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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

Insights Why Entangled Photon-Polarization Qubits Violate Bell’s Inequality
A Electron frequency components during orbital tunneling
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A Dirac Propagator: Learn to Reach 8.2
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A Quantum biology - photosynthesis
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A Annihilation creation operators in case of half H.oscillator
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A What is the Corrected Heisenberg Limit for Phase Estimation Measurements?
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A Diagonalization of 2x2 Hermitian matrices using Wigner D-Matrix
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A Two Different Fock State Inputs into a Beam Splitter
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A S-matrix expansion and Wick's theorem
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A Photoelectric effect at metal junctions
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A Complex Numbers Not Necessary in QM: Explained
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A Understanding Harmonic oscillator conventions
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A Unitary representations of Lie group from Lie algebra
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A The cnot with outer product control qubit
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A Dirac Field quantization and anti-commutator relation
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A First Chip-to-Chip Quantum Teleportation
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A Does Dim Reg really avoid a photon mass?
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A Measurements of multipartite entanglement
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A Trace of a product of Dirac Matrices in a Fermion loop
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A Vacuum energy density after spontaneous symmetry breaking
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A The probability of finding R out of N bosons in one half of a volume
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A Classical limit of the propagator
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A Fermion mass terms in Peskin and Schroeder's book
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A Vibrational relaxation through electron-hole pairs
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A Stuck on evaluating this functional determinant
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A Expectation Value of a Stabilizer
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A Constructive QFT - current status
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A Vector and Axial vector currents in QFT
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A Gauge Invariance of the Schrodinger Equation
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A Reading canonical commutation relations from the action (QHE)
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A E-writing Action on a different slice of space-time, Quantum Hall Effect
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A Qubit Energy Level Required to be Unevenly Separated
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A What Is the Renormalized Gluon Dressing Function?
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A What Are the Key Insights into Electron Triplet States in Quantum Physics?
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A QHE ' the effective action should be a local functional'
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A QHE: rotational invariance, no terms linear in E or B
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A Is there a quantum uncertainty to the number of atoms in a marble?
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A Classical fields: EM fields vs. Gravitational fields
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A Can I get electronic copies of the original QM papers?
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A Four spin 1/2 particles at the Vertices of tetrahedron
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A Time-dependent unitary transformations of the Hamiltonian
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A Canonical momentum ##\pi^\rho## of the electromagnetic field
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A Solving Spin-Spin Interaction for Total Spin Commutation
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A Fractional Quantum Hall Effect- degeneracy of ground state (Tong's notes)
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A Kubo Formula Deriviation - interaction picture, complete eigenbasis
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A Does The Use Of The Zeta Function Bypass Renormalization
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A Volume Element for Isotropic Harmonic oscillator
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A Measuring Deflection of Star Light During Eclipse: Separating Space-Time Effects
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A About Glauber's formula(or special Baker–Campbell–Hausdorff
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A Spin change of Fermions and quantum energy spectrum
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A Is renormalization the ideal solution?
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A Hamiltonian background magnetic field, perturbed by electric field
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A Time Dependent Perturbation of Harmonic Oscillator
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A What is the definition of 'ground state',considering H- ion = -14.35eV
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A Fock spaces and inequivalent ccr representations
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A Overlap of nth QHO excited state and momentum-shifted QHO ground state
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A Difference between russel-saunders-coupling and spin-orbit-coupling
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A Measurements and electroweak gauge invariance/transformations
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A What is the solution for two electrons on a sphere?
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A Canonical quantization of Electrodynamics: physical intuition ?
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A Increase of coherent length in stimulated emission
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A Conservation of Quantum Information
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A How do entanglement experiments benefit from QFT (over QM)?
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A Extra terms in the Action in Zee chapter 1.3?
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A Do the time and normal ordering operators commute?
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A Gauge breaking and Faddeev-Popov ghost particles
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A What is the explanation behind loops as O(h) corrections in tree level diagrams?
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A Bosonic Field operator in this exponential
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A Theoretical status of the Landauer Principle
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A Derivative of a Lorentz-Transformed Field
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A Can Work Be Defined for a Quantum System with a Time-Dependent Hamiltonian?
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A Correlation functions of quantum Ising model
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A Understanding a sequence in P&S
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A Regarding Coleman's Sine-Gordon Duality
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A Bosonization Formula and its Effects on Fermion Number
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A Can decoherence be associated with heat generation?
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A Simultanious eigenstate of Hubbard Hamiltonian and Spin operator in tw
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A How far can one change a model before it leaves the universality class
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A Is the Landau pole in QED an artifact of perturbative methods?
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A Creation/annihilation operators and trigonometric functions
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A Understanding the Charge Distribution at the Metal-Semiconductor Interface
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A Find Reduced Mass for Polyatomic Molecules
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A Confusion about 2016 Unruh paper - fluctuating vacuum energy density?
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A Is the Berry connection compatible with the metric?
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A Particle production in 1+1D QFT
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A Proof - gauge transformation of yang mills field strength
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A Collapse in QM: in conflict with SR?
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A Massive gauge bosons in QFT in/out states
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A Does Quantum Mechanics Embrace Symmetry and Causality?
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A Explicit form of annihilation and creation operators for Dirac field
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A How Does Quantum Field Theory Preserve Causality?
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A Understanding time invariant of EM
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A How can we derive the results that we know about QM from QED?
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A QED Bound States: Weinberg's Explanation & Breakdown
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A Is quantum theory a microscopic theory?
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A Representation of Super-Quantum probability
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A Matrix transmission coefficient
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A How can infrared divergences in the fermion propagator be cured in QED?
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A What does the first ever photo of quantum entanglement look like?
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A Is time irrelevant in quantum mechanics?
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A Tensor and vector product for Quantum
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Quantum Physics

Quantum physics, or quantum mechanics, is a branch of physics that explores the behavior of matter and energy at the smallest scales, where classical physics principles break down. It introduces the concept of quantization, suggesting that certain properties, such as energy levels, are quantized and can only exist in discrete values.

Quantum mechanics encompasses wave-particle duality, where particles like electrons exhibit both wave and particle characteristics. The theory is probabilistic, relying on probability amplitudes to predict outcomes, and features phenomena like superposition, where particles can exist in multiple states simultaneously.

Quantum physics has transformed our understanding of the microscopic world, leading to technologies like transistors and lasers, and continues to provoke profound questions about the nature of reality and the role of observation in shaping it.

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