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 Gates of Detuned Cat Qubit
A. Schlabes, R. Bhowmick, M. H. Ansari·Jul 30, 2024
Cat qubits have emerged as a promising candidate for quantum computation due to their higher error-correction thresholds and low resource overheads. In existing literature, the detuning of the two-photon drive is assumed to be zero for implementing s...
Scaling of contraction costs for entanglement renormalization algorithms including tensor Trotterization and variational Monte Carlo
Thomas Barthel, Q. Miao·Jul 30, 2024
The multi-scale entanglement renormalization ansatz (MERA) is a hierarchical class of tensor network states motivated by the real-space renormalization group. It is used to simulate strongly correlated quantum many-body systems. For prominent MERA st...
Quantum simulation via stochastic combination of unitaries
Joseph Peetz, Scott E. Smart, P. Narang·Jul 30, 2024
Quantum simulation algorithms often require numerous ancilla qubits and deep circuits, prohibitive for near-term hardware. We introduce a framework for simulating quantum channels using ensembles of low-depth circuits in place of many-qubit dilatio...
Auxiliary-Free Replica Shadows: Efficient Estimation of Multiple Nonlinear Quantum Properties
Qing Liu, Zihao Li, Xiao Yuan +2 more·Jul 30, 2024
Efficient estimation of nonlinear properties is a significant yet challenging task from quantum information processing to many-body physics. Current methodologies often suffer from an exponential sampling cost or require auxiliary qubits and deep qua...
AI Methods for Approximate Compiling of Unitaries
David Kremer, Victor Villar, Sanjay Vishwakarma +2 more·Jul 30, 2024
This paper explores artificial intelligence (AI) methods for the approximate compiling of unitaries, focusing on the use of fixed two-qubit gates and arbitrary single-qubit rotations typical in superconducting hardware. Our approach involves three ma...
On multivariate polynomials achievable with quantum signal processing
Lorenzo Laneve, Stefan Wolf·Jul 30, 2024
Quantum signal processing (QSP) is a framework which was proven to unify and simplify a large number of known quantum algorithms, as well as discovering new ones. QSP allows one to transform a signal embedded in a given unitary using polynomials. Cha...
Projected entangled pair states with flexible geometry
Siddhartha Patra, Sukhbinder Singh, Rom'an Or'us·Jul 30, 2024
Projected entangled pair states (PEPS) are a class of quantum many-body states that generalize matrix product states for one-dimensional systems to higher dimensions. In recent years, PEPS have advanced understanding of strongly correlated systems, e...
Elastic scattering of twisted electrons by CO$_2$ molecules at high energies
Raul Sheldon Pinto, Rakesh Choubisa·Jul 29, 2024
Elastic scattering of a twisted (Bessel) electron beam by CO$_2$ molecules is studied theoretically at high energies. The molecule's structure is optimized using coupled cluster theory and density functional theory with correlation-consistent and Pop...
Search for QCD axion dark matter with transmon qubits and quantum circuit
Shion Chen, Hajime Fukuda, Toshiaki Inada +3 more·Jul 29, 2024
We propose a direct axion dark matter (DM) search using superconducting transmon qubits as quantum sensors. With an external magnetic field applied, axion DM generates an oscillating electric field which causes the excitation of the qubit; such an ex...
Efficient Circuit-Based Quantum State Tomography via Sparse Entry Optimization
Chi-Kwong Li, Kevin Yipu Wu, Zherui Zhang·Jul 29, 2024
Many quantum states arising in algorithms and physical systems occupy only a small, structured subset of the exponentially large Hilbert space, yet standard quantum state tomography fails to exploit this structure. We present an efficient circuit-bas...
Entanglement dynamics of a two-qutrits system coupled to a spin chain
Seyed Mohsen Moosavi Khansari, Fazlollah Kazemi Hasanvand·Jul 29, 2024
In this paper, we investigate the entanglement dynamics of a two qutrits system interacting with a spin environment. Using negativity as the entanglement measure, we study the entanglement dynamics of the system. The calculations show that in cases w...
Realization of high-fidelity perfect entangler between remote superconducting quantum processors
Juan Song, Shuang Yang, Pei Liu +7 more·Jul 29, 2024
Superconducting qubits, a promising candidate for universal quantum computing, currently face limitations in chip size due to reproducibility, wiring complexity, and packaging modes. Distributed quantum modules offer a viable strategy for constructin...
A Brief Introduction to Quantum Network Control
V. Valls, Panagiotis Promponas, L. Tassiulas·Jul 29, 2024
Quantum networking is an emerging area with the potential to transform information processing and communications. In this article, we present a brief introduction to quantum network control, an area in quantum networking dedicated to designing algori...
Strong coherent ion-electron coupling using a wire data bus
Baiyi Yu, R. Betzholz, Jianming Cai·Jul 29, 2024
Ion-ion coupling over long distances represents a highly useful resource for quantum technologies, for example, to sympathetically cool or interconnect qubits in ion-based quantum-computing architectures. In this respect, the recently demonstrated wi...
Distributed Quantum Approximate Optimization Algorithm on a Quantum-Centric Supercomputing Architecture
Seongmin Kim, V. Pascuzzi, Zhihao Xu +3 more·Jul 29, 2024
Quantum approximate optimization algorithm (QAOA) has shown promise in solving combinatorial optimization problems by providing quantum speedup on near-term gate-based quantum computing systems. However, QAOA faces challenges for high-dimensional pro...
Impact of Parallel Gating on Gate Fidelities in Linear, Square, and Star Arrays of Noisy Flip‐Flop Qubits
M. De Michielis, E. Ferraro·Jul 29, 2024
Successfully implementing a quantum algorithm involves maintaining a low logical error rate by ensuring the validity of the quantum fault‐tolerance theorem. The required number of physical qubits arranged in an array depends on the chosen Quantum Err...
Benchmarking and Fidelity Response Theory of High-Fidelity Rydberg Entangling Gates
R. Tsai, Xiangkai Sun, Adam L. Shaw +2 more·Jul 29, 2024
The fidelity of entangling operations is a key figure of merit in quantum information processing, especially in the context of quantum error correction. High-fidelity entangling gates in neutral atoms have seen remarkable advancement recently. A full...
Trainability maximization using estimation of distribution algorithms assisted by surrogate modelling for quantum architecture search
Vicente P. Soloviev, V. Dunjko, C. Bielza +2 more·Jul 29, 2024
Quantum architecture search (QAS) involves optimizing both the quantum parametric circuit configuration but also its parameters for a variational quantum algorithm. Thus, the problem is known to be multi-level as the performance of a given architectu...
Solving QUBOs with a quantum-amenable branch and bound method
Thomas Haner, Kyle E. C. Booth, S.E. Borujeni +1 more·Jul 29, 2024
Due to the expected disparity in quantum vs. classical clock speeds, quantum advantage for branch and bound algorithms is more likely achievable in settings involving large search trees and low operator evaluation costs. Therefore, in this paper, we ...
Quantum algorithm for testing graph completeness
Sara Giordano, M. Martin-Delgado·Jul 29, 2024
Testing graph completeness is a critical problem in computer science and network theory. Leveraging quantum computation, we present an efficient algorithm using the Szegedy quantum walk and quantum phase estimation (QPE). Our algorithm, which takes t...