Quantum Computing

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Awarded 1242 times.
Why is Grover's Algorithm considered to be a Quantum Walk?
Awarded Sep 23 at 20:31
How to simulate a $CNOT$ only using a single qubit?
Awarded Sep 23 at 11:35
Eigenstates differ between Qutip and Quspin
Awarded Sep 18 at 6:11
How to apply CNOT on a three qubit system, with two qubits already entangled?
Awarded Sep 17 at 10:42
How to eliminate the global phase of a state vector?
Awarded Sep 13 at 9:45
How to eliminate the global phase of a state vector?
Awarded Sep 13 at 7:57
Can we write a sum of unitary gates as an equivalent product of unitary gates?
Awarded Sep 8 at 7:47
What is the quantum circuit to prepare a Bell state?
Awarded Sep 8 at 5:43
Trying to run qubit spectroscopy on FakeManila backend, got unknown instruction error
Awarded Sep 3 at 7:41
Does Shor's algorithm imply the existence of the multiverse?
Awarded Sep 2 at 7:08
Error: cannot import name 'BaseBackend' from 'qiskit.providers'
Awarded Sep 1 at 13:16
Energy cost of quantum computation
Awarded Aug 29 at 4:58
Are gates in qiskit necessarily unitary?
Awarded Aug 28 at 20:05
If Statement OpenQasm 2.0
Awarded Aug 27 at 14:17
How do quantum states collapse to the right answer?
Awarded Aug 26 at 23:15
Is the inner product operation commutative or associative?
Awarded Aug 25 at 13:37
Could a quantum computer simulate any system based on different types of logic?
Awarded Aug 23 at 14:18
How to quickly calculate the custom U3 gate parameters $\theta, \phi$ and $\lambda$ for any unitary?
Awarded Aug 21 at 6:35
Is there any online Bloch sphere simulator?
Awarded Aug 19 at 20:17
How to retrieve the "counts" data as integers?
Awarded Aug 19 at 20:07
How to prove the matrix identities $HXH = Z$ and $HZH = X$?
Awarded Aug 18 at 7:25
(post deleted or otherwise unavailable)
Awarded Aug 16 at 9:55
Is there a way to generate random circuits in qiskit with only certain allowed gates?
Awarded Aug 15 at 19:42
Efficiently computing weight enumerators of quantum codes
Awarded Aug 12 at 22:07
What is the kernel used in the IBM Qiskit's source code?
Awarded Aug 10 at 8:16
Recognizing a CWS code in a specific case
Awarded Aug 8 at 18:16
Is there any programming project that implements one QKD protocol or demonstrates it?
Awarded Aug 6 at 7:10
Measuring Ising anyons: What is a fusion measurement?
Awarded Jul 30 at 15:10
How to get the counts of measurement in QSIM simualtor
Awarded Jul 29 at 15:05
Controlled NOT gate which flips target when at least one of the control qubits is |1>
Awarded Jul 29 at 6:56
Correspondence between the Topological model and Quantum Circuit model
Awarded Jul 29 at 6:56
How can Mid-Circuit Measurements be performed in pennylane
Awarded Jul 27 at 10:12
Will quantum computers of the future be operational under room temperatures (above 0 Celsius)?
Awarded Jul 26 at 9:48
Does Rx(θ) applied on pure states create superposition?
Awarded Jul 19 at 17:16
Simulating Clifford operations on stabilizer states with tableau representation
Awarded Jul 15 at 12:51
import error :No module named 'qiskit_aqua'
Awarded Jul 15 at 4:56
Threshold value when simulating erasures with stim
Awarded Jul 14 at 17:56
What is the exact mathematical content of the no-teleportation theorem?
Awarded Jul 13 at 17:11
Derivation explanation needed
Awarded Jul 12 at 6:22
Why isn't $Ry(\pi/2)$ gate equivalent to Hadamard gate?
Awarded Jul 10 at 0:26
Understanding Quantum Adder Circuits Logic
Awarded Jul 8 at 21:41
(post deleted or otherwise unavailable)
Awarded Jul 7 at 16:51
ZZFeaureMap, TwoLocal and NLocal in Qiskit
Awarded Jul 6 at 5:37
Which phase gates can be catalyzed by Clifford+Toffoli circuits with post-selection?
Awarded Jul 4 at 14:47
Proving that with probability 1 $NP \nsubseteq BQP$ with respect to random oracles
Awarded Jul 3 at 23:43
How does the spectral decomposition of the Choi operator relate to Kraus operators?
Awarded Jul 1 at 6:17
Why does my quantum circuit run so slow on a real IBM quantum hardware?
Awarded Jun 30 at 6:25
Algorithm for Mutually Unbiased Basis Sets Available?
Awarded Jun 29 at 8:25
How does the Qiskit AerSimulator performance scale with the circuit depth?
Awarded Jun 26 at 16:36
Show that, averaging over uniformly random unitaries, $\mathbb{E}[UXU^\dagger]=\operatorname{Tr}(X)\frac{I}{d}$
Awarded Jun 24 at 20:41
Odd behavior in Qiskit's circuit <-> Clifford tableau functionality
Awarded Jun 19 at 5:49
Help on PySCF library
Awarded Jun 18 at 13:00
What is the Clifford gates selection probability distribution used in the generation of randomized benchmarking circuits?
Awarded Jun 16 at 12:36
What is the general unitary matrix for two- and three-qubit states?
Awarded Jun 16 at 12:21
Is verifying the solution to a QMA-complete problem efficient?
Awarded Jun 13 at 10:35
(post deleted or otherwise unavailable)
Awarded Jun 13 at 10:35
What is a maximal number factored by Shor's algorithm so far?
Awarded Jun 13 at 6:26
Survey of which 'physically interesting' many-body states can be efficiently prepared on a quantum computer?
Awarded Jun 12 at 12:52
Why adding H-gate is referred as changing the basis of measurement?
Awarded Jun 11 at 19:56
How to convert classical machine learning dataset to quantum dataset?
Awarded Jun 10 at 18:26
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