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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.

Quantum Interpretations and Foundations

On computing quantum waves exactly from classical action
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Undergrad On computing quantum waves exactly from classical action
High School Transferring information faster than the speed of light
  • Reality Researcher
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Undergrad Field Operator for Edge States
  • thatboi
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Graduate Can humans really create the quantum computer they expected?
  • george1962
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2
Undergrad Tunneling with Gaussian Wave Packet
  • Tertius
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2
Undergrad Researchers find experimental evidence for a graviton-like particle
  • laymanhobbist
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17
Undergrad A measured spin is still a Qbit
  • Gary Venter
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3
Undergrad Is Single Slit Diffraction Explained by the Heisenberg Uncertainty Principle?
  • J O Linton
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22
Undergrad Quantum Eraser Experiment at home
  • Bila
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1
Undergrad Single slit diffraction and the HUP
  • J O Linton
  • · Replies 25 ·
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25
Undergrad Breaking the Light Speed Barrier?
  • SWIRF
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5
Undergrad The photoelectric effect: What frequency does υₛ refer to in the work function?
  • JACKR
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9
Graduate Interpreting the energy density of QFT vacuum states
  • math-physicist
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3
Undergrad Understanding the dynamics of a perturbed quantum harmonic oscillator
  • Rayan
  • · Replies 3 ·
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3
High School Heisenberg's indeterminacy principle with non-point particles ?
  • Standard
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16
Undergrad Different Approaches to the Time Dependent Variational Principle
  • Matthew_
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High School Question about Bell's inequalities and 3-particle entanglement
  • Isaac Hart
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14
Undergrad Finite potential well transmission coefficient
  • lys04
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11
Undergrad Testing superposition of spacetime curvature
  • Maximus_Ann
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1
Undergrad [QFT-Schwartz Page. 256] Violation of operator exponentiation rule ?
  • Golak Bage
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2
High School Quantum teleportation of usable information
  • Isaac Hart
  • · Replies 19 ·
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19
Graduate What is the meaning of "Amplitude of Detection" in A. Zee's QFT book?
  • Golak Bage
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1
Undergrad Motivation behind the Operator-Formalism in QM
  • deuteron
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3
Undergrad Color charge is not scalar -- do their components have dimensions?
  • south
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12
Undergrad The Dirac equation as a linear tensor equation for one component
  • akhmeteli
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0
Undergrad Generalized Eigenvalues of Pauli Matrices
  • thatboi
  • · Replies 1 ·
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1
Undergrad Planck's Constant times the speed of light
  • LarryS
  • · Replies 11 ·
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11
Undergrad Eigenstates of particle with 1/2 spin (qbit)
  • cianfa72
  • · Replies 24 ·
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24
Undergrad If the gravitational constant had a different value
  • Ranku
  • · Replies 13 ·
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13
Graduate How produce twin photons in practice?
  • Quant
  • · Replies 3 ·
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3
Undergrad What are anomalies in quantum field theory?
  • KleinMoretti
  • · Replies 4 ·
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4
Undergrad Qubits state calculation
  • Hennessy
  • · Replies 6 ·
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6
Undergrad Quantum mechanics formalisms and conservation of energy
  • KleinMoretti
  • · Replies 11 ·
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11
Undergrad When and why can ∂p/∂t=0 in position space?
  • George Keeling
  • · Replies 15 ·
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15
Undergrad EPR in Bohm formulation
  • cianfa72
  • · Replies 45 ·
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45
Undergrad How to enter measurement results into Bell inequality?
  • greypilgrim
  • · Replies 17 ·
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17
Undergrad Why doesn't gravity cause double-slit decoherence?
  • oknow
  • · Replies 11 ·
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11
High School Could energy be destroyed during particle annihilation?
  • KleinMoretti
  • · Replies 16 ·
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16
Undergrad Bell tests: Changing detector settings "just before photon arrives"
  • greypilgrim
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4
Graduate X measurement modeled in non-separable Hilbert space
  • normvcr
  • · Replies 9 ·
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9
Undergrad Klein-Gordon Equation with boundary conditions
  • dsaun777
  • · Replies 1 ·
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1
Graduate Testing antimatter fundamentals
  • WeeWillieWinkie
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7
Undergrad Conservation of energy and wave function collapse
  • KleinMoretti
  • · Replies 33 ·
2
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33
Undergrad How to "derive" momentum operator in position basis using STE?
  • LightPhoton
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3
Undergrad Freqeuncy of Matter Waves Approaches Infinity as Velocity Approaches c
  • hisgutsaysmaybe
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2
Undergrad Material Waves and Wave Functions
  • deuteron
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9
High School How do quantum phenomena affect macroscopic phenomena?
  • curiosity1
  • · Replies 11 ·
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11
Graduate Mixed quantum state of the Bose-Einstein distribution
  • Bertt
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3
Undergrad Quantum particle's state in momentum eigenfunctions basis
  • cianfa72
  • · Replies 16 ·
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16
High School Using Interference Principles to Increase the Efficiency of Solar Panels
  • DUOScoins
  • · Replies 0 ·
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0
Undergrad Is quantum interference an instantaneous consequence of superposition ?
  • Husserliana97
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12
Graduate How to know the number of Feynman diagrams for a given order?
  • pines-demon
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Undergrad Completeness of Eigenfunctions of Hermitian Operators
  • gaiussheh
  • · Replies 22 ·
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22
Undergrad Does gravity cause quantum decoherence?
  • Kinker
  • · Replies 20 ·
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20
Graduate What is decoherence?
  • PeterDonis
  • · Replies 15 ·
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15
Undergrad Original HBT experiment with mercury isotope lamp
  • Swamp Thing
  • · Replies 2 ·
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2
Graduate Spontaneous emission and coherence
  • kelly0303
  • · Replies 1 ·
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1
Undergrad How is spin exchange interaction generalised to many electrons?
  • gaiussheh
  • · Replies 2 ·
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2
Undergrad Electrons keeping dynamical quantum fluctuations?
  • Suekdccia
  • · Replies 0 ·
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0
Undergrad Observing observables of an entity
  • quantum philosopher
  • · Replies 9 ·
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9
High School Does a photon's energy change as it refracts?
  • maxelcat
  • · Replies 4 ·
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4
Undergrad Does entanglement always conserve something?
  • Swamp Thing
  • · Replies 9 ·
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9
Undergrad Qbit pure vs mixed state space
  • cianfa72
  • · Replies 35 ·
2
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35
Graduate A particle locked inside an arrangement of Dirac delta potentials
  • hilbert2
  • · Replies 4 ·
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4
Undergrad Wave packet interpretation
  • selfsimilar
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7
Undergrad Representation of Spin 1/2 quantum state
  • cianfa72
  • · Replies 61 ·
3
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61
Undergrad Energy and momentum of a photon in a medium
  • weafq
  • · Replies 3 ·
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3
Undergrad Radiation from solid black bodies
  • Philip Koeck
  • · Replies 14 ·
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14
Undergrad How many spots will a rotating Stern-Gerlach apparatus produce?
  • Old Person
  • · Replies 32 ·
2
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32
High School Can objects in nature store light information on the quantum level?
  • Maximum7
  • · Replies 14 ·
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14
Undergrad Your Favorite Feynman Diagram?
  • Devin Powell
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3
Undergrad Quantum Hall Effect and Hall Voltage
  • Salamon
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0
Graduate QFT Superposition of Final States
  • masteralien
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3
Undergrad Subtractive mode intensity interferometry?
  • Swamp Thing
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0
Undergrad Electron counterpart of pseudothermal light source for quantum experiments
  • Swamp Thing
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0
High School Electron's movement after getting hit by a photon that bounces at 90 degrees
  • swnsy05
  • · Replies 4 ·
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4
High School Origins of the no-cloning theorem
  • martix
  • · Replies 6 ·
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6
Undergrad Feedback on Educational Script: What's a particle in QFT?
  • norwegian_hobby_sci
  • · Replies 5 ·
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5
Undergrad Are Superposition, the Uncertainty Principle, and Duality the same?
  • eow
  • · Replies 12 ·
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12
Graduate Vacuum Energy from Correlation Functions
  • masteralien
  • · Replies 7 ·
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7
Undergrad How Do Quantum Fluctuations Shape Cosmic Structures?
  • Leandro Bolonini
  • · Replies 2 ·
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2
Undergrad About nature of superposition of states
  • HighPhy
  • · Replies 124 ·
5
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124
Undergrad Infinite momentum is impossible, boundary term in integration by parts
  • George Keeling
  • · Replies 24 ·
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24
Undergrad Is the Black Hole Information Paradox Truly Resolved?
  • KleinMoretti
  • · Replies 5 ·
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5
Undergrad Artificially discretized quantum states - is it a thing?
  • Swamp Thing
  • · Replies 1 ·
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1
Undergrad Displacement operation acting on individual quadrature components
  • waadles
  • · Replies 3 ·
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3
Graduate How Are Rotations on the Bloch Sphere Implemented in Practice?
  • kelly0303
  • · Replies 1 ·
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1
Undergrad Phonon emission : Discrete event or a process with inner detail?
  • Swamp Thing
  • · Replies 2 ·
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2
Undergrad "Wave-particle duality" and double-slit experiment
  • HighPhy
  • · Replies 36 ·
2
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36
High School Double Slit Experiment: Dumb question that needs to be asked
  • Quarinteen
  • · Replies 60 ·
3
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60
Undergrad Feynman discussion of electron diffraction
  • elou
  • · Replies 23 ·
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23
High School Disappearance of interference pattern in double slit
  • elou
  • · Replies 12 ·
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12
Undergrad Example of SO(2) being not simply connected
  • Hill
  • · Replies 26 ·
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26
Undergrad Conservation of energy after measurement
  • KleinMoretti
  • · Replies 12 ·
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12
Undergrad Fundamental representation and adjoint representation
  • shinobi20
  • · Replies 27 ·
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27
Undergrad Double Check Normalization Condition
  • thatboi
  • · Replies 1 ·
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1
Graduate Question about Propagators in QFT
  • masteralien
  • · Replies 13 ·
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13
Graduate Gravity Measured with Milligram masses
  • jedishrfu
  • · Replies 3 ·
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3
Graduate Noise in Landau–Zener transition
  • kelly0303
  • · Replies 0 ·
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0
Graduate Understanding the Limitations of Electron Spin Resonance
  • sha1000
  • · Replies 5 ·
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5
Undergrad Number of qubits needed to simulate the universe
  • HighPhy
  • · Replies 22 ·
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22