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right but with a quantum communications you would not need to be physically close to the exchange, there would be no delay at all or advantage of physical proximity.

I think you might still have the old view of the exchange with people shouting orders... I am not 100% sure, but I believe 99.9% transactions now are carried out by computer (i.e. from any place in the world in any market in the world...).

my understanding is , if I have a trading computer and you have a trading computer and mine has a 1 picosecond delay and you are twice as far away and have a 2 picosecond delay then I win. But quantum communications would make it literally instantaneous, there is not any delay with entangled particles right?

Oh, but here you are talking about entanglement... it's more of a communication issue than quantum computer processing power... if 2 particles entangled, there would be no delay, would you be 2 blocks away or the other side of the universe ...

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