Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Learning to classify quantum phases of matter with a few measurements
Mehran Khosrojerdi, Jason L. Pereira, A. Cuccoli +1 more·Sep 8, 2024
We study the identification of quantum phases of matter, at zero temperature, when only part of the phase diagram is known in advance. Following a supervised learning approach, we show how to use our previous knowledge to construct an observable capa...
Towards Distributed Quantum Error Correction for Distributed Quantum Computing
Shahram Babaie, Chunming Qiao·Sep 8, 2024
Quantum computing as a promising technology can utilize stochastic solutions instead of deterministic approaches for complicated scenarios for which classical computing is inefficient, provided that both the concerns of the error-prone nature of qubi...
Fast Multiplexed Superconducting-Qubit Readout with Intrinsic Purcell Filtering Using a Multiconductor Transmission Line
P. A. Spring, Luka Milanovic, Y. Sunada +4 more·Sep 8, 2024
Fast and accurate qubit measurement remains a critical challenge on the path to fault-tolerant quantum computing. In superconducting quantum circuits, fast qubit measurement has been achieved using a dispersively coupled resonator with a large extern...
Generalized Parity Measurements and Efficient Large Multi-component Cat State Preparation with Quantum Signal Processing
Sina Zeytinoğlu·Sep 8, 2024
Generalized parity measurements are instrumental for the preparation of non-trivial quantum states and the detection of errors in error correction codes. Here, we detail a proposal for efficient and robust generalized parity measurements based on Qua...
Simulating kaon mixing with Josephson phase qubits
Andrei Galiautdinov·Sep 7, 2024
Superconducting circuits with Josephson junctions distinguish themselves from other types of quantum computing architectures by having easily controllable metastable computational states (the so-called phase qubits) with a very large ratio of their r...
An efficient finite-resource formulation of non-Abelian lattice gauge theories beyond one dimension
Pierpaolo Fontana, Marc Miranda Riaza, Alessio Celi·Sep 6, 2024
Non-Abelian gauge theories provide the most accurate description of fundamental interactions, showing remarkable agreement with experimental data in cosmology and particle physics. Highly precise predictions can be made using standard techniques, bot...
Stories in the two-state vector formalism
Patryk Michalski, Andrzej Dragan·Sep 6, 2024
The two-state vector formalism of quantum mechanics is a time-symmetrized approach to standard quantum theory. In our work, we aim to establish rigorous foundations for the future investigation within this formalism. We introduce the concept of a sto...
Recovering optimal precision in quantum sensing with time domain imperfections
Zi-Shen Li, Xinyue Long, Xiaodong Yang +2 more·Sep 6, 2024
Quantum control plays a crucial role in enhancing precision scaling for quantum sensing. However, most existing protocols require perfect control, even though real-world devices inevitably have control imperfections. Here, we consider a fundamental s...
Squeezing Enhancement in Lossy Multi-Path Atom Interferometers
Julian Günther, Jan-Niclas Kirsten-Siemß, Naceur Gaaloul +1 more·Sep 6, 2024
This paper explores the sensitivity gains afforded by spin-squeezed states in atom interferometry, in particular using Bragg diffraction. We introduce a generalised input-output formalism that accurately describes realistic, non-unitary interferomete...
Analog quantum simulation of coupled electron-nuclear dynamics in molecules
Jong-Kwon Ha, R. MacDonell·Sep 6, 2024
Quantum computing has the potential to reduce the computational cost required for quantum dynamics simulations. However, existing quantum algorithms for coupled electron-nuclear dynamics simulation either require fault-tolerant devices, or involve th...
Expressing and Analyzing Quantum Algorithms with Qualtran
M. Harrigan, T. Khattar, Charles Yuan +5 more·Sep 6, 2024
Quantum computing's transition from theory to reality has spurred the need for novel software tools to manage the increasing complexity, sophistication, toil, and fallibility of quantum algorithm development. We present Qualtran, an open-source libra...
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...