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 Canonically conjugate operators
- ShayanJ
- · Replies 5 ·
Graduate Gauge invariance of stress-energy tensor for EM field
- Trave11er
- · Replies 8 ·
Graduate Energy E in total per level, or per state in level?
- ZedCar
- · Replies 2 ·
Undergrad Difference between photon frequency and the light frequency?
- marksesl
- · Replies 8 ·
Graduate The uncertainty principle and electric field strength
- snoopies622
- · Replies 4 ·
Undergrad Smallest measurable length and time with current technology
- y33t
- · Replies 2 ·
Graduate Information Theory on Wave Function Collapse
- Time_
- · Replies 3 ·
Graduate Proton electric dipole moment?
- MarkoniF
- · Replies 11 ·
Graduate Particle in superposition of energy eigenstates and conservation of energy.
- amirhdrz
- · Replies 31 ·
Undergrad How do electrons know when they're being observed in the double-slit experiment?
- DeepSpace9
- · Replies 9 ·
High School The Double Slit Experiment Blows My Mind
- JtValentine
- · Replies 7 ·
Graduate Matter as Excitation of Fields: Model or Reality?
- Islam Hassan
- · Replies 3 ·
Graduate Why is the Wave Function Central to Quantum Theory's Physical Interpretation?
- aaaa202
- · Replies 51 ·
Graduate Create Feynman Diagrams online
- magicfountain
- · Replies 2 ·
Graduate Do Lorentz boosts affect spin orientation?
- Zoot
- · Replies 5 ·
Undergrad About the hyperfine energy splitting of a positronium
- S_klogW
- · Replies 1 ·
Graduate Do creation and annihilation operators destroy particles in carbon atoms?
- I2004
- · Replies 22 ·
Graduate Uncertainty in some observable A
- CAF123
- · Replies 8 ·
Graduate The quantum state cannot be interpreted statistically?
- inflector
- · Replies 521 ·
Graduate Normalization of step potential eigenfunction
- tamaghnahazra
- · Replies 13 ·
Graduate Spin direction and 4-spinor components
- Zoot
- · Replies 1 ·
Graduate Does the Schrödinger equation neglect the uncertainty principle?
- Mr-T
- · Replies 11 ·
Graduate Why doesn't quantum superposition apply to macroscopic objects?
- Oral B
- · Replies 12 ·
Graduate Confusion from Weinberg's QFT vol1
- cosmic dust
- · Replies 10 ·
Graduate Expectation values for a Gaussian wave packet using position and momentum operators
- cragar
- · Replies 5 ·
Graduate Question re the Information Paradox
- Islam Hassan
- · Replies 4 ·
Graduate Why most observables have real eigenvalues
- aaaa202
- · Replies 9 ·
Graduate Quantum Harmonic Oscillator - Why we limit the bottom end of the ladder
- rajark
- · Replies 7 ·
Graduate Hamiltonian for hydrogen atom?
- cragar
- · Replies 11 ·
Graduate Gross-Pitaevskii equation in Bose Einstein condensates
- alexvas
- · Replies 2 ·
Graduate Quantum Key Distribution confusion.
- Silversonic
- · Replies 1 ·
Graduate How often do quanta annihilate in interacting fields?
- I2004
- · Replies 10 ·
Graduate Analytic continuation to find scattering bound states
- alexvas
- · Replies 2 ·
Graduate Hamiltonian Kinetic Energy Operator
- DiracPool
- · Replies 1 ·
Graduate Does the Observer Affect the Superposition of Quantum Particles?
- QGary
- · Replies 8 ·
Graduate How Does Quantum Entanglement Work?
- Aeropath
- · Replies 17 ·
Graduate How do you know when a set of observables form a CSCO?
- estiface
- · Replies 1 ·
Graduate Odd and even solutions to the SE
- aaaa202
- · Replies 14 ·
Graduate Is the Lowest Possible Spin of Particle p 2 in Decay Scenarios?
- MarkovMarakov
- · Replies 1 ·
Graduate Complex coefficents in density operator expansion?
- center o bass
- · Replies 1 ·
Graduate Does it matter which eigenvectors
- aaaa202
- · Replies 5 ·
Graduate Particle in a box and Heisenberg Uncertainty principle paradox?
- Boorglar
- · Replies 3 ·
Graduate Where do external photon terms go in Feynman diagram term ordering?
- spacelike
- · Replies 2 ·
Graduate Lagrangian vs. Hamiltonian in QFT
- copernicus1
- · Replies 3 ·
Graduate Can particles be entangled on any property having more than two states?
- San K
- · Replies 4 ·
Graduate Why the Antisymmetry of Wavefunction for l = 1?
- c299792458
- · Replies 1 ·
Graduate Are Protons and Nuclei Transitioning Between Spin States in NMR and MRI?
- bladesong
- · Replies 2 ·
Graduate Hey guys,I have to admit that my knowledge of this stuff is
- PhiPhenomenon
- · Replies 3 ·
Graduate The universe from the point of vew of a photon ?
- laudas
- · Replies 6 ·
Graduate Negative energy in the Schrödinger equation
- aaaa202
- · Replies 7 ·
Graduate What Causes the Attraction Between Charged Particles?
- ParticleBane
- · Replies 30 ·
Graduate Quantum Computing and the Infinite Salesmen Problem
- Mukilab
- · Replies 30 ·
Graduate Expectation value of a†a in number eigenstates
- jhosamelly
- · Replies 2 ·
Graduate Fair Sampling Loophole now closed for Photons
- DrChinese
- · Replies 21 ·
Graduate Why sum creation operators with i≠p in fermionic second quantization
- jhosamelly
- · Replies 6 ·
High School Is it true that you are never actually touching something?
- physicsnoob12
- · Replies 67 ·
Graduate Bosonic condensation in 1 spatial dimension
- JK423
- · Replies 5 ·
Graduate Quantum-Classical limit of Zonal Harmonics
- "pi"mp
- · Replies 2 ·
Graduate QM: Understanding Quantization Axis for 2-Level Atoms
- Niles
- · Replies 1 ·
Undergrad What is the g-factor and how do you solve for it?
- JJHK
- · Replies 4 ·
Graduate Lagrangian density for a complex scalar field (classical)
- Trave11er
- · Replies 4 ·
Graduate Can Perfect White Light Consist of Only Out-of-Phase Photons Resulting in Black?
- Edi
- · Replies 2 ·
Undergrad Is an electron wave an electromagnetic or mechanical wave?
- einstein1921
- · Replies 7 ·
Graduate Identity Operator: Vector Expressions in Basis A
- aaaa202
- · Replies 3 ·
Graduate How does abstract algebra relate to canonically conjugate in physics?
- nateHI
- · Replies 1 ·
Graduate Does the decay clock reset with each measurement in the quantum Zeno effect?
- daisey
- · Replies 8 ·
Undergrad Protons and neutrons the same mass?
- Sarask
- · Replies 2 ·
Graduate 3-Qubit Quantum Circuit with 1 CNOT
- jumi
- · Replies 1 ·
Graduate Dream of a quantum machine that records and distributes data
- Heilsin
- · Replies 6 ·
Graduate Splitting light into colors, mathematical expression (fourier transforms)
- FordDJ22
- · Replies 4 ·
Graduate Deriving the energy-time uncertainty relation from position-momentum
- harjyot
- · Replies 1 ·
Graduate Why are free particle solutions non-normalizable and continuous?
- aaaa202
- · Replies 6 ·
Undergrad What is the evidence for light being particles instead of waves?
- CLourensS
- · Replies 33 ·
Graduate Why is the energy expectation value independent of time?
- cragar
- · Replies 3 ·
Graduate Why does energy separation determine oscillation speed in superposition states?
- einstein1921
- · Replies 3 ·
Graduate Why not formulate QM in terms of |ψ| squared?
- Tosh5457
- · Replies 30 ·
Graduate Three Papers on the Foundations of Evolution and Emergence by Diederik Aerts
- John86
- · Replies 1 ·
Graduate Why do entangled particles have to be in an indeterminate state?
- San K
- · Replies 5 ·
Graduate Klein-Gordon Green's function and its physical meaning
- Sekonda
- · Replies 1 ·
Graduate Entanglement and the Pauli exclusion principle
- lotm
- · Replies 2 ·
Graduate Is Entropy Reduced When Particles Combine?
- LarryS
- · Replies 6 ·
Graduate Does the energy-time uncertainty principle violate energy conservation?
- dev70
- · Replies 1 ·
Graduate Physical meaning of Differential Cross Section in scattering
- Fizicks1
- · Replies 2 ·
Graduate Loophole-free demonstration of nonlocality?
- bohm2
- · Replies 36 ·
Graduate The Role of Commutators and Poisson Brackets in Phase Space Geometry
- aaaa202
- · Replies 3 ·
Graduate Why Do I Struggle to Understand Complex Physics Concepts?
- jim77
- · Replies 5 ·
Graduate The expectation value in quantum theory
- aaaa202
- · Replies 2 ·
Graduate Solving Doubled Spring Constant in Harmonic Oscillator
- aaaa202
- · Replies 9 ·
High School Why the central fringe is brighter in the double slit experiment
- jaumzaum
- · Replies 4 ·
Graduate What is the significance of macro entanglement in quantum mechanics?
- benjayk
- · Replies 7 ·
Graduate Combined system state as product of states
- Sekonda
- · Replies 7 ·
Graduate Why photon loss energy when escape from a black hole ?
- big_bounce
- · Replies 2 ·
Graduate Bohr's response to the Einstein box
- Loro
- · Replies 8 ·
Graduate Orgin of charge and magnetic character
- dev70
- · Replies 1 ·
Graduate When does hf equal kT?
- phyky
- · Replies 3 ·
Graduate What Are the Degrees of Freedom for an Electron?
- dev70
- · Replies 20 ·
Graduate Degeneracy for different energy states in Infinite cubic well
- Chelsea S
- · Replies 9 ·
Graduate Finding the ground state energy of a particle
- sandybeach
- · Replies 3 ·
Graduate One loop integration evaluation
- Sekonda
- · Replies 12 ·
Graduate Topological cross section vs differential cross section
- cfar
- · Replies 8 ·