Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Optical Schr\"odinger cat states generation using cubic phase resource state and beamsplitter
A. V. Baeva, A. S. Losev, I. Sokolov·Apr 25, 2025
Squeezed Schr\"odinger cat states are a valuable resource for quantum error correction and quantum computing. In this paper, we investigate the gate for generating such states in the optical regime. Our scheme is based on the entanglement between an ...
Quantum Circuit Construction and Optimization through Hybrid Evolutionary Algorithms
Leo Sünkel, Philipp Altmann, Michael Kölle +3 more·Apr 24, 2025
We apply a hybrid evolutionary algorithm to minimize the depth of circuits in quantum computing. More specifically, we evaluate two different variants of the algorithm. In the first approach, we combine the evolutionary algorithm with an optimization...
Quantum coherence and counterdiabatic quantum computing
Josue R Huerta-Ruiz, Maximiliano Araya-Gaete, Diego Tancara +3 more·Apr 24, 2025
Counterdiabatic driving (CD) emerges as a valuable technique for implementing shortcuts to adiabaticity protocols, enhancing quantum technology applications. In this context, counterdiabatic quantum computing (CQC) represents a new paradigm with the ...
Quantum Fisher-Yates shuffle: Unifying methods for generating uniform superpositions of permutations
Lennart Binkowski, Marvin Schwiering·Apr 24, 2025
Uniform superpositions over permutations play a central role in quantum error correction, cryptography, and combinatorial optimisation. We introduce a simple yet powerful quantisation of the classical Fisher-Yates shuffle, yielding a suite of efficie...
Computing‐Heightened Low‐Cost High‐Dimensional Controlled‐SUM Gates
Zhi‐Guo Fan, Zhuo‐Ya Bai, Qiu‐lin Tan +1 more·Apr 24, 2025
Qudit‐based quantum gates offer several advantages over qubit‐based counterparts, such as higher information density, the ability to address more complex problems, and richer quantum operations. In this study, three realistic protocols are presented ...
Construction of Boolean Logic Gates Using QFT-Based Adder Architecture
Ayda Kaltehei, Murat Kurt, Azmi Genccten +1 more·Apr 23, 2025
In this study, we construct the quantum reversible counterparts of the logical AND, OR, XOR, NOR, and NAND gates. We utilize a quantum Fourier transform (QFT)-based adder circuit that replicates the functionality of a digital half-adder, which comput...
Braiding of Majorana zero modes in vortex cores
Maxwell Buss, Jasmin Bedow, Prashant Gupta +1 more·Apr 23, 2025
We demonstrate the successful simulation of $\sqrt{Z}$-, $\sqrt{X}$- and $X$-quantum gates using Majorana zero modes (MZMs) that emerge in magnetic vortices located in topological superconductors. We compute the transition probabilities and geometric...
Learning to decode logical circuits
Yiqing Zhou, Chao Wan, Yichen Xu +3 more·Apr 23, 2025
As quantum hardware advances toward enabling error-corrected quantum circuits in the near future, the absence of an efficient polynomial-time decoding algorithm for logical circuits presents a critical bottleneck. While quantum memory decoding has be...
Flexion: Adaptive In-Situ Encoding for On-Demand QEC in Ion Trap Systems
Keyi Yin, Xiang Fang, Zhuo Chen +10 more·Apr 22, 2025
Recent advances in quantum hardware and quantum error correction (QEC) have set the stage for early demonstrations of fault-tolerant quantum computing (FTQC). A key near-term goal is to build a system capable of executing millions of logical operatio...
Low-overhead error detection with spacetime codes
S. Martiel, Ali Javadi-Abhari·Apr 22, 2025
We introduce a low-overhead approach for detecting errors in arbitrary Clifford circuits on arbitrary qubit connectivities. Our method is based on the framework of spacetime codes, and is particularly suited to near-term hardware since it has a much ...
Entanglement-enhanced randomized measurement in noisy quantum devices
Gyungmin Cho, Dohun Kim·Apr 22, 2025
Quantum hardware is advancing rapidly across various platforms, yet implementing large-scale quantum error correction (QEC) remains challenging. As hardware continues to improve, there is a growing need to identify potential applications on noisy qua...
Entanglement of a nuclear spin qubit register in silicon photonics
Hanbin Song, Xueyue Zhang, Lukasz Komza +9 more·Apr 21, 2025
Color centers provide an optical interface to quantum registers based on electron and nuclear spin qubits in solids. The T center in silicon is an emerging spin-photon interface that combines telecom O-band optical transitions and an electron spin in...
Generalized cross-resonance scheme for maximally-entangling two-qutrit gates
Yash Saxena, Tharrmashastha Sapv, Sagnik Chatterjee +1 more·Apr 21, 2025
To utilize higher-dimensional quantum systems, in this Letter, we derive a generalized cross-resonance (GCR) scheme for realizing maximally entangling two-qutrit gates on fixed-frequency transmons beyond the 0-1 subspace. Our two-qutrit gates, namely...
Advancing quantum process tomography through quantum compilation
Huynh Le Dan Linh, Vu Tuan Hai, Le Bin Ho·Apr 21, 2025
Quantum process tomography (QPT) plays a central role in characterizing quantum gates and circuits, diagnosing quantum devices, calibrating hardware, and supporting quantum error correction. However, conventional QPT methods face challenges related t...
Multi-target rydberg gates via spatial blockade engineering
S. Stein, Chenxu Liu, Shuwen Kan +5 more·Apr 21, 2025
Multi-target gates offer the potential to reduce gate depth in syndrome extraction for quantum error correction. Although neutral-atom quantum computers have demonstrated native multi-qubit gates, existing approaches that avoid additional control or ...
Efficient simulation of Clifford circuits with small Markovian errors
Ashe Miller, Corey I. Ostrove, Jordan Hines +3 more·Apr 21, 2025
Classical simulation of noisy quantum circuits is essential for understanding quantum computing experiments. It enables scalable error characterization, analysis of how noise impacts quantum algorithms, and optimized implementations of quantum error ...
Photonic Qubit Gates via 1D Scattering from an Array of Two-Level Emitters
Evangelos Varvelis, J. Ankerhold·Apr 20, 2025
Photonic quantum computing offers a promising platform for quantum information processing, benefiting from the long coherence times of photons and their ease of manipulation. This paper presents a scheme for implementing a deterministic phase gate fo...
Quantum cellular automata for word statistics facilitated by quantum correlations
Guanhua Chen, Yao Yao·Apr 20, 2025
We propose an iterative algorithm to investigate the cooperative evolution dominated by information encoded within state spaces in a random quantum cellular automaton. Inspired by the 2-gram model in statistical linguistics, the updates of quantum st...
Short remarks on shallow unitary circuits
Jeongwan Haah·Apr 18, 2025
(i) We point out that every local unitary circuit of depth smaller than the linear system size is easily distinguished from a global Haar random unitary if there is a conserved quantity that is a sum of local operators. This is always the case with a...
Quantum Repeaters Enhanced by Vacuum Beam Guides
Yuhang Gan, Mohadeseh Azari, N. K. Chandra +4 more·Apr 18, 2025
The development of large-scale quantum communication networks faces critical challenges due to photon loss and decoherence in optical fiber channels. These fundamentally limit transmission distances and demand dense networks of repeater stations. Thi...