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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

Help me understand indeterminism in standard quantum mechanics

57 minutes ago

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Graduate What Causes Divergences in QFT?

Mar 26, 2006 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 2K

Graduate Double Slit - Post Incident Detection

Feb 9, 2012 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Defining Spin in QFT in Curved Spacetime

Mar 20, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Treating the Observer as a Quantum Object: Implications and Considerations

Jun 21, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Conventional renormalization to order in the coupling or loops?

Jun 1, 2013 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Superrenormalizable phi cubed theory

Mar 10, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate What is the true meaning of weak measurements in quantum mechanics?

Aug 28, 2014 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Estimating size of loop integrals

Jun 22, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate What Are the Limitations of Multiplying Delta Functions in Quantum Mechanics?

Nov 29, 2004 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Asymptotic perturbation theory

Aug 20, 2014 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate How is Euclideanization of Path Integrals Justified in Quantum Field Theory?

Dec 29, 2008 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Hans Dehmelt's Refutation of Bohr's Claim: The Impossible Made Possible

Jan 13, 2005 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate The Quantum field’s effect on Virtual Particles

Feb 22, 2013 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Quantum states as L^2 functions

Jan 1, 2009 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Perturbation theory - need a couple of articles

Sep 4, 2011 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Wigners Friend where is the paradox?

Mar 21, 2010 · Replies 3 · Apr 17, 2019

Replies: 3

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Graduate Renormalization and divergences

Dec 15, 2005 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Extending Shannon's Ideas: The Evolution of Information in Quantum Mechanics

Oct 24, 2008 · Replies 1 · Apr 17, 2019

Replies: 1

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Undergrad What is the Basis of a Composite System?

Apr 12, 2019 · Replies 12 · Apr 17, 2019

Replies: 12

Views: 3K

Graduate Entropy of Reeh-Schlieder correlations

Apr 15, 2014 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate The Pauli Principle and the Wavefunction of Two Particles in a Ring

Jan 6, 2012 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate What is non/perturbative vacuum

Mar 24, 2006 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Variational Principle on First Excited State

Nov 28, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate Path Integrals and Non-Abelian Gauge Theories

Apr 28, 2007 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate What Properties Can Become Entangled When Atoms Interact?

Nov 25, 2007 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Standard perturbation theory - what exactly is meant?

May 24, 2008 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Are van der Waals forces the fundamental basis for the Casimir effect?

Mar 17, 2009 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Spectroscopy and Russell-Saunders coupling

Oct 28, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Difference between a classical and quantum field theory?

Mar 6, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 7K

Graduate Solving S.E. for rigid rotor (asymmetric top)

May 12, 2007 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate Planck's assumption and Uncertainty principle

Feb 26, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Is the Källen-Lehmann Representation a Feature of Quantum Field Theory?

Jan 29, 2006 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 6K

Graduate Tracking Photons in a Double Slit Experiment

Jun 4, 2011 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate Heisenberg's & Schrodinger's Picture

Mar 25, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Wave packet vs relative probability

Jan 20, 2007 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Size matters but so does shape.

Oct 20, 2003 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Relation between condensed matter physics and QFT

Jan 26, 2007 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Inner product of signals (or wavefunction)

Jan 16, 2009 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate What does simultaneous reality and non-commuting operators mean?

Nov 15, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 4K

Graduate Is E=3/2 Kb T or E=Kb T?

Nov 14, 2011 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate Question on Russell-Saunders term Symbols

Sep 14, 2011 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate Larmor Frequency spin, orbital or total angular momentum?

Feb 2, 2011 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 4K

Undergrad Where do the free electrons go and how do I find the energy level?

Aug 19, 2008 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate Cloud Chambers and The Double Slit

May 11, 2006 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Wave function of two different fermions

Apr 19, 2014 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate What Are the Different Ways Particles Can Occupy Energy Levels in Systems?

Feb 21, 2011 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Undergrad What are vibrational levels and energy states?

Dec 9, 2011 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 5K

Undergrad What are the Best Michio Kaku Books on Wormholes, Black Holes, and Time Travel?

Dec 28, 2011 · Replies 16 · Apr 17, 2019

Replies: 16

Views: 4K

Graduate Reference to a peer reviewed paper

Dec 11, 2007 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 3K

Graduate Questions on Quantum Numbers (introductory physics)

Dec 10, 2010 · Replies 1 · Apr 17, 2019

Replies: 1

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Graduate Quantum synchronization in a cavity

Apr 10, 2019 · Replies 1 · Apr 17, 2019

Replies: 1

Views: 2K

Undergrad How to derive the energy of a parabolic confining potential in a wire

Apr 15, 2019 · Replies 9 · Apr 16, 2019

Replies: 9

Views: 2K

Graduate Lundeen Steinberg claim to resolve Hardy paradox

Jan 15, 2009 · Replies 2 · Apr 16, 2019

Replies: 2

Views: 4K

Graduate Hawking Radiation and Black Hole Evaporation

Jan 9, 2007 · Replies 1 · Apr 16, 2019

Replies: 1

Views: 4K

Graduate Degeneracy of the Quantum Linear Oscillator

Feb 9, 2011 · Replies 1 · Apr 16, 2019

Replies: 1

Views: 4K

Graduate Accelerated electron photon emission

Feb 15, 2009 · Replies 1 · Apr 16, 2019

Replies: 1

Views: 3K

Graduate How can I create polar plots of spherical harmonics?

Aug 22, 2011 · Replies 1 · Apr 16, 2019

Replies: 1

Views: 4K

Graduate How Does the Rotating Wave Approximation Simplify the Density Matrix Evolution?

May 17, 2009 · Replies 1 · Apr 16, 2019

Replies: 1

Views: 4K

Graduate 'Genuine Decoherence' and Macroscopic Superposition

Mar 10, 2012 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 2K

Undergrad Two Basic Blackbody Radiation quesions

Jan 1, 2009 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 2K

Graduate Doube slit electron with single slit photon emitter and detector

Dec 7, 2009 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 4K

Graduate Has Computer Simulation Proven Successful in Solving Quantum Mechanical Systems?

Jan 13, 2008 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 3K

Graduate Matter waves as standing waves

Sep 5, 2008 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 4K

Graduate Maximizing Bounces in Quantum Ping Pong Ball Collisions | Brain Teaser

Sep 7, 2004 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 4K

Graduate Talbot Lau interferometry of carbon-70 fullerenes

Sep 7, 2004 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 5K

Graduate Spin - overlapping photons with opposite spin

Sep 10, 2007 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 4K

Undergrad How to predict the frequency of NMR spectrum

May 9, 2008 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 5K

Graduate What is the ground state wave function of ortho-helium and its degeneracy?

Apr 7, 2010 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 6K

Graduate Unraveling the Mystery of Elementary Questions in Quantum Mechanics

Jun 27, 2006 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 5K

Graduate Electron spin and conservation of angular momentum

Apr 25, 2005 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 5K

Graduate Quantum computing - bloch sphere coordinates

Feb 23, 2007 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 6K

Graduate How are the excitation energies of helium determined experimentally?

Apr 24, 2007 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 7K

Graduate Calculating Fermi Energy for Neutrons Confined to a Nucleus

May 3, 2009 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 8K

Graduate Scattering theory - phase shift - best approx.

Jun 15, 2005 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 6K

Graduate How to create good quantum states from good quantum numbers?

Mar 19, 2005 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 8K

Undergrad Definition of a symmetry transformations in quantum mechanics

Apr 14, 2019 · Replies 4 · Apr 15, 2019

Replies: 4

Views: 2K

Undergrad No problem, happy to help! Good luck with your studies.

Apr 13, 2019 · Replies 3 · Apr 15, 2019

Replies: 3

Views: 2K

Graduate Does Antony Valentini's "sub-quantum measurement" really work?

Apr 15, 2019 · Replies 1 · Apr 15, 2019

Replies: 1

Views: 2K

Undergrad Can Quantized Momentum Transfer Explain Double-Slit Interference Patterns?

Mar 18, 2019 · Replies 5 · Apr 15, 2019

Replies: 5

Views: 2K

Undergrad Is the Chirality Projection Operator Misused in This Scenario?

Apr 14, 2019 · Replies 1 · Apr 14, 2019

Replies: 1

Views: 4K

Graduate The uncertainty principle in quantum gravity

Apr 14, 2019 · Replies 1 · Apr 14, 2019

Replies: 1

Views: 1K

Graduate Is the Counterfactual Argument for Locality and Realism Flawed?

Apr 11, 2019 · Replies 11 · Apr 14, 2019

Replies: 11

Views: 3K

Graduate Tsirelson bound and mixed states.

Apr 14, 2019 · Replies 1 · Apr 14, 2019

Replies: 1

Views: 1K

High School Interference of Light in the Double-Slit Experiment

Apr 13, 2019 · Replies 24 · Apr 14, 2019

Replies: 24

Views: 2K

Graduate Quantum Harmonic Oscillator: Negative Kinetic Energy Question.

Sep 16, 2009 · Replies 1 · Apr 14, 2019

Replies: 1

Views: 6K

Graduate Solving Degeneracy Equation: General Formula & More

Sep 6, 2004 · Replies 1 · Apr 14, 2019

Replies: 1

Views: 6K

Graduate Potential barrier, wave function, and probability

Feb 10, 2007 · Replies 1 · Apr 14, 2019

Replies: 1

Views: 6K

Undergrad Definition of the potential energy operator

Apr 13, 2019 · Replies 4 · Apr 13, 2019

Replies: 4

Views: 3K

Undergrad Physical Significance/Interpretation of Angular Wave Number.

Mar 21, 2010 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 7K

Graduate Understanding Black Hole Evaporation with Hawking Radiation

Feb 26, 2010 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 2K

Graduate Hawking radiation and negative gravitational charge

Nov 28, 2011 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 2K

Graduate How Do Spin-1 Particles Behave in Stern-Gerlach Experiments?

Dec 31, 2010 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 2K

Graduate Covalent bonding has limited range?

Jun 3, 2005 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 2K

Graduate Transmission Coefficient of a Rectangular Square Potential Barrier

Mar 23, 2010 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 5K

Graduate Dual particle and dual double slit interference

Aug 11, 2012 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 2K

Graduate Mesons Violate Bell's Inequality?

Nov 19, 2003 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 3K

Graduate How to calculate the photon flux of monochromatic light?

Sep 3, 2014 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 3K

Graduate Discover Ne^9 Energy Levels Using NIST Database - Missing Values?

Jan 27, 2013 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 2K

Graduate Time period measured in double slit experiment

Apr 29, 2010 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 3K

Graduate Can magnetism exist outside of any non-inertial motion, such as spin?

Oct 28, 2011 · Replies 1 · Apr 13, 2019

Replies: 1

Views: 1K

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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