![]() It's an extremely clever scheme, but one that won't pay off at all. From even light-years away, you can instantly learn about what was measured at a destination by observing the particles you've had with you all along. All you need is a sufficiently prepared system of entangled quantum particles, an agreed-upon system for what the various signals will mean when you make your measurements, and a pre-determined time at which you'll make those critical measurements. This seems like a great setup for enabling faster-than-light communication. Tonomura and Belsazar of Wikimedia Commons Regardless of the interpretation, quantum experiments appear to care whether we make certain observations and measurements (or force certain interactions) or not. slit” the electron goes through, you destroy the quantum interference pattern shown here. The wave pattern for electrons passing through a double slit, one-at-a-time. Then, you make your measurements of the entangled pairs at the source, and determine with better than 50/50 likelihood what state was chosen by the observer at the destination. ![]()
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