Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Variational quantum simulation of long-range interacting systems
Chufan Lyu, Xiaoyue Tang, Junning Li +3 more·Mar 27, 2022
Current quantum simulators suffer from multiple limitations such as short coherence time, noisy operations, faulty readout and restricted qubit connectivity in some platforms. Variational quantum algorithms are the most promising approach in near-ter...
Multiqubit Toffoli Gates and Optimal Geometry with Rydberg Atoms
Dongmin Yu, Han Wang, Jin-ming Liu +3 more·Mar 27, 2022
Due to its potential for implementing a scalable quantum computer, multiqubit Toffoli gate lies in the heart of quantum information processing. In this article, we demonstrate a multiqubit blockade gate with atoms arranged in a three-dimension sphero...
Quantum annealing with pairs of $^2\Sigma$ molecules as qubits
Kasra Asnaashari, R. Krems·Mar 27, 2022
The rotational and fine structure of open-shell molecules in a $\Sigma$ electronic state gives rise to crossings between Zeeman states of different parity. These crossings become avoided in the presence of an electric field. We propose an algorithm t...
Simulating open quantum many-body systems using optimised circuits in digital quantum simulation
Minjae Jo, Myungshik S. Kim·Mar 27, 2022
Digital quantum computers are potentially an ideal platform for simulating open quantum many-body systems beyond the digital classical computers. Many studies have focused on obtaining the ground state by simulating time dynamics or variational appro...
A high-fidelity quantum matter-link between ion-trap microchip modules
M. Akhtar, F. Bonus, F. R. Lebrun-Gallagher +7 more·Mar 26, 2022
System scalability is fundamental for large-scale quantum computers (QCs) and is being pursued over a variety of hardware platforms. For QCs based on trapped ions, architectures such as the quantum charge-coupled device (QCCD) are used to scale the n...
A Quantum Optimization Algorithm for Single Machine Total Weighted Tardiness Minimization
Youhao Wang, Ju-Tzu Cheng·Mar 26, 2022
Since quantum computers were proposed in the 1980’s, quantum computing has attracted widespread interest as it appears to be more powerful than classical computing, especially for certain types of problems. One such example of quantum computing’s pow...
Locating quantum critical points with shallow quantum circuits
Zhiyuan Shi, Fang-Gang Duan, Dan-Bo Zhang·Mar 26, 2022
Quantum critical point is one key concept for studying many-body physics but its investigation may be resource-demanding even for a quantum computer due to the intrinsic complexity. In this paper, we propose an approach based on variational quantum e...
Modular quantum circuits for secure communication
Andrea Ceschini, A. Rosato, M. Panella·Mar 26, 2022
Quasi‐chaotic generators are used for producing a pseudorandom behaviour that can be used for encryption/decryption and secure communications, introducing an implementation of them based on quantum technology. Namely, the authors propose a quasi‐chao...
Classically-Boosted Quantum Optimization Algorithm
Guoming Wang·Mar 25, 2022
Considerable effort has been made recently in the development of heuristic quantum algorithms for solving combinatorial optimization problems. Meanwhile, these problems have been studied extensively in classical computing for decades. In this paper, ...
A Gauss-Newton based Quantum Algorithm for Combinatorial Optimization
Mitsuharu Takeori, Takahiro Yamamoto, R. Ohira +1 more·Mar 25, 2022
In this work, we present a Gauss-Newton based quantum algorithm (GNQA) for combinatorial optimization problems that, under optimal conditions, rapidly converges towards one of the optimal solutions without being trapped in local minima or plateaus. Q...
Accelerating Simulation of Quantum Circuits under Noise via Computational Reuse
M. Wang, Ruirui C. Huang, Swamit S. Tannu +1 more·Mar 25, 2022
To realize the full potential of quantum computers, we must mitigate qubit errors by developing noise-aware algorithms, compilers, and architectures. Thus, simulating quantum programs on high-performance computing (HPC) systems with different noise m...
New Quantum Algorithms for Computing Quantum Entropies and Distances
Qisheng Wang, J. Guan, Junyi Liu +2 more·Mar 25, 2022
We propose a series of quantum algorithms for computing a wide range of quantum entropies and distances, including the von Neumann entropy, quantum Rényi entropy, trace distance, and fidelity. The proposed algorithms significantly outperform the prio...
Compositional optimization of quantum circuits for quantum kernels of support vector machines
E. Torabian, R. Krems·Mar 25, 2022
While quantum machine learning (ML) has been proposed to be one of the most promising applications of quantum computing, how to build quantum ML models that outperform classical ML remains a major open question. Here, we demonstrate a Bayesian algori...
Implementation of a two-stroke quantum heat engine with a collisional model
F. V. Melo, Nahum S'a, I. Roditi +4 more·Mar 25, 2022
We put forth a quantum simulation of a stroboscopic two-stroke thermal engine in the IBMQ processor. The system consists of a quantum spin chain connected to two baths at their boundaries, prepared at different temperatures using the variational quan...
Quantum‐Accelerated Algorithms for Generating Random Primitive Polynomials Over Finite Fields
Shan Huang, Hua‐Lei Yin, Zeng‐Bing Chen +1 more·Mar 24, 2022
Primitive polynomials over finite fields are crucial resources with broad applications across various domains in computer science, including classical pseudo‐random number generation, coding theory, and post‐quantum cryptography. Nevertheless, the pu...
Photon-pair blockade in a Josephson-photonics circuit with two nondegenerate microwave resonators
Shengli Ma, Ji-kun Xie, Ya-long Ren +2 more·Mar 24, 2022
We propose to generate photon-pair blockade in a Josephson-photonics circuit that consists of a dc voltage-biased Josephson junction in series with a superconducting charge qubit and two nondegenerate microwave resonators. The two-level charge qubit ...
Feature selection on quantum computers
Sascha Mucke, R. Heese, Sabine Muller +2 more·Mar 24, 2022
In machine learning, fewer features reduce model complexity. Carefully assessing the influence of each input feature on the model quality is therefore a crucial preprocessing step. We propose a novel feature selection algorithm based on a quadratic u...
Looped Pipelines Enabling Effective 3D Qubit Lattices in a Strictly 2D Device
Z. Cai, A. Siegel, S. Benjamin·Mar 24, 2022
Many quantum computing platforms are based on a two-dimensional physical layout. Here we explore a concept called looped pipelines which permits one to obtain many of the advantages of a 3D lattice while operating a strictly 2D device. The concept le...
Visualizing quantum mechanics in an interactive simulation – Virtual Lab by Quantum Flytrap
P. Migdal, Klementyna Jankiewicz, Pawel Grabarz +2 more·Mar 24, 2022
Abstract. Virtual Lab by Quantum Flytrap is a no-code online laboratory of an optical table, presenting quantum phenomena interactively and intuitively. It supports a real-time simulation of up to three entangled photons. Users can place typical opti...
Encoding quantum bits in bound electronic states of a graphene nanotorus
J. Furtado, A. Ramos, J. E. G. Silva +2 more·Mar 24, 2022
We propose to use the quantum states of an electron trapped on the inner surface of a graphene nanotorus to realize as a new kind of physical quantum bit, which can be used to encode quantum information. Fundamental tasks for quantum information proc...