Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Escaping Barren Plateau: Co-Exploration of Quantum Circuit Parameters and Architectures
Yipei Liu, Yuhong Song, Jinyang Li +4 more·Jan 22, 2025
Barren plateaus (BP), characterized by exponentially vanishing gradients that hinder the training of variational quantum circuits (VQC), present a pervasive and critical challenge in applying variational quantum algorithms to real-world applications....
Classical and quantum algorithms for characters of the symmetric group
S. Bravyi, David Gosset, Vojtěch Havlíček +1 more·Jan 22, 2025
Characters of irreducible representations are ubiquitous in group theory. However, computing characters of some groups such as the symmetric group $S_n$ is a challenging problem known to be $\#P$-hard in the worst case. Here we describe a Matrix Prod...
Improving Figures of Merit for Quantum Circuit Compilation
Patrick Hopf, Nils Quetschlich, L. Schulz +1 more·Jan 22, 2025
Quantum computing is an emerging technology that has seen significant software and hardware improvements in recent years. Executing a quantum program requires the compilation of its quantum circuit for a target Quantum Processing Unit (QPU). Various ...
Non-zero noise extrapolation: accurately simulating noisy quantum circuits with tensor networks
A. Thompson, Arie Soeteman, Chris Cade +1 more·Jan 22, 2025
Understanding the effects of noise on quantum computations is fundamental to the development of quantum hardware and quantum algorithms. Simulation tools are essential for quantitatively modelling these effects, yet unless artificial restrictions are...
Efficient simulation of parametrized quantum circuits under non-unital noise through Pauli backpropagation
Victor Martinez, Armando Angrisani, E. Pankovets +2 more·Jan 22, 2025
As quantum devices continue to grow in size but remain affected by noise, it is crucial to determine when and how they can outperform classical computers on practical tasks. A central piece in this effort is to develop the most efficient classical si...
Fully quantum inflation: quantum marginal problem constraints in the service of causal inference
Isaac D. Smith, Elie Wolfe, Robert W. Spekkens·Jan 21, 2025
Consider the problem of deciding, for a particular multipartite quantum state, whether or not it is realizable in a quantum network with a particular causal structure. This is a fully quantum version of what causal inference researchers refer to as t...
Binary integer programming for optimizing ebit cost in distributed quantum circuits with fixed module allocation
Hyunho Cha, Jungwoo Lee·Jan 21, 2025
Modular and networked quantum architectures can scale beyond the qubit count of a single device, but executing a circuit across modules requires implementing non-local two-qubit gates using shared entanglement (ebits) and classical communication, mak...
Cavity-mode initialization via a Rabi-driven qubit
N. Karaev, E. Blumenthal, G. Moshel +2 more·Jan 21, 2025
Microwave cavity modes with long coherence times are used in many different quantum computing systems. During normal operation of such systems, these modes, called memory modes, often need to be set to different coherent photonic occupations. In this...
Practical scheme for efficient distillation of GHZ states
'Aron Rozgonyi, G'abor Sz'echenyi, Orsolya K'alm'an +1 more·Jan 21, 2025
We develop an efficient local operation and classical communication (LOCC) scheme for the distillation of Greenberger-Horne-Zeilinger (GHZ) states from tripartite systems subjected to both coherent and incoherent errors. The proposed method employs a...
Quantum Compressive Sensing Meets Quantum Noise: A Practical Exploration
Naveed Naimipour, Collin C. D. Frink, Harry C. Shaw +2 more·Jan 21, 2025
Compressive sensing is a signal processing technique that enables the reconstruction of sparse signals from a limited number of measurements, leveraging the signal's inherent sparsity to facilitate efficient recovery. Recent works on the Quantum Comp...
QuSplit: achieving both high fidelity and throughput via job splitting on noisy quantum computers
Jinyang Li, Yuhong Song, Yipei Liu +4 more·Jan 21, 2025
With the progression into the quantum utility era, computing is shifting toward quantum-centric architectures, where multiple quantum processors collaborate with classical computing resources. Platforms such as IBM Quantum and Amazon Braket exemplify...
Efficient Compilation for Shuttling Trapped-Ion Machines via the Position Graph Architectural Abstraction
Bao Gia Bach, Ilya Safro, Ed Younis·Jan 21, 2025
With the growth of quantum platforms for gate-based quantum computation, compilation holds a crucial factor in deciding the success of the implementation. There has been rich research and development in compilation techniques for the superconducting-...
Quantum machine learning with Adaptive Boson Sampling via post-selection
Francesco Hoch, E. Caruccio, G. Rodari +18 more·Jan 21, 2025
The implementation of large-scale universal quantum computation represents a challenging and ambitious task on the road to quantum processing of information. In recent years, an intermediate approach has been pursued to demonstrate quantum computatio...
Solving Constrained Optimization Problems Using Hybrid Qubit-Qumode Quantum Devices
Rishab Dutta, Brandon Allen, Chuzhi Xu +8 more·Jan 20, 2025
Variational Quantum Algorithms (VQAs) provide a promising framework for tackling complex optimization problems on near-term quantum hardware. Here, we demonstrate that hybrid qubit--qumode quantum devices offer an efficient route to solving Quadratic...
On the issues arising when defining an X gate for qudits: Extending the Bit-Flip Channel to $d$-dimensional systems
Jean F. Gomez, Hermann L. Albrecht·Jan 20, 2025
Given the current interest in quantum information tasks involving higher-dimensional systems, we discuss issues that appear when extending the bit-flip channel to qutrit systems. The difficulties arise from the different interpretations of the Pauli ...
Independent stabilizer Rényi entropy and entanglement fluctuations in random unitary circuits
Dominik Szombathy, Angelo Valli, Cătălin Paşcu Moca +2 more·Jan 20, 2025
We investigate numerically the joint distribution of magic ($M$) and entanglement ($S$) in $N$-qubit Haar-random quantum states. The distribution $P_N(M,S)$ as well as the marginals become exponentially localized, and centered around the values $\til...
Dirac Fermions and Flat Bands in Phosphorus Carbide Nanotubes: Structural and Quantum Phase Transitions in a Quasi-One-Dimensional Material
Shivam Sharma, Chenhaoyue Wang, Hsuan Ming Yu +1 more·Jan 20, 2025
Chemically realistic quasi-one-dimensional (1D) materials in which Dirac fermions and highly degenerate flat bands coexist intrinsically at the Fermi level are exceedingly rare, while representing a highly desirable platform for correlated and topolo...
Riemannian Optimization for Holevo Capacity
Chengkai Zhu, Renfeng Peng, Bin Gao +1 more·Jan 20, 2025
Computing the classical capacity of a noisy quantum channel is crucial for understanding the limits of communication over quantum channels. However, its evaluation remains challenging due to the difficulty of computing the Holevo capacity and the eve...
PIMutation: Exploring the Potential of Real PIM Architecture for Quantum Circuit Simulation
Dongin Lee, Enhyeok Jang, Seungwoo Choi +3 more·Jan 20, 2025
Quantum circuit simulations are essential for the verification of quantum algorithms on behalf of real quantum devices. However, the memory requirements for such simulations grow exponentially with the number of qubits involved in quantum programs. M...
Quantum Zeno blockade in optomechanical systems
Karl Pelka, Andr'e Xuereb·Jan 20, 2025
We investigate the application of the quantum Zeno effect (QZE) for the preparation of non-Gaussian states in optomechanical systems. By frequently monitoring the system, the QZE can suppress transitions away from desired subspaces of states. We show...