Top new questions this week: |
A leading approach to circumventing the Eastin-Knill theorem involves using stabilizer codes which support a transversal implementation of the full Clifford group, and obtaining universal gateset via ... |
I have noticed a lot of quantum algorithms that do not output an exact answer generally scale as $O(\log(1/\epsilon))$ where $\epsilon$ is the error threshold. I initially thought that this is because ... |
I have two circuits (below) : first works fine (no complaints from stim); second comes back with a "non-deterministic detector" error. The difference between the two circuits is that the ... |
Recently, I have watched video on 3Blue1Brown about Grover's algorithm. He give an example that:To find a secret number in the range from 0 to n−1, you can query ahidden function that returns “true”... |
Greatest hits from previous weeks: |
Is there any way to emulate a quantum computer in my normal computer, so that I will be able to test and try quantum programming languages (such as Q#)? I mean something that I can really test my ... |
Below is a figure from a TIME magazine edition. I have a few questions regarding this representation of quantum computing:Is saying "0 and 1 at the same time" a correct statement? Isn't ... |
I've consulted Nielsen and Chuang to understand the Stinespring Dilation, but wasn't able to find anything useful. How does this operation relate to partial trace, Kraus operators, and purification? |
I have done some sort of online research on qubits and the factors making them infamous i.e allowing qubits to hold 1 and 0 at the same time and another is that qubits can be entangled somehow so that ... |
What is the motivation behind density matrices? And, what is the difference between the density matrices of pure states and density matrices of mixed states?This is a self-answered sequel to What&#... |
I would like to know how to design a quantum circuit that given a Hermitian matrix $\hat{H}$ and time $t$, maps $|\psi\rangle$ to $e^{\frac{i\hat{H}t}{\hbar}} |\psi\rangle$ with $\hbar =1$.Thank you ... |
In a three-qubit system, it's easy to derive the CNOT operator when the control & target qubits are adjacent in significance - you just tensor the 2-bit CNOT operator with the identity matrix in ... |
