Questions tagged [qubit-mapping]
The qubit-mapping tag has no usage guidance.
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References for mapping qudit gates to qubits equivalent
Let's assume that I'm modelling a d-levels qudit as a set of n qubits, where $d = 2^n$. I would need to map the application of quantum gates on the qudit to a set of operations of the relative qubits ...
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Qiskit qubit ordering
In their to_ising documantation page, Qiskit devs mark the comment:
Variables are mapped to qubits in the same order, i.e., $i$-th variable is mapped to $i$-th ...
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Mapping a generic 2-local spin graph to one with a maximum amount of neighbours
I remember having heard once that generic spin-graphs e.g. Ising, or at least 2-local ones, can always be mapped to one another one (which will typically be larger), where every spin has at most $n$ ...
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Qiskit: How much exact number of qbits simulator is capable of working with
My circuit is adding two 128 bits number and each input has been stored in 128 length quantum register (total 128*3 + carry in and out, 386). For calculation purpose I am using AER's different ...
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What do arbitrary encoding circuits provide?
I'm about to implement my first VQC for image classification and I'm trying to figure out which data encoding method could fit better the problem. From what I've understood, there are three main ...
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Using machine learning to determine a good initial mapping for a quantum circuit
I am trying to use a machine learning model to find a good initial mapping for a quantum circuit. I am trying to minimise the number of swap operations i.e. the number of CNOT gates. This is my ...
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Specifying Ancilla qubits for initial_layout parameter in qiskit.transpile
So I have an array which specifies the initial layout of a 4 qubit quantum circuit and I want to map the qubits to a 5 qubit quantum computer. As only 4 out of the 5 qubits will be used, Qiskit ...
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Why does Parity mapping allow 2 qubit reduction?
when mapping from fermionic to qubit hamiltonian, using Parity mapper allow us to reduce 2 qubit in the final hamiltonian. I would like to understand which kind of symmetries are being used and how it ...
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Copying |0⟩, |1⟩ Qubits will break the no-cloning theorem?
I am trying to create a bit string of |0⟩'s and |1⟩'s in order to create an array.
Would this still break the no-cloning theorem since we do know their state: they are |0⟩'s and |1⟩'s.
If possible, ...
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Question about performing VQE with an embedded Hamiltonian
Say I have a physical Hamiltonian $\mathcal{H}$ which is $D$-dimensional and I encode it into a larger matrix $M$ which is $\Delta$-dimensional. In the cases I care about $\Delta$ is strictly greater ...
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General Ehrenfest Theorem applied to N-qubit system operator
Please advise if the following short calculation of the derivative of the expectation value of an all spin Pauli-$\hat{Y}$ operator (acting on a $N$-qubit system) is consistent:
The general Ehrenfest ...
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Time execution on real quantum backend higher than classical kmeans
I am running some experiments on a real quantum backend of IBM with qmeans approach. My dataset has 2 features (2 dimensions).
I observe higher execution time on the Quantum Calculate Distance routine ...
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Is it possible to build a "Quantum Karnaugh Map"?
Is it possible to build something similar to the Karnaugh Map but instead of classical bits input and output with qubits input and output?
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Coupling maps in quantum computation
Perhaps a bit naive question from my side, but I could not find any satisfactory answer elsewhere:
What exactly are the coupling maps in quantum computation and, more particularly, how do those maps ...
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How to re-order logical qubit location into desired state?
Now, I'm studying about qubit mapping. When the mapping is done, the logical qubit will be randomly mapped to physical qubit. But I want to move the logical qubit location into desired state.
For ...
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How to re-ordering physical qubit location into desired one?
Suppose original quantum circuit have 4 qubits and some quantum operation. Also suppose the result of original quantum circuit state is '1100'. Then apply qubit mapping then mapping state is like ...
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How to assemble two quantum circuits whose qubit mapping states are different each other?
I uploaded similar question before, but the answer was not I want. I think I should show you in more detail about my question.
I use SABRE algorithm which can do qubit mapping for executing quantum ...
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