Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum correlations in the steady state of light-emitter ensembles from perturbation theory
Dolf Huybrechts, Tommaso Roscilde·Feb 26, 2024
The coupling of a quantum system to an environment leads generally to decoherence, and it is detrimental to quantum correlations within the system itself. Yet some forms of quantum correlations can be robust to the presence of an environment - or may...
Entanglement-breaking channels are a quantum memory resource
Lucas B. Vieira, Huan-Yu Ku, Costantino Budroni·Feb 26, 2024
Entanglement-breaking channels (equivalently, measure-and-prepare channels) are an important class of quantum operations noted for their ability to destroy multipartite spatial quantum correlations. Inspired by this property, they have also been empl...
Universal, unambiguous concentration and distillation of Bell pairs
Orsolya Kálmán, Aurél Gábris, Igor Jex +1 more·Feb 26, 2024
The ability of preparing perfect Bell pairs with a practical scheme is of great relevance for quantum communication as well as distributed quantum computing. We propose a scheme which probabilistically, but unambiguously produces the $\left|Φ_{+}\rig...
Estimating the electrical energy cost of performing arbitrary state preparation using qubits and qudits in integrated photonic circuits
Maria Carolina Volpato, Gabriel da Silva Sampaio, Pierre-Louis de Assis·Feb 26, 2024
As quantum photonic hardware scales toward computationally relevant sizes, energy consumption has emerged as a key constraint. Programmable photonic integrated circuits, composed of interferometer meshes with tunable phase modulators, provide a flexi...
Probing anyonic statistics via Mach-Zehnder interferometry in quantum computers
Shiyu Zhou, Yi Teng, C. Chamon +2 more·Feb 26, 2024
We introduce a synthetic Mach-Zehnder interferometer for digitized quantum computing devices to probe fractional exchange statistics of anyonic excitations that appear in quantum spin liquids. Employing an IonQ quantum computer, we apply this scheme ...
Mitigating errors in dc magnetometry via zero-noise extrapolation
J. V. Van Dyke, Zack White, G. Quiroz·Feb 26, 2024
Zero-noise extrapolation (ZNE), a technique to estimate quantum circuit expectation values through noise scaling and extrapolation, is well-studied in the context of quantum computing. We examine the applicability of ZNE to the field of quantum sensi...
Trapped ion qubit and clock operations with a visible wavelength photonic coil resonator stabilized integrated Brillouin laser
Nitesh Chauhan, Christopher Caron, Jiawei Wang +5 more·Feb 26, 2024
Integrating precise, stable, ultra-low noise visible light lasers into atomic systems is critical for advancing quantum information sciences and improving scalability and portability. Trapped ions are a leading approach for high-fidelity quantum comp...
Quantum error thresholds for gauge-redundant digitizations of lattice field theories
M. Carena, Henry Lamm, Ying-Ying Li +1 more·Feb 26, 2024
In the quantum simulation of lattice gauge theories, gauge symmetry can be either fixed or encoded as a redundancy of the Hilbert space. While gauge-fixing reduces the number of qubits, keeping the gauge redundancy can provide code space to mitigate ...
Flying-cat parity checks for quantum error correction
Z. M. McIntyre, W. Coish·Feb 26, 2024
Long range, multiqubit parity checks have applications in both quantum error correction and measurement-based entanglement generation. Such parity checks could be performed using qubit-state-dependent phase shifts on propagating pulses of light descr...
Modeling error correction with Lindblad dynamics and approximate channels
Zohar Schwartzman-Nowik, Liran Shirizly, Haggai Landa·Feb 26, 2024
We analyze the performance of a quantum error correction code subject to physically motivated noise modeled by a Lindblad master equation. We consider dissipative and coherent single-qubit terms and two-qubit crosstalk, studying how different approxi...
Integer programming using a single atom
Kapil Goswami, P. Schmelcher, Rick Mukherjee·Feb 26, 2024
Integer programming (IP), as the name suggests is an integer-variable-based approach commonly used to formulate real-world optimization problems with constraints. Currently, quantum algorithms reformulate the IP into an unconstrained form through the...
Quantum Transformer: Accelerating model inference via quantum linear algebra
N. Guo, Zhan Yu, M. Choi +5 more·Feb 26, 2024
Powerful generative artificial intelligence from large language models (LLMs) harnesses extensive computational resources for inference. In this work, we investigate the transformer architecture, a key component of these models, under the lens of fau...
An Optimal Tradeoff between Entanglement and Copy Complexity for State Tomography
Sitan Chen, Jungshian Li, Allen Liu·Feb 26, 2024
There has been significant interest in understanding how practical constraints on contemporary quantum devices impact the complexity of quantum learning. For the classic question of tomography, recent work tightly characterized the copy complexity fo...
Efficient quantum lattice gas automata
Antonio David Bastida Zamora, L. Budinski, Ossi Niemimäki +1 more·Feb 26, 2024
This study presents a novel quantum algorithm for lattice gas automata simulation with a single time step, demonstrating logarithmic complexity in terms of $CX$ gates. The algorithm is composed of three main steps: collision, mapping, and propagation...
Quantum subroutine for variance estimation: algorithmic design and applications
Anna Bernasconi, Alessandro Berti, Gianna M. Del Corso +2 more·Feb 26, 2024
Quantum computing sets the foundation for new ways of designing algorithms, thanks to the peculiar properties inherited by quantum mechanics. The exploration of this new paradigm faces new challenges concerning which field quantum speedup can be achi...
Noisy Quantum Simulation: Performance and Resource Considerations for the Tavis-Cummings and Heisenberg Models
Alisa Haukisalmi, Daniel Paz Ramos, M. Raasakka +3 more·Feb 26, 2024
Fault-tolerant quantum computers promise the simulation of complex quantum systems beyond the reach of classical computation. In contrast, current noisy intermediate-scale quantum (NISQ) devices are constrained by hardware noise. Consequently, quantu...
Multiplexed Entanglement of Multi-emitter Quantum Network Nodes
A. Ruskuc, C. Wu, E. Green +3 more·Feb 25, 2024
Quantum networks that distribute entanglement among remote nodes will unlock transformational technologies in quantum computing, communication, and sensing. However, state-of-the-art networks utilize only a single optically-addressed qubit per node; ...
Universal quantum operations and ancilla-based read-out for tweezer clocks
Ran Finkelstein, R. Tsai, Xiangkai Sun +6 more·Feb 25, 2024
Enhancing the precision of measurements by harnessing entanglement is a long-sought goal in quantum metrology1,2. Yet attaining the best sensitivity allowed by quantum theory in the presence of noise is an outstanding challenge, requiring optimal pro...
Quantum Hybrid Diffusion Models for Image Synthesis
Francesca De Falco, Andrea Ceschini, A. Sebastianelli +2 more·Feb 25, 2024
In this paper, we propose a new methodology to design quantum hybrid diffusion models, derived from classical U-Nets with ResNet and Attention layers. Specifically, we propose two possible different hybridization schemes combining quantum computing’s...
The Qubit Information Logic Theory for Understanding Multi‐Qubit Entanglement and Designing Exotic Entangled States
Zixuan Hu, S. Kais·Feb 24, 2024
A “qubit information logic” (QIL) theory is developed that uses the “qubit information equation” (QIE) and logic to describe the correlation behaviors of multi‐qubit entanglement. Introducing the “global information status” and “local information ava...