj
- · Replies 1 ·
Graduate How to work in the momentum representation?
- pellman
- · Replies 6 ·
Graduate Testing Hermiticity: How to Prove it?
- Lorna
- · Replies 2 ·
Graduate How do virtual photons mediate electromagnetic forces?
- kcodon
- · Replies 26 ·
Graduate Quantum physics with Green's functions
- Tanja
- · Replies 3 ·
Graduate Can a Quantum State Have Time-Dependent Eigenvalues?
- pellman
- · Replies 1 ·
Graduate System of hydrogen atoms in an electric field
- Reid
- · Replies 1 ·
Graduate Why are particles in quantum field theory discrete?
- pellman
- · Replies 24 ·
Graduate Why does spin 0 have to be a true scalar?
- pellman
- · Replies 28 ·
Graduate Can four-photon entanglement be a pure state like |HHH⟩ + |VVV⟩?
- DrChinese
- · Replies 16 ·
Graduate Does the Four Fermion Interaction Conserve Current Like Standard Models?
- quantumfireball
- · Replies 1 ·
Graduate Proving the Spin Half Nature of Dirac Quanta
- quantumfireball
- · Replies 7 ·
Graduate What is Quantum Physics and How Does it Differ from Classical Physics?
- Lavace
- · Replies 12 ·
Graduate Can Quantum Mechanics Allow for Discontinuous Wavefunctions and Probabilities?
- Loren Booda
- · Replies 4 ·
Graduate Non-Commutative Angular Momentum, and Muonium
- YouWish
- · Replies 1 ·
Graduate A crank's idea about Uncertainty Principle
- neelakash
- · Replies 27 ·
Graduate Probability Amplitude phases
- Frankww
- · Replies 3 ·
Graduate How can a single-frequency photon be a wave packet?
- wawens
- · Replies 7 ·
Graduate Nonlocality of a single particle without objections
- Ivan Seeking
- · Replies 6 ·
Graduate Intiutive approach to Green's function for SE
- gulsen
- · Replies 1 ·
Graduate Entanglement: Can We Logically Say a Body is in All Possible States?
- Impulse2
- · Replies 4 ·
Undergrad Multiple lines in H2 and Hg emission spectra
- hagopbul
- · Replies 1 ·
Graduate Hilbert/Fock space spanned by non-interacting states
- smallphi
- · Replies 13 ·
Graduate What exactly constitutes a gauge transformation?
- captain
- · Replies 3 ·
Graduate A contradiction of Heisenberg uncertainty principle?
- AlbertEinstein
- · Replies 29 ·
Graduate So, the question is: Can hidden variables explain quantum behaviour?
- Enzoblue
- · Replies 3 ·
Graduate Double slit variations: geometry, material, temperature, and neutral particles
- PopcornKing
- · Replies 2 ·
Graduate Spectral line width calculations
- Mjolnir
- · Replies 3 ·
Graduate Why are eigenstates important in the treatment of atomic systems?
- Artaxerxes
- · Replies 4 ·
Graduate Does closing one slit in the double slit experiment trigger Heisenberg uncertainty?
- Dropout
- · Replies 4 ·
Graduate Two particles in superposition
- freerangequark
- · Replies 6 ·
Undergrad Difference between flux and fluence
- kolawole Bayowa
- · Replies 1 ·
Can Consciousness and the Unified Field Be Experienced Beyond the Human Body?
- Hubbart24
- · Replies 1 ·
Graduate Can q Have Eigenvectors Other Than Zero in Standard Quantization Procedure?
- kvl
- · Replies 10 ·
Graduate Need a quick tutorial on the following topics
- bochain
- · Replies 5 ·
Graduate Deducing Degeneracy in Spin from Commutation Relations
- Manchot
- · Replies 2 ·
Graduate Does Absolute Zero Occur in the Universe?
- dobroplayer
- · Replies 13 ·
Graduate The Dirac Equation and the Neutrinos
- Magister
- · Replies 8 ·
Graduate Quantum Spin Chain Problem: An Overview
- genloz
- · Replies 4 ·
Graduate Fourier Transform of Hermitian Operators
- BeauGeste
- · Replies 4 ·
Graduate How Do I Derive the Zeta Function Using Zeta Function Regularization?
- robousy
- · Replies 5 ·
Graduate Understanding Non-Relativistic Path Integral Formulation
- CPL.Luke
- · Replies 5 ·
Undergrad Light through polarizing filters
- clinchem
- · Replies 8 ·
Graduate Is the physical whole a sum of quantum measurements?
- Loren Booda
- · Replies 1 ·
Graduate How Do Electrons, EM Waves, and Electricity Interact?
- caybo
- · Replies 7 ·
Graduate Why does the delta function well bind the particle when its energy is higher?
- Poop-Loops
- · Replies 7 ·
Graduate Can operators describe a single or many measurements simultaneously?
- cscott
- · Replies 1 ·
Graduate Communication using quantum entanglement
- phsopher
- · Replies 5 ·
Graduate What assumptions go into the 3D wave equation?
- pardesi
- · Replies 2 ·
Undergrad How do you visualize the transpose and adjoint of a Hermitian matrix?
- nolanp2
- · Replies 11 ·
Graduate How can the momentum be non-zero if the probability current density is zero?
- neelakash
- · Replies 2 ·
Graduate What is the use of representing wavefunctions as an exponential?
- pardesi
- · Replies 7 ·
Graduate Perturbation effect on harmonic osclillator
- fahmed6
- · Replies 6 ·
Graduate COM vs Lab Total energy discrepency
- physmurf
- · Replies 3 ·
Graduate How Does Quantum Theory Explain Repulsion Between Charged Balloons?
- GTrax
- · Replies 19 ·
Graduate Why Does a 2π Rotation Change the Sign of a Wavefunction in Quantum Mechanics?
- neelakash
- · Replies 5 ·
Graduate Calculating Group Velocity of Schrodinger Waves: Dispersion Relation
- Euclid
- · Replies 6 ·
Graduate Does Observing a Particle in Superposition Entangle You With It?
- michael879
- · Replies 65 ·
Graduate Is the collapse of the wavefunction in entangled particles instantaneous?
- skihobbes
- · Replies 2 ·
High School Direction of revolution of atomic electrons
- armaronvinu
- · Replies 1 ·
Undergrad Absorption of photons by electrons
- Davnewil
- · Replies 13 ·
Graduate Understanding Bound States in Quantum Mechanics
- silimay
- · Replies 7 ·
Graduate How Can You Have Negative Energy in a Positive Potential?
- CPL.Luke
- · Replies 5 ·
Graduate Typo in Kapusta or Ashok Das ? Formula for thermal propagator
- Sunset
- · Replies 1 ·
Graduate Euclidean QFT and thermodynamic analogy
- OOO
- · Replies 10 ·
Understanding How to Manage Your Finances
- wdlang
- · Replies 9 ·
Graduate Electromagnetic casimir effect
- robousy
- · Replies 1 ·
Graduate How two quantum systems interact ?
- ronan1
- · Replies 37 ·
Graduate Can QT estimate the ionization energy of neutral Helium, He I?
- Sean Torrebadel
- · Replies 30 ·
Graduate What Does Not Local in Space Mean in Relativistic Quantum Mechanics?
- asub
- · Replies 3 ·
Graduate Parity Operator, Symmetric Potential: Is V=PV?
- fantispug
- · Replies 2 ·
Graduate 'Spookytech'? Technology based on quantum interactions
- sanman
- · Replies 2 ·
Undergrad Do photoelectric electrons come from atomic nuclei?
- Liger20
- · Replies 14 ·
Graduate Transforming a Lorentz Scalar: psi-bar x psi x y_0
- captain
- · Replies 8 ·
Graduate Why doesn't a collapsed wavefunction collapse again in a different basis?
- sridhar
- · Replies 17 ·
Graduate Quick QM: Why Does Schrodinger Eq Being 1st Order Matter?
- Thrice
- · Replies 5 ·
Graduate Pψ=aψ and wave function uniqueness
- mengsk
- · Replies 5 ·
Graduate Orthonormal basis and operators
- friend
- · Replies 15 ·
Graduate Is wavefunction collapse an axiom or can it be derived?
- lalbatros
- · Replies 32 ·
Graduate Usefulness of Heisenberg picture?
- Manchot
- · Replies 11 ·
Graduate How does Helium-4 exhibit bosonic properties despite being composed of fermions?
- Iamu
- · Replies 6 ·
Graduate Angular Momentum Ladder Operators
- masudr
- · Replies 2 ·
Graduate Photon, black hole, Wikipedia quote
- pdxjjb
- · Replies 5 ·
Graduate How can one ensure Lorentz invariance when using an external field in QFT?
- smileii
- · Replies 5 ·
Graduate Are All Particles in Quantum Physics Excitations of Fields Like the Higgs Boson?
- Coin
- · Replies 4 ·
Graduate Can Energy Be Calculated from a Single Point in Full CI Calculations?
- reddorange
- · Replies 4 ·
Graduate How observation leads to wavefunction collapse?
- Mr Virtual
- · Replies 445 ·
Graduate How do bell states transform under a phase gate?
- quantumlooser
- · Replies 7 ·
Graduate Spin Interference: Looking for Thought Experiments with Single Electrons
- msumm
- · Replies 8 ·
Undergrad What Happens to a Particle's Energy When a 1D Box Shrinks?
- msumm
- · Replies 1 ·
Graduate Shor's algorithm giving high probability for period 0
- michael879
- · Replies 1 ·
Graduate Significance of the hamiltonian commuting
- sridhar
- · Replies 1 ·
Graduate Is the Ground State of a System Always Pure?
- Physicist
- · Replies 3 ·
Graduate Why don't entangled idler photons reveal which-path information in double slits?
- bruce2g
- · Replies 29 ·
Undergrad Are Atoms Affected by the Big Bang Theory?
- ShadowWorks
- · Replies 11 ·
Graduate On the helicity of the electrons
- luisgml_2000
- · Replies 1 ·
Graduate Symmetry and conserved probability current for wave functions
- pellman
- · Replies 33 ·
Graduate How are the positions of particles described in QFT?
- vcdfrexzaswq
- · Replies 25 ·