Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum Computation of Electronic Structure with Projector Augmented-Wave Method and Plane Wave Basis Set.
Aleksei V Ivanov, Andrew Patterson, Marius Bothe +6 more·Aug 6, 2024
Quantum simulation of materials is a promising application area of quantum computers. To practically realize this promise, we must reduce quantum resources while maintaining accuracy. In electronic structure calculations on classical computers, resou...
Approximating under the Influence of Quantum Noise and Compute Power
Simon Thelen, Hila Safi, Wolfgang Mauerer·Aug 5, 2024
The quantum approximate optimisation algorithm (QAOA) and its variants are at the core of many scenarios that aim at combining the power of quantum computers (QC) and classical high-performance computing (HPC) appliances for combinatorial optimisatio...
Realizing a mechanical dynamical Casimir effect with a low-frequency oscillator
Tian Jiang, Jun Jing·Aug 5, 2024
We propose to realize a mechanical dynamical Casimir effect (MDCE) in a hybrid optomechanical system consisting of a cavity mode, a low-frequency mechanical oscillator, and a two-level atomic system. Described by the effective Hamiltonian, the mechan...
Compact multi-threshold quantum information driven ansatz for strongly interactive lattice spin models
Fabio Tarocco, Davide Materia, Leonardo Ratini +1 more·Aug 5, 2024
Quantum algorithms based on the variational principle have found applications in diverse areas with a huge flexibility. But as the circuit size increases the variational landscapes become flattened, causing the so-called Barren plateau phenomena. Thi...
Polynomial-Time Classical Simulation of Hidden Shift Circuits via Confluent Rewriting of Symbolic Sums
Matthew Amy, Lucas Shigeru Stinchcombe·Aug 5, 2024
Implementations of Roetteler's shifted bent function algorithm have in recent years been used to test and benchmark both classical simulation algorithms and quantum hardware. These circuits have many favorable properties, including a tunable amount o...
Classical Communication Cost of a Bipartite Quantum Channel Assisted by Non-Signaling Correlations
Chengkai Zhu, Xuanqiang Zhao, Xin Wang·Aug 5, 2024
Understanding the classical communication cost of simulating a quantum channel is a fundamental problem in quantum information theory, which becomes even more intriguing when considering the role of non-locality in quantum information processing. Thi...
Using detector likelihood for benchmarking quantum error correction
Ian Hesner, Bence Het'enyi, James R. Wootton·Aug 4, 2024
The behavior of real quantum hardware differs strongly from the simple error models typically used when simulating quantum error correction. Error processes are far more complex than simple depolarizing noise applied to single gates, and error rates ...
Simulation of a Three‐Nucleons System Transition on Quantum Circuits
Luca Nigro, C. Barbieri, Enrico Prati·Aug 4, 2024
Quantum computers have proven to be effective in simulating many quantum systems. Simulating nuclear processes and state preparation poses significant challenges, even for traditional supercomputers. This study demonstrates the feasibility of a compl...
Quantum Algorithms for the Variational Optimization of Correlated Electronic States with Stochastic Reconfiguration and the Linear Method.
Mario Motta, Kevin J Sung, J. Shee·Aug 3, 2024
Solving the electronic Schrodinger equation for strongly correlated ground states is a long-standing challenge. We present quantum algorithms for the variational optimization of wave functions correlated by products of unitary operators, such as Loca...
Quantum noise modeling through Reinforcement Learning
Simone Bordoni, Andrea Papaluca, Piergiorgio Buttarini +3 more·Aug 2, 2024
In the current era of quantum computing, robust and efficient tools are essential to bridge the gap between simulations and quantum hardware execution. In this work, we introduce a machine learning approach to characterize the noise impacting a quant...
Optimally robust shortcuts to population inversion in cat-state qubits
Shao-Wei Xu, Zhong-Zheng Zhang, Yue-Ying Guo +2 more·Aug 1, 2024
Cat-state qubits formed by photonic coherent states are a promising candidate for realizing fault-tolerant quantum computing. Such logic qubits have a biased noise channel that the bit-flip error dominates over all the other errors. In this manuscrip...
Redefining Lexicographical Ordering: Optimizing Pauli String Decompositions for Quantum Compiling
Qunsheng Huang, David Winderl, A. M. D. Griend +1 more·Aug 1, 2024
In quantum computing, the efficient optimization of Pauli string decompositions is a crucial aspect for the compilation of quantum circuits for many applications, such as chemistry simulations and quantum machine learning. In this paper, we propose a...
Classical Benchmarks for Variational Quantum Eigensolver Simulations of the Hubbard Model
Antonios M. Alvertis, Abid Khan, T. Iadecola +2 more·Aug 1, 2024
Simulating the Hubbard model is of great interest to a wide range of applications within condensed matter physics, however its solution on classical computers remains challenging in dimensions larger than one. The relative simplicity of this model, e...
Beyond full statevector simulation with Qibo
Andrea Pasquale, Andrea Papaluca, Renato M. S. Farias +3 more·Aug 1, 2024
In this proceedings, we present two new quantum circuit simulation protocols recently added as optional backends to Qibo, an open-source framework for quantum simulation, hardware control and calibration. We describe the current status of the framewo...
To reset, or not to reset—that is the question
G. Geh'er, Marcin Jastrzębski, Earl T. Campbell +1 more·Aug 1, 2024
Whether to reset qubits, or not, during quantum error correction experiments is a question of both foundational and practical importance for quantum computing. Text-book quantum error correction demands that qubits are reset after measurement. Howeve...
Shadow hamiltonian simulation
R. Somma, R. King, Robin Kothari +2 more·Jul 31, 2024
Simulating quantum dynamics is one of the most important applications of quantum computers. Traditional approaches for quantum simulation involve preparing the full evolved state of the system and then measuring some physical quantity. Here, we prese...
Enhancing the Harrow-Hassidim-Lloyd (HHL) algorithm in systems with large condition numbers
Peniel Bertrand Tsemo, Akshaya Jayashankar, K. Sugisaki +3 more·Jul 31, 2024
Although the Harrow-Hassidim-Lloyd (HHL) algorithm offers an exponential speedup in system size for treating linear equations of the form $A\vec{x}=\vec{b}$ on quantum computers when compared to their traditional counterparts, it faces a challenge re...
Quantum circuit compilation with quantum computers
Davide Rattacaso, Daniel Jaschke, Marco Ballarin +2 more·Jul 31, 2024
Compilation optimizes quantum algorithms performances on real-world quantum computers. To date, it is performed via classical optimization strategies. We introduce a class of quantum algorithms to perform compilation via quantum computers, paving the...
Full classification of Pauli Lie algebras
G. Aguilar, Simon Cichy, J. Eisert +1 more·Jul 31, 2024
Lie groups, and therefore Lie algebras, are fundamental structures in quantum physics that determine the space of possible trajectories of evolving systems. However, classification and characterization methods for these structures are often impractic...
Highly-efficient quantum Fourier transformations for certain non-Abelian groups
E. M. Murairi, M. Alam, Henry Lamm +2 more·Jul 31, 2024
Quantum Fourier transformations are an essential component of many quantum algorithms, from prime factoring to quantum simulation. While the standard abelian QFT is well-studied, important variants corresponding to \emph{nonabelian} groups of interes...