Unanswered Questions
2,382 questions with no upvoted or accepted answers
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How to connect the idea of inner product, outer product, matrix element in 3 level composite system?
I was solving steady state solution given by Lindblad equation, and I got stuck on the calculation part like what will be the value of $\langle e, 0|b, 0\rangle$?
And how should I rewrite $|d, 0\...
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How to access/ read $\alpha$ and $\beta$ values of a certain qubit in a multi-qubit system in a for loop?
In order to rotate the qubit state I need first to be able to read the values of $\alpha$ and $\beta$ and based on their values I will apply the Q-Gate for rotating the states of the single Qubits in ...
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What is an example of numbers that when used for a Gaussian pulse, would result in a rotation about the x axis?
For the playing of a Gaussian pulse, what is an example of numbers that could be plugged in for duration, amp, and sigma that would result in the pulse rotating something about the x axis?
Here is the ...
glS♦
- 26.9k
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How to get information about 'qubit location' or 'variable of qubit location' in qiskit docs?
I have something problem with using qiskit.
I searched several qiskit docs to get 'qubit location' or 'variables' that represent qubit.
I searched three documents below.
...
CommunityBot
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How does the amplitude amplification in Grover's algorithm work?
As the question says - how does the amplitude amplification in Grover's algorithm work?
I am fine with adding the negative phase on the winning state, but how does one generate the diffuser to ...
- 3,109
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How to use backend.run() with a constant pulse shape in order to get the results of a measurement?
I have formed a constant pulse and then I ran a measurement on the pulse. Now, I want to run a job to access the results of the measurement. Attached is a picture of the pulse and measurement. Now, at ...
CommunityBot
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Qiskit equivalent of get_expectation_value() in ProjectQ
Is there a corresponding function that has the same function as function get_expectation_value() in Project Q?
Get the expectation value of qubit_operator w.r.t. the current wave function ...
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How do you build the modified Toffoli gate using only local unitary and CNOT operations?
How do you build a circuit for a modified Toffoli gate using only local unitary operations and CNOT operations? The two-qubit unitary operation is given by: $\text{diag}\{1, 1, 1, e^{i\phi}\}$.
glS♦
- 26.9k
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How to simplify a circuit with repeated same parts?
If I have a circuit with 3 qubits and repeated gates as follow:
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- 2,603
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Process Tomography for Blind Quantum Computation
Process Tomography can identify the quantum channel, while Blind Quantum Computation strives to hide the inputs using quantum gates.
Given the user executes the same blind circuit multiple times (of ...
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Is there a simple quantum gate that shows off the power of Quantum interference?
I'm trying to build a deep understanding of where the power of quantum computing comes from when compared to probabilistic computing. A naive observation might be that probabilistic computing would be ...
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What does it mean to have a negative cost (aka loss) function?
In the Variational Quantum Linear Solver (VQLS) paper they define four cost functions (2 global and 2 local) and state in Appendix B that "all four cost functions are non-negative." However, ...
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Method to mark only when certain conditions are satisfied in the superposition states of qubits
I am Newbie in Quantum Computing World.
While studying on my own, I was curious about one thing, so I asked this question.
My question is as follows:
When I configure the superposition states of ...
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After a photon passes through the phase shifter, does it gain the geometric phase or dynamical phase?
In Quantum Mechanics, the phase can be divided into geometric phase and dynamical phase. In mach-zehnder interferometer, after the photon passes through the phase shifter, what kind of phase does it ...
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Molecular Docking using Quantum Computing
I would like to ask if somebody could suggest me a pair of ligand-Protein which had been validated and the corresponding resulting drug is already being used commercially.
I am interested in ...
