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Multiple choice
Resource estimate for a real algorithm requiring 100 logical qubits at surface-code distance
d
=
15
d=15
d
=
15
. With
2
d
2
2d^2
2
d
2
physical qubits per logical qubit, how many physical qubits are needed in total?
22500 (omitting the factor of 2:
100
d
2
100d^2
100
d
2
)
1500 (using
d
d
d
instead of
d
2
d^2
d
2
:
100
d
100d
100
d
)
90000 (applying the factor of 2 twice)
45000
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