Electricity Reads Out Diamond Spins ⚡ экспресс
Imagine: a quantum state is stored like a hidden image, then 'developed' with an electrical signal. This trick was pulled off with defects in diamond (quantum bits): instead of collecting rare flashes of light, spin information is transferred to long-lived charge traps. This paves the way for compact quantum devices—like digital film development.
Quantum computers demand reliable memory. In a diamond crystal — carbon — information is stored as the orientation of microscopic magnetic needles (spins) at special defects. Reading these arrows with light was inconvenient: optics are bulky for chips. The new method works like developing photographic film.
First, the laser “exposes” the spin: if the arrow points one way, the defect ejects an electron into a microscopic trap at the diamond’s edge; if the other way, it doesn’t. The charge can sit there for hours. Then, by applying voltage and shining light again, the traps are shaken — and the collected electrons create a current pulse. The magnitude of this photocurrent reveals the original spin direction. The method, called CCDMR (magnetic resonance with charge capture), is entirely electrical: no need to catch faint flashes. It can be easily placed on a crystal, creating quantum chips the size of a fingernail.
🎯 Electron traps in diamond are so stable that the charge stored in them can last for years — far longer than most laboratory instruments operate.
🎬 The idea of storing information in crystals is familiar from Superman: his Fortress of Solitude used crystals as a database. Diamond quantum chips are almost the same thing, only in reality.