Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Lightcone shading for classically accelerated quantum error mitigation
Andrew Eddins, M. C. Tran, Patrick Rall·Sep 6, 2024
Quantum error mitigation (QEM) can recover accurate expectation values from a noisy quantum computer by trading off bias for variance, such that an averaged result is more accurate but takes longer to converge. Probabilistic error cancellation (PEC) ...
CMOS compatibility of semiconductor spin qubits
N. D. Stuyck, A. Saraiva, W. Gilbert +7 more·Sep 6, 2024
Several domains of society will be disrupted once millions of high-quality qubits can be brought together to perform fault-tolerant quantum computing (FTQC). All quantum computing hardware available today is many orders of magnitude removed from the ...
Demonstration of quantum computation and error correction with a tesseract code
Ben W. Reichardt, D. Aasen, R. Chao +15 more·Sep 6, 2024
A critical milestone for quantum computers is to demonstrate fault-tolerant computation that outperforms computation on physical qubits. The tesseract subsystem color code protects four logical qubits in 16 physical qubits, to distance four. Using th...
Entropy-driven entanglement forging
Axel P'erez-Obiol, S. Masot-Llima, Antonio M. Romero +4 more·Sep 6, 2024
Simulating physical systems with variational quantum algorithms is a well-studied approach, but it is challenging to implement in current devices due to demands in qubit number and circuit depth. We show how limited knowledge of the system, namely th...
Experimental Quantum Simulation of Chemical Dynamics.
T. Navickas, R. MacDonell, C. Valahu +10 more·Sep 6, 2024
Accurate simulation of dynamic processes in molecules and reactions is among the most challenging problems in quantum chemistry. Quantum computers promise efficient chemical simulation, but the existing quantum algorithms require many logical qubits ...
Distributed exact multi-objective quantum search algorithm
Hao Li, Daowen Qiu, Leon Luo·Sep 6, 2024
Multi-objective search means searching for any one of several objectives in an unstructured database. Grover's algorithm has quadratic acceleration in multi-objection search than classical ones. Iterated operator in Grover's algorithm is a key elemen...
Qubit magic-breaking channels
Ayan K. Patra, Rivu Gupta, Alessandro Ferraro +1 more·Sep 6, 2024
We develop a notion of quantum channels that can make states useless for universal quantum computation by destroying their magic (non-stabilizerness) - we refer to them as magic-breaking channels. We establish the properties of these channels in arbi...
Generalized geometric speed limits for quantum observables
J. Bringewatt, Zach Steffen, Martin Ritter +6 more·Sep 6, 2024
Leveraging quantum information geometry, we derive generalized quantum speed limits on the rate of change of the expectation values of observables. These bounds subsume and, for Hilbert space dimension $\geq 3$, tighten existing bounds -- in some cas...
Geometrical Approach to Logical Qubit Fidelities of Neutral Atom CSS Codes
Jasper J. Postema, S. Kokkelmans·Sep 6, 2024
Encoding quantum information in a quantum error correction (QEC) code enhances protection against errors. Imperfection of quantum devices due to decoherence effects will limit the fidelity of quantum gate operations. In particular, neutral atom quant...
NMR Protocol for Black-Box Ergotropy Estimation via Feedback Algorithm
Jitendra Joshi, T. S. Mahesh·Sep 6, 2024
Considering the emerging applications of quantum technologies, studying energy storage and usage at the quantum level is of great interest. In this context, there is a significant contemporary interest in studying ergotropy, the maximum amount of wor...
PARALLAX: A Compiler for Neutral Atom Quantum Computers under Hardware Constraints
J. Ludmir, Tirthak Patel·Sep 6, 2024
Among different quantum computing technologies, neutral atom quantum computers have several advantageous features, such as multi-qubit gates, application-specific topologies, movable qubits, homogenous qubits, and long-range interactions. However, ex...
An Equivariant Machine Learning Decoder for 3D Toric Codes
Oliver Weissl, E. Egorov·Sep 6, 2024
Research on mitigating errors in computing and communication systems has grown with their widespread use. In quantum computing, error correction is crucial as errors can quickly propagate, undermining results and the theoretical speedup over classica...
Enhancing Quantum Security over Federated Learning via Post-Quantum Cryptography
Pingzhi Li, Tianlong Chen, Junyu Liu·Sep 6, 2024
Federated learning (FL) has become one of the standard approaches for deploying machine learning models on edge devices, where private training data are distributed across clients, and a shared model is learned by aggregating locally computed updates...
Classical Algorithms for Hamiltonian Dynamics Mean Value and Guided Local Hamiltonian Problem
Yusen Wu, Yukun Zhang, Chuan Wang +1 more·Sep 6, 2024
The efficient simulation of quantum dynamics and ground states is a central challenge in physics and a key frontier for quantum advantage. While short-time evolution in one-dimensional systems can often be simulated classically, extending this to hig...
Low-depth phase oracle using a parallel piecewise circuit
Zhu Sun, Gregory Boyd, Zhenyu Cai +7 more·Sep 6, 2024
We explore the important task of applying a phase $\exp(i\,f(x))$ to a computational basis state $\left| x \right>$. The closely related task of rotating a target qubit by an angle depending on $f(x)$ is also studied. Such operations are key in many ...
Better bounds on finite-order Grothendieck constants
Sébastien Designolle, Tamás Vértesi, Sebastian Pokutta·Sep 5, 2024
Grothendieck constants $K_G(d)$ bound the advantage of $d$-dimensional strategies over $1$-dimensional ones in a specific optimisation task. They have applications ranging from approximation algorithms to quantum nonlocality. However, apart from $d=2...
Rare Events and Griffiths Phases in Topological Quantum Error Correction
Adithya Sriram, Nicholas O'Dea, Yaodong Li +2 more·Sep 5, 2024
The performance of quantum error correcting (QEC) codes are often studied under the assumption of spatio-temporally uniform error rates. On the other hand, experimental implementations almost always produce heterogeneous error rates, in either space ...
Fourier Neural Operators for Learning Dynamics in Quantum Spin Systems
Freya Shah, Taylor L. Patti, Julius Berner +3 more·Sep 5, 2024
Fourier Neural Operators (FNOs) excel on tasks using functional data, such as those originating from partial differential equations. Such characteristics render them an effective approach for simulating the time evolution of quantum wavefunctions, wh...
Bias-field digitized counterdiabatic quantum algorithm for higher-order binary optimization
Sebastián V. Romero, A. Visuri, Alejandro Gomez Cadavid +3 more·Sep 5, 2024
Combinatorial optimization plays a crucial role in many industrial applications. While classical computing often struggles with complex instances, quantum optimization emerges as a promising alternative. Here, we present an enhanced bias-field digiti...
Absorbing state transitions with long-range annihilation
N. O’Dea, Sayak Bhattacharjee, S. Gopalakrishnan +1 more·Sep 5, 2024
We introduce a family of classical stochastic processes describing diffusive particles undergoing branching and long-range annihilation in the presence of a parity constraint. The probability for a pair-annihilation event decays as a power-law in the...