Quantum Computing
Egretta.Thula's user avatar
Egretta.Thula's user avatar
Egretta.Thula's user avatar
Egretta.Thula
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319 Answers

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13 votes

Why can all quantum circuits be converted into circuits that use only real matrices?

11 votes
Accepted

What is the square root of the NOT gate?

11 votes
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Qiskit CNOT-gate matrix mixup?

11 votes
Accepted

What are the differences between Qiskit's AerSimulator, QasmSimulator and StatevectorSimulator?

10 votes
Accepted

Are there any quantum algorithms conjectured to give an exponential speedup for a non-oracle problem that don't use the Quantum Fourier Transform?

8 votes
Accepted

How efficient is Qiskit's unitary decomposition?

8 votes
Accepted

Is it true that for a quantum algorithm to be efficient it must feature a highly entangled state at some point?

8 votes

List of problems that can be reduced to finding the ground state of a Hamiltonian

7 votes
Accepted

Why does entanglement complicate quantum simulation?

7 votes
Accepted

How to represent a statevector in Dirac notation form using Qiskit?

6 votes
Accepted

Qiskit Transpiler function - Why does Toffoli + Hadamard not work as a Basis Gate set?

6 votes
Accepted

How to get resultant statevector after applying parameterized gates in qiskit?

6 votes

How does one perform amplitude encoding using only unitary gates?

6 votes
Accepted

What is the superop simulator in Qiskit for?

6 votes

Is there a function in qiskit that allows me to insert quantum gates at certain indices of a circuit?

6 votes
Accepted

What is a simple example showing the issues of not doing the "uncomputation" step?

5 votes
Accepted

Given this code fragment, what is the probability that a measurement would result in $|0\rangle$?

5 votes
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HHL algorithm for linear systems with a real matrix and a real right side

5 votes
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How to implement parametric iSWAP gate in Qiskit?

5 votes
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Why is the angle of Rz(π/4) Rx(π/4) an irrational multiple of π

5 votes
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How to create a quantum circuit transforming $α|00⟩ + β|11⟩$ to $β|00⟩-α|01⟩+β|10⟩+α|11⟩$

5 votes
Accepted

When using Qiskit's plot_bloch_vector function, how can I set colors for vectors?

5 votes
Accepted

Is it possible to use fake backends to run Qiskit Runtime primitives?

5 votes
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How to initialize a $n$ qubit system in this specific state

5 votes
Accepted

What is a Hadamard test?

4 votes
Accepted

How to implement subplots (several blochsphere plots) using qiskit?

4 votes

What is the fastest quantum computational algorithm by which quantum computer speed up than classic one?

4 votes
Accepted

Is there a way to decompose a quantum circuit into layers?

4 votes

Is APPROX-QCIRCUIT-PROB a BQP-complete problem?

4 votes
Accepted

Is BQP or PromiseBQP the better formalization of the set of "problems" that a quantum computer could solve efficiently?

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