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
Graduate Etracting ZPP from the vacuum is in violation of the 1st law of thermodynamics?
- jonnyk
- · Replies 2 ·
Graduate Understanding the Thermal Average of Operators in Quantum Mechanics
- Niles
- · Replies 3 ·
Graduate Mapping Points on the Bloch Sphere
- captainhampto
- · Replies 5 ·
Graduate What happens if two operators commute?
- Master J
- · Replies 2 ·
Graduate Attosecond Tomography and Elephants
- Joseph14
- · Replies 1 ·
Graduate How do we make sense of exponentiating an operator in quantum mechanics?
- Chopin
- · Replies 7 ·
Graduate Why in Quantum Mechanics is about energy but no force
- JayKo
- · Replies 14 ·
Graduate Interference pattern observed half-way into the formation
- avarmaavarma
- · Replies 1 ·
Graduate Are virtual photons and electron-positron pairs related in the polarized vacuum?
- TrickyDicky
- · Replies 1 ·
Graduate Does Collapsing a Wave Function Require Inputting Energy into a System?
- Kidphysics
- · Replies 27 ·
Graduate Symmetries in Quantum Mechanics
- LAHLH
- · Replies 12 ·
Graduate Questions concerning Delayed Quantum Eraser
- jgm340
- · Replies 7 ·
Graduate Why Must Annihilation Occur Between Particle and Corresponding Antiparticle?
- ndung200790
- · Replies 1 ·
Graduate What constitutes as a measurement?
- Qentanglement
- · Replies 8 ·
Graduate Time dependent perturbation theory
- jc09
- · Replies 1 ·
Graduate Energy levels for a different plancks constant
- bhsmith
- · Replies 14 ·
Graduate Density Matrix (pure state) Property
- Toten
- · Replies 3 ·
Graduate Understanding Schrödinger's Cat Experiment and the Many Worlds Interpretation
- lj19
- · Replies 37 ·
Graduate Planck's Inspiration to Solve Blackbody Radiation
- qbslug
- · Replies 21 ·
Graduate Commute Operators: Hi Niles - Find Out Now
- Niles
- · Replies 1 ·
Graduate Spin, Anti-matter and all that jazz.
- QEDrpf33
- · Replies 8 ·
Graduate How does interacting Lagrangian have form of product of fields?
- ndung200790
- · Replies 3 ·
Graduate Grover's Algorithm/Superposition?
- Bonham
- · Replies 1 ·
Graduate Who Can Apply the Operator on a Wave Function to Measure an Observable?
- Joscha
- · Replies 60 ·
Graduate Energy: Discrete or Continuous
- zlander79
- · Replies 1 ·
Graduate Basic question about how spin changes in time
- Turtle492
- · Replies 3 ·
Graduate Symmetry factors (Srednicki, figure 9.11)
- kexue
- · Replies 4 ·
High School If we saw x-ray waves could we see the inside of the objects?
- egerol1
- · Replies 3 ·
Graduate Quantization of Klein-Gordon Field
- go quantum!
- · Replies 3 ·
Graduate Weak Electron Interaction: Virtual Photon Effects?
- scope
- · Replies 6 ·
Graduate What is the significance of the E/M ratio in modern physics?
- sirous666
- · Replies 3 ·
Graduate Quantum Mechanics Questions: Superposition, Bohm Mechanics
- StevieTNZ
- · Replies 3 ·
Graduate Question about the uncertainty principle?
- zeromodz
- · Replies 1 ·
Graduate Puzzled about electromagnetic field behaving like oscillators
- commutator
- · Replies 1 ·
Graduate Srednicki Bar Notation: Understanding (39.8)
- LAHLH
- · Replies 18 ·
Graduate Pauli exclusion principle between 2 identical fermions
- scope
- · Replies 2 ·
Graduate What is the difference between left and right Weyl spinors in particle physics?
- paweld
- · Replies 6 ·
Graduate Why the discrepancy in muonic H Bohr radius? 285 fm or 256 fm?
- seattle.truth
- · Replies 3 ·
Graduate No uncertainty principle for scalar particles?
- scope
- · Replies 6 ·
Graduate Can anyone confirm the ground state Bohr radius for muonic hydrogen?
- seattle.truth
- · Replies 1 ·
Graduate Is There a Contradiction in Weinberg's QFT Book on Simultaneous Eigenstates?
- diraq
- · Replies 8 ·
Graduate Can Quantum Entanglement Solve the Mystery of Quantum Gravity?
- bassplayer142
- · Replies 5 ·
Graduate Wavefunction really like a wave?
- venton
- · Replies 3 ·
Graduate What Experiment Demonstrates the Particle Behavior of Electrons?
- bhsmith
- · Replies 3 ·
Graduate Spin-2 Particles & Representations of SO(3)
- kexue
- · Replies 3 ·
Graduate Understanding the Two Types of Density Operators in Quantum Mechanics
- Liao Chen
- · Replies 3 ·
Graduate Regarding normalization of the eigen basis vectors
- ashokanand_n
- · Replies 1 ·
Graduate Is Space Quantized in Electromagnetic Fields?
- jkg0
- · Replies 4 ·
Graduate Can I Calculate Traces and Cross Sections in QED Using Gamma Matrices?
- ha.dnri
- · Replies 1 ·
Graduate Understanding Pauli X Matrix in Z & X Bases
- quietrain
- · Replies 16 ·
Graduate Newton-Wigner operator for K-G filed
- paweld
- · Replies 1 ·
Graduate Solving the Dirac Equation for the Hydrogen Atom
- go quantum!
- · Replies 2 ·
Graduate An identity for functions of operators
- Identity
- · Replies 2 ·
Graduate Questions about the Photoelectric Effect
- Kidphysics
- · Replies 7 ·
Graduate Measuring one slit in double slit experiment
- cryptist
- · Replies 12 ·
Graduate Deep space Communication hypothetical question
- Panwasbipolar
- · Replies 10 ·
Graduate Can weak interaction be defined as a force related to distance between objects?
- Khrapko
- · Replies 5 ·
Graduate Understanding Matter Waves and the de Broglie Hypothesis in Quantum Physics
- TrickyDicky
- · Replies 12 ·
Graduate Worm Hole Idea: Electron talk at Great Distance
- freydawg56
- · Replies 1 ·
Graduate Equalities for Paulimatrix averages
- Funzies
- · Replies 1 ·
Graduate Annihilation Operators: Prove af(a^\dagger)|n>=df(a^\dagger)/da|0>
- Shadowz
- · Replies 18 ·
Graduate Could Centripetal Force Be the Key to Understanding Gravity?
- ForceBoson
- · Replies 4 ·
Undergrad Orbitals and Shells: Explained
- mariush
- · Replies 8 ·
Graduate Ryder, QFT, 1985, pg. 40, Eq. (2.69) K = sigma?
- Living_Dog
- · Replies 4 ·
Graduate Proving "If f is Simultaneously an Eigenfunction of L^2 & L_z
- Funzies
- · Replies 2 ·
Graduate Displacement operator for coherent states?
- Orbb
- · Replies 11 ·
Graduate The Hydrogen Atom (Schrodinger vs original Bohr theory)
- aheizler
- · Replies 1 ·
Graduate Wave Formula by complex analysis
- zerat2000
- · Replies 1 ·
Graduate Double Slit Experiment: Q&A on Photon Detection
- mitarbre
- · Replies 4 ·
Graduate Can Entangled Particles Still Show Interference in Quantum Experiments?
- feizex
- · Replies 1 ·
Graduate Deck of Cards and Planck Time?
- nicholasfouss
- · Replies 3 ·
Graduate Second Quantization: Explaining Creation/Annihilation Operator Transformation
- Niles
- · Replies 8 ·
Graduate Probability of finding a state
- quietrain
- · Replies 4 ·
Graduate Can't find that on the dictionary
- go quantum!
- · Replies 5 ·
Undergrad Maximum detectable wavelength of a photoresistor
- Rula
- · Replies 2 ·
Graduate Do Commuting Operators Always Share a Common Basis of Eigenvectors?
- Funzies
- · Replies 2 ·
Graduate Ryder: QFT: 1985: pp. 34-36: SU(2) and O(3)
- Living_Dog
- · Replies 7 ·
Graduate Is a Radio Wave Raser Feasible and How Would It Function?
- ChrisAndre
- · Replies 4 ·
Undergrad Energy Levels: What Happens if First Level Contains More Than 2 Electrons?
- ahiazaa
- · Replies 2 ·
Graduate Uncertainty principle and double-slit interference?
- xylai
- · Replies 40 ·
Graduate Quantum Mechanics - Ritz variational principle
- el_hijoeputa
- · Replies 2 ·
Graduate Decoherence over long distances - thought expt
- Karl Coryat
- · Replies 1 ·
Graduate Is QM Phase Inherently Relativistic?
- LarryS
- · Replies 5 ·
Graduate What means 'coherence' in quantum mechanics?
- go quantum!
- · Replies 2 ·
Graduate Wavefunction of Macroscopic Objects
- StevieTNZ
- · Replies 1 ·
Graduate Proving Unachievability of Absolute Zero: Uncertainty Principle
- Archosaur
- · Replies 4 ·
Graduate Entanglement and two particle system
- J.Asher
- · Replies 2 ·
The reality of the quantum world - article
- StevieTNZ
- · Replies 1 ·
Graduate Question about quantum superpostion
- Arsenal123
- · Replies 2 ·
Graduate Is the harmonic oscillator Hamiltonian an unbounded operator?
- AxiomOfChoice
- · Replies 5 ·
Graduate In principle limitations of hidden variable theories
- mjpam
- · Replies 13 ·
Graduate Entaglement and hidden variables
- andreab1987
- · Replies 68 ·
Graduate Optical Transitions: Free Info on Spontaneous Emission & Rabi Frequency
- sol66
- · Replies 1 ·
Graduate Adibatic Approx.(i.e., Born-Oppenheimer)
- R Van Camp
- · Replies 12 ·
Graduate What is a 'representation' in Field Theory
- robousy
- · Replies 7 ·
Graduate Is it possible a virtual photon is massive particle?
- ndung200790
- · Replies 13 ·
Graduate What does Wikkepedia mean when they talk about Quantum tunnelling
- Neopets
- · Replies 8 ·
Graduate The conjugate of a Wave-Function
- RCulling
- · Replies 2 ·
Graduate Why is psi equal to psi' in vector expressions in QM?
- Niles
- · Replies 2 ·
Graduate Composite Bosons: Understanding Their Behavior at Near Absolute Zero
- TrickyDicky
- · Replies 7 ·