SHORT BLOCKLENGTH QUANTUM ACCUMULATE CODES

MUJIB RAMADHAN

Informasi Dasar

84 kali
23.05.137
384.6
Karya Ilmiah - Thesis (S2) - Reference

Quantum communications are vulnerable to the error when interacting with the environment and are suffering from three kinds of error, i.e., qubit-flip (Pauli $\mathbf{X}$), phase-flip (Pauli $\mathbf{Z}$), and both qubit-flip and phase-flip (Pauli $\mathbf{Y}$). The main difference between the classical and quantum communications is on the use of information representation, where the classical communications use bits "$0$" and "$1$", while quantum communications use quantum bit (qubit) "$\vert\psi\rangle$" as a superposition of quantum basic states. This thesis proposes quantum accumulate codes protecting $k=2$ information qubits using stabilizers derived from the classical accumulate codes, because accumulator provide good performances and low hardware complexity. The proposed quantum accumulate codes become one of codes close to the perfect quantum codes by satisfying both the quantum Hamming bound and quantum Singleton bound. This thesis first studies the encoding and decoding construction of quantum accumulate codes with 5 qubits to study the behaviour of quantum accumulate codes with small complexity, while keeping good performance. The theoretical error performances are evaluated in quantum depolarizing channels. This thesis has successfully constructed 5-qubit quantum accumulate codes for $k=1$, as a starting point, resulting the smallest perfect quantum codes, of which the performances have been verified using a series of computer simulations and found to agree with the theoretical quantum word error rate (QWER) for $k=1$. This thesis has also successfully constructed 12-qubit quantum accumulate codes for $k=2$ using several steps, where 10 stabilizers are obtained based on the classical double-accumulator. The validity of the codes are confirmed, but some similar syndromes are still found causing the QWER performances for $k=2$ is worse than the theoretical error of 12-qubit. This thesis found that: (i) the modulo 2 of simplectic inner product (SIP) of any stabilizer should be zero and (ii) the reduced-row echelon form (RREF) parity check matrix of new quantum codes should be integer or close to integer. All related results of this thesis are expected to open the new ground of the development of quantum accumulate codes to be scaled and/or concatenated with the existing quantum codes.

Subjek

TELECOMMUNICATION & COMMUNICATION
 

Katalog

SHORT BLOCKLENGTH QUANTUM ACCUMULATE CODES
 
 
Inggris

Sirkulasi

Rp. 0
Rp. 0
Tidak

Pengarang

MUJIB RAMADHAN
Perorangan
Khoirul Anwar
 

Penerbit

Universitas Telkom, S2 Teknik Elektro
Bandung
2023

Koleksi

Kompetensi

 

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