Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Loschmidt echo and scrambling of systematic errors in tomography -- a quantum signature of chaos
Abinash Sahu, Naga Dileep Varikuti, Vaibhav Madhok·Nov 21, 2022
How does quantum chaos lead to rapid scrambling of information as well as systematic errors across a system when one introduces perturbations in the dynamics? What are its consequences for the reliability of quantum simulations and quantum informatio...
Programmable Heisenberg interactions between Floquet qubits
Long B. Nguyen, Yosep Kim, A. Hashim +9 more·Nov 18, 2022
The trade-off between robustness and tunability is a central challenge in the pursuit of quantum simulation and fault-tolerant quantum computation. In particular, quantum architectures are often designed to achieve high coherence at the expense of tu...
Fock-Space Schrieffer–Wolff Transformation: Classically-Assisted Rank-Reduced Quantum Phase Estimation Algorithm
K. Kowalski, Nicholas P. Bauman·Nov 18, 2022
We present an extension of many-body downfolding methods to reduce the resources required in the quantum phase estimation (QPE) algorithm. In this paper, we focus on the Schrieffer–Wolff (SW) transformation of the electronic Hamiltonians for molecula...
Iterative qubit coupled cluster using only clifford circuits
James Brown, Marc P. Coons, Erika Lloyd +4 more·Nov 18, 2022
The performance of quantum algorithms for ground-state energy estimation is directly impacted by the quality of the initial state, where quality is traditionally defined in terms of the overlap of the input state with the target state. An ideal state...
Dipolar spin-exchange and entanglement between molecules in an optical tweezer array
Yicheng Bao, Scarlett S. Yu, L. Anderegg +4 more·Nov 17, 2022
Ultracold polar molecules are promising candidate qubits for quantum computing and quantum simulations. Their long-lived molecular rotational states form robust qubits, and the long-range dipolar interaction between molecules provides quantum entangl...
Digital Simulation of Projective Non-Abelian Anyons with 68 Superconducting Qubits
Shibo Xu, Zheng Sun, Ke Wang +31 more·Nov 17, 2022
Non-Abelian anyons are exotic quasiparticle excitations hosted by certain topological phases of matter. They break the fermion-boson dichotomy and obey non-Abelian braiding statistics: their interchanges yield unitary operations, rather than merely a...
Near-term quantum computing techniques: Variational quantum algorithms, error mitigation, circuit compilation, benchmarking and classical simulation
Heliang Huang, Xiao-Yue Xu, Chu Guo +5 more·Nov 16, 2022
Quantum computing is a game-changing technology for global academia, research centers and industries including computational science, mathematics, finance, pharmaceutical, materials science, chemistry and cryptography. Although it has seen a major bo...
On the complexity of implementing Trotter steps
G. Low, Yuan Su, Yu Tong +1 more·Nov 16, 2022
Quantum dynamics can be simulated on a quantum computer by exponentiating elementary terms from the Hamiltonian in a sequential manner. However, such an implementation of Trotter steps has gate complexity depending on the total Hamiltonian term numbe...
Quantum sensing with tunable superconducting qubits: optimization and speed-up
S. Danilin, Nicholas J. Nugent, M. Weides·Nov 15, 2022
Sensing and metrology are crucial in both fundamental science and practical applications. They meet the constant demand for precise data, enabling more dependable assessments of theoretical models’ validity. Sensors, now a common feature in many fiel...
Differentiable matrix product states for simulating variational quantum computational chemistry
Chu Guo, Yi Fan, Zhiqian Xu +1 more·Nov 15, 2022
Quantum Computing is believed to be the ultimate solution for quantum chemistry problems. Before the advent of large-scale, fully fault-tolerant quantum computers, the variational quantum eigensolver (VQE) is a promising heuristic quantum algorithm t...
Generalized Parton Distribution Functions via Quantum Simulation of Quantum Field Theory in Light-front Coordinates
Carter M. Gustin, G. Goldstein·Nov 15, 2022
Quantum simulation of quantum field theories offers a new way to investigate properties of the fundamental constituents of matter. We develop quantum simulation algorithms based on the light-front formulation of relativistic field theories. The proce...
QuDiet: A classical simulation platform for qubit-qudit hybrid quantum systems
Turbasu Chatterjee, Arnav Das, Subhayu Kumar Bala +3 more·Nov 15, 2022
In the recent years, numerous research advancements have extended the limit of classical simulation of quantum algorithms. Although, most of the state-of-the-art classical simulators are only limited to binary quantum systems, which restrict the clas...
Preparation for Quantum Simulation of the 1+1D O(3) Non-linear {\sigma}-Model using Cold Atoms
Anthony N. Ciavarella, S. Caspar, Hersh Singh +1 more·Nov 14, 2022
The 1+1D O(3) non-linear {\sigma}-model is a model system for future quantum lattice simulations of other asymptotically-free theories, such as non-Abelian gauge theories. We find that utilizing dimensional reduction can make efficient use of two-dim...
Classical Shadow Tomography for Continuous Variables Quantum Systems
Simon Becker, N. Datta, Ludovico Lami +1 more·Nov 14, 2022
In this article we develop a continuous variable (CV) shadow tomography scheme with wide ranging applications in quantum optics. Our work is motivated by the increasing experimental and technological relevance of CV systems in quantum information, qu...
A Reorder Trick for Decision Diagram Based Quantum Circuit Simulation
Jingcheng Shen, Linbo Long, M. Okita +1 more·Nov 14, 2022
Quantum computing is a hotspot technology for its potential to accelerate specific applications by exploiting quantum parallelism. However, current physical quantum computers are limited to a relatively small scale, simulators based on conventional m...
CFLOBDDs: Context-Free-Language Ordered Binary Decision Diagrams
Meghana Sistla, Swarat Chaudhuri, T. Reps·Nov 13, 2022
This article presents a new compressed representation of Boolean functions, called CFLOBDDs (for Context-Free-Language Ordered Binary Decision Diagrams). They are essentially a plug-compatible alternative to BDDs (Binary Decision Diagrams), and hence...
Molecular electric dipole moments: from light to heavy molecules using a relativistic VQE algorithm
K. R. Swain, V. S. Prasannaa, K. Sugisaki +1 more·Nov 13, 2022
The quantum-classical hybrid Variational Quantum Eigensolver (VQE) algorithm is recognized to be the most suitable approach to obtain ground state energies of quantum many-body systems in the noisy intermediate scale quantum era. In this work, we ext...
Four-dimensional domain decomposition for the factorization of the fermion determinant
Matteo Saccardi, L. Giusti·Nov 13, 2022
The non-local dependence of the fermion determinant on the gauge field limits our ability of simulating Quantum Chromodynamics on the lattice. Here we present a factorization of the gauge field dependence of the fermion determinant based on an overla...
Simulating Hamiltonian dynamics in a programmable photonic quantum processor using linear combinations of unitary operations
Yue Yu, Y. Chi, C. Zhai +3 more·Nov 12, 2022
Simulating the dynamic evolutions of physical and molecular systems in a quantum computer is of fundamental interest in many applications 1,2 . Its implementation requires efficient quantum simulation algorithms 3–12 . The Lie-Trotter-Suzuki approxima...
Adaptive basis sets for practical quantum computing
Hyukgun Kwon, Gregory M. Curtin, Zachary Morrow +2 more·Nov 11, 2022
Electronic structure calculations on small systems such as H$_2$, H$_2$O, LiH, and BeH$_2$ with chemical accuracy are still a challenge for the current generation of the noisy intermediate-scale quantum (NISQ) devices. One of the reasons is that due ...