Home▸Quantum Computing▸EIT Quantum Memory — Write, Store, Read Out a Photon

EIT Quantum Memory — Write, Store, Read Out a Photon

Store a photonic qubit's quantum state in an atomic ensemble via Electromagnetically Induced Transparency: prepare a Bloch-sphere input state, write it into the ensemble by switching off the control laser, hold it for an adjustable storage time, then read it back out and watch retrieval fidelity decay with storage duration.

Quantum Computing3DAdvanced60 FPS

Details

CategoryQuantum Computing

RenderingThree.js · WebGL

DifficultyAdvanced

Target FPS60

Controlsθ/φ sliders prepare the input photon's Bloch-sphere state; Write photon in launches it toward the atomic ensemble and stores it when the control beam switches off; target storage-time slider sets how long the excitation is held (auto reads out when reached); Read out now interrupts storage early; live theoretical and measured fidelity readouts plus a fidelity-vs-storage-time chart; Reset memory clears the cycle; drag to orbit the 3D view.

EITelectromagnetically induced transparencyquantum memoryatomic ensemblephoton storageBloch sphereretrieval fidelitydecoherence

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Prepare an incoming photon's polarization state on the Bloch sphere, then write it into a cloud of atoms by switching off the control laser (Electromagnetically Induced Transparency). Hold the resulting collective excitation for an adjustable storage time, then read it back out as an outgoing photon and compare its Bloch vector against the original — watch the retrieval fidelity decay the longer the state sits in storage.

⚙ Under the hood

Prepare a photon's quantum state on the Bloch sphere and write it into a cloud of atoms via Electromagnetically Induced Transparency: switch the control laser off to store the state as a collective atomic excitation, hold it for an adjustable duration, then switch the control beam back on to read out an outgoing photon and watch retrieval fidelity decay with storage time.

EITelectromagnetically induced transparencyquantum memoryatomic ensemblephoton storageBloch sphereretrieval fidelitydecoherence

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install