Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Research Communities in cyber security: A Comprehensive Literature Review
Sotirios Katsikeas, Pontus Johnson, M. Ekstedt +1 more·Apr 22, 2021
In order to provide a coherent overview of cyber security research, the Scopus academic abstract and citation database was mined to create a citation graph of 98,373 authors active in the field between 1949 and early 2020. The Louvain community detec...
Quantum variational approach to lattice gauge theory at nonzero density
A. Yamamoto·Apr 21, 2021
The simulation of dense fermionic matters is a long-standing problem in lattice gauge theory. One hopeful solution would be the use of quantum computers. In this paper, digital quantum simulation is designed for lattice gauge theory at nonzero densit...
Fault-tolerant resource estimate for quantum chemical simulations: Case study on Li-ion battery electrolyte molecules
Isaac H. Kim, Ye-Hua Liu, Sam Pallister +3 more·Apr 21, 2021
We estimate the resources required in the fusion-based quantum computing scheme to simulate electrolyte molecules in Li-ion batteries on a fault-tolerant, photonic quantum computer. We focus on the molecules that can provide practical solutions to in...
Tensor Network Quantum Virtual Machine for Simulating Quantum Circuits at Exascale
Thien Nguyen, Dmitry I. Lyakh, E. Dumitrescu +3 more·Apr 21, 2021
The numerical simulation of quantum circuits is an indispensable tool for development, verification, and validation of hybrid quantum-classical algorithms intended for near-term quantum co-processors. The emergence of exascale high-performance comput...
Entanglement Robustness via Spatial Deformation of Identical Particle Wave Functions
Matteo Piccolini, Farzam Nosrati, G. Compagno +3 more·Apr 20, 2021
We address the problem of entanglement protection against surrounding noise by a procedure suitably exploiting spatial indistinguishability of identical subsystems. To this purpose, we take two initially separated and entangled identical qubits inter...
Doubling the Size of Quantum Simulators by Entanglement Forging
A. Eddins, M. Motta, Tanvi P. Gujarati +4 more·Apr 20, 2021
Quantum computers are promising for simulations of chemical and physical systems, but the limited capabilities of today's quantum processors permit only small, and often approximate, simulations. Here we present a method, classical entanglement forgi...
Supervisory Control of Quantum Discrete Event Systems
Daowen Qiu·Apr 20, 2021
Discrete event systems (DES) have been deeply developed and applied in practice, but state complexity in DES still is an important problem to be better solved with innovative methods. With the development of quantum computing and quantum control, a n...
Efficient Measure for the Expressivity of Variational Quantum Algorithms.
Yuxuan Du, Zhuozhuo Tu, Xiao Yuan +1 more·Apr 20, 2021
The superiority of variational quantum algorithms (VQAs) such as quantum neural networks (QNNs) and variational quantum eigensolvers (VQEs) heavily depends on the expressivity of the employed Ansätze. Namely, a simple Ansatz is insufficient to captur...
Prospects for simulating a qudit-based model of (1+1)D scalar QED
Erik J. Gustafson·Apr 20, 2021
We present a gauge invariant digitization of $(1+1)$d scalar quantum electrodynamics for an arbitrary spin truncation for qudit-based quantum computers. We provide a construction of the Trotter operator in terms of a universal qudit-gate set. The cos...
Practical Quantum Error Correction with the XZZX Code and Kerr-Cat Qubits
A. Darmawan, Benjamin J. Brown, A. Grimsmo +2 more·Apr 19, 2021
The development of robust architectures capable of large-scale fault-tolerant quantum computation should consider both their quantum error-correcting codes and the underlying physical qubits upon which they are built, in tandem. Following this design...
Time-inhomogeneous Quantum Walks with Decoherence on Discrete Infinite Spaces
Chia-Han Chou, Wei-Shih Yang·Apr 19, 2021
In quantum computation theory, quantum random walks have been utilized by many quantum search algorithms which provide improved performance over their classical counterparts. However, due to the importance of the quantum decoherence phenomenon, decoh...
Quantum algorithms for SVD-based data representation and analysis
Armando Bellante, Alessandro Luongo, S. Zanero·Apr 19, 2021
This paper narrows the gap between previous literature on quantum linear algebra and practical data analysis on a quantum computer, formalizing quantum procedures that speed-up the solution of eigenproblems for data representations in machine learnin...
Optimizing Continuous-Variable Quantum Key Distribution with Phase-Shift Keying Modulation and Postselection
Florian Kanitschar, C. Pacher·Apr 19, 2021
We use a recent numerical security proof approach to calculate tight secure key rates in the presence of collective attacks for a continuous-variable (CV) eight-state phase-shift keying (8PSK) protocol with heterodyne detection in the asymptotic limi...
When to Build Quantum Software?
Janardan Misra, Vikrant S. Kaulgud, Rupesh Kaslay +1 more·Apr 19, 2021
Despite ongoing advancements in quantum computing, businesses are still faced with the problem to decide if they would benefit from investing into this novel technology for building a business critical application. This uncertainty is not only owing ...
Decoherence-protected quantum register of nuclear spins in diamond
F. J. González, R. Coto·Apr 19, 2021
Solid-state quantum registers are exceptional for storing quantum information at room temperature with long coherence time. Nevertheless, practical applications toward quantum supremacy require even longer coherence time to allow for more complex alg...
Atom-orbital qubit under nonadiabatic holonomic quantum control
Hongmian Shui, S. Jin, Zhihan Li +4 more·Apr 18, 2021
Hongmian Shui‡,1 Shengjie Jin‡,1 Zhihan Li‡,1 Fansu Wei, Xuzong Chen, Xiaopeng Li, 3, ∗ and Xiaoji Zhou 4, † State Key Laboratory of Advanced Optical Communication System and Network, Department of Electronics, Peking University, Beijing 100871, Chin...
Valley splittings in Si/SiGe quantum dots with a germanium spike in the silicon well
T. McJunkin, E. MacQuarrie, L. Tom +11 more·Apr 16, 2021
Silicon-germanium heterostructures have successfully hosted quantum dot qubits, but the intrinsic near-degeneracy of the two lowest valley states poses an obstacle to high fidelity quantum computing. We present a modification to the Si/SiGe heterostr...
Calculation of generating function in many-body systems with quantum computers: technical challenges and use in hybrid quantum-classical methods
E. Guzman, D. Lacroix·Apr 16, 2021
The generating function of a Hamiltonian $H$ is defined as $F(t)=\langle e^{-itH}\rangle$, where $t$ is the time and where the expectation value is taken on a given initial quantum state. This function gives access to the different moments of the Ham...
Robust quantum classifier with minimal overhead
D. Park, Carsten Blank, Francesco Petruccione·Apr 16, 2021
To witness quantum advantages in practical settings, substantial efforts are required not only at the hardware level but also on theoretical research to reduce the computational cost of a given protocol. Quantum computation has the potential to signi...
Maritime Just-in-time navigation with Quantum algorithms
Matthias Imrecke, Fabian Klos, W. Mergenthaler +2 more·Apr 16, 2021
Just-in-time arrival in the maritime industry is a key concept for the reduction of Greenhouse gas emissions and cost-cutting, with the aim to reach the industrywide overall climate goals set by the International Maritime Organization (IMO) for 2030....