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This is a pretty interesting article! I have some questions, though: 1. What properties of space facilitate quantum experiments more than terrestrial environme
by gradinafrica 10y ago
This is a pretty interesting article! I have some questions, though:
1. What properties of space facilitate quantum experiments more than terrestrial environments? Reduced gravity? Vacuums?
2. How does the satellite create pairs of entangled photons? I missed the memo that we could control entanglement...
3. When two photons are entangled, what kinds of properties about them are useful to observe/control, that give us information about or control of the twin? All I can think of are positional properties like position, speed, acceleration, etc...
- ubersync 10y agoThe quantum computers on earth work by cooling the processors to sub-zero (close to zero Calvin) temperatures. And space is dead cold. So that may be a factor. Also, the article mentions that light travels uninhibited in space.
- tim333 10y ago1. Yeah space so nothing disturbs the photons 2. "heart of their satellite is a crystal that produces pairs of entangled photons" (see https://en.wikipedia.org/wiki/Spontaneous_parametric_down-conversion https://en.wikipedia.org/wiki/Spontaneous_parametric_down-co...) 3. Mostly polarization