Explore the Quantum Measurement: Stern-Gerlach Experiment
Send spin particles through analyzers along Z and X and see how measurement changes the state. Free, no signup, runs in your browser.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Illustration. Open the tool for the real thing.
See it in action
The Quantum Measurement: Stern-Gerlach Experiment with sample data entered and the result showing.
What is the Quantum Measurement: Stern-Gerlach Experiment?
Send spin particles through analyzers along Z and X and see how measurement changes the state. It runs in your browser, so a change to a setting or a drag on an object shows up at once.
Spin measurements are the basis of MRI, quantum computing and magnetic storage.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Spin can be measured up or down along any direction.
Measuring along the same direction again gives the same answer.
Measuring along a different direction gives 50/50.
Set Z then Z and check results agree.
Set Z, X, Z and see 50/50.
Fire many particles.
Used for
Pick one to see how it fits.
Atomic & Quantum learners
Advanced high-school and university students in chemistry and physics, and curious learners who want to see how the atomic world behaves.
Try it freeTeachers
For teachers: project the Quantum Measurement: Stern-Gerlach Experiment on the board, let students predict the result, then run it together and test this: Set Z, X, Z and see 50/50. For students: change one thing at a time and write down what changes.
Try it freeHow it compares
A plain look at this tool next to the usual alternative.
| This simulation | Textbook diagram | |
|---|---|---|
| Interactive | Drag, tap and change settings | Fixed picture |
| Install | Nothing to install | Not needed |
| Cost | Free to use | Depends on the book |
Questions people ask
What is the Stern-Gerlach experiment?
An experiment that splits a beam of particles by their spin using a magnetic field.
Why does Z, X, Z give random results?
The X measurement destroys the earlier Z information.
Is the Quantum Measurement: Stern-Gerlach Experiment free to use?
Yes. The Quantum Measurement: Stern-Gerlach Experiment is free, needs no signup or download and runs in your web browser. It is part of the Atomic & Quantum group of AZRS simulations.
Does the Quantum Measurement: Stern-Gerlach Experiment work on a phone or tablet?
Yes. The Quantum Measurement: Stern-Gerlach Experiment takes touch input as well as mouse input, so you can use its 3 adjustable settings with a finger. A larger screen makes the controls and graphs easier to read.
How do I use the Quantum Measurement: Stern-Gerlach Experiment?
1. In the Quantum Measurement: Stern-Gerlach Experiment, use the controls to change Analyzer 1, Analyzer 2, Analyzer 3. The simulation reacts instantly. 2. In the Quantum Measurement: Stern-Gerlach Experiment, pick an option such as Z, X, off to switch modes or load an example. 3. In the Quantum Measurement: Stern-Gerlach Experiment, press "Fire 200 particles", "Clear counts" to start, reset or change what is happening. 4. Start with this experiment: Set Z then Z and check results agree. Drag any glowing handle, object or slider with your mouse or finger and the Quantum Measurement: Stern-Gerlach Experiment responds in real time. 5. Change one setting at a time and watch which readout moves, then compare it with this idea: Spin can be measured up or down along any direction.
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Send spin particles through analyzers along Z and X and see how measurement changes the. Free to use.
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