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2 votes
3 answers
110 views

Quantum computing coding setup for a beginner

4 votes
1 answer
167 views

Why are orthogonal quantum states represented as collinear in the Bloch sphere?

2 votes
1 answer
54 views

Solution to Nielsen & Chuang Exercise 5.3 (FFT)

4 votes
2 answers
2k views

Find the $\theta$ and $\phi$ values on the Bloch sphere corresponding to the state $\frac{1+i}{2}|0\rangle+\frac1{\sqrt2}|1\rangle$

4 votes
1 answer
131 views

Regarding the inductive proof that any Clifford gate can be made of Hadamard, phase and c-not

4 votes
0 answers
52 views

Question regarding Quantum Phase Estimation (Nielsen and Chuang exercise 5.8)

2 votes
1 answer
130 views

How to show $T(\rho,\sigma)≥\sum_i|r_i − s_i|$ with $r_i,s_i$ eigenvalues of $\rho,\sigma$?

1 vote
1 answer
77 views

Theta value passed as input to quantum phase estimation: qiskit textbook

4 votes
2 answers
233 views

How do we achieve mathematically that the probability that Eve learns $x$ is $\cos^{2}\left ( \frac{\pi }{8} \right )$?

1 vote
1 answer
91 views

Conditional entropy as relative entropy between probability distributions

-3 votes
2 answers
102 views

What is the definition of expectation value in Nielsen and Chuang?

2 votes
1 answer
99 views

Standard form Shor's code

3 votes
1 answer
77 views

Proof of Nielsen's theorem (Theorem 12.15) given in Nielsen-Chuang (assumption of invertibility)

1 vote
2 answers
120 views

Grover search in Quantum Computation and Quantum Information (Nielsen and Chuang)

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