Operation Porcelain

There is no gentle peek: any measurement collapses the qubit to a definite 0 or 1, and only across many peeks does the 50/50 appear

Mission 1: Enter the Quantum World. Part of the Quantum Courier Service, a free course from the Oxford University Quantum Information Society.

Right, pay attention, old chap. We’ve managed to bag a rather exquisite, humming Echo Network qubit and locked it tight inside this containment field, sitting perfectly still in an even fifty-fifty superposition. The tech boffins at the Clarendon fancy you can sneak a sophisticated little peek at the enemy's data without making a scene, filching it as delicately as a rare folio from the Bodleian's restricted stacks. Here’s the rub: there is no gentle setting on the universe’s measurement dial. Hit ‘peek once’ and the qubit never hands you ‘half’, it collapses hard onto a definite 0 or a definite 1, every single time. The fifty-fifty only shows itself across the tally, so pile on the peeks with +5k and watch the frequencies settle. Mind your step, because you’re about to find out exactly why we call this delicate layout the "China Shop." No pressure, then. Pip pip!