Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,642 papers in 12 months (-16% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Mitigating algorithmic errors in quantum optimization through energy extrapolation
Chenfeng Cao, Yunlong Yu, Zipeng Wu +3 more·Sep 16, 2021
Quantum optimization algorithms offer a promising route to finding the ground states of target Hamiltonians on near-term quantum devices. Nonetheless, it remains necessary to limit the evolution time and circuit depth as much as possible, since other...
A universal qudit quantum processor with trapped ions
M. Ringbauer, M. Meth, L. Postler +4 more·Sep 14, 2021
Most quantum computers use binary encoding to store information in qubits—the quantum analogue of classical bits. Yet, the underlying physical hardware consists of information carriers that are not necessarily binary, but typically exhibit a rich mul...
Distilling GHZ States using Stabilizer Codes
Narayanan Rengaswamy, Ankur Raina, Nithin Raveendran +1 more·Sep 13, 2021
Entanglement distillation is a well-studied problem in quantum information, where one typically starts with n noisy Bell pairs and distills k Bell pairs of higher fidelity. While distilling Bell pairs is the canonical setting, it is important to study...
Relating Measurement Patterns to Circuits via Pauli Flow
Will Simmons·Sep 13, 2021
The one-way model of Measurement-Based Quantum Computing and the gate-based circuit model give two different presentations of how quantum computation can be performed. There are known methods for converting any gate-based quantum circuit into a one-w...
Towards a variational Jordan–Lee–Preskill quantum algorithm
Junyu Liu, Zimu Li, Han Zheng +2 more·Sep 12, 2021
Rapid developments of quantum information technology show promising opportunities for simulating quantum field theory in near-term quantum devices. In this work, we formulate the theory of (time-dependent) variational quantum simulation of the 1+1 di...
Efficient noise mitigation technique for quantum computing
Ali Shaib, Mohamad H. Naim, M. Fouda +2 more·Sep 10, 2021
Quantum computers have enabled solving problems beyond the current machines’ capabilities. However, this requires handling noise arising from unwanted interactions in these systems. Several protocols have been proposed to address efficient and accura...
Timing Constraints Imposed by Classical Digital Control Systems on Photonic Implementations of Measurement-Based Quantum Computing
John R Scott, K. Balram·Sep 10, 2021
Most of the architectural research on photonic implementations of measurement-based quantum computing (MBQC) has focused on the quantum resources involved in the problem with the implicit assumption that these will provide the main constraints on sys...
Entangling-gate error from coherently displaced motional modes of trapped ions
B. Ruzic, T. Barrick, J. Hunker +7 more·Sep 9, 2021
Entangling gates in trapped-ion quantum computing have primarily targeted stationary ions with initial motional distributions that are thermal and close to the ground state. However, future systems will likely incur significant non-thermal excitation...
Analytical Nonadiabatic Couplings and Gradients within the State-Averaged Orbital-Optimized Variational Quantum Eigensolver.
Saad Yalouz, Emiel Koridon, Bruno Senjean +3 more·Sep 9, 2021
We introduce several technical and analytical extensions to our recent state-averaged orbital-optimized variational quantum eigensolver (SA-OO-VQE) algorithm (see Yalouz et al. Quantum Sci. Technol. 2021, 6, 024004). Motivated by the limitations of c...
Improving quantum linear system solvers via a gradient descent perspective
S. Gribling, Iordanis Kerenidis, D'aniel Szil'agyi·Sep 9, 2021
Solving systems of linear equations is one of the most important primitives in quantum computing that has the potential to provide a practical quantum advantage in many different areas, including in optimization, simulation, and machine learning. In ...
Variational quantum amplitude estimation
K. Plekhanov, Matthias Rosenkranz, Mattia Fiorentini +1 more·Sep 8, 2021
We propose to perform amplitude estimation with the help of constant-depth quantum circuits that variationally approximate states during amplitude amplification. In the context of Monte Carlo (MC) integration, we numerically show that shallow circuit...
Quantum computational advantage via 60-qubit 24-cycle random circuit sampling.
Qingling Zhu, S. Cao, Fusheng Chen +50 more·Sep 8, 2021
To ensure a long-term quantum computational advantage, the quantum hardware should be upgraded to withstand the competition of continuously improved classical algorithms and hardwares. Here, we demonstrate a superconducting quantum computing systems ...
Paulihedral: a generalized block-wise compiler optimization framework for Quantum simulation kernels
Gushu Li, Anbang Wu, Yunong Shi +3 more·Sep 7, 2021
The quantum simulation kernel is an important subroutine appearing as a very long gate sequence in many quantum programs. In this paper, we propose Paulihedral, a block-wise compiler framework that can deeply optimize this subroutine by exploiting hi...
Emerging quantum computing algorithms for quantum chemistry
M. Motta, J. Rice·Sep 7, 2021
Digital quantum computers provide a computational framework for solving the Schrödinger equation for a variety of many‐particle systems. Quantum computing algorithms for the quantum simulation of these systems have recently witnessed remarkable growt...
Hybridized Methods for Quantum Simulation in the Interaction Picture
A. Rajput, A. Roggero, N. Wiebe·Sep 7, 2021
Conventional methods of quantum simulation involve trade-offs that limit their applicability to specific contexts where their use is optimal. In particular, the interaction picture simulation has been found to provide substantial asymptotic advantage...
High-fidelity magic-state preparation with a biased-noise architecture
Shraddha Singh, A. Darmawan, Benjamin J. Brown +1 more·Sep 6, 2021
Magic state distillation is a resource intensive subroutine that consumes noisy input states to produce high-fidelity resource states that are used to perform logical operations in practical quantum-computing architectures. The resource cost of magic ...
Hierarchical qubit maps and hierarchically implemented quantum error correction
N. Klco, M. Savage·Sep 5, 2021
We consider hierarchically implemented quantum error correction (HI-QEC), in which the fidelities of logical qubits are differentially optimized to enhance the capabilities of quantum devices in scientific applications. By employing qubit representat...
Towards a Larger Molecular Simulation on the Quantum Computer: Up to 28 Qubits Systems Accelerated by Point Group Symmetry
Changsu Cao, Jiaqi Hu, Wengang Zhang +7 more·Sep 5, 2021
The exact evaluation of the molecular ground state in quantum chemistry requires an exponentially increasing computational cost. Quantum computation is a promising way to overcome the exponential problem using polynomial-time quantum algorithms. A qu...
Achieving near native runtime performance and cross-platform performance portability for random number generation through SYCL interoperability
V. Pascuzzi, M. Goli·Sep 3, 2021
High-performance computing (HPC) is a major driver accelerating scientific research and discovery, from quantum simulations to medical therapeutics. While the increasing availability of HPC resources is in many cases pivotal to successful science, ev...
High-quality Thermal Gibbs Sampling with Quantum Annealing Hardware
J. Nelson, Marc Vuffray, A. Lokhov +2 more·Sep 3, 2021
Quantum Annealing (QA) was originally intended for accelerating the solution of combinatorial optimization tasks that have natural encodings as Ising models. However, recent experiments on QA hardware platforms have demonstrated that, in the operatin...