Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Third Law of Thermodynamics and the Scaling of Quantum Computers.
L. Buffoni, S. Gherardini, Emmanuel Zambrini Cruzeiro +1 more·Mar 17, 2022
The third law of thermodynamics, also known as the Nernst unattainability principle, puts a fundamental bound on how close a system, whether classical or quantum, can be cooled to a temperature near to absolute zero. On the other hand, a fundamental ...
Probing confinement in a $\mathbb{Z}_2$ lattice gauge theory on a quantum computer
Julius Mildenberger, Wojciech Mruczkiewicz, Jad C. Halimeh +2 more·Mar 16, 2022
Gauge theories describe the fundamental forces in the standard model of particle physics and play an important role in condensed matter physics. The constituents of gauge theories, for example charged matter and electric gauge field, are governed by ...
Quantum simulation with just-in-time compilation
Stavros Efthymiou, M. Lazzarin, Andrea Pasquale +1 more·Mar 16, 2022
Quantum technologies are moving towards the development of novel hardware devices based on quantum bits (qubits). In parallel to the development of quantum devices, efficient simulation tools are needed in order to design and benchmark quantum algori...
Experimental demonstration of high-rate discrete-modulated continuous-variable quantum key distribution system.
Ya Pan, Heng Wang, Yun Shao +5 more·Mar 16, 2022
A high-rate continuous-variable quantum key distribution (CV-QKD) system based on high-order discrete modulation is experimentally investigated. With the help of the novel system scheme, effective digital signal processing (DSP) algorithms and advanc...
Snowmass21 Accelerator Modeling Community White Paper
S. Biedron, L. Brouwer, D. Bruhwiler +22 more·Mar 16, 2022
After a summary of relevant comments and recommendations from various reports over the last ten years, this paper examines the modeling needs in accelerator physics, from the modeling of single beams and individual accelerator elements, to the realiz...
Recursive Variational Quantum Compiling
S. Bilek, Kristian Wold·Mar 16, 2022
Variational quantum compiling (VQC) algorithms aim to approximate deep quantum circuits with shallow parameterized ansatzes, making them more suitable for NISQ hardware. In this article a variant of VQC named the recursive variational quantum compili...
Quantum algorithms from fluctuation theorems: Thermal-state preparation
Zoe Holmes, G. Muraleedharan, R. Somma +2 more·Mar 16, 2022
Fluctuation theorems provide a correspondence between properties of quantum systems in thermal equilibrium and a work distribution arising in a non-equilibrium process that connects two quantum systems with Hamiltonians H0 and H1=H0+V. Building upon ...
Measurement-based quantum computation using two-component BECs
Genji Fujii·Mar 16, 2022
Measurement-based quantum computation (MBQC) using two-component Bose–Einstein condensates (BECs) is proposed in this paper. An arbitrary state for one logical qubit is obtained by three-body measurement. Furthermore, a method is proposed for impleme...
Decoherence predictions in a superconducting quantum processor using the steepest-entropy-ascent quantum thermodynamics framework
J. A. Montañez-Barrera, M. V. von Spakovsky, Cesar E. Damian Ascencio +1 more·Mar 16, 2022
The current stage of quantum computing technology, called noisy intermediate-scale quantum (NISQ) technology, is characterized by large errors that prohibit it from being used for real applications. In these devices, decoherence, one of the main sour...
Resource estimations for the Hamiltonian simulation in correlated electron materials
Shutaroh Kanno, Suguru Endo, T. Utsumi +1 more·Mar 16, 2022
Correlated electron materials, such as superconductors and magnetic materials, are regarded as fascinating targets in quantum computing. However, the quantitative resources, specifically the number of quantum gates and qubits, required to perform a q...
Algorithmic cooling for resolving state preparation and measurement errors in quantum computing
R. Laflamme, Junan Lin, T. Mor·Mar 15, 2022
State preparation and measurement errors are commonly regarded as indistinguishable. The problem of distinguishing state preparation (SPAM) errors from measurement errors is important to the field of characterizing quantum processors. In this work, w...
Combating fluctuations in relaxation times of fixed-frequency transmon qubits with microwave-dressed states
Peng Zhao, Teng Ma, Yirong Jin +1 more·Mar 15, 2022
With the long coherence time, the fixed-frequency transmon qubit is a promising qubit modality for quantum computing. Currently, diverse qubit architectures that utilize fixed-frequency transmon qubits have been demonstrated with high-fidelity gate p...
T-count optimization of approximate quantum Fourier transform
Byeongyong Park, D. Ahn·Mar 15, 2022
The quantum Fourier transform (QFT) is a ubiquitous quantum operation that is used in numerous quantum computing applications. The major obstacle to constructing a QFT circuit is that numerous elementary gates are required. Among the elementary gates...
Quantum computing for data analysis in high energy physics
Andrea Delgado, Kathleen E. Hamilton, Prasanna Date +22 more·Mar 15, 2022
Some of the biggest achievements of the modern era of particle physics, such as the discovery of the Higgs boson, have been made possible by the tremendous effort in building and operating large-scale experiments like the Large Hadron Collider or the...
Error-mitigated simulation of quantum many-body scars on quantum computers with pulse-level control
I. Chen, Ben Burdick, Yongxin Yao +2 more·Mar 15, 2022
Quantum many-body scars are an intriguing dynamical regime in which quantum systems exhibit coherent dynamics and long-range correlations when prepared in certain initial states. We use this combination of coherence and many-body correlations to benc...
Leakage Reduces Device Coherence Demands for Pulse-Level Molecular Simulations
Ayush Asthana, Chenxu Liu, O. R. Meitei +3 more·Mar 14, 2022
Quantum simulation on NISQ devices is severely limited by short coherence times. A variational pulse-shaping algorithm known as ctrl-VQE was recently proposed to address this issue by eliminating the need for parameterized quantum circuits, which lea...
Effective nonlocal parity-dependent couplings in qubit chains
M. Nägele, C. Schweizer, F. Roy +1 more·Mar 14, 2022
For the efficient implementation of quantum algorithms, practical ways to generate many-body entanglement are a basic requirement. Specifically, coupling multiple qubit pairs at once can be advantageous and can lead to multi-qubit operations useful i...
Psitrum: An open source simulator for universal quantum computers
Mohammed Alghadeer, Eid Aldawsari, R. Selvarajan +3 more·Mar 14, 2022
Quantum computing is a radical new paradigm for a technology that is capable to revolutionise information processing. Simulators of universal quantum computer are important for understanding the basic principles and operations of the current noisy in...
Quantum computation of reactions on surfaces using local embedding
Tanvi P. Gujarati, M. Motta, Triet Friedhoff +9 more·Mar 14, 2022
Modeling electronic systems is an important application for quantum computers. In the context of materials science, an important open problem is the computational description of chemical reactions on surfaces. In this work, we outline a workflow to m...
Memristor-Based Cryogenic Programmable DC Sources for Scalable In Situ Quantum-Dot Control
Pierre-Antoine Mouny, Y. Beilliard, S'ebastien Graveline +8 more·Mar 14, 2022
Current quantum systems based on spin qubits are controlled by classical electronics located outside the cryostat. This approach creates a major wiring bottleneck, which is one of the main roadblocks toward scalable quantum computers. Thus, we propos...