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Quantum Computing

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Answer a question with score of 1 or more.
Awarded 1605 times.
Why does a controlled gate not constitute a measurement?
Awarded 2 days ago
How to make a separable product state in a given sub-Hilbert space
Awarded Mar 23 at 21:34
How many gates are in the $ k $-th level of the single qubit Clifford hierarchy?
Awarded Mar 20 at 7:36
IS my QUBO too big for QAOA using IBM Quantum computer?
Awarded Mar 18 at 10:02
Tools for creating quantum circuit diagrams
Awarded Mar 8 at 21:00
Is there any online Bloch sphere simulator?
Awarded Mar 4 at 0:20
Reconstructing quantum state from its reduced density matrices
Awarded Jan 23 at 7:06
Can stabilizer circuits (with classical feedback and postprocessing) violate the CHSH inequality?
Awarded Jan 21 at 16:12
Quantum algorithms using relative phase of states
Awarded Jan 15 at 14:19
How should I go about learning this subject?
Awarded Jan 12 at 13:58
What's the relation between spherical and complex-projective t-designs?
Awarded Jan 11 at 14:39
Confusion on the difference between post-selection, approximate post-selection, and conditioning
Awarded Jan 9 at 20:22
Does there exist a unitary involution that together with $\text{SWAP}$ makes a universal gateset?
Awarded Dec 29, 2025 at 14:55
Is circuit cutting equivalent in anyway to quantum teleportation?
Awarded Dec 22, 2025 at 10:24
How does superconductivity quantize the (non-)harmonic oscillator of the LC-circuit?
Awarded Dec 12, 2025 at 18:06
Does there exists super-polynomial quantum advantage for decoding certain linear codes?
Awarded Dec 1, 2025 at 15:12
Why is it called the Petz 'transpose' map?
Awarded Nov 27, 2025 at 17:18
Is Extropic's "thermodynamic computing" just a classical stochastic computer dressed in quantum buzzwords?
Awarded Nov 20, 2025 at 10:48
How to show used qubits in a transpiled circuit in Qiskit?
Awarded Nov 14, 2025 at 18:35
How is Grover's algorithm used to estimate the mean and median of a set of numbers?
Awarded Oct 27, 2025 at 1:37
How do researchers quantify the usefulness of entanglement in noisy intermediate-scale quantum (NISQ) devices?
Awarded Oct 24, 2025 at 6:11
Why can't a surface code have multiple types of stabilizer on the border?
Awarded Oct 18, 2025 at 20:28
Why are there different Implementations of the CX Gate through Lattice-Surgery?
Awarded Oct 14, 2025 at 16:25
Qiskit: Get approximate execution time
Awarded Oct 10, 2025 at 10:23
Qiskit IBM Runtime: least_busy() raises QiskitBackendNotFoundError even though backends are listed
Awarded Sep 19, 2025 at 7:22
Is it known that BQP is not contained within NP?
Awarded Sep 19, 2025 at 7:22
OPENQASM code for Frequency vs flux experiments
Awarded Sep 17, 2025 at 21:03
How to run PegasosQSVC in quantum backend or simulator?
Awarded Sep 17, 2025 at 6:40
Check the fixes for $d=5$ magic state cultivation circuit
Awarded Sep 16, 2025 at 13:51
Converting numpy array representing Choi matrix to Kraus operators in QuTip
Awarded Sep 13, 2025 at 5:05
Can we expand $ Tr [(A + \epsilon B)\log(A + \epsilon B)] $ if $A$ is singular?
Awarded Sep 1, 2025 at 2:25
How to use Sinter to collect stats with postselection?
Awarded Aug 28, 2025 at 6:10
When is a generalized semi-Clifford gate also a semi-Clifford gate?
Awarded Aug 28, 2025 at 6:01
What is the ordering of qubit basis in QuTip?
Awarded Aug 26, 2025 at 6:13
How to simulate the density matrix in Qiskit when using the qasm simulator?
Awarded Aug 19, 2025 at 16:32
How to remove or change the Coupling-Map limit is qiskit?
Awarded Aug 15, 2025 at 7:20
Are there tools to generate fusion based (FBQC) gates
Awarded Aug 15, 2025 at 7:20
Does Levy's lemma hold for unitary/spherical designs?
Awarded Aug 9, 2025 at 15:02
How to run Qiskit AerSimulator with GPU (A100) in Google Colab?
Awarded Aug 7, 2025 at 2:20
Is it hard to invert unitary effects implemented using feedback?
Awarded Aug 2, 2025 at 17:53
When is $UAU^\dagger B\ge0$ for all $U$?
Awarded Aug 1, 2025 at 16:54
Application of QFT to Order-finding
Awarded Jul 29, 2025 at 6:15
does every quantum circuit have a "canonical form"
Awarded Jul 23, 2025 at 12:51
Is there any machine learning method for finding quantum error correction codes?
Awarded Jul 16, 2025 at 13:01
Quantum Maximum Likelihood Decoding
Awarded Jul 9, 2025 at 2:34
Quantum Maximum Likelihood Decoding
Awarded Jul 8, 2025 at 2:13
Beginner-friendly book on quantum computing with intuitive explanations and classical analogies
Awarded Jun 27, 2025 at 16:34
Are there tools to calculate distance of a stabilizer code?
Awarded Jun 25, 2025 at 15:37
Shor code: arbitrary quantum error-correction
Awarded Jun 25, 2025 at 15:32
Is there a way to assign different weights to and get the decoding edges from 2D graphs in each round when using pymatching to decode 3D graph
Awarded Jun 21, 2025 at 16:57
QuTip: How to multiply symbol with matrix
Awarded Jun 17, 2025 at 18:12
How to learn mathematics and physics for quantum computing
Awarded Jun 17, 2025 at 4:24
How to compute the full inner product (including global phase) between stabilizer states?
Awarded Jun 5, 2025 at 7:03
Error mitigation in dynamic quantum circuits: alternatives to dynamical decoupling?
Awarded May 28, 2025 at 6:16
Grover algorithm for a database search: where is the quantum advantage?
Awarded May 27, 2025 at 14:05
VarQITE from scratch: troubles understanding the Variational Quantum Time Evolution (VarQTE) algorithm from Qiskit
Awarded May 23, 2025 at 21:33
Is it better to use Aer simulator or a fake provider?
Awarded May 23, 2025 at 5:00
(post deleted or otherwise unavailable)
Awarded May 22, 2025 at 10:55
What is a good video resource for quantum computing?
Awarded May 20, 2025 at 13:20
(post deleted or otherwise unavailable)
Awarded May 18, 2025 at 19:50
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