Find answers to your questions about Quantum Computing or help others by answering their Quantum Computing questions.
Whenever we calculate entropy we make use, for example, $log(P)$ for $P$ a projection defined for some arbitrary finite dimensional Hilbert space. But for projection operators this...
Asked on 08/20/2021 by R.W
1 answerI am an undergraduate student and I wrote a paper for my research program on quantum information. To be more specific, it is about using a novel quantum algorithm to...
Asked on 08/20/2021 by Zzy1130
2 answerI've recently tried to build a Random generator using 5 hadamard gates (shown as U2 below) measured to 5 classical bits in parallel as shown in the circuit image....
Asked on 08/20/2021 by Konrad
1 answerIn the textbook “Quantum Computation and Quantum Information” by Nielsen and Chuang, it is stated that there exists a set of unitaries $U_i$ and a probability distribution $p_i$...
Asked on 08/20/2021
4 answerI am trying to use the method of calculating the expectation values of Pauli operators in Qiskit which I found here. However, the results obtained via IBMQ sampling differ...
Asked on 08/20/2021 by stinglikeabeer
1 answerGiven the state of a system as $rho_s$ and that of the ancilla (pointer) as $rho_a$, the Von-Neumann measurement involves entangling a system with ancilla and then performing...
Asked on 08/20/2021
0 answerIs there any relation between the Wigner quasi-probability distribution function $W$ and the statistical second-moment (also known as covariance matrix) of a density matrix of a continuous variable state,...
Asked on 08/20/2021 by Kianoosh.kargar
1 answerGiven a quantum channel (CPTP map) $Phi:mathcal Xtomathcal Y$, its adjoint is the CPTP map $Phi^dagger:mathcal Ytomathcal X$ such that, for all $Xinmathcal X$ and $Yinmathcal...
Asked on 08/20/2021
3 answerI found an answer that shows how to detect the phase in cases like $0$, $pi/8$, $pi/2$, $pi/4$ or $pi$ for circuit to prepare...
Asked on 08/20/2021 by Psanfi
1 answerSuppose you are given two circuit descriptions $A$ and $B$ where by a circuit description I mean a sequence of gates (in the order they are applied) and...
Asked on 08/20/2021 by Marsl
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