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 Using measurement to extract energy?
- nashed
- · Replies 1 ·
Graduate Srednicki's normalization choice for lie algebra generators
- hideelo
- · Replies 1 ·
Undergrad Frustrated spontaneous emission
- Trollfaz
- · Replies 8 ·
High School Classical physics emerging from quantum physics
- Andrew Wright
- · Replies 6 ·
Graduate Scalar Fields with the Same Mass
- hilbert2
- · Replies 2 ·
Undergrad Why does the Dirac Hamiltonian go negative with antiparticle operators?
- Silviu
- · Replies 4 ·
High School Physical significance of wave function
- Wrichik Basu
- · Replies 4 ·
Graduate Quantum telescope (different meaning)
- nic30
- · Replies 1 ·
Undergrad Do Pions Exist Naturally in High Z Nuclei and How Do Their Half Lives Change?
- Kevin McHugh
- · Replies 4 ·
Undergrad Are any electrons ejected below the threshold frequency?
- lawlieto
- · Replies 4 ·
High School Do Instantaneous Reactions Imply Infinite Speed in Quantum Entanglement?
- Deepak K Kapur
- · Replies 17 ·
Graduate Forming a unitary operator from measurement operators
- Danny Boy
- · Replies 2 ·
High School If quantum particles can move to other universes, can macroscopic things move?
- TheQuestionGuy14
- · Replies 4 ·
Undergrad Particle has certain energy levels in a potential well?
- nickhobbs
- · Replies 4 ·
High School How does entanglement occur at such incredible speeds?
- Lunct
- · Replies 10 ·
High School Does measurement interaction cause the uncertainty principle?
- victorhugo
- · Replies 11 ·
Graduate How can quantum mechanics contribute in a Nuclear reactor
- madhisoka
- · Replies 10 ·
High School Is momentum in atoms part of the potential energy?
- mieral
- · Replies 17 ·
High School What is the wave function for a single electron?
- Quandry
- · Replies 11 ·
Undergrad Creation operator and Wavefunction relationship
- DeathbyGreen
- · Replies 6 ·
High School How do we know some particles don't exist until measured?
- Lunct
- · Replies 70 ·
High School How Precise Can QED Predict the Motion of Charged Particles?
- goran d
- · Replies 3 ·
Graduate Problem about Kohn Hohenberg theorem
- georg gill
- · Replies 3 ·
High School How is the Schrodinger Equation used in calculating forces of nature?
- mieral
- · Replies 28 ·
Undergrad Does the wave function collapse if a measurement is made but unobserved?
- PotentialReasoning
- · Replies 4 ·
Undergrad Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?
- Eye_in_the_Sky
- · Replies 35 ·
Undergrad Difference between field and wave equation
- Silviu
- · Replies 8 ·
Undergrad Is teleportation possible through quantum entanglement?
- STAR GIRL
- · Replies 2 ·
High School Is Decoherence Enough to Solve the Measurement Problem in Wave-Particle Duality?
- Jman091
- · Replies 5 ·
High School Question on the Bohr atomic model and energy
- physics user1
- · Replies 2 ·
Graduate Deriving total energy in a Hydrogen molecule
- fisher garry
- · Replies 2 ·
Undergrad Calculate the energy of the electron in a non-H like atom
- jorgeha
- · Replies 6 ·
High School Does detecting one slit in the double slit experiment show entanglement?
- Trollfaz
- · Replies 8 ·
High School Is it possible for any wave to be in a complex of waves?
- Gary Smith
- · Replies 8 ·
Undergrad How electrons move in subatomic world?
- Quantum Velocity
- · Replies 6 ·
Graduate Simple way to create entangled photon pairs?
- Cleber
- · Replies 21 ·
Undergrad How can an atom reach less than absolute zero?
- Quantum Velocity
- · Replies 35 ·
Undergrad Why doesn't mirror momentum transfer reveal photon path in Mach-Zehnder interferometer?
- greypilgrim
- · Replies 9 ·
Graduate Calculate the moment of inertia of H with the probability from wavefunction
- fisher garry
- · Replies 8 ·
Undergrad Forms of the Uncertainty Principle
- Thejas15101998
- · Replies 10 ·
Undergrad Mainstream quantum physics and consciousness
- Gary Smith
- · Replies 7 ·
Insights Entanglement entropy in quantum mechanics
- ShayanJ
- · Replies 22 ·
Undergrad Does measurement affect decay rate without interacting with the atom?
- Trollfaz
- · Replies 22 ·
Undergrad QM: Measurement & Wave Function Change
- Silviu
- · Replies 42 ·
Undergrad Why physics cannot explain what matter is in itself
- Gary Smith
- · Replies 1 ·
Graduate Is the overlap of coherent states circular symmetric?
- Danny Boy
- · Replies 1 ·
High School Can a particle be in two entanglements at the same time?
- Lunct
- · Replies 3 ·
High School What are the practical applications of QM and QFT?
- mieral
- · Replies 3 ·
High School Unanswered questions of quantum physics
- Gary Smith
- · Replies 2 ·
Undergrad Are special relativity rules encoded in the Dirac equation?
- raeed
- · Replies 1 ·
Undergrad Satellite based entanglement over 1200 km
- Auto-Didact
- · Replies 1 ·
Insights Entanglement Entropy – Part 2: Quantum Field Theory - Comments
- ShayanJ
- · Replies 3 ·
High School Simple intro about Schrödinger's cat metaphor
- houlahound
- · Replies 2 ·
Undergrad How can the total orbital angular momentum be zero?
- steve_a
- · Replies 28 ·
Graduate Using feedback in quantum measurements
- Johny Boy
- · Replies 7 ·
Undergrad Does measuring an alpha particle affect an entangled daughter nucleus?
- Trollfaz
- · Replies 3 ·
Graduate What are the probabilities of multiverses?
- Bibatshu Thapa
- · Replies 3 ·
High School What do physicists mean by the wave function being ontic or real?
- fanieh
- · Replies 10 ·
Graduate Bohr's solution to the EPR paradox
- PGaccount
- · Replies 100 ·
Undergrad Kinetic and Potential energy operators commutation
- Dinara
- · Replies 14 ·
Undergrad Photosynthesis and quantum randomness
- Atla2017
- · Replies 2 ·
Undergrad Does measurement change the energy of a system?
- arpon
- · Replies 2 ·
Undergrad Quantum mechanics and gravity of Greenberger
- exponent137
- · Replies 5 ·
Undergrad The symmetry argument and expectation value
- i_hate_math
- · Replies 6 ·
High School Why does lacking a position observable make photons less classical?
- zonde
- · Replies 20 ·
Undergrad Delayed choice experiment affecting the past
- Trollfaz
- · Replies 25 ·
Undergrad Is the Dimensionality of Vector Spaces the Same for Different Quantum States?
- arpon
- · Replies 1 ·
High School Are wave functions more real than state vectors in Hilbert space?
- fanieh
- · Replies 38 ·
Undergrad Is Wave-Particle Duality Still Relevant in Modern Physics?
- Dadface
- · Replies 90 ·
Undergrad Why is E not equal to p^2/2m for a particle in a box?
- Happiness
- · Replies 73 ·
High School What kind of difference would particles have?
- Lunct
- · Replies 10 ·
Undergrad Questions on Black Hole Entanglement and ER-Bridges
- Jaydwill10
- · Replies 12 ·
Undergrad Understanding QM Proof: Wavefunction in Orthonormal Eigenfunctions
- Silviu
- · Replies 3 ·
Undergrad Many measurements are not covered by Born's rule
- A. Neumaier
- · Replies 96 ·
High School Wave-particle-duality and the evolution of the universe
- Akriel
- · Replies 17 ·
Undergrad How a particle localized in half of a box changes over time
- Happiness
- · Replies 20 ·
Undergrad Size of an electron and Planck Volume.
- Arman777
- · Replies 12 ·
Undergrad Can superdense coding be achieved without quantum memory?
- Armchair
- · Replies 1 ·
High School Does the screen count as an observer in the double slit experiment?
- Trollfaz
- · Replies 3 ·
Undergrad Stationary states (The Bohr hydrogen atom)
- Erenjaeger
- · Replies 1 ·
High School Examples of systems that evolve deterministically
- Blue Scallop
- · Replies 13 ·
Graduate What's Your Answer To Dyson's Challenge
- bhobba
- · Replies 12 ·
Undergrad If there are gravitons, is space not curved?
- Pjpic
- · Replies 10 ·
High School What is the comparison between the Born rule and thermodynamics?
- Blue Scallop
- · Replies 95 ·
Undergrad How many electron positron pairs are created
- Admiller
- · Replies 8 ·
High School How do we know superposition exists?
- Lunct
- · Replies 12 ·
Graduate Counterfactual Transmission of Information
- cosmik debris
- · Replies 7 ·
Undergrad Why must the wave function be continuous in an infinite well?
- Happiness
- · Replies 18 ·
Insights Damped Motion in Classical and Quantum Mechanics - Comments
- hilbert2
- · Replies 21 ·
High School How to understand unitarity in QM?
- Grinkle
- · Replies 81 ·
Undergrad Emitting Photon and Energy Change
- Arman777
- · Replies 6 ·
High School Can the law of conservation of energy of be broken?
- Lunct
- · Replies 12 ·
Undergrad Spin and magnetic field of a photon
- Cecilie Glittum
- · Replies 58 ·
Undergrad What is the basic concept of the spin of a particle
- Pyrus
- · Replies 28 ·
Undergrad Does the Cosmos article accurately depict photon shape and wave functions?
- Ephemerality
- · Replies 1 ·
High School Absolute zero by definition is "nothing"
- GregoryC
- · Replies 6 ·
High School Speed of light or speed of causality?
- member 563992
- · Replies 9 ·
High School What is the significance of the Planck length in physics?
- Lunct
- · Replies 8 ·
Undergrad What are the units for the Heisenberg Uncertainty Principle?
- Lunct
- · Replies 4 ·
Undergrad One by one photon delay in double slit experiment
- hkonstas
- · Replies 2 ·