Silicon Archives - IEEE Transactions on Quantum Engineering

Engineering minimal-complexity Clifford circuits controlled by microwaves via coherent phonon-mediated SiV− centers in diamond

May 26, 2026A. H. Homid, R. SalahEarly Access, Open AccessCircuits, Complexity theory, Diamond, Frequency, Joining processes, Phonons, Qubit, Silicon, Spinning, Timing

Abstract: Engineering quantum circuits that use minimal resource requirements is essential for suppressing noise-induced errors and enhancing the performance of quantum processors. Here, we propose minimal-complexity hardware constructions of Clifford circuits for implementing new two-qubit Clifford gates, effectively expanding the available Clifford circuit library. The circuits are realized through engineered coherent phonon-mediated interactions between two […]

A Novel n⁺/i-well Dot Ge₁₋ₓSnₓ-on-Si Single-Photon Avalanche Photodiode for High-Fill-Factor Room-Temperature Quantum Applications

May 25, 2026Harshvardhan Kumar, Advaita Sinha, P. Susthitha Menon, Jyoti TaterEarly Access, Open AccessAbsorption, Electrons, Licenses, Modeling, Nuclear facility regulation, Photonic band gap, Silicon, Single-photon avalanche diodes, Temperature, Tin

Abstract: We propose a novel design of Ge1-xSnx-on-Si single-photon avalanche photodiodes (SPADs) that aim to enhance the fill factor (FF) and minimize noise at room temperature. The device consists of a n+/i-well dot structure designed to eliminate the need for guard rings and multi-dot or array configurations typically used to enhance the active area. This […]

Improved Belief Propagation Decoding Algorithms for Surface Codes

June 6, 2025Jiahan Chen; Zhengzhong Yi; Zhipeng Liang; Xuan WangUncategorizedAccuracy, Belief propagation, Codes, Complexity theory, Error correction, Maximum likelihood decoding, Noise, Qubit, Silicon, Time complexity

Abstract: Quantum error correction is crucial for universal fault-tolerant quantum computing. Highly accurate and low-time-complexity decoding algorithms play an indispensable role in ensuring quantum error correction works effectively. Among existing decoding algorithms, belief propagation (BP) is notable for its nearly linear time complexity and general applicability to stabilizer codes. However, BP’s decoding accuracy without postprocessing […]

Generating Shuttling Procedures for Constrained Silicon Quantum Dot Array

February 14, 2025Naoto Sato, Tomonori Sekiguchi, Takeru Utsugi, Hiroyuki MizunoQuantum SoftwareCrosstalk, Electrons, Large scale integration, Logic gates, Quantum circuit, Quantum dots, Qubit, Silicon, Symbols, Voltage measurement

In silicon quantum computers, a single electron is trapped in a microstructure called a quantum dot, and its spin is used as a qubit. For large-scale integration of qubits, we previously proposed an approach of sharing a control gate in the row or column of a 2-D quantum dot array. In our array, the shuttling […]

Optimal Control of the Operating Regime of a Single-Electron Double Quantum Dot

October 16, 2023V. ReiherQuantum ComputingLogic gates, Magnetic fields, Optimal control, Pipelines, Quantum dots, Qubit, Silicon

The double-quantum-dot device benefits from the advantages of both the spin and charge qubits, while offering ways to mitigate their drawbacks. Careful gate voltage modulation can grant greater spinlike or chargelike dynamics to the device, yielding long coherence times with the former and high electrical susceptibility with the latter for electrically driven spin rotations or […]