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Quantum Physics Forum

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

I Question about discussions around quantum interpretations

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Quantum Eraser Experiment: Fact or Fiction?

Mar 25, 2013 · Replies 3 · Mar 30, 2013

Replies: 3

Views: 2K

Hydrogen Atoms and Spectral Lines

Mar 30, 2013 · Replies 4 · Mar 30, 2013

Replies: 4

Views: 2K

Is Quantum Mechanics saying we've already existed and will again?

Mar 30, 2013 · Replies 2 · Mar 30, 2013

Replies: 2

Views: 1K

Finite Potential Well Solutions

Mar 30, 2013 · Replies 1 · Mar 30, 2013

Replies: 1

Views: 2K

Can an Electron Be a Frame of Reference in Quantum Mechanics?

Mar 29, 2013 · Replies 6 · Mar 30, 2013

Replies: 6

Views: 3K

Is a wave function as complete as can be

Mar 30, 2013 · Replies 2 · Mar 30, 2013

Replies: 2

Views: 1K

Transmission and reflection coefficients

Mar 28, 2013 · Replies 2 · Mar 30, 2013

Replies: 2

Views: 2K

Why Does the Lone Electron in Silver Have Zero Orbital Angular Momentum?

Mar 30, 2013 · Replies 2 · Mar 30, 2013

Replies: 2

Views: 2K

What's the source of EM radiation

Mar 25, 2013 · Replies 34 · Mar 29, 2013

2

Replies: 34

Views: 5K

QHO Solutions: What is Imaginary Part?

Mar 29, 2013 · Replies 1 · Mar 29, 2013

Replies: 1

Views: 1K

Shouldn't the operator be applied to both the wf anD its modulus?

Mar 29, 2013 · Replies 2 · Mar 29, 2013

Replies: 2

Views: 1K

Time-energy uncertainty (question after reading FAQ)

Mar 29, 2013 · Replies 5 · Mar 29, 2013

Replies: 5

Views: 2K

Does Multiple Compton Scattering Occur in Laser-Electron Interactions?

Mar 25, 2013 · Replies 1 · Mar 29, 2013

Replies: 1

Views: 2K

Quantum Mechanics: Defining Dimensions

Mar 24, 2013 · Replies 14 · Mar 29, 2013

Replies: 14

Views: 3K

Interesting View Of Quantum Mechanics and The Measurement Problem

Mar 29, 2013 · Replies 2 · Mar 29, 2013

Replies: 2

Views: 2K

Creation and annihilation operators

Mar 27, 2013 · Replies 5 · Mar 28, 2013

Replies: 5

Views: 3K

How to understand current-density operator

Mar 28, 2013 · Replies 2 · Mar 28, 2013

Replies: 2

Views: 3K

Why is the Symmetry Group of the 9j Symbol Isomorphic to S_3 x S_3 x S_2?

Mar 28, 2013 · Replies 2 · Mar 28, 2013

Replies: 2

Views: 1K

In photoelectric effect mass reduce or increase ?

Nov 2, 2012 · Replies 5 · Mar 28, 2013

Replies: 5

Views: 2K

Understanding Spontaneous Symmetry Breaking in Quantum Field Theory

Mar 11, 2013 · Replies 3 · Mar 28, 2013

Replies: 3

Views: 2K

Harmonic Oscillator and Total Energy

Mar 27, 2013 · Replies 2 · Mar 28, 2013

Replies: 2

Views: 2K

The relation between atoms' kinetic energy and the energy levels

Mar 27, 2013 · Replies 5 · Mar 28, 2013

Replies: 5

Views: 3K

Bob makes a local gauge trans., can Alice undo with some fields?

Mar 26, 2013 · Replies 2 · Mar 27, 2013

Replies: 2

Views: 1K

LS coupling and calculating the total angular momentum

Mar 11, 2013 · Replies 1 · Mar 27, 2013

Replies: 1

Views: 3K

Zero point energy in thermal noise spectrum?

Mar 26, 2013 · Replies 4 · Mar 27, 2013

Replies: 4

Views: 3K

Callen & Welton calculation of power of absorption

Mar 25, 2013 · Replies 4 · Mar 27, 2013

Replies: 4

Views: 2K

Why does the integral of the Yukawa potential converge for q/alpha >= 1?

Mar 26, 2013 · Replies 4 · Mar 27, 2013

Replies: 4

Views: 6K

Easy question on conformal transformations

Jun 1, 2012 · Replies 6 · Mar 26, 2013

Replies: 6

Views: 5K

Time evolution of operators as projectors - confusion

Mar 25, 2013 · Replies 6 · Mar 26, 2013

Replies: 6

Views: 3K

Is the Electromagnetic Spectrum non-continuous?

Mar 20, 2013 · Replies 7 · Mar 26, 2013

Replies: 7

Views: 3K

Understanding Optical Modes Without the Jargon

Mar 25, 2013 · Replies 2 · Mar 26, 2013

Replies: 2

Views: 2K

Why can't we define a time related operator?

Mar 22, 2013 · Replies 30 · Mar 26, 2013

2

Replies: 30

Views: 5K

What Insights Do Paul Dirac's Lost 1975 Lectures Offer on Quantum Mechanics?

Mar 26, 2013 · Replies 1 · Mar 26, 2013

Replies: 1

Views: 2K

Math suggestions for learning QM

Mar 21, 2013 · Replies 4 · Mar 26, 2013

Replies: 4

Views: 3K

Help with Quantum Eraser experiments

Mar 25, 2013 · Replies 3 · Mar 26, 2013

Replies: 3

Views: 2K

Unified Field Theory - Consciousness

Mar 25, 2013 · Replies 4 · Mar 25, 2013

Replies: 4

Views: 3K

Perturbation Theory for a Hamiltonian

Mar 25, 2013 · Replies 2 · Mar 25, 2013

Replies: 2

Views: 1K

About the Lie algebra of our Lorentz group

Mar 25, 2013 · Replies 2 · Mar 25, 2013

Replies: 2

Views: 2K

The addition of the wave functions for a system

Mar 24, 2013 · Replies 3 · Mar 25, 2013

Replies: 3

Views: 2K

Unified Field Theory - Consciousness

Mar 25, 2013 · Replies 1 · Mar 25, 2013

Replies: 1

Views: 2K

Space as not empty, non-locality, conceptual implications?

Mar 16, 2013 · Replies 12 · Mar 25, 2013

Replies: 12

Views: 2K

Spin-1/2 Particle in Superposition B Field: Probability and Interactions

Mar 25, 2013 · Replies 1 · Mar 25, 2013

Replies: 1

Views: 2K

Full Rundown of Light as a Quantum

Mar 24, 2013 · Replies 4 · Mar 24, 2013

Replies: 4

Views: 1K

Why do all particles have a wavelength?

Mar 22, 2013 · Replies 6 · Mar 24, 2013

Replies: 6

Views: 3K

Normalization of SU(N) Group Generators

Mar 3, 2013 · Replies 10 · Mar 24, 2013

Replies: 10

Views: 5K

Matter vs Antimatter: Understanding the Disproportion

Mar 23, 2013 · Replies 3 · Mar 24, 2013

Replies: 3

Views: 2K

Eigenvalues of the position operator

Mar 21, 2013 · Replies 10 · Mar 24, 2013

Replies: 10

Views: 13K

Quantum mechanical derivation of Einstein's equations

Mar 24, 2013 · Replies 4 · Mar 24, 2013

Replies: 4

Views: 1K

Curved Dirac equation, Spin connection

Mar 22, 2013 · Replies 6 · Mar 23, 2013

Replies: 6

Views: 3K

What Are We Really Measuring in Quantum Mechanics?

Mar 22, 2013 · Replies 4 · Mar 23, 2013

Replies: 4

Views: 2K

Quick Matrix Element Question using Hermitian Operator

Mar 22, 2013 · Replies 6 · Mar 22, 2013

Replies: 6

Views: 2K

Dirac equation continuity issue

Mar 22, 2013 · Replies 1 · Mar 22, 2013

Replies: 1

Views: 2K

Does the ground state wave function in QM problems have any zeros?

Mar 16, 2013 · Replies 15 · Mar 22, 2013

Replies: 15

Views: 2K

Quantum Temperature Relations?

Apr 19, 2011 · Replies 5 · Mar 22, 2013

Replies: 5

Views: 3K

It would take a computer bigger than the universe to solve 11 electron

Mar 20, 2013 · Replies 8 · Mar 22, 2013

Replies: 8

Views: 2K

Question about H atom orbitals

Feb 13, 2013 · Replies 11 · Mar 22, 2013

Replies: 11

Views: 3K

Wave Function Units: |ψ(x,t)| - Dimensionless?

Mar 20, 2013 · Replies 5 · Mar 21, 2013

Replies: 5

Views: 5K

Unifying Gravity and Quantum Mechanics: The Role of Spin-2 Fields

Mar 20, 2013 · Replies 16 · Mar 21, 2013

Replies: 16

Views: 3K

Introducing V-Gauge & L-Gauge: A Brief Introduction

Mar 21, 2013 · Replies 1 · Mar 21, 2013

Replies: 1

Views: 1K

Intuition for symmetry currents

Feb 20, 2013 · Replies 3 · Mar 21, 2013

Replies: 3

Views: 2K

Understanding Spin: What is it & How is it Measured?

Mar 19, 2013 · Replies 18 · Mar 21, 2013

Replies: 18

Views: 3K

Knowledge and understanding of QM

Mar 14, 2013 · Replies 9 · Mar 21, 2013

Replies: 9

Views: 2K

Some weird integration by parts to derive momentum operator

Mar 20, 2013 · Replies 10 · Mar 21, 2013

Replies: 10

Views: 5K

Q's regarding atomic energy levels (1&2) and orbitals (1)

Mar 18, 2013 · Replies 8 · Mar 21, 2013

Replies: 8

Views: 2K

Can Two Electrons in an Atom Share the Same Quantum Numbers?

Mar 19, 2013 · Replies 4 · Mar 20, 2013

Replies: 4

Views: 2K

Does the adjoint of an outer product equal to itself?

Mar 20, 2013 · Replies 2 · Mar 20, 2013

Replies: 2

Views: 2K

Measurements in Quantum mechanics

Mar 20, 2013 · Replies 4 · Mar 20, 2013

Replies: 4

Views: 2K

Preferred direction about hydrogen atom

Mar 16, 2013 · Replies 5 · Mar 20, 2013

Replies: 5

Views: 2K

Changing the Hamiltonian to a new frame of reference

Mar 19, 2013 · Replies 1 · Mar 20, 2013

Replies: 1

Views: 2K

What are the recommended books for learning the basics of quantum mechanics?

Mar 16, 2013 · Replies 7 · Mar 20, 2013

Replies: 7

Views: 3K

Quantum Computing Help: Function Gates & Matrix Representation

Mar 18, 2013 · Replies 1 · Mar 20, 2013

Replies: 1

Views: 2K

Preparing for Quantum Mechanics, please suggest me good books.

Mar 19, 2013 · Replies 1 · Mar 19, 2013

Replies: 1

Views: 1K

Dirac Equation in (-,++++) Notation

Mar 19, 2013 · Replies 1 · Mar 19, 2013

Replies: 1

Views: 1K

Is predicting the future with Quantum Erasure possible?

Mar 18, 2013 · Replies 3 · Mar 19, 2013

Replies: 3

Views: 2K

Quantum Fluctuations: Virtual Photon in Feynman Diagrams

Mar 18, 2013 · Replies 2 · Mar 18, 2013

Replies: 2

Views: 2K

A question regarding the Power series method of solving the QHO

Mar 18, 2013 · Replies 2 · Mar 18, 2013

Replies: 2

Views: 2K

How Are General Relativity and Quantum Mechanics Connected?

Mar 15, 2013 · Replies 9 · Mar 18, 2013

Replies: 9

Views: 3K

Standing Waves in Bohr's Circular Orbit: Interference Explained

Mar 18, 2013 · Replies 1 · Mar 18, 2013

Replies: 1

Views: 2K

Quantum Mechanics, Potential Step

Nov 19, 2012 · Replies 1 · Mar 18, 2013

Replies: 1

Views: 2K

Phase of photon from excited atom

Mar 16, 2013 · Replies 5 · Mar 18, 2013

Replies: 5

Views: 2K

The photon, time and entropy

Mar 17, 2013 · Replies 16 · Mar 18, 2013

Replies: 16

Views: 3K

Understanding the Differences Between Integer and Fractional Spin Values

Mar 16, 2013 · Replies 5 · Mar 17, 2013

Replies: 5

Views: 2K

Casimir effect, where is the energy loss?

Mar 17, 2013 · Replies 3 · Mar 17, 2013

Replies: 3

Views: 3K

Is matrix mechanics better suited for relativity than wave mechanics?

Mar 8, 2013 · Replies 20 · Mar 17, 2013

Replies: 20

Views: 4K

SU(2) symmetry of the ammonia molecule?

Mar 15, 2013 · Replies 9 · Mar 17, 2013

Replies: 9

Views: 3K

Fluctuation-Dissipation Theorem and QED

Mar 14, 2013 · Replies 4 · Mar 17, 2013

Replies: 4

Views: 3K

Are grand unified theories the solution to the problem of multiple fields?

Mar 16, 2013 · Replies 4 · Mar 16, 2013

Replies: 4

Views: 2K

Is quantum entanglement - Continuous?

Mar 16, 2013 · Replies 1 · Mar 16, 2013

Replies: 1

Views: 1K

Is the Displacement Operator Tψ(x)=ψ(x+a) Hermitian?

Mar 15, 2013 · Replies 5 · Mar 16, 2013

Replies: 5

Views: 3K

Bohr's postulate: Electron not losing energy

Mar 15, 2013 · Replies 9 · Mar 16, 2013

Replies: 9

Views: 3K

Is the electron field a real thing?

Mar 15, 2013 · Replies 14 · Mar 16, 2013

Replies: 14

Views: 2K

Contracting operators in Wick diagrams

Mar 15, 2013 · Replies 8 · Mar 16, 2013

Replies: 8

Views: 3K

Arguments in favour of the fair sampling assumption

Mar 12, 2013 · Replies 8 · Mar 15, 2013

Replies: 8

Views: 2K

Spin,orbital and total angular momentum

Mar 14, 2013 · Replies 2 · Mar 15, 2013

Replies: 2

Views: 2K

String tension for quark anti-quark binding

Mar 14, 2013 · Replies 2 · Mar 15, 2013

Replies: 2

Views: 2K

Deriving Dirac Hamiltonian with (+,---) Metric Signature

Mar 13, 2013 · Replies 4 · Mar 14, 2013

Replies: 4

Views: 3K

Recommended math for 1st class in quantum

Mar 14, 2013 · Replies 7 · Mar 14, 2013

Replies: 7

Views: 1K

Momentum and wave vector representation

Mar 11, 2013 · Replies 4 · Mar 14, 2013

Replies: 4

Views: 2K

Is my understanding of EM field quantization correct?

Mar 14, 2013 · Replies 1 · Mar 14, 2013

Replies: 1

Views: 2K

What is a Photon? - Mass, Momentum, Speed & Wavelength

Mar 12, 2013 · Replies 2 · Mar 13, 2013

Replies: 2

Views: 2K

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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