SpinDrops

SpinDrops

An interactive quantum spin simulator with full visualization of spin operator dynamics using the DROPS representation.

Documentation Download Try in Browser

Current release: v2.2.0

DROPS Visualization

See the complete quantum state of multi-spin systems using the Discrete Representation of Operators for Spin Systems.

Pulse Sequence Simulation

Load, edit, and simulate NMR/ESR pulse sequences in real time. Watch the spin dynamics unfold step by step.

Sequence Optimization

Optimize pulse sequences with gradient descent, conjugate gradient, or interior-point methods. Design robust broadband pulses.

Ensemble Support

Simulate ensembles of spin systems with varying offsets, couplings, and relaxation to study robustness and design tolerant sequences.

Cross-Platform

Runs on iOS, Android, macOS, Linux, Windows, and in the browser. Same simulation engine everywhere.

Open & Free

Free for research and education. Developed at the Technical University of Munich by the Glaser Group.

Get Started

Read the tutorial, browse the manual, or jump into the examples and challenges.