Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Enhancing Quantum Memory Lifetime with Measurement-Free Local Error Correction and Reinforcement Learning
Mincheol Park, N. Maskara, Marcin Kalinowski +1 more·Aug 18, 2024
Reliable quantum computation requires systematic identification and correction of errors that occur and accumulate in quantum hardware. To diagnose and correct such errors, standard quantum error-correcting protocols utilize $\textit{global}$ error i...
Minimum synthesis cost of CNOT circuits
Alan Bu, Evan Fan, Robert Joo·Aug 15, 2024
Optimizing the size and depth of CNOT circuits is an active area of research in quantum computing and is particularly relevant for circuits synthesized from the Clifford + T universal gate set. Although many techniques exist for finding short synthes...
Coqa: Blazing Fast Compiler Optimizations for QAOA
Yuchen Zhu, Yidong Zhou, Jinglei Cheng +4 more·Aug 15, 2024
The Quantum Approximate Optimization Algorithm (QAOA) is one of the most promising candidates for achieving quantum advantage over classical computers. However, existing compilers lack specialized methods for optimizing QAOA circuits. There are circu...
Universal neutral-atom quantum computer with individual optical addressing and non-destructive readout
A. G. Radnaev, W. C. Chung, D. Cole +55 more·Aug 15, 2024
Quantum computers must achieve large-scale, fault-tolerant operation to deliver on their promise of transformational processing power [1-4]. This will require thousands or millions of high-fidelity quantum gates and similar numbers of qubits [5]. Dem...
Strategies for optimizing double-bracket quantum algorithms
Xiaoyue Li, Matteo Robbiati, Andrea Pasquale +4 more·Aug 14, 2024
Recently double-bracket quantum algorithms have been proposed as a way to compile circuits for approximating eigenstates. Physically, they consist of appropriately composing evolutions under an input Hamiltonian together with diagonal evolutions. Her...
Constant-overhead magic state distillation
Adam Wills, Min-Hsiu Hsieh, Hayata Yamasaki·Aug 14, 2024
Most schemes for realistic quantum computing require access to so-called magic states to allow universal quantum computing. Because the preparation process may be noisy, magic state distillation methods are needed to improve their accuracy and suppre...
Randomized benchmarking protocol for dynamic circuits
Liran Shirizly, L. Govia, David C. McKay·Aug 14, 2024
Dynamic circuit operations -- measurements with feedforward -- are important components for future quantum computing efforts, but lag behind gates in the availability of characterization methods. Here we introduce a series of dynamic circuit benchmar...
The x+y Floquet code: A simple example for topological quantum computation in the path integral approach
Andreas Bauer·Aug 14, 2024
The path-integral approach to topological quantum error correction provides a unified way to construct and analyze fault-tolerant circuits in spacetime. In this work, we demonstrate its utility and versatility at hand of a simple example: We construc...
A Feasible Design of Elementary Quantum Arithmetic Logic Units for Near-Term Quantum Computers
Junxu Li·Aug 13, 2024
Quantum arithmetic logic units (QALUs) constitute a fundamental component of quantum computing. However, the implementation of QALUs on near-term quantum computers remains a substantial challenge, largely due to the limited connectivity of qubits. In...
Multi-Layered Security System: Integrating Quantum Key Distribution with Classical Cryptography to Enhance Steganographic Security
Arman Sykot, Md Shawmoon Azad, Wahida Rahman Tanha +3 more·Aug 13, 2024
In this paper, we present a novel cryptographic system that integrates Quantum Key Distribution (QKD) with classical encryption techniques to secure steganographic images. Our approach leverages the E91 QKD protocol to generate a shared secret key be...
Adaptive variational quantum dynamics simulations with compressed circuits and fewer measurements
Feng Zhang, Cai-Zhuang Wang, T. Iadecola +2 more·Aug 13, 2024
The adaptive variational quantum dynamics simulation (AVQDS) method performs real-time evolution of quantum states using automatically generated parameterized quantum circuits that often contain substantially fewer gates than Trotter circuits. Here w...
Stabilizer Entanglement Distillation and Efficient Fault-Tolerant Encoders
Yu Shi, A. Patil, Saikat Guha·Aug 12, 2024
Entanglement is essential for quantum information processing, but is limited by noise. We address this by developing high-yield entanglement distillation protocols with several advancements. (1) We extend the 2-to-1 recurrence entanglement distillati...
3-SAT solver for two-way quantum computers
Jarek Duda·Aug 11, 2024
While quantum computers assume existence of state preparation process $|0\rangle$, CPT symmetry of physics says that performing such process in CPT symmetry perspective, e.g. reversing used EM impulses ($V(t)\to V(-t)$), we should get its symmetric a...
Pauli Flow on Open Graphs with Unknown Measurement Labels
Piotr Mitosek·Aug 10, 2024
One-way quantum computation, or measurement-based quantum computation, is a universal model of quantum computation alternative to the circuit model. The computation progresses by measurements of a pre-prepared resource state together with corrections...
Optimizing Pulse Shapes of an Echoed Conditional Displacement Gate in a Superconducting Bosonic System
Maxime Lapointe-Major, Yongchao Tang, M. Canturk +1 more·Aug 9, 2024
Echoed conditional displacement (ECD) gates for bosonic systems have become the key element for real-time quantum error correction beyond the break-even point. These gates are characterized by a single complex parameter $\beta$, and can be constructe...
Quantum Neural Network Training of a Repeater Node
Diego Fuentealba, Jack Dahn, J. Steck +1 more·Aug 8, 2024
The construction of robust and scalable quantum gates is a uniquely hard problem in the field of quantum computing. Real-world quantum computers suffer from many forms of noise, characterized by the decoherence and relaxation times of a quantum circu...
Recoil-free Quantum Gates with Optical Qubits
Zhao Zhang, L. V. Damme, Marco Rossignolo +11 more·Aug 8, 2024
We propose a scheme to perform optical pulses that suppress the effect of photon recoil by three orders of magnitude compared to ordinary pulses in the Lamb-Dicke regime. We derive analytical insight about the fundamental limits to the fidelity of op...
Reducing depth and measurement weights in Pauli-based computation
Filipa C. R. Peres, Ernesto F. Galvão·Aug 7, 2024
Pauli-based computation (PBC) is a universal measurement-based quantum computation model steered by an adaptive sequence of independent and compatible Pauli measurements on separable magic-state qubits. Here, we propose several new techniques for red...
Linear circuit synthesis using weighted Steiner trees
Michele Nir Gavrielov, Alexander Ivrii, Shelly Garion·Aug 7, 2024
CNOT circuits are a common building block of general quantum circuits. The problem of synthesizing and optimizing such circuits has received a lot of attention in the quantum computing literature. This problem is especially challenging for quantum de...
Machine Learning Supported Annealing for Prediction of Grand Canonical Crystal Structures
Yannick Couzinié, Yuya Seki, Yusuke Nishiya +4 more·Aug 7, 2024
This study investigates the application of Factorization Machines with Quantum Annealing (FMQA) to address the crystal structure problem (CSP) in materials science. FMQA is a black-box optimization algorithm that combines machine learning with anneal...