superposition
entanglement
quantum supremacy:a quantum computer solves a problem that classical computers cannot.
?
(on solving particular problems)
O(N\sqrt N N)
https://www.youtube.com/watch?v=lvTqbM5Dq4Q
The largest number factored by Shor's algorithm?
21 = 3 ×\times× 7
about 1000000000 bits
53 qbits
Advantages:
1. Speed up calculation in particular problems
2. Reduces power consumption.
Disadvantages:
1. It makes some encryption not as safe.
2. It is not as stable as classical computers.
By Zi-Hong Xiao
