Quantum Computing

Nice Question

 Nice Question
Question score of 10 or more. This badge can be awarded multiple times.
Awarded 434 times.
Are all $[[n, k, d]]$ quantum codes equivalent to additive self-orthogonal $GF(4)^n$ classical codes?
Awarded Jun 3, 2022 at 0:49
Does the quantum Fourier transform have many applications beyond period finding?
Awarded Jun 1, 2022 at 21:56
Is there a closure property for the entire Clifford hierarchy?
Awarded May 28, 2022 at 13:08
How to approximate $Rx$, $Ry$ and $Rz$ gates?
Awarded May 25, 2022 at 15:26
What is the difference between the "Fubini-Study distances" $\arccos|\langle\psi|\phi\rangle|$ and $\sqrt{1-|\langle\psi|\phi\rangle|}$?
Awarded May 18, 2022 at 8:06
Why do quantum computers have more qubits than classical computers have bits?
Awarded May 17, 2022 at 6:27
How to calculate the distance of stabilizer code?
Awarded May 11, 2022 at 13:12
Is there a simple, formulaic way to construct a modular exponentiation circuit?
Awarded Apr 28, 2022 at 6:11
What is the actual power of Quantum Phase Estimation?
Awarded Apr 28, 2022 at 0:58
How to calculate an Expected Value of some operator acting on qubits?
Awarded Mar 30, 2022 at 3:06
Number of Qubits Required for Simulation of Caffeine and Penicillin Molecules
Awarded Mar 26, 2022 at 18:55
How can one define contextuality within the circuit model?
Awarded Mar 22, 2022 at 14:40
How do quantum computers prevent "quantum noise"?
Awarded Mar 19, 2022 at 22:09
What's an example of building a circuit $U_f$ that implements a simple function $f$?
Awarded Feb 28, 2022 at 21:36
What's meant by the depth of a quantum circuit?
Awarded Feb 27, 2022 at 21:32
Why exactly are variational algorithms considered promising?
Awarded Feb 27, 2022 at 16:57
Evaluating expectation values of operators in Qiskit
Awarded Feb 27, 2022 at 15:37
General parametrisation of an arbitrary $2\times 2$ unitary matrix?
Awarded Feb 21, 2022 at 21:02
How can classical bits be copied if qubits cannot be copied?
Awarded Feb 15, 2022 at 22:27
Degeneracy of Quantum Error Correction Codes
Awarded Feb 9, 2022 at 5:47
What are the basics needed to learn quantum computing?
Awarded Feb 8, 2022 at 12:25
How to keep track of entanglements when emulating quantum computation?
Awarded Jan 27, 2022 at 3:02
Consequences of SAT ∈ BQP
Awarded Jan 23, 2022 at 18:33
Procedures and intuition for designing simple quantum circuits?
Awarded Jan 22, 2022 at 20:31
What does the paper "Training Variational Quantum Algorithms Is NP-Hard (Phys. Rev. Lett. 127, 120502)" mean?
Awarded Jan 20, 2022 at 7:51
Why doesn't the Gottesman-Knill theorem render quantum computing almost useless?
Awarded Jan 5, 2022 at 3:40
How do you apply a CNOT on polarization qubits?
Awarded Jan 3, 2022 at 17:48
Why does (almost) every pair of Hamiltonians generate, through repeated commutation, the whole space of Hermitian matrices?
Awarded Dec 21, 2021 at 11:31
How is it possible to implement unitary operator when its size is exponential in inputs?
Awarded Dec 20, 2021 at 15:27
What is the simplest algorithm to demonstrate intuitively quantum speed-up?
Awarded Dec 17, 2021 at 20:56
How to check if a quantum circuit can be constructed for a given matrix representation?
Awarded Dec 11, 2021 at 11:02
Where exactly does entanglement appear in Shor's algorithm?
Awarded Dec 11, 2021 at 2:27
How is quantum teleportation generalized to qudits?
Awarded Dec 6, 2021 at 20:45
Quantum algorithms for Prolog or automated theorem proving?
Awarded Dec 6, 2021 at 15:32
On the distribution of the fidelity of a random product state with an arbitrary many-qubit state
Awarded Nov 16, 2021 at 17:41
Are there any algorithms that take measurements in an intermediate step?
Awarded Nov 6, 2021 at 11:30
Is there any online Bloch sphere simulator?
Awarded Oct 23, 2021 at 18:30
How and why does swap test works?
Awarded Oct 18, 2021 at 5:25
How many classical bits are needed to represent a qubit?
Awarded Oct 5, 2021 at 22:02
Intuition about Knill-Laflamme QEC conditions
Awarded Sep 29, 2021 at 14:52
Status of hidden shift and hidden subgroup problems
Awarded Sep 17, 2021 at 23:04
How to create quantum circuits from scratch
Awarded Sep 11, 2021 at 13:06
Who was the first to call the phase gates $P(\pi/2)$ and $P(\pi/4)$ the $S$ and $T$ gates, and were they motivated by generators of the modular group?
Awarded Sep 4, 2021 at 18:20
Can arbitrary matrices be decomposed using the Pauli basis? [duplicate]
Awarded Sep 3, 2021 at 10:08
How can we keep Schrödinger's cat alive?
Awarded Aug 30, 2021 at 12:57
What does "bipartite" mean?
Awarded Aug 26, 2021 at 6:33
Why is the Pauli group used for stabilizers?
Awarded Aug 25, 2021 at 20:41
What are min and max overlaps of a maximally entangled state with a separable state?
Awarded Aug 24, 2021 at 3:45
Relation between quantum entanglement and quantum state complexity
Awarded Jul 16, 2021 at 4:10
Is VQE a class of algorithms or a specific algorithm?
Awarded Jul 14, 2021 at 7:10
What is the difference between QAOA and Quantum Annealing?
Awarded Jun 30, 2021 at 19:03
Where does precisely the difficulty in exponentiating a Hamiltonian $H$ in the quantum simulation problem lay?
Awarded Jun 16, 2021 at 15:27
Is there an efficient circuit implementing the unitary $U|x\rangle|0\rangle=|x\rangle\Big(\sqrt{1 - x/2^n}\,|0\rangle+\sqrt{x/2^n}|1\rangle\Big)?$
Awarded Jun 10, 2021 at 23:57
Are circuits with more than 1000 gates common?
Awarded Jun 1, 2021 at 21:18
Where is the parallelism in Deutsch-Jozsa algorithm?
Awarded May 31, 2021 at 19:17
Minimum number of CNOTs for a 4-qubit increment on a planar grid
Awarded May 26, 2021 at 21:04
Does higher channel fidelity imply higher entanglement fidelity?
Awarded May 6, 2021 at 21:46
What are examples of non-oracular versions of famous oracular problems?
Awarded May 6, 2021 at 21:46
Reference that explains how to read 3d topological diagrams for surface code computations
Awarded May 6, 2021 at 21:46
Estimate/determine Bures separability probabilities making use of corresponding Hilbert-Schmidt probabilities
Awarded May 1, 2021 at 16:35
1
2
3 4 5
…
8

Your privacy

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.