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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Undergrad Can Quantum Fields be derived from Particles?
- friend
- · Replies 12 ·
Undergrad Why does i² equal -1 in the wave function derivative?
- Another
- · Replies 2 ·
Graduate Stephen Weinberg on Understanding Quantum Mechanics
- jedishrfu
- · Replies 152 ·
Undergrad Understanding Double Slit interference and Uncertainty
- John Morrell
- · Replies 7 ·
Undergrad Too much info for multiparticle wave function?
- MichPod
- · Replies 8 ·
Undergrad A, a† etc. within integrals: does it have to be so hard?
- Swamp Thing
- · Replies 1 ·
Undergrad Entanglement and photon polarization
- fog37
- · Replies 13 ·
Undergrad Quantum Mechanics does Riemann Zeta Function
- jedishrfu
- · Replies 1 ·
Undergrad How do i find the eigenvalues of this tough Hamiltonian?
- baouba
- · Replies 1 ·
High School Commonly quoted PF article required.
- houlahound
- · Replies 13 ·
High School How does quantising energy resolve the ultraviolet catastrophe?
- Jordan Regan
- · Replies 3 ·
Undergrad Decomposing a density matrix of a mixed ensemble
- Gabriel Maia
- · Replies 4 ·
High School Conservation of Total Spin in the Stern Gerlach Experiment
- CassiopeiaA
- · Replies 4 ·
Undergrad What does abstract Hilbert space mean in quantum mechanics?
- mike1000
- · Replies 17 ·
High School Irreversibility vs reversibility
- Blue Scallop
- · Replies 57 ·
Undergrad Complex numbers in quantum mechanics
- snate
- · Replies 2 ·
High School "Distribution" of a particle in different situations
- davidge
- · Replies 6 ·
Undergrad Why does Y(2,0) have a disk around the z-axis if m=0?
- Archeon
- · Replies 3 ·
High School What is the best way to imagine a photon?
- Daniel Petka
- · Replies 25 ·
Graduate Paper Spelunking: "Particle Creation by Black Holes" - S.H.
- wraith
- · Replies 27 ·
Undergrad Is Entanglement Commutative in Quantum Computing?
- Kenneth Adam Miller
- · Replies 4 ·
Undergrad Two orthonormal bases that span the same space
- mike1000
- · Replies 14 ·
Undergrad Mathematical steps in the variational method derivation
- mody mody
- · Replies 4 ·
Undergrad Phase Space and two dimensional Hilbert Space
- Gean Martins
- · Replies 8 ·
Undergrad What does the Hadamard correspond to in hardware?
- Kenneth Adam Miller
- · Replies 12 ·
Undergrad Amplitude moving through detectors
- Swamp Thing
- · Replies 2 ·
Undergrad What Is the Physical Significance of ##\beta_{tot}## in Molecular Polarization?
- Konte
- · Replies 1 ·
Graduate Reduced Density Operator and Entanglement
- Sharkey4123
- · Replies 4 ·
Undergrad How Does Wave Function Collapse Work in Quantum Mechanics?
- Aufbauwerk 2045
- · Replies 22 ·
Undergrad What Is the Meaning of Simultaneous Reality in the EPR Paradox?
- victor94
- · Replies 3 ·
Undergrad What is the significance of the Lande g-factor in nuclear physics?
- teroenza
- · Replies 2 ·
High School Are particles in macroscopic objects in collapsed eigenstates?
- jaydnul
- · Replies 100 ·
Undergrad Do we still experience quantum effects in decohered systems?
- jaydnul
- · Replies 14 ·
Undergrad Time Difference on a quantum level
- Dillion Harper
- · Replies 1 ·
Graduate Bell's theorem mathematical content
- RockyMarciano
- · Replies 35 ·
Undergrad Does decoherence create a localized wave source rather than a particle?
- danihel
- · Replies 1 ·
Undergrad What Happens When a Photon Hits an Electron?
- Ivanov
- · Replies 1 ·
Undergrad Representing the imaginary unit i in the time-dependent Schrödinger equation
- woody stanford
- · Replies 4 ·
Undergrad Question(s) about Dirac notation
- mike1000
- · Replies 8 ·
Undergrad What does the state vector mean?
- mike1000
- · Replies 50 ·
Undergrad Behavior of successive measurements
- mike1000
- · Replies 2 ·
Undergrad Why Does Quantum Mechanics Require Complex Numbers?
- MichPod
- · Replies 5 ·
High School Why is state transition probability symmetric?
- normvcr
- · Replies 2 ·
Undergrad Xt - Understanding Dipole Moment Components in Rigid and Non-Rigid Molecules
- Konte
- · Replies 5 ·
High School Quantization of energy and ultraviolet catastrophe
- physics user1
- · Replies 4 ·
Undergrad Real world process that results in reciprocal wavefunction
- NotASmurf
- · Replies 5 ·
Undergrad Understanding Orthogonality: QM Lectures by Dr. Physics A
- john t
- · Replies 3 ·
Undergrad Photon number state and Doppler shift
- Swamp Thing
- · Replies 4 ·
Undergrad Why is the total number of quantum states = 2n^2 for some n?
- jerronimo3000
- · Replies 3 ·
Undergrad How does rotating an operator affect its eigenvalues and eigenvectors?
- mike1000
- · Replies 30 ·
Undergrad Are superposition states observable?
- mike1000
- · Replies 29 ·
Undergrad Do operators A and Hamiltonian share a set of eigenfunctions if they commute?
- dyn
- · Replies 3 ·
High School Quantum mechanics and the macroscopic
- jaydnul
- · Replies 4 ·
High School How does sideband detection work in a Penning trap?
- joegibs
- · Replies 2 ·
Undergrad Could a Negative Dimension exist
- SakoNova
- · Replies 12 ·
Undergrad Hadamard gate effect on C input in quantum circuit
- victor94
- · Replies 1 ·
Graduate Gauge transformation of gauge fields in the adjoint representation
- spaghetti3451
- · Replies 2 ·
Undergrad Is chirality a conserved quantity?
- haael
- · Replies 2 ·
Undergrad Who will win -- Pauli or Einstein?
- Kaushik_KS
- · Replies 7 ·
Undergrad What does a superposition of states mean in quantum mechanics?
- mike1000
- · Replies 52 ·
High School Scientists evade the Heisenberg uncertainty principle
- wolram
- · Replies 1 ·
Undergrad Understanding Entanglement Measures and the Bloch Sphere Representation
- edguy99
- · Replies 1 ·
Undergrad How do electronics in tranistors tunnel if decohered
- jaydnul
- · Replies 4 ·
Undergrad On-Demand Photon Pairs: Entanglement or Necessity?
- Swamp Thing
- · Replies 6 ·
Undergrad Symmetric, antisymmetric or neither
- fog37
- · Replies 4 ·
Undergrad Calculating the probability density of a superposition
- Archeon
- · Replies 7 ·
Undergrad Names and formulae for quantum numbers n, l, m, s
- N88
- · Replies 7 ·
Undergrad Quantum-Mechanical treatment of circuits
- davidge
- · Replies 2 ·
Undergrad What does it mean to "drive a particle" in a penning trap?
- joegibs
- · Replies 3 ·
Undergrad QFT event amplitudes and reversed time interpretation
- asimov42
- · Replies 6 ·
Graduate Flux-flux correlation function under Feynman's path integral
- junt
- · Replies 2 ·
Undergrad Can electric fields be teleported and entangled like photons?
- Checkster2323
- · Replies 3 ·
Undergrad Are all quantum-classical differences rooted in spin?
- N88
- · Replies 6 ·
Undergrad Angular momentum raising/lowering operators
- dyn
- · Replies 6 ·
High School Measuring velocity and interference?
- joegibs
- · Replies 5 ·
Undergrad What causes light to diffract in the double slit experiment?
- Ivanov
- · Replies 4 ·
Undergrad Does Relativistic Motion Impact Quantum Optical Experiments?
- Swamp Thing
- · Replies 2 ·
Graduate Coupling constant in Yang-Mills Lagrangian
- spaghetti3451
- · Replies 2 ·
Graduate How a laser resonator generates the standing wave?
- Basov
- · Replies 5 ·
High School How do you build a quantum suicide machine?
- Elias
- · Replies 31 ·
Undergrad How can Spin-up z and spin-down z span the space?
- mike1000
- · Replies 9 ·
Graduate Polarization of gauge bosons and gauge choice
- spaghetti3451
- · Replies 4 ·
Undergrad Why does a hard momentum cut-off break Lorentz invariance?
- Frank Castle
- · Replies 5 ·
Undergrad Quantizing the Klein-Gordon field from classical to quantum
- leo.
- · Replies 5 ·
Graduate Change in the EM field energy due to dispersion of a wave packet
- SergioPL
- · Replies 20 ·
Graduate Manipulation with the Dirac equation
- spaghetti3451
- · Replies 4 ·
Undergrad Classical analogue of quantum contextuality
- Demystifier
- · Replies 23 ·
Undergrad Hong-Ou-Mandel with two beam splitters
- Swamp Thing
- · Replies 5 ·
High School Quantum mechanic has something to do with electromagnetism?
- Massi
- · Replies 1 ·
Undergrad Solution to the Dirac equation
- klabautermann
- · Replies 4 ·
Undergrad Can a particle observe itself while quantum tunneling?
- sunmaggot
- · Replies 7 ·
Undergrad What does the magnetic moment of a particle depend on?
- joegibs
- · Replies 2 ·
Undergrad Do quantum linked rings (quantum knots) have energy?
- Noduagga
- · Replies 2 ·
Undergrad What is the physical significance of Bell's math?
- N88
- · Replies 199 ·
Undergrad Does this explain the Zeno effect observed
- Trollfaz
- · Replies 5 ·
Graduate Experimental tests on the reality of the quantum state
- bohm2
- · Replies 4 ·
Graduate Higher Dimension and Randomness
- Kaura
- · Replies 1 ·
Undergrad Density matrix for two-electron spin system with 4×4 dimension mismatch
- Noora Alameri
- · Replies 5 ·
Undergrad Bound states of a periodic potential well in one dimension
- Chuckstabler
- · Replies 2 ·
Undergrad Finite Square Well: Bond States and Asymmetric Potential Wells
- LagrangeEuler
- · Replies 3 ·