Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Toward a quantum simulation of nonlinear sigma models with a topological term
Jack Y. Araz, S. Schenk, M. Spannowsky·Oct 7, 2022
We determine the mass gap of a two-dimensional $O(3)$ nonlinear sigma model augmented with a topological $\theta$-term using tensor network and digital quantum algorithms. As proof of principle, we consider the example $\theta = \pi$ and study its cr...
Time evolution of uniform sequential circuits
Nikita Astrakhantsev, Sheng-Hsuan Lin, F. Pollmann +1 more·Oct 7, 2022
Simulating time evolution of generic quantum many-body systems using classical numerical approaches has an exponentially growing cost either with evolution time or with the system size. In this work, we present a polynomially scaling hybrid quantum-c...
Ab-initio tree-tensor-network digital twin for quantum computer benchmarking in 2D
Daniel Jaschke, A. Pagano, S. Weber +1 more·Oct 7, 2022
Large-scale numerical simulations of the Hamiltonian dynamics of a noisy intermediate scale quantum computer—a digital twin—could play a major role in developing efficient and scalable strategies for tuning quantum algorithms for specific hardware. V...
Hybrid Quantum Classical Simulations
D. Willsch, M. Jattana, M. Willsch +4 more·Oct 6, 2022
We report on two major hybrid applications of quantum computing, namely, the quantum approximate optimisation algorithm (QAOA) and the variational quantum eigensolver (VQE). Both are hybrid quantum classical algorithms as they require incremental com...
Solution of SAT problems with the adaptive-bias quantum approximate optimization algorithm
Yunlong Yu, Chenfeng Cao, Xiang-Bin Wang +2 more·Oct 6, 2022
The quantum approximate optimization algorithm (QAOA) is a promising method for solving certain classical combinatorial optimization problems on near-term quantum devices. When employing the QAOA to 3-SAT and Max-3-SAT problems, the quantum cost exhi...
Bayesian autotuning of Hubbard model quantum simulators
L. Szulakowska, J. Dai·Oct 6, 2022
Spins in gated semiconductor quantum dots (QDs) are a promising platform for Hubbard model simulation inaccessible to computation. Precise control of the tunnel couplings by tuning voltages on metallic gates is vital for a successful QD-based simulat...
Quantum simulation of preferred tautomeric state prediction
Yu Shee, Tzu-Lan Yeh, Jeng-Yueh Hsiao +3 more·Oct 6, 2022
Prediction of tautomers plays an essential role in computer-aided drug discovery. However, it remains a challenging task nowadays to accurately predict the canonical tautomeric form of a given drug-like molecule. Lack of extensive tautomer databases,...
Universal Quantum Speedup for Branch-and-Bound, Branch-and-Cut, and Tree-Search Algorithms
Shouvanik Chakrabarti, Pierre Minssen, Romina Yalovetzky +1 more·Oct 6, 2022
Mixed Integer Programs (MIPs) model many optimization problems of interest in Computer Science, Operations Research, and Financial Engineering. Solving MIPs is NP-Hard in general, but several solvers have found success in obtaining near-optimal solut...
Learning many-body Hamiltonians with Heisenberg-limited scaling
Hsin-Yuan Huang, Yu Tong, Di Fang +1 more·Oct 6, 2022
Learning a many-body Hamiltonian from its dynamics is a fundamental problem in physics. In this Letter, we propose the first algorithm to achieve the Heisenberg limit for learning an interacting N-qubit local Hamiltonian. After a total evolution time...
Studying chirality imbalance with quantum algorithms
Alexander M. Czajka, Zhong-Bo Kang, Y. Tee +1 more·Oct 6, 2022
To describe the chiral magnetic effect, the chiral chemical potential µ 5 is introduced to imitate the impact of topological charge changing transitions in the quark-gluon plasma under the influence of an external magnetic field. We employ the (1+1) dim...
Quantum Communication Complexity of Linear Regression
A. Montanaro, Changpeng Shao·Oct 4, 2022
Quantum computers may achieve speedups over their classical counterparts for solving linear algebra problems. However, in some cases—such as for low-rank matrices—dequantized algorithms demonstrate that there cannot be an exponential quantum speedup....
Perturbation theory with quantum signal processing
K. Mitarai, Kiichiro Toyoizumi, W. Mizukami·Oct 3, 2022
Perturbation theory is an important technique for reducing computational cost and providing physical insights in simulating quantum systems with classical computers. Here, we provide a quantum algorithm to obtain perturbative energies on quantum comp...
RF simulation platform of qubit control using FDSOI technology for quantum computing
H. Jacquinot, R. Maurand, G. T. F. Bada +10 more·Oct 1, 2022
In this paper, we report on simulations of an Electron Spin Resonance (ESR) RF control line for semiconductor electron spin qubits. The simulation includes both the ESR line characteristics (geometry and configuration, stack and material properties) ...
Scaling Superconducting Quantum Computers with Chiplet Architectures
Kaitlin N. Smith, Gokul Subramanian Ravi, Jonathan M. Baker +1 more·Oct 1, 2022
Fixed-frequency transmon quantum computers (QCs) have advanced in coherence times, addressability, and gate fidelities. Unfortunately, these devices are restricted by the number of on-chip qubits, capping processing power and slowing progress toward ...
Quantum representation of finite groups
Ruge Lin·Sep 29, 2022
The concept of quantum representation of finite groups (QRFG) has been a fundamental aspect of quantum computing for quite some time, playing a role in every corner, from elementary quantum logic gates to the famous Shor's and Grover's algorithms. In...
Intrinsic noise of the single-electron box
L. Cochrane, A. Seshia, M. Gonzalez-Zalba·Sep 29, 2022
The radio-frequency (rf) single-electron box is becoming an attractive charge sensor for semiconductor-based quantum computing devices due to its high sensitivity and small footprint, which facilitate the design of highly connected qubit architecture...
Towards global time distribution via satellite-based sources of entangled photons
Stav Haldar, I. Agulló, Anthony J. Brady +3 more·Sep 29, 2022
We propose a satellite-based scheme to perform clock synchronization between ground stations spread across the globe using quantum resources. We refer to this as a quantum clock synchronization (QCS) network. Through detailed numerical simulations, w...
Quantum state tomography, entanglement detection and Bell violation prospects in weak decays of massive particles
Rachel Ashby-Pickering, Alan J. Barr, Agnieszka Wierzchucka·Sep 28, 2022
A rather general method for determining the spin density matrix of a multi-particle system from angular decay data is presented. The method is based on a Bloch parameterisation of the $d$-dimensional generalised Gell-Mann representation of $ρ$ and ex...
Quantum phase processing and its applications in estimating phase and entropies
Youle Wang, Lei Zhang, Zhan Yu +1 more·Sep 28, 2022
Quantum computing can provide speedups in solving many problems as the evolution of a quantum system is described by a unitary operator in an exponentially large Hilbert space. Such unitary operators change the phase of their eigenstates and make qua...
An Interface for Variational Quantum Eigensolver based Energy (VQE-E) and Force (VQE-F) Calculator to Atomic Simulation Environment (ASE)
R. NirmalM., Shampa Sarkar, M. Nambiar·Sep 28, 2022
The development of quantum algorithms to solve quantum chemistry problems has offered a promising new paradigm of performing computer simulations at the scale of atoms and molecules. Although majority of the research so far has focused on designing q...