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 Who did this experiment with photons?
- vohongsinh164
- · Replies 3 ·
Undergrad Why does quantum mechanics believe that gravity is a field?
- Michael Barry
- · Replies 10 ·
Undergrad What Is the Origin of Unruh Temperature and Its Implications?
- PGaccount
- · Replies 13 ·
Undergrad Book on quantum field theory without heavy mathematics
- gtorassa
- · Replies 5 ·
High School How Are 2D Standing Waves Extended to 3D in Quantum Mechanics?
- etotheipi
- · Replies 1 ·
High School Gram-Schimidt orthonormalization for three eigenvectors
- Wrichik Basu
- · Replies 7 ·
Undergrad Why must the x² coefficient vanish in the quantum harmonic oscillator?
- Garlic
- · Replies 7 ·
Undergrad How Does a Photon Know Which Slit to Pass Through in a Double Slit Experiment?
- entropy1
- · Replies 5 ·
Undergrad Identify the charge and strangeness of particle Y
- pkc111
- · Replies 2 ·
High School Why do photons only interact with charged particles?
- jeremyfiennes
- · Replies 20 ·
Graduate Regarding Coleman's Sine-Gordon Duality
- QFT1995
- · Replies 3 ·
Graduate Bosonization Formula and its Effects on Fermion Number
- Demystifier
- · Replies 5 ·
Graduate Relation between spin dephasing time T2* and spin relaxation time
- rafaelg7
- · Replies 2 ·
Undergrad Delayed-choice quantum eraser experiment
- gtorassa
- · Replies 6 ·
High School Can someone help me understand as well as validate this article
- HankDorsett
- · Replies 7 ·
Undergrad Heavier bosons and their function and detection
- Ranku
- · Replies 5 ·
Graduate Can decoherence be associated with heat generation?
- Prathyush
- · Replies 6 ·
Undergrad Is Quantum Mechanics Truly Time-Reversal Symmetric?
- WWCY
- · Replies 5 ·
Undergrad Is the product of two hermitian matrices always hermitian?
- Happiness
- · Replies 93 ·
High School Do virtual particles travel at light speed or have virtual rest mass?
- Ranku
- · Replies 20 ·
Graduate Simultanious eigenstate of Hubbard Hamiltonian and Spin operator in tw
- schwarzg
- · Replies 2 ·
Undergrad Is Time Travel Possible with Entangled Particles?
- snuz2001
- · Replies 31 ·
Graduate How far can one change a model before it leaves the universality class
- thephystudent
- · Replies 4 ·
Undergrad Time independent perturbation theory in atom excitation
- Malamala
- · Replies 1 ·
Undergrad Anticommutators of the spin-1 representation
- Tony3
- · Replies 1 ·
Graduate Is the Landau pole in QED an artifact of perturbative methods?
- Demystifier
- · Replies 25 ·
Undergrad What is the physical meaning of <p>?
- blackbeans
- · Replies 3 ·
Graduate Creation/annihilation operators and trigonometric functions
- jshtok
- · Replies 9 ·
Undergrad (In)dependence in entanglement experiments
- entropy1
- · Replies 5 ·
Undergrad Describing entanglement collapse with absolute time
- kurt101
- · Replies 20 ·
Undergrad Relationship between Planck Distribution and Quantization of Energy
- HelpMeGodWithPhysics
- · Replies 4 ·
Undergrad Metal Semiconductor contact (Part 2)
- Robotduck
- · Replies 1 ·
Graduate Does Fermi level change at metal-semiconductor contact?
- Robotduck
- · Replies 6 ·
Graduate Find Reduced Mass for Polyatomic Molecules
- Iceking20
- · Replies 4 ·
Graduate Confusion about 2016 Unruh paper - fluctuating vacuum energy density?
- asimov42
- · Replies 27 ·
Graduate Is the Berry connection metric compatible and torsion-free?
- Joker93
- · Replies 49 ·
Undergrad "Spatial Width," "Coherence Length," and the Measurement Problem
- charters
- · Replies 2 ·
Graduate Particle production in 1+1D QFT
- QFT1995
- · Replies 13 ·
High School Beta decay and the down quark.
- JackDixon
- · Replies 2 ·
Undergrad Influence on world's number and Bell's theorem
- jk22
- · Replies 1 ·
High School Kinetic and potential energy of electrons in semiconductor band diagrams
- Robotduck
- · Replies 5 ·
Undergrad What did Bohr mean by applying spacetime and energy-momentum relations twice?
- PGaccount
- · Replies 11 ·
Undergrad Annihilation/creation operator question
- KevinMcHugh
- · Replies 3 ·
Undergrad Hermitian operators in QM and QFT
- WWCY
- · Replies 7 ·
High School What causes quantum uncertainty?
- Ampulla
- · Replies 3 ·
High School Is information lost when a photon is absorbed?
- wywong
- · Replies 35 ·
Undergrad How to collapse a water wave through a double slit into particle behaviour?
- Happiness
- · Replies 21 ·
Undergrad Energy levels from the propagator
- PGaccount
- · Replies 1 ·
Undergrad Is an electron's spin always in some definite direction?
- Happiness
- · Replies 28 ·
Graduate Proof - gauge transformation of yang mills field strength
- spaghetti3451
- · Replies 13 ·
Undergrad Why doesn't high-energy positron-electron annihilation produce more gamma rays?
- geoelectronics
- · Replies 23 ·
Graduate Can wavefunction collapse be reconciled with SR through sheaf cohomology?
- Auto-Didact
- · Replies 13 ·
Graduate Massive gauge bosons in QFT in/out states
- Michael Price
- · Replies 60 ·
Graduate Does Quantum Mechanics Embrace Symmetry and Causality?
- Huang
- · Replies 6 ·
Undergrad How can atomic decay be random if half-life is so precise?
- artis
- · Replies 13 ·
Undergrad Can a free particle have a definite energy in quantum mechanics?
- dRic2
- · Replies 5 ·
Undergrad Transition probability density between two transmitted states
- amjad-sh
- · Replies 6 ·
Undergrad Doesn't the superposition in energy violate the conservation of energy
- ftr
- · Replies 27 ·
Graduate Explicit form of annihilation and creation operators for Dirac field
- QFT1995
- · Replies 6 ·
Undergrad Inadequate proof of Bloch's theorem?
- Happiness
- · Replies 87 ·
Undergrad Is an atomic electron transition a phase transition?
- Huang
- · Replies 6 ·
High School Wave function collapse and relativity of simultaneity in entanglement
- Lynch101
- · Replies 71 ·
Undergrad When is a system coherent or decoherent?
- zekise
- · Replies 2 ·
Undergrad Confusion with superposition of states
- ntt
- · Replies 2 ·
Graduate How Does Quantum Field Theory Preserve Causality?
- Jamister
- · Replies 9 ·
Undergrad Equation for levitation forces between the magnets and superconductor
- kipling_01
- · Replies 10 ·
Graduate Understanding time invariant of EM
- jdou86
- · Replies 10 ·
Undergrad Do photons experience a reaction force when they interact with matter?
- bob012345
- · Replies 5 ·
Undergrad Spooky action at a distance by electrons?
- Happiness
- · Replies 19 ·
Undergrad How does the von Neumann equation relate to Schrödinger's equation?
- TeethWhitener
- · Replies 4 ·
Undergrad Why we need completeness of eigenfuntions for QM to be internally consistent?
- Happiness
- · Replies 13 ·
High School Is Born's Rule Commutative in Quantum State Measurements?
- etotheipi
- · Replies 1 ·
Undergrad Confusion about factoring in quantum computation
- Haorong Wu
- · Replies 3 ·
Undergrad Preferred orientation of a nitrogen molecule in space?
- Happiness
- · Replies 24 ·
High School Does quantum mechanics treat time as absolute?
- Lynch101
- · Replies 69 ·
Undergrad Photon states and interference in an Interferometer
- zeronem
- · Replies 12 ·
Undergrad Would distinguishable particles experience bonding?
- Happiness
- · Replies 2 ·
Undergrad Clebsch-Gordan coefficients and their sign
- Aleolomorfo
- · Replies 1 ·
Undergrad Wave function when there is coupling between spin and position
- Happiness
- · Replies 3 ·
High School Quarks and Antiquarks in a baryon
- Anthony Beckwith
- · Replies 5 ·
High School Can a Quark Tunnel Out of a Proton?
- Tumorsito
- · Replies 6 ·
Undergrad How to be sure we have found all magnetic quantum numbers?
- Happiness
- · Replies 9 ·
Undergrad How to choose the way an excited electron loses energy?
- GuillemVS
- · Replies 5 ·
Undergrad Is the Born Rule Derivable from Other Postulates in Quantum Mechanics?
- tomdodd4598
- · Replies 17 ·
Undergrad Can an electron in a spherically symmetric potential have non-zero spin?
- Happiness
- · Replies 3 ·
Undergrad Excited electrons' behaviour, how do they work?
- GuillemVS
- · Replies 1 ·
Undergrad Why does an electron orbital have a preferred z axis?
- Happiness
- · Replies 53 ·
High School Is a Universe Without Parallel Universes Possible in the Multiverse Theory?
- Colonel Travis
- · Replies 12 ·
High School Might all physical quantities be quantized?
- somega
- · Replies 6 ·
Undergrad Double slit with quarter wave plates and polarizing detector
- michael29
- · Replies 9 ·
Graduate How can we derive the results that we know about QM from QED?
- Jamister
- · Replies 22 ·
High School IB Physics Extended Essay - Quantum Levitation
- kipling_01
- · Replies 3 ·
Undergrad How electrons absorb or emit photons
- Wille
- · Replies 4 ·
Undergrad Does a Gaussian wave packet remain Gaussian?
- Happiness
- · Replies 5 ·
Graduate Why does perturbation theory break down in QED bound states like hydrogen?
- Jamister
- · Replies 1 ·
Undergrad Electric dipole moment of the nucleus of an atom
- tamir
- · Replies 5 ·
Undergrad Are time and space continuous or discrete?
- Haorong Wu
- · Replies 8 ·
Undergrad Voltage between electron and proton in ground state hydrogen atom?
- epotratz
- · Replies 26 ·
High School What Are Quantum Fields and How Do They Relate to Particles?
- sayetsu
- · Replies 19 ·
High School I formulating a research question for my Extended Essay
- kipling_01
- · Replies 3 ·