Questions tagged [encoding]

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Quantum data as input for Quantum Neural Net

I'm new to quantum machine learning, and I wanted to know how quantum data is processed in a quantum neural net. For example, if I am training a QNN to classify entangled circuits from non-entangled ...
beginnerCoder7's user avatar
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How can I decode a ZZFeatureMap?

I've encoded a basic 2x2 image into a quantum circuit using a ZZFeatureMap in Qiskit. Is there any way I can verify that this encoding was correctly done? My first thought was to try to decode this ...
Harshil Avlani's user avatar
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Preparation of logical state with qLDPC code

I'm recently learning qLDPC code. Although I've seen literature talking about the code construction, parity check, possible logical operation and decoding. How exactly do I prepare e.g. a logical phi ...
AndyLiuin's user avatar
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A matrix that can be simultaneously diagonalisable can induce a decomposition of its space

Potentially "space" is not the correct word to use in the title, please correct if wrong I am reading "Quantum Error Correction Via codes over Gf(4)" and I came across something I ...
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Does the fact that the elements of the normalizer group commute with elements of the stabilizer group imply that the normalizer is abelian?

The following question is from a paper I am reading called "Quantum Error Correction Via Codes Over GF(4)" It says: Let $E$ be the quantum error group. Let $S' \leqslant E$ which specifies ...
am567's user avatar
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Visual the qubit state after amplitude encoding

I trying to visualize qubits state after amplitude encoding. I have the following code which takes the 8 feature [1/2, 1/2, 1/2, 1/2,1/2, 1/2,1/2,1/2] and encodes into 3 qubits. I now get the output [...
kannan quantum's user avatar
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Is efficient state preparation possible for binary states?

Binary Vector Definition: A vector where each entry has one of 2 possible values: $\{0, \dfrac{1}{\sqrt{K}}\}$. Where $K$ is the number of non zero entries. Question Is there anything special about ...
bubakazouba's user avatar
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Data encoding (PennyLane) vs feature map (Qiskit)

I am new to quantum machine learning and I came across data encoding (in Pennylane) and feature map (in Qiskit). What are their similarities and differences?
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How to best represent 5-Qbit codeword operator in Qiskit [duplicate]

We learned that in the 5-Qibit error correcting code, the logical zero state $ | \bar{0} \rangle $ is encoded in the form of $ \frac{1}{4} (\mathbb{1}+M_0)(\mathbb{1}+M_1)(\mathbb{1}+M_2)(\mathbb{1}+...
Blackwidow's user avatar
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Derivation of complexity for data encoding schemes

Could anyone help to derive the space-time complexities of the following different data encoding schemes ?
kevin's user avatar
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Encoding classical data to quantum space

I went through the link " https://learn.qiskit.org/course/ch-applications/hybrid-quantum-classical-neural-networks-with-pytorch-and-qiskit" where a hybrid of classical and quantum ...
user14924's user avatar
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How does one perform amplitude encoding using only unitary gates?

How does one perform amplitude encoding using only unitary gates ? Could you show me a concrete example ?
Duen's user avatar
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Grover's algorithm to maximize QUBO functions

I'm trying to maximize a QUBO function f(x,y,z) = 3xy + 4xz - 3yz + 11y + z. How can I use Grover's algorithm to do this? I've been told to encode this cost ...
Van Peer's user avatar
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1 vote
1 answer
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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 ...
Paul's user avatar
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4 answers
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How to implement the Circuit of Steane code for Quantum Error Correction?

I have referred this same question here 'Circuit for implementing Steane's code for Quantum Error Correction' . But the answer discusses the circuit to compute the syndrome and not clearly the ...
chetan waghmare's user avatar
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Arbitrary Encoding - how 3 qubits can encode 12 distinct features?

I am trying to understand how Arbitrary Encoding, as described in this qiskit site https://learn.qiskit.org/course/machine-learning/data-encoding, works and can encode 12 features using only 3 qubits. ...
user22271's user avatar
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What is the structure of Qiskit's amplitude-encoded quantum circuit?

A problem that has been ignored before is that Ansatz does not know that classical data becomes quantum data. Although Qiskit provides the Initialize() function that can be initialized directly. I'm ...
Ren-Xin Zhao's user avatar