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I have 2 qubits which are in an unknown pure state i.e. their density matrix $rho$ can be expressed as $|psiranglelanglepsi|$. Let the initial state be $|psirangle...
Asked on 11/12/2021
2 answerI would like to play with a quantum circuit local_qasm_simulator in QISKit, but I do not want to implement a separate quantum circuit that would prepare an initial state. The...
Asked on 11/10/2021
1 answerGiven a mixed state with a $n$ qubit density matrix of the following structure:$$rho=pmatrix{lambda_1&&&&nu\&lambda_2\ &&lambda_{dots}\ &&&lambda_2\ nu&&&&lambda_1},$$so a mixture of a GHZ state and...
Asked on 11/07/2021
1 answerLet say we have a product state $$|phi^+rangle_{12}|phi^+rangle_{34}$$ with particles (1,4) belong to $A$ and (2,3) belong to $B$. Where $A$ and $B$ are say...
Asked on 10/05/2021
1 answerThe first time I create a two qubits, two bits circuit and draw it the output is:q0_0 q0_1 c0_0 c0_1 Each subsequent time I run my script (even after...
Asked on 10/05/2021 by Gonzo
1 answerI somewhat understand its practical use in phase estimation and algorithms like Shor's algorithm but is there some more intuitive way of understanding what it does? More concretely, I'd like...
Asked on 10/05/2021 by dhjtricks
1 answerI want to understand the form of the intrinsic Hamiltonian of the IBM machines, such as ibmq_16_melbourne, and how this affects the data I get out when waiting using identity...
Asked on 10/05/2021 by Oscar Emil Sommer
0 answerCan someone suggest me a way to load a distribution (for example a discretized Gaussian distribution) into a quantum computer using a quantum circuit? I tried to implement the code...
Asked on 10/04/2021 by VittorioC
2 answerGiven density operator of a composite system, say $rho_{AB}$, we can always calculate reduced density operators of individual system i.e. $rho_{A}=Tr_{B}(rho_{AB})$ and $rho_{B}=Tr_{A}(rho_{AB})$. Can we calculate density...
Asked on 10/04/2021 by Omkar
2 answerI know there are various quantum noise channels, which include the depolarizing channel, the dephasing channel and the bit-flip channel; We can apply them in simulators easily. However, is there...
Asked on 10/03/2021
1 answerGet help from others!
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