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Multiple choice
A bipartite pure state has Schmidt coefficients whose squares are the eigenvalues of the reduced density matrix
ρ
A
\rho_A
ρ
A
:
1
/
3
1/3
1/3
and
2
/
3
2/3
2/3
. What is the entanglement entropy
S
(
ρ
A
)
=
−
∑
λ
log
2
(
λ
)
S(\rho_A) = -\sum \lambda \log_2(\lambda)
S
(
ρ
A
)
=
−
∑
λ
lo
g
2
(
λ
)
, in bits?
1
0.667
0.811
0.918
Check answer