Quantum Computing

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Awarded 820 times.
Find the Kraus operators of the amplitude damping channel, partial tracing after evolution through a beamsplitter
Awarded Oct 18 at 18:41
Can error correction for a classical algorithm with bit flips be easier than for a general quantum circuit?
Awarded Oct 11 at 17:15
Why are POVMs useful? Are they just an axiomatic way to define measurement?
Awarded Oct 5 at 15:50
How are two photons entangled in the Xanadu computer?
Awarded Oct 5 at 13:42
When can pairs of states be transformed into other pairs of states via unitary mapping?
Awarded Oct 5 at 6:36
Why should we measure in X/Z basis for Z/X errors in Steane syndrome extraction?
Awarded Oct 4 at 15:51
How to use Clifford Data Regression for the MaxCut Problem
Awarded Oct 1 at 6:50
Qiskit Pulse Notebook
Awarded Sep 30 at 16:15
How is the ground state of a Hamiltonian defined?
Awarded Sep 28 at 6:58
Why does applying a Hadamard gate three times to $|0\rangle$ result in a tiny imaginary component in the $|1\rangle$ amplitude?
Awarded Sep 27 at 18:56
How to analyze the following quantum circuit?
Awarded Sep 27 at 11:50
What are introductory resources to learn about quantum computing hardware?
Awarded Sep 22 at 16:51
Quantum communications and "knowledge" of receiving a qubit
Awarded Sep 22 at 8:52
Question regarding integration of Haar random state
Awarded Sep 13 at 9:27
Bell state: simultaneous measurement of two entangled qubits
Awarded Sep 12 at 21:41
ZX-calculus: pi-copy rule not required for completeness?
Awarded Sep 7 at 18:07
Does the input of the quantum counting algorithm have to be a uniform superposition state?
Awarded Sep 7 at 9:55
Hi My Dears, I was working on the Quadratic Equation Solution Technique Using Quantum?
Awarded Sep 5 at 12:35
Error when running a VQE circuit in IBMQ backends
Awarded Sep 4 at 21:30
How universal is the Toffoli gate for classical reversible computing?
Awarded Sep 3 at 23:42
How is quantum transpilation scaled?
Awarded Sep 3 at 11:32
Qiskit issues with Apple Silicon?
Awarded Sep 2 at 15:56
What are examples of non-oracular versions of famous oracular problems?
Awarded Sep 1 at 2:47
(post deleted or otherwise unavailable)
Awarded Aug 31 at 7:25
Resources for QML hackathon/textbook types of questions
Awarded Aug 30 at 16:57
How to prepare a quantum state of the form $\frac1{2^{n/2}}\sum_{x \in \{0, 1\}^{n}} |x\rangle |y_x\rangle$ with $y_x$ random variables?
Awarded Aug 25 at 12:15
If all quantum gates must be unitary, what about measurement?
Awarded Aug 21 at 4:15
Rotations to encode $f(x)$ into ancilla qubit for quantum Monte Carlo
Awarded Aug 21 at 4:15
Cannot get a provider from IBMQ
Awarded Aug 17 at 12:36
Solving higher-order (unconstrained) binary optimization problems with QAOA without quadratization
Awarded Aug 13 at 9:06
Why do we have to measure the circuit before sending it to the real quantum computer?
Awarded Aug 13 at 2:11
Installing qiskit with `pip install qiskit` gives `ERROR: Command errored out with exit status 1`
Awarded Aug 12 at 15:49
How is outer product an operator?
Awarded Aug 12 at 9:56
What properties do Kraus operators of Markovian processes have?
Awarded Aug 10 at 23:21
Partial Cyclic Permuation with only Toffoli and CNOT gates?
Awarded Aug 10 at 13:19
Introductory material for quantum machine learning
Awarded Aug 9 at 8:55
Can Google Sycamore's benchmark for quantum supremacy be simulated on Qiskit?
Awarded Aug 9 at 8:26
Import Qiskit fails
Awarded Aug 8 at 18:20
Qiskit CNOT-gate matrix mixup?
Awarded Aug 8 at 9:34
Can someone explain using H and T gates repeatedly?
Awarded Aug 7 at 21:48
Software tools to train quantum circuits with parameters
Awarded Aug 7 at 5:04
What's the difference between open-source QRNG and Quantis Device?
Awarded Aug 7 at 5:04
Design NISQ Circuit with StrawberryFields
Awarded Aug 7 at 4:42
IBM Q devices' hardware/resource constraints
Awarded Aug 7 at 4:42
What is a term for a basis state along with its corresponding complex amplitude?
Awarded Aug 7 at 4:27
Objective function of Quantum GAN in the paper "Quantum generative adversarial networks"
Awarded Aug 5 at 21:04
(post deleted or otherwise unavailable)
Awarded Aug 3 at 9:49
Noise-induced amplitude amplification?
Awarded Aug 2 at 16:47
How come classical Deutsch-Jozsa is $O(1)$ when allowing "a small error rate"?
Awarded Jul 30 at 23:35
Question about the counter diabatic(CD) term in Digitized Adiabatic Quantum Computing
Awarded Jul 28 at 14:27
How to generate a quantum circuit from the quantum state $|1000\rangle+|0100\rangle+|0010\rangle+|0001\rangle$?
Awarded Jul 26 at 17:47
Clarifying Mosca's Inquality Theorem - parallel vs additive
Awarded Jul 26 at 17:47
(post deleted or otherwise unavailable)
Awarded Jul 24 at 18:11
What are the constraints for the coefficents of the basis states in quantum computing?
Awarded Jul 23 at 15:06
What is "Lindblad Superoperator" in Stochastic Master Equation
Awarded Jul 23 at 4:10
How to derive the CNOT matrix for a 3-qubit system where the control & target qubits are not adjacent?
Awarded Jul 22 at 11:17
Finding minimum with Grover
Awarded Jul 21 at 18:06
Can't draw figures with Qiskit in Visual Studio
Awarded Jul 19 at 15:56
The Adiabatic Theorem - How to derive Schrödinger equation in the "s" variable
Awarded Jul 17 at 16:40
Test for Entanglement of Unitary
Awarded Jul 14 at 15:21
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