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1 vote
0 answers
28 views

State tomography in Qiskit on a subset of qubits of real QPU

1 vote
1 answer
37 views

Proability of measuing a qubit in a two qubit system without having a perpendicular basis

2 votes
0 answers
30 views

Almost perfect quantum encryption of a mixed state using only $n + O(\log(n) +\log(\frac{1}{\epsilon}))$ shared bits

3 votes
2 answers
237 views

Prove that there is no polynomial size quantum algorithm for a Simon's problem with no promise on the input

2 votes
1 answer
55 views

To understand the notation of $| a, a \oplus b \rangle$

4 votes
3 answers
577 views

Creating a uniform superposition of a subset of basis states

3 votes
2 answers
87 views

Are measurements in $X$ and $Z$ bases being equal enough to prove equality of quantum states?

6 votes
2 answers
548 views

Prove the fidelity can be written in terms of Pauli expectation values as ${\rm tr}(\rho\sigma)=\sum_k \chi_\rho(k)\chi_\sigma(\rho)$

5 votes
2 answers
1k views

What is the IQ plane?

4 votes
1 answer
494 views

Show that quantum channels act as affine transformations in the Bloch sphere

0 votes
0 answers
21 views

What is the role of color in color code? ( theoritically and exprimentally)

7 votes
2 answers
296 views

How can quantum error correction correct small rotations/continuous errors?

4 votes
2 answers
90 views

Show that all extensions of $\rho$ can be obtained as a channel applied to its purification

0 votes
1 answer
55 views

How to convert one state of a quantum system to a desired state?

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