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 What makes up the bare mass of elementary particles?
- timmdeeg
- · Replies 3 ·
Undergrad Why doesn't two-photon absorption cause photoelectric emission below threshold?
- ParsaEF
- · Replies 5 ·
Undergrad Looking for resources to learn bra-ket notation
- zoltrix
- · Replies 3 ·
Undergrad Can hidden variables theory avoid simultaneously real properties in Bell's theorem?
- Lynch101
- · Replies 80 ·
Graduate First Order in Time Derivatives + Phase Space
- thatboi
- · Replies 1 ·
High School Definition of a random variable in quantum mechanics?
- Aidyan
- · Replies 12 ·
Undergrad Hall Conductivity and Rotational Invariance
- thatboi
- · Replies 1 ·
Graduate Are there any hypercomplex time values?
- DyerMaker
- · Replies 8 ·
Undergrad Generic Form of Hermitian Matrix
- thatboi
- · Replies 1 ·
Undergrad What Causes Ambiguity in Wick Rotation for Time-Ordered Correlators?
- thatboi
- · Replies 0 ·
High School Can we say a photon doesn't exist until the wavefunction collapses?
- Kavi
- · Replies 16 ·
Undergrad Boundary conditions for the momentum space SE
- andresB
- · Replies 17 ·
Graduate Wigner Weisskopf method for time varying Perturbation
- masteralien
- · Replies 3 ·
Undergrad Why is entanglement necessary in a quantum computer?
- Trikenstein
- · Replies 8 ·
Undergrad How does the quantum of action cause indeterminism?
- pholmes
- · Replies 6 ·
Undergrad Measurements and uncertainty principle
- daniel444
- · Replies 12 ·
Undergrad Physical Meaning of the Imaginary Part of a Wave Function
- deuteron
- · Replies 1 ·
Undergrad In the delayed-choice quantum eraser, why is a stepper motor used?
- murtazashab
- · Replies 2 ·
High School Entangled quants inside a particle accelarator
- SchrodingersQuants
- · Replies 4 ·
Undergrad How did Sommerfeld arrive at his quantum condition?
- Half Infinity
- · Replies 6 ·
Undergrad Why is Photon Energy Quantized in Terms of Sine Wave Frequency?
- QuantumCuriosity42
- · Replies 78 ·
Undergrad Force of an Electron on a Potential Wall?
- HarrisonG
- · Replies 7 ·
Undergrad Dirac delta identity in Fetter and Walecka equation 12.38
- thatboi
- · Replies 2 ·
Undergrad Klein-Gordon equation and continuity equation
- dyn
- · Replies 6 ·
Undergrad Problem with the polarization of entangled photons
- Christian Thom
- · Replies 7 ·
Undergrad Can AIs act as conscious observers?
- jeast
- · Replies 12 ·
Undergrad Non-wave solution to wave equation and virtual particles
- Fefetltl
- · Replies 9 ·
Undergrad Does the electron emit the photon when it transitions to lower energy?
- Wanda
- · Replies 21 ·
Undergrad What Is the Smallest Change Detected by a Multiport Interferometer?
- Precious Adegbite
- · Replies 0 ·
Undergrad Trouble with Product of Green's Functions
- thatboi
- · Replies 0 ·
Undergrad Why do exponential functions occur outside of finite walls?
- jjson775
- · Replies 9 ·
Graduate "Nonclassical Advantage in Metrology" paper
- PeterDonis
- · Replies 0 ·
Undergrad De Broglie Wavelength at rest: λ = h/p = h/0 when v=0?
- Kavi
- · Replies 5 ·
Undergrad Mass Dimension of Fields (Momentum space)
- thatboi
- · Replies 2 ·
Undergrad Why does photoelectron energy spread with fixed delay in attosecond metrology?
- genxium
- · Replies 2 ·
Undergrad Can an atom absorb a photon, yet its total kinetic energy is decreased?
- avicenna
- · Replies 54 ·
Undergrad Lindbladian Jump Operators Condition
- thatboi
- · Replies 0 ·
Graduate Phase difference between electric and magnetic dipole moment
- kelly0303
- · Replies 0 ·
Undergrad How Is the Mixed State Density Matrix Represented in Quantum Computing?
- thatboi
- · Replies 8 ·
Undergrad Density Matrix of Multiple Qubits
- thatboi
- · Replies 9 ·
Undergrad Does the Photon Play a Crucial Role in Quantum Mechanics?
- neobaud
- · Replies 64 ·
High School What is causing destructive interference in double slit experiment?
- Addez123
- · Replies 32 ·
Graduate Is entanglement also for time-like intervals?
- Heidi
- · Replies 3 ·
Undergrad Is entanglement a consequence of the singularity of the early universe?
- malvernstar
- · Replies 2 ·
Undergrad Looking for resources about tunneling effect on two delta functional barriers
- Andre_86
- · Replies 1 ·
Undergrad How Is the Integral from (3-22) to (3-23) Calculated in Quantum Mechanics?
- jamal_lamaj
- · Replies 5 ·
Undergrad Confusion about Scattering in Quantum Electrodynamics
- physwiz222
- · Replies 134 ·
Undergrad About time-independent non-degenerate perturbation expansion
- Ishika_96_sparkles
- · Replies 3 ·
Undergrad Magnetic flux through a superconducting ring
- Lagrange fanboy
- · Replies 5 ·
High School Frequency of an EM wave in Classical and Quantum Physics
- Hak
- · Replies 6 ·
Graduate How to draw the angles of the CKM matrix?
- Heidi
- · Replies 3 ·
High School Quantum Nonlocality or Non Counterfactual Definiteness?
- Point Conception
- · Replies 3 ·
High School What is the size of a VHF photon?
- Dante Meira
- · Replies 11 ·
High School Why doesn't the electron "wave" collapse at the double-slit?
- francis20520
- · Replies 28 ·
Undergrad Quantum behavior experiment flawed?
- tistemfnp
- · Replies 40 ·
Undergrad Is it possible for a BBO crystal to produce an interference pattern?
- Herbascious J
- · Replies 1 ·
Undergrad Measurement and Thermal Effects Similar?
- bushmonk
- · Replies 18 ·
Undergrad Recommendations for learning renormalization?
- RobertGC
- · Replies 18 ·
Graduate Creation and annihilation operator
- Sebas4
- · Replies 3 ·
Graduate Solving renormalization group equation in QFT
- qft-El
- · Replies 5 ·
High School Is Quantum Mechanics necessary for understanding electromagnetic phenomena?
- brianhurren
- · Replies 2 ·
Undergrad Energies of bound state for delta function potential
- ErwinZumer
- · Replies 2 ·
High School Searching for Quantum Mechanics Lecture on Delayed Choice Experiment
- kesha1
- · Replies 15 ·
Undergrad How to distinguish between diagonal vs horizontal/vertical polarization?
- JamesPaylow
- · Replies 15 ·
Undergrad Point of Demarcation between Quantum and Classical Behavior
- Twodogs
- · Replies 12 ·
Graduate Are irreversible processes absolutely irreversible, even given infinite time?
- Kinker
- · Replies 1 ·
Undergrad Is Calcite a parallel to the Stern-Gerlach experiment?
- Frigorifico9
- · Replies 43 ·
Graduate Renormalized vertex functions in terms of bare ones
- Siupa
- · Replies 0 ·
Undergrad How does one time-evolve a quantum state with its kernel function?
- Sciencemaster
- · Replies 0 ·
Graduate Quantization of real Klein-Gordon field (sign issues)
- The Tortoise-Man
- · Replies 24 ·
Graduate Anti-commutation relation for quantized fields
- The Tortoise-Man
- · Replies 13 ·
Undergrad Black Hole Fire Walls, Brick Walls, and the Casimir Effect
- .Scott
- · Replies 6 ·
Undergrad Impossible probability between theoretical possibility and reality
- Kinker
- · Replies 23 ·
High School Quantum Entanglement in Practice
- Pixelex
- · Replies 2 ·
High School Does decoherence prevent 100% of quantum tunneling of macro object?
- Kinker
- · Replies 4 ·
Undergrad If we wait infinitely long, will macroscopic objects undergo quantum tunneling?
- Kinker
- · Replies 54 ·
Undergrad Can Electrons or Photons Exceed Light Speed?
- cathrynliz
- · Replies 1 ·
Undergrad Questions on the classical interpretation of (normal) Zeeman effect
- ValeForce46
- · Replies 10 ·
High School Wavefunction and Lorentz Invariance
- cosmanino2050
- · Replies 1 ·
High School Preference for the notation used for the wave function?
- entropy1
- · Replies 9 ·
Undergrad In what chapter do Mehra and Rechenberg discuss Pauli matrices?
- Frigorifico9
- · Replies 6 ·
Undergrad Could a quantum computer simulate any system based on different types of logic?
- murtazashab
- · Replies 2 ·
Graduate Lagrangian in the Path Integral
- YeaNah
- · Replies 13 ·
Undergrad Does the Stern-Gerlach experiment measure only one spin component?
- okaythanksbud
- · Replies 12 ·
Undergrad Is my interpretation of the g-factor correct?
- Frigorifico9
- · Replies 4 ·
High School Direct sum decomposition into orthogonal subspaces
- sindhuja
- · Replies 2 ·
Undergrad Who was the first to make a Stern-Gerlach experiment with two magnets?
- Frigorifico9
- · Replies 9 ·
Undergrad Normalizing factor of wave function
- Lagrange fanboy
- · Replies 13 ·
Undergrad What Is the Difference Between Loss and Cost Functions in Quantum Computing?
- SaschaSIGI
- · Replies 3 ·
Undergrad Electrical Analog of Aharonov-Bohm Effect
- LarryS
- · Replies 8 ·
Undergrad Parallel transport and entanglement
- Heidi
- · Replies 5 ·
Undergrad When was the formula for the Stern-Gerlach experiment found?
- Frigorifico9
- · Replies 7 ·
High School What are quantum states of molecular rotation and torsion?
- syfry
- · Replies 4 ·
Graduate SU(2) and SU(3) representations to describe spin states
- spin_100
- · Replies 7 ·
Undergrad How to get the energy eigenvalue of the Hamiltonian: H0+λp/m ?
- Jiangwei Du
- · Replies 5 ·
Undergrad What do the authors of the paper mean here exactly by path integral?
- Andrewmiller5432
- · Replies 6 ·
High School Virtual particles and Heisenberg
- jcalises
- · Replies 15 ·
Undergrad Solving the Schrodinger Equation for a particle being measured
- physwiz222
- · Replies 6 ·
Undergrad What is the energy of an atom in a magnetic trap as a function of position?
- Malamala
- · Replies 6 ·
Undergrad Entangled, mixed state with conditional entropy zero
- greypilgrim
- · Replies 1 ·