Quantum measurement

Wave function collapse

In quantum mechanics, wave function collapse occurs when a wave function—initially in a superposition of several eigenstates—reduces to a single eigenstate due to interaction with the external world. This interaction is called an observation, and is the essence of a measurement in quantum mechanics, which connects the wave function with classical observables such as position and momentum. Collapse is one of the two processes by which quantum systems evolve in time; the other is the continuous evolution governed by the Schrödinger equation. Collapse is a black box for a thermodynamically irreversible interaction with a classical environment. Calculations of quantum decoherence show that when a quantum system interacts with the environment, the superpositions apparently reduce to mixtures of classical alternatives. Significantly, the combined wave function of the system and environment continue to obey the Schrödinger equation throughout this apparent collapse. More importantly, this is not enough to explain actual wave function collapse, as decoherence does not reduce it to a single eigenstate. Historically, Werner Heisenberg was the first to use the idea of wave function reduction to explain quantum measurement. (Wikipedia).

Video thumbnail

Why Quantum Mechanics Makes No Sense (But Still Works) - Collapse of the Wave Function (Parth G)

Go to Squarespace.com for a free trial, and when you’re ready to launch, go to http://www.squarespace.com/parthg to save 10% off your first purchase of a website or domain. #collapseofthewavefunction #wavefunctioncollapse #copenhageninterpretation The concept of "wave function collapse",

From playlist Quantum Physics by Parth G

Video thumbnail

Coding Challenge 171: Wave Function Collapse

Straight out of quantum mechanics, Wave Function Collapse is an algorithm for procedural generation of images. https://thecodingtrain.com/challenges/171-wave-function-collapse In this video (recorded over 3 live streams) I attempt the tiled model and explore a variety of solutions to the

From playlist Coding Challenges

Video thumbnail

Quantum Wave Function Visualization

Superposition, wave function collapse, and uncertainty principle in Quantum Physics. Shows real & imaginary components of quantum wave functions for free particles and confined particles. My Patreon page is at https://www.patreon.com/EugeneK

From playlist Physics

Video thumbnail

The Wave Function

An explanation for the general choice of wave function to describe a particle in quantum mechanics

From playlist Quantum Mechanics

Video thumbnail

Traveling wave, a failed simulation

It failed because of a bad choice of parameters. http://calculus123.com

From playlist Physics simulations

Video thumbnail

Evgenii Kuznetsov: ​​Solitons vs collapses

Abstract: This talk is devoted to solitons and wave collapses which can be considered as two alternative scenarios pertaining to the evolution of nonlinear wave systems describing by a certain class of dispersive PDEs (see, for instance, review [1]). For the former case, it suffices that t

From playlist Mathematical Physics

Video thumbnail

How to Normalize a Wave Function (+3 Examples) | Quantum Mechanics

In quantum mechanics, it's always important to make sure the wave function you're dealing with is correctly normalized. In this video, we will tell you why this is important and also how to normalize wave functions. Contents: 00:00 Theory 01:25 Example 1 03:03 Example 2 05:08 Example 3

From playlist Quantum Mechanics, Quantum Field Theory

Video thumbnail

The LAST STEP in QUANTUM MECHANICAL Wave Function Calculations | Normalization of the Wave Function

A wave function is meaningless unless it is normalised (or normalized, for the US lot). In my video discussing how to solve the Schrodinger Equation (found here: https://www.youtube.com/watch?v=sPZWtZ8vt1w) we saw that the wave function for a particular system could be found by solving th

From playlist Quantum Physics by Parth G

Video thumbnail

Collapse models and spacetime symmetries by Daniel Bedingham

21 November 2016 to 10 December 2016 VENUE Ramanujan Lecture Hall, ICTS Bangalore Quantum Theory has passed all experimental tests, with impressive accuracy. It applies to light and matter from the smallest scales so far explored, up to the mesoscopic scale. It is also a necessary ingredie

From playlist Fundamental Problems of Quantum Physics

Video thumbnail

Trapped Quantum Particles

Explanation of why the wavefunction for a trapped quantum particle looks different than the wavefunction for a particle moving freely through space. My Patreon page is at https://www.patreon.com/EugeneK

From playlist Physics

Video thumbnail

Quantum Physics – list of Philosophical Interpretations

Explanation of the various interpretations of Quantum Mechanics. My Patreon page is at https://www.patreon.com/EugeneK 00:00 Introduction 00:29 Copenhagen Interpretation 02:08 Objective Collapse 04:41 EPR Paradox 06:11 Retro-Causality 07:28 Transactional Interpretation 10:25 Super-Determ

From playlist Physics

Video thumbnail

The measurement problem and some mild solutions by Dustin Lazarovici (Lecture - 02)

21 November 2016 to 10 December 2016 VENUE Ramanujan Lecture Hall, ICTS Bangalore Quantum Theory has passed all experimental tests, with impressive accuracy. It applies to light and matter from the smallest scales so far explored, up to the mesoscopic scale. It is also a necessary ingredie

From playlist Fundamental Problems of Quantum Physics

Video thumbnail

The measurement problem and some mild solutions by Dustin Lazarovici ( Lecture - 01)

21 November 2016 to 10 December 2016 VENUE Ramanujan Lecture Hall, ICTS Bangalore Quantum Theory has passed all experimental tests, with impressive accuracy. It applies to light and matter from the smallest scales so far explored, up to the mesoscopic scale. It is also a necessary ingredie

From playlist Fundamental Problems of Quantum Physics

Video thumbnail

When Quantum Physics and Relativity Compete Against Each Other to Keep Stars From Collapsing

Go to Squarespace.com for a free trial, and when you’re ready to launch, go to http://www.squarespace.com/parthg to save 10% off your first purchase of a website or domain. #degeneracypressure #quantum #neutronstar In this video, we'll be looking at degeneracy pressure - a quantum mecha

From playlist Quantum Physics by Parth G

Video thumbnail

The Interpretations of Quantum Mechanics

An introduction to the Interpretations of Quantum Mechanics. The first 500 people to sign up via my link will get two FREE months of Skillshare Premium: https://skl.sh/domainofscience The interpretations of quantum physics are a collection of attempts of many physicists to try and make qua

From playlist The Map of Quantum Physics Expanded

Video thumbnail

Dynamical Reduction in General Relativistic Contexts by Daniel Sudarsky

21 November 2016 to 10 December 2016 VENUE Ramanujan Lecture Hall, ICTS Bangalore Quantum Theory has passed all experimental tests, with impressive accuracy. It applies to light and matter from the smallest scales so far explored, up to the mesoscopic scale. It is also a necessary ingredie

From playlist Fundamental Problems of Quantum Physics

Video thumbnail

Waves 6_3 Doppler Effect

Solution to problems dealing with the Doppler effect.

From playlist Physics - Waves

Video thumbnail

Using Computational Essays to Demystify Quantum Mechanics

To learn more about Wolfram Technology Conference, please visit: https://www.wolfram.com/events/technology-conference/ Speaker: Mohammad Bahrami Wolfram developers and colleagues discussed the latest in innovative technologies for cloud computing, interactive deployment, mobile devices,

From playlist Wolfram Technology Conference 2018

Related pages

Quantum Zeno effect | Schrödinger equation | Absolute value | Ensemble interpretation | Schrödinger's cat | Measurement problem | Probability | Kronecker delta | Density matrix | Momentum | Projective space | Relational quantum mechanics | Dirac equation | Copenhagen interpretation | Many-worlds interpretation | C*-algebra | John von Neumann | Interpretations of quantum mechanics | Probability amplitude | Transactional interpretation | Unitary transformation | Uncertainty principle | Stern–Gerlach experiment | Von Neumann–Wigner interpretation | Linear combination | Complex conjugate | Basis (linear algebra) | Consistent histories | Hilbert space | Time evolution | Measurement in quantum mechanics | Vector projection | Bra–ket notation | Second law of thermodynamics | Arrow of time | Free particle | Quantum decoherence