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1 vote
1 answer
109 views

Show the linearity of $(\langle a_m|\otimes I_B\otimes I_C\otimes \langle d_q|) U(I_{A}\otimes I_B\otimes |0_{C}\rangle\otimes |0_{D}\rangle)$

3 votes
1 answer
108 views

Show that $E_k=(I\otimes\langle e_k|)U(I\otimes|e_0\rangle)$ implies $U=\begin{bmatrix}[E_1]&\cdots\\ [E_2]&\cdots\\\vdots&\ddots\end{bmatrix}$

1 vote
2 answers
66 views

Errors while encoding (3 qubit code)

0 votes
1 answer
62 views

Question regarding the measurement of Pauli matrices on a Bell state

3 votes
1 answer
91 views

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

1 vote
1 answer
81 views

How can I represent the completely mixed state as $\frac I2=\frac14(\rho+X\rho X+Y\rho Y+Z\rho Z)$?

2 votes
2 answers
92 views

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

2 votes
1 answer
133 views

Heisenberg Uncertainty Principle (Nielsen and Chuang Box 2.4)

0 votes
1 answer
58 views

Bit flip error correction syndrome measurements

1 vote
1 answer
56 views

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

3 votes
4 answers
335 views

Can a Kraus representation act as the identity on any operator?

2 votes
1 answer
68 views

How to calculate the action of a channel on part of a quantum state?

2 votes
1 answer
54 views

Writing a Density matrix in terms of the magnitude of the Bloch Vector

0 votes
1 answer
88 views

How to create a quantum circuit checking whether two functions $f$ or $g$ are of the same type?

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