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
Graduate Is the Nexus Graviton a Thing?
- Gort
- · Replies 4 ·
Undergrad Hidden dimensions and quadratic term of a free field
- victorvmotti
- · Replies 4 ·
Graduate Reasonable measurement of both coordinate and momentum?
- MichPod
- · Replies 3 ·
Undergrad Energy of an electron with Schrodinger's equation
- cc94
- · Replies 4 ·
Undergrad Operation on complex conjugate
- Thejas15101998
- · Replies 2 ·
Graduate Osterwalder-Schrader theorem and non-relativistic QM
- king vitamin
- · Replies 6 ·
Undergrad Concepts to understand Quantum Tunneling
- SameerTahir
- · Replies 5 ·
Undergrad Wave Function Collapse: Quantifying Quickness
- Thejas15101998
- · Replies 8 ·
Graduate Can imaginary position operators explain real eigenvalues in quantum mechanics?
- SeM
- · Replies 2 ·
High School Quantum Teleportation Question from a Curious 10 year old
- Jacques Marrot
- · Replies 14 ·
High School Why doesn't this FTL communication scheme work?
- Christofer Br
- · Replies 6 ·
Graduate Implications of violation of the Leggett–Garg inequality
- alphajoza
- · Replies 7 ·
High School Quantum state of the Universe?
- laymanB
- · Replies 15 ·
Undergrad Squaring a Sum of Ket-Bra Operators
- jstrunk
- · Replies 1 ·
Graduate Superluminal Signalling proposal in peer-reviewed journal
- Pelion
- · Replies 12 ·
High School Bose–Einstein condensate and Hadron Collider
- PhyHyped
- · Replies 2 ·
Undergrad Fermi gas at the absolute zero T
- JH_Park
- · Replies 1 ·
Undergrad Concept underlying recent Serra-Lutz cold-to-hot experiment
- overzealous
- · Replies 2 ·
Undergrad Why does heat flow from cold to warm carbon and hydrogen in a correlated quantum system?
- overzealous
- · Replies 19 ·
Undergrad Is the Compton scattering angle related to the incident energy?
- Adel Makram
- · Replies 3 ·
Graduate Hamiltonian in an electromagnetic field
- Lucy166
- · Replies 1 ·
Undergrad Can angular momentum be applied to non circular rotations?
- Fruit Water
- · Replies 2 ·
Undergrad Schwinger effect verified by Unruh temperature?
- jcap
- · Replies 5 ·
Undergrad Hamiltonian for an Optical Phase Shifter?
- Twigg
- · Replies 1 ·
Undergrad Does adding one quark to a million change QCD system properties?
- tzimie
- · Replies 19 ·
Undergrad What is the experimental difference between spin down and minus spin down?
- Getterdog
- · Replies 6 ·
Undergrad The Relation Between Wavefunctions in Dirac Equation
- Bob Dylan
- · Replies 11 ·
Graduate What are local and non-local operators in QM?
- cristianbahena
- · Replies 5 ·
Undergrad Dirac's Rest Mass in Minowski Spacetime
- Bob Dylan
- · Replies 4 ·
Undergrad Dirac-Delta Function, Different Integration Variable
- Ibraheem
- · Replies 14 ·
Undergrad Little issue regarding physical states
- Tio Barnabe
- · Replies 37 ·
Undergrad Modified double-slit experiment - two photons
- MichPod
- · Replies 13 ·
High School Quantum Mechanics is not a theory?
- Zafa Pi
- · Replies 19 ·
Graduate How does a pseudo-Hermitian model differ from a Hermitian?
- SeM
- · Replies 13 ·
Graduate Mathematical Quantum Field Theory - Field Variations - Comments
- Urs Schreiber
- · Replies 6 ·
High School Casimir effect, energy conservation
- Gabriele Pinna
- · Replies 3 ·
Graduate Mathematical Quantum Field Theory - Geometry - Comments
- Urs Schreiber
- · Replies 32 ·
Graduate Mathematical Quantum Field Theory - Lagrangians - Comments
- Urs Schreiber
- · Replies 42 ·
Graduate Quantum physics phenomena that have spiral-phase portraits?
- SeM
- · Replies 16 ·
Graduate Transformation of position operator under rotations
- Anj123
- · Replies 1 ·
Graduate Shor's algorithm - need to uncompute auxiliary qubits?
- jarekduda
- · Replies 2 ·
High School Beam splitter, one photon, one detector?
- Idunno
- · Replies 11 ·
High School Quantum Tunneling: Reflection and Transmission Probabilities Explained
- PGaccount
- · Replies 3 ·
Undergrad Canonical Quantization: Proving the Theory
- Silviu
- · Replies 7 ·
Undergrad 2-particle Wavefunction and the Pauli Exclusion Principle
- Isaac0427
- · Replies 38 ·
Undergrad Requirements for pair production
- mark!
- · Replies 19 ·
High School Why Can't Two Fermions Occupy the Same Quantum State?
- riz
- · Replies 3 ·
Undergrad Can We Cool a Macroscopic Crystal to 1 nK?
- Petr Matas
- · Replies 8 ·
Undergrad Fubini-Study metric of pure states
- Alex Cros
- · Replies 9 ·
Undergrad Can Entangled Clocks Synchronize Time in Quantum Physics?
- .Scott
- · Replies 18 ·
Undergrad What does complex conjugate of a derivate mean?
- jstrunk
- · Replies 6 ·
Undergrad Understanding Neutron Star Formation Through Feynman Diagrams
- doggydan42
- · Replies 4 ·
Undergrad Quantum Entanglement: Particle Connection Effects
- Dan Nixon
- · Replies 7 ·
Undergrad Distinguishing electrons through spin
- Josh1079
- · Replies 6 ·
Undergrad Why does Fermi pressure derivation use both ultra-cold and relativistic limits?
- Silviu
- · Replies 5 ·
Undergrad Measurement Values for z-component of Angular Momentum
- MoAli
- · Replies 1 ·
Undergrad What mechanism enables interaction of the fields?
- Paul Woods
- · Replies 8 ·
Graduate Shor's algorithm and similar exploitation of QM?
- jarekduda
- · Replies 11 ·
Undergrad How does a harmonic oscillator model have the same frequency
- Fruit Water
- · Replies 1 ·
Undergrad Understanding Continuous Variable QKD
- Dopplershift
- · Replies 1 ·
Graduate Why light beams attract or repel each other even when they don't have charge
- SunRay-dvsh
- · Replies 20 ·
Undergrad Dirac equation solved in Weyl representation
- Milsomonk
- · Replies 2 ·
Undergrad Typo in Weinberg annihilation operator expression for bosons and fermions?
- Tio Barnabe
- · Replies 16 ·
Undergrad Do superposition states satisfy the time-dependent Schrödinger equation?
- dyn
- · Replies 2 ·
Undergrad Can Photons travel faster than c?
- Electric to be
- · Replies 46 ·
Undergrad Feynman Path Integral: Teaching and Questions
- Swamp Thing
- · Replies 8 ·
Undergrad Fluorescence from core shell quantum dots
- avkr
- · Replies 1 ·
Graduate Functional derivatives and propagators in φ³ theory tadpole diagrams
- Opus_723
- · Replies 2 ·
High School How do I learn about particle spin from basics?
- ISamson
- · Replies 12 ·
Graduate Can there be a subquantum level?
- quiet
- · Replies 15 ·
Undergrad Alternate form of wave equation
- Daniel Sellers
- · Replies 2 ·
Undergrad Why are fermion-only or boson-only systems easier to study than mixed states?
- Tio Barnabe
- · Replies 2 ·
Undergrad LS-Coupling: intuition why 2p^2 has no singlet P?
- Twigg
- · Replies 4 ·
High School Possible Loophole in the uncertainty principle
- RevolutionaryThinker
- · Replies 14 ·
Graduate Mathematical Quantum Field Theory - Spacetime - Comments
- Urs Schreiber
- · Replies 6 ·
Undergrad Multiplying a wavefunction by a constant number
- dyn
- · Replies 12 ·
Undergrad Dirac Matrices and the Pythagorean Theorem
- Bob Dylan
- · Replies 2 ·
Undergrad Generating a Hilbert space representation of a wavefunction
- SeM
- · Replies 43 ·
Graduate Integral ##\int_{-1}^{1} [P_{l}^{m}]^2 ln [P_{l}^{m}]^2 dx##
- dongsh2
- · Replies 12 ·
Undergrad Probability vs radial density-confusion
- cr7einstein
- · Replies 2 ·
Undergrad Wave Functions of Definite Momentum
- Jimmy87
- · Replies 40 ·
Undergrad Does the path Integral contain virtual particles?
- friend
- · Replies 21 ·
Undergrad Probability of Staying in x<0 for Superposition of 2 Gaussians
- WWCY
- · Replies 10 ·
Graduate Hilbert space notation in topological quantum field theory
- nateHI
- · Replies 1 ·
Undergrad Where Does the Energy Go in a Quantum System with 3 Possible Measurements?
- romsofia
- · Replies 8 ·
Undergrad Can a wave-function be a combination of states with different energies?
- dRic2
- · Replies 18 ·
Undergrad Probability amplitude between non-eigenstate quantum states
- Opus_723
- · Replies 9 ·
Undergrad Will a uniform magnetic field be considered as measurment?
- Adel Makram
- · Replies 35 ·
High School Alain Aspect's experiment setting
- Joao
- · Replies 17 ·
High School Is energy the same as matter in physics?
- jubalsquirrelly
- · Replies 7 ·
Undergrad Berry phase, Bra-Ket and gradient
- Lucy166
- · Replies 5 ·
Undergrad What is the Conservation of Information in Quantum Mechanics?
- Samo_phy
- · Replies 19 ·
Undergrad Measurement of a particle's position using photons
- Frank Castle
- · Replies 10 ·
High School Computing electron gyromagnetic ratio in lattice QFT
- star apple
- · Replies 12 ·
Undergrad What is "unitary evolution" of something in physics?
- Suekdccia
- · Replies 1 ·
Graduate Does measurement preserve unitarity in quantum mechanics?
- kdv
- · Replies 16 ·
Undergrad Why there must be a way of including gravity into a quantum theory?
- Tio Barnabe
- · Replies 14 ·
Insights Introduction to Perturbative Quantum Field Theory - Comments
- Urs Schreiber
- · Replies 108 ·
High School Can Fermions Exhibit Negative Chemical Potential Like Bosons?
- Vrbic
- · Replies 5 ·
High School Why is light reflected at the same angle rather than isotropically?
- Vrbic
- · Replies 3 ·