Quantum Dot Barcode Code-Space Diagram

Real multiplexed diagnostic assays encode information optically: a microbead is loaded with a precise combinatorial ratio of several quantum-dot emission colors, turning it into a spectral barcode a detector can read alongside thousands of others in one pool. Rather than rendering a spatial field of beads, this 2D simulator plots the actual decoding problem directly — every bead's C-channel intensity ratio as a point in a compass/ternary code-space diagram, with the full combinatorial code set (capacity L^C − 1) shown as faint reference points. A live nearest-code decoder runs in the true C-dimensional fraction space on every noisy reading; adjust channel count and level count to grow the code space, dial in detector noise to model photon shot noise and spectral crosstalk, and watch tether lines stretch readings across decision boundaries into red misreads as codes pack closer together than the noise floor allows.