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 Photoelectric effect and Saturation Current
- fog37
- · Replies 12 ·
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 ·