Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Fast scrambling in classically simulable quantum circuits
Mike Blake, Noah Linden, Anthony P. Thompson·Oct 25, 2024
We study operator scrambling in quantum circuits built from `super-Clifford'gates. For such circuits it was established in arXiv:2002.12824 that the time evolution of operator entanglement for a large class of many-body operators can be efficiently s...
Oracle Separations for the Quantum-Classical Polynomial Hierarchy
Avantika Agarwal, Shalev Ben-David·Oct 24, 2024
We study the quantum-classical polynomial hierarchy, QCPH, which is the class of languages solvable by a constant number of alternating classical quantifiers followed by a quantum verifier. Our main result is that QCPH is infinite relative to a rando...
Practical implementation of Toffoli-based qubit rotation
Christoffer Hindlycke, Jakov Krnic, Jan-Åke Larsson·Oct 24, 2024
The Toffoli gate is an important universal quantum gate, and will alongside the Clifford gates be available in future fault-tolerant quantum computing hardware. Many quantum algorithms rely on performing arbitrarily small single-qubit rotations for t...
A Distributed and Parallel (k, n) QSS Scheme with Verification Capability
Theodore Andronikos·Oct 24, 2024
This paper presents a new quantum secret sharing scheme featuring a (k, n) threshold and built-in verification. This innovative protocol takes advantage of entanglement and unfolds in three distinct phases. In anticipation of the coming of the distri...
Quantum Computing Approach to Fixed-Node Monte Carlo Using Classical Shadows
N. S. Blunt, Laura Caune, Javiera Quiroz-Fernandez·Oct 24, 2024
Quantum Monte Carlo (QMC) methods are powerful approaches for solving electronic structure problems. Although they often provide high-accuracy solutions, the precision of most QMC methods is ultimately limited by the trial wave function that must be ...
Tessellation Codes: Encoded Quantum Gates by Geometric Rotation.
Yixu Wang, Yijia Xu, Zi-Wen Liu·Oct 24, 2024
We utilize the symmetry groups of regular tessellations on two-dimensional surfaces of different constant curvatures, including spheres, Euclidean planes, and hyperbolic planes to encode a qubit or qudit into the physical degrees of freedom on these ...
Fast classical simulation of qubit-qudit hybrid systems
Haemanth Velmurugan, Arnav Das, Turbasu Chatterjee +3 more·Oct 23, 2024
Simulating quantum circuits is a computationally intensive task that relies heavily on tensor products and matrix multiplications, which can be inefficient. Recent advancements, eliminate the need for tensor products and matrix multiplications, offer...
Engineering bosonic codes with quantum lattice gates
Lingzhen Guo, Tangyou Huang, Lei Du·Oct 22, 2024
Bosonic codes offer a hardware-efficient approach to encoding and protecting quantum information with a single continuous-variable bosonic system. However, previous quantum gates lack analytical methods for decomposing quantum circuits and require co...
Scalable Constant-Time Logical Gates for Large-Scale Quantum Computation Using Window-Based Correlated Decoding
Jiaxuan Zhang, Zhao-Yun Chen, Jia-Ning Li +6 more·Oct 22, 2024
Large-scale quantum computation requires to be performed in the fault-tolerant manner. One crucial challenge of fault-tolerant quantum computing (FTQC) is reducing the overhead of implementing logical gates. Recently work proposed correlated decoding...
TE-PAI: exact time evolution by sampling random circuits
Chusei Kiumi, Bálint Koczor·Oct 22, 2024
Simulating time evolution under quantum Hamiltonians is one of the most natural applications of quantum computers. We introduce TE-PAI, which simulates time evolution exactly by sampling random quantum circuits for the purpose of estimating observabl...
Runtime Reduction in Linear Quantum Charge-Coupled Devices using the Parity Flow Formalism
F. Dom'inguez, M. Fellner, Berend Klaver +3 more·Oct 21, 2024
Using the Parity Flow formalism, we show that physical SWAP gates can be eliminated in linear hardware architectures, without increasing the total number of two-qubit operations. This has a significant impact on the execution time of quantum circuits...
Hybrid Quantum-HPC Solutions for Max-Cut: Bridging Classical and Quantum Algorithms
Ishan Patwardhan, Akhil Akkapelli·Oct 21, 2024
This research explores the integration of the Quantum Approximate Optimization Algorithm (QAOA) into Hybrid Quantum-HPC systems for solving the Max-Cut problem, comparing its performance with classical algorithms like brute-force search and greedy he...
Integration of Cobalt Ferromagnetic Control Gates for Electrical and Magnetic Manipulation of Semiconductor Quantum Dots
F. Bersano, M. Aldeghi, N. Martinolli +6 more·Oct 21, 2024
The rise of electron spin qubit architectures for quantum computing processors has led to a strong interest in designing and integrating ferromagnets to induce stray magnetic fields for electron dipole spin resonance (EDSR). The integration of nanoma...
Quantum Convolutional Neural Network: A Hybrid Quantum-Classical Approach for Iris Dataset Classification
S. Yousuf, Iqbal Tomal, Abdullah Al Shafin +2 more·Oct 21, 2024
This paper presents a hybrid quantum-classical machine learning model for classification tasks, integrating a 4-qubit quantum circuit with a classical neural network. The quantum circuit is designed to encode the features of the Iris dataset using an...
Projective Quantum Eigensolver with Generalized Operators
D. Mondal, Chayan Patra, Dipa Halder +1 more·Oct 21, 2024
Determination of molecular energetics and properties is one of the core challenges in the near-term quantum computing. To this end, hybrid quantum-classical algorithms are preferred for Noisy Intermediate Scale Quantum (NISQ) architectures. The Proje...
Engineering the Environment of a Superconducting Qubit with an Artificial Giant Atom
Jingjing Hu, Dengfeng Li, Yufan Qie +4 more·Oct 20, 2024
In quantum computing, precise control of system-environment coupling is essential for high-fidelity gates, measurements, and networking. We present an architecture that employs an artificial giant atom from waveguide quantum electrodynamics to tailor...
Measurement-free, scalable, and fault-tolerant universal quantum computing.
Friederike Butt, David F. Locher, Katharina Brechtelsbauer +2 more·Oct 17, 2024
Reliable execution of large-scale quantum algorithms requires robust underlying operations, which is addressed by quantum error correction (QEC). Most modern QEC protocols rely on measurements and feed-forward operations, which are experimentally dem...
Dynamical weight reduction of Pauli measurements
J. M. D. L. Fuente·Oct 16, 2024
Many routines that one might want to run on a quantum computer can benefit from adaptive circuits, relying on mid-circuit measurements and feed-forward operations. Any such measurement has to be compiled into a sequence of elementary gates involving ...
Agnostic Process Tomography
Chirag Wadhwa, Laura Lewis, Elham Kashefi +1 more·Oct 15, 2024
Characterizing a quantum system by learning its state or evolution is a fundamental problem in quantum physics and learning theory with a myriad of applications. Recently, as a new approach to this problem, the task of agnostic state tomography was d...
Stochastic resetting in discrete-time quantum dynamics: steady states and correlations in few-qubit systems
Sascha Wald, Louie Hong Yao, Thierry Platini +2 more·Oct 15, 2024
Time evolution in several classes of quantum devices is generated through the application of quantum gates. Resetting is a critical technological feature in these systems allowing for mid-circuit measurement and complete or partial qubit reset. The p...