Isn't that assuming you could pack enough of these PHz transistors to make an asic capable of calculating SHA-256? That's quite an endeavor if they have just created one.
Has anyone even made a flip-flop or latch with any optical transistor yet?
Has anyone even made a flip-flop or latch with any optical transistor yet?
That said, you don't need flip-flops or latches to calculate SHA-256 for mining Bitcoins. You only need them at the edges of the circuit, to use the results. But you can do that with electronics at the edge, if you want to avoid stateful logic in the all-optical part.