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 How many spots will a rotating Stern-Gerlach apparatus produce?
- Old Person
- · Replies 32 ·
High School Can objects in nature store light information on the quantum level?
- Maximum7
- · Replies 14 ·
Undergrad Your Favorite Feynman Diagram?
- Devin Powell
- · Replies 3 ·
Undergrad Quantum Hall Effect and Hall Voltage
- Salamon
- · Replies 0 ·
Graduate QFT Superposition of Final States
- masteralien
- · Replies 3 ·
Undergrad Subtractive mode intensity interferometry?
- Swamp Thing
- · Replies 0 ·
Undergrad Electron counterpart of pseudothermal light source for quantum experiments
- Swamp Thing
- · Replies 0 ·
High School Electron's movement after getting hit by a photon that bounces at 90 degrees
- swnsy05
- · Replies 4 ·
High School Origins of the no-cloning theorem
- martix
- · Replies 6 ·
Undergrad Feedback on QFT particle definition and measurement problem explanation
- norwegian_hobby_sci
- · Replies 5 ·
Undergrad Are Superposition, the Uncertainty Principle, and Duality the same?
- eow
- · Replies 12 ·
Graduate Vacuum Energy from Correlation Functions
- masteralien
- · Replies 7 ·
Undergrad How Do Quantum Fluctuations Shape Cosmic Structures?
- Leandro Bolonini
- · Replies 2 ·
Undergrad About nature of superposition of states
- HighPhy
- · Replies 124 ·
Undergrad Infinite momentum is impossible, boundary term in integration by parts
- George Keeling
- · Replies 24 ·
Undergrad Is the Black Hole Information Paradox Truly Resolved?
- KleinMoretti
- · Replies 5 ·
Undergrad Artificially discretized quantum states - is it a thing?
- Swamp Thing
- · Replies 1 ·
Undergrad Displacement operation acting on individual quadrature components
- waadles
- · Replies 3 ·
Graduate How Are Rotations on the Bloch Sphere Implemented in Practice?
- kelly0303
- · Replies 1 ·
Undergrad Phonon emission : Discrete event or a process with inner detail?
- Swamp Thing
- · Replies 2 ·
Undergrad "Wave-particle duality" and double-slit experiment
- HighPhy
- · Replies 36 ·
High School Does the observer effect in the double slit experiment require a human eye?
- Quarinteen
- · Replies 60 ·
Undergrad Feynman discussion of electron diffraction
- elou
- · Replies 23 ·
High School Disappearance of interference pattern in double slit
- elou
- · Replies 12 ·
Undergrad Example of SO(2) being not simply connected
- Hill
- · Replies 26 ·
Undergrad Is energy conserved when measuring a quantum system?
- KleinMoretti
- · Replies 12 ·
Undergrad Fundamental representation and adjoint representation
- shinobi20
- · Replies 27 ·
Undergrad Double Check Normalization Condition
- thatboi
- · Replies 1 ·
Graduate Do QFT propagators evolve states like quantum mechanics propagators?
- masteralien
- · Replies 13 ·
Graduate Gravity Measured with Milligram masses
- jedishrfu
- · Replies 3 ·
Graduate Noise in Landau–Zener transition
- kelly0303
- · Replies 0 ·
Graduate Why can't ESR detect short-lived radicals in dynamic systems?
- sha1000
- · Replies 5 ·
Undergrad Number of qubits needed to simulate the universe
- HighPhy
- · Replies 22 ·
Graduate Vector field vs. four scalar fields ("QFT and the SM", Schwartz)
- Hill
- · Replies 10 ·
Graduate Fisher information from likelihood function for quantum circuits
- Johny Boy
- · Replies 0 ·
Undergrad Why do orthogonal polarizers at slits eliminate interference pattern?
- ChadGPT
- · Replies 28 ·
Undergrad Is conservation of energy a local law in Quantum field theory?
- KleinMoretti
- · Replies 18 ·
Undergrad Why is there no single slit interference when one slit is closed in a double slit experiment?
- elou
- · Replies 55 ·
Graduate Does Matter Really Move Like a Wave and Hit Like a Particle?
- elou
- · Replies 4 ·
Undergrad How does a band pass filter increase the time of arrival of photons?
- Daniel Petka
- · Replies 2 ·
Undergrad Is the uncertainty principle applicable to single slit diffraction?
- greypilgrim
- · Replies 2 ·
Graduate How was the symmetry used here? ("QFT and the SM" by Schwartz)
- Hill
- · Replies 5 ·
Undergrad Are vacuum energy and vacuum fluctuations the same thing?
- KleinMoretti
- · Replies 1 ·
Undergrad Can a Third Particle Be Entangled with Two Existing Particles Without Breaking Their Entanglement?
- wnvl2
- · Replies 10 ·
Undergrad Heisenberg Equations of Motion for Electron in EM-field
- thatboi
- · Replies 9 ·
Graduate Derivation of energy-momentum tensor in "QFT and the SM" by Schwartz
- Hill
- · Replies 3 ·
Graduate Derivation of QM limit of QFT in "QFT and the SM" by Schwartz
- Hill
- · Replies 2 ·
Undergrad Speed of information in a medium
- neobaud
- · Replies 38 ·
High School How addition of vectors works if every force is quantized
- danielhaish
- · Replies 20 ·
Graduate What does lambda in nuclear decay mean if it is big?
- Tibetan Blackbird
- · Replies 3 ·
Undergrad Tunneling of light through thin metal films
- Dale
- · Replies 12 ·
Undergrad Electron wave addition using phasor diagram
- jjson775
- · Replies 8 ·
High School Is it possible to find the energy level of a hydrogen atom in this way?
- hongseok
- · Replies 4 ·
Undergrad Robertson uncertainty relation for the angular momentum components
- Yan Campo
- · Replies 2 ·
Undergrad Is the Vacuum Energy Density Sign Correct for Bosons?
- gerald V
- · Replies 3 ·
Undergrad Constant phase factors in wavefunctions
- Ibix
- · Replies 5 ·
Undergrad How Does a Qubit Exist as Both 1 and 0 Simultaneously?
- InquiringMind
- · Replies 2 ·
Undergrad When does the separation of variables work
- kelly0303
- · Replies 2 ·
Undergrad I want to expand a Gaussian wavepacket in terms of sines
- saadhusayn
- · Replies 2 ·
Undergrad Can a single photon of a single frequency pass through a FP cavity?
- Daniel Petka
- · Replies 29 ·
Undergrad How Do You Compute the Density Matrix of a Bipartite State?
- Rayan
- · Replies 2 ·
Undergrad Noether's Theorem in the Presence of a Charged Operator
- thatboi
- · Replies 1 ·
Undergrad The lore on complex probabilities
- arivero
- · Replies 4 ·
Undergrad Derivation of normal Zeeman-Effect
- PhysicsRock
- · Replies 5 ·
Undergrad Is a Time Rotation Operator Analogous to Spatial Rotations Possible?
- member 743765
- · Replies 2 ·
Undergrad Electromagnetic radiation, photons, quantized energy levels
- asf33
- · Replies 1 ·
Undergrad Are All Photons Truly Virtual?
- Hill
- · Replies 6 ·
Undergrad The classical concept of work in a QCD context?
- walkeraj
- · Replies 2 ·
Undergrad Virtuals particles, vacuum and infinite energy
- Donut
- · Replies 5 ·
Undergrad The theory on the effects of polarizers on particles wavefunctions
- tade
- · Replies 6 ·
Undergrad TISE solutions should be combinations-of-eigenstates, why this is not?
- JackeTheDog132
- · Replies 3 ·
Undergrad Is this a valid quantum Cheshire cat?
- pines-demon
- · Replies 13 ·
Undergrad Spin state, base transformation
- usai
- · Replies 3 ·
Graduate Question on Zeno time derivation
- Mainframes
- · Replies 4 ·
Graduate Did spatial dimensions emerge from the Big Bang?
- Eric Singer
- · Replies 19 ·
Graduate Fusion at lower energy cost than classical ion approach
- Mainframes
- · Replies 1 ·
Undergrad Interpreting bra-ket notation for probability amplitudes
- nomadreid
- · Replies 17 ·
High School Can entangled particle pairs be prepared with biased superposition probabilities?
- bulx
- · Replies 27 ·
High School How are the spins of two entangled photons measured at light speed?
- Walrus
- · Replies 6 ·
Graduate Can wave particle dualism be replaced by a monistic model?
- breakwater
- · Replies 2 ·
Undergrad Very basic questions about operators in QM
- olgerm
- · Replies 31 ·
Undergrad Why don't we bury Schrodinger's Cat?
- bushmonk
- · Replies 143 ·
Undergrad Coefficients in the Schrodinger equation and the momentum operator
- Shen712
- · Replies 7 ·
Undergrad A probability of field amplitude in QFT
- MichPod
- · Replies 23 ·
Graduate What happens when entangled photons are split into different paths?
- JamesPaylow
- · Replies 41 ·
High School Antiparticles moving opposite direction in time?
- rolnor
- · Replies 2 ·
Undergrad Double slit experiment with observer
- DoofWarrior
- · Replies 14 ·
Undergrad Deriving the Ginzburg criterion for the Ising model
- thatboi
- · Replies 1 ·
High School Are Schrodinger's cat and the double slit experiment the same idea?
- vadadagon
- · Replies 42 ·
High School Schrödingers cat, is it just mumbo-jumbo?
- rolnor
- · Replies 39 ·
Graduate Relationship between bare and renormalized beta functions
- Siupa
- · Replies 2 ·
Undergrad Normalization of wave functions
- Nana113
- · Replies 3 ·
Undergrad Is the photon field a vector field and a gauge field?
- syfry
- · Replies 6 ·
Graduate Quantitative description of successive Stern-Gerlach measurements
- Garlic
- · Replies 1 ·
Undergrad Most Likely Position of an Electron
- bob012345
- · Replies 30 ·
Undergrad Commutators, operators and eigenvalues
- dyn
- · Replies 7 ·
Undergrad How non-conscious can an Observer be and cause wave function collapse?
- pholmes
- · Replies 23 ·
High School Is the Born rule truly independent from other postulates in quantum mechanics?
- SCHROEDERFPM
- · Replies 26 ·
Graduate Don't understand equation with overleftrightarrow symbol
- joneall
- · Replies 10 ·
High School Quantum Physics Can Explain Earth’s Weather
- bhobba
- · Replies 20 ·