Explore the Quantum Coin Toss
Toss a quantum coin, put it in superposition, measure it and see interference bring it back to heads. Free, no signup, runs in your browser.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
See it in action
The Quantum Coin Toss with sample data entered and the result showing.
What is the Quantum Coin Toss?
Toss a quantum coin, put it in superposition, measure it and see interference bring it back to heads. It runs in your browser, so a change to a setting or a drag on an object shows up at once.
Quantum computers use qubits, superposition and interference to solve certain problems faster.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
A quantum coin can be heads and tails at once.
Measuring makes it pick one.
Amplitudes can be negative and cancel (interference).
Press H once and measure 100 times.
Press H twice and measure.
Press X after H and see what changes.
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 Coin Toss (Superposition) on the board, let students predict the result, then run it together and test this: Press H twice and measure. 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 superposition?
A quantum state that is a combination of two or more basic states at the same time.
What is a qubit?
The quantum version of a bit, which can be 0, 1 or a superposition of both.
Is the Quantum Coin Toss (Superposition) free to use?
Yes. The Quantum Coin Toss (Superposition) 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 Coin Toss (Superposition) work on a phone or tablet?
Yes. The Quantum Coin Toss (Superposition) takes touch input as well as mouse input, so you can drag its objects with a finger. A larger screen makes the controls and graphs easier to read.
How do I use the Quantum Coin Toss?
1. In the Quantum Coin Toss (Superposition), press "Quantum toss (H gate)", "Flip (X gate)", "Measure", "Reset to heads" to start, reset or change what is happening. 2. Start with this experiment: Press H once and measure 100 times. Drag any glowing handle, object or slider with your mouse or finger and the Quantum Coin Toss (Superposition) responds in real time. 3. Change one setting at a time and watch which readout moves, then compare it with this idea: A quantum coin can be heads and tails at once.
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Try the Quantum Coin Toss now
Toss a quantum coin, put it in superposition, measure it and see interference bring it. Free to use.
Try it free