Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Bayesian mitigation of measurement errors in multiqubit experiments
F. Cosco, F. Plastina, N. L. Gullo·Aug 1, 2024
In Phys. Rev. A 108, L060402 (2023), we introduced a Bayesian measurement error mitigation algorithm, which leveraged complete information from the readout signal, and validated the protocol on a quantum device with five superconducting qubits. Here,...
Small correlation is sufficient for optimal noisy quantum metrology
Chao Yin, Victor V. Albert, Sisi Zhou·Jul 31, 2024
We propose a class of metrological resource states whose quantum Fisher information scales optimally in both system size and noise rate. In these states, qubits are partitioned into sensing groups with relatively large correlations within a group but...
Persistent Topological Negativity in a High-Temperature Mixed-State
Yonna Kim, A. Lavasani, Sagar Vijay·Jul 31, 2024
We study the entanglement structure of the Greenberger-Horne-Zeilinger (GHZ) state as it thermalizes under a strongly-symmetric quantum channel describing the Metropolis-Hastings dynamics for the $d$-dimensional classical Ising model at inverse tempe...
Quantum thermodynamics of open quantum systems: nature of thermal fluctuations
Neha Pathania, Devvrat Tiwari, Subhashish Banerjee·Jul 31, 2024
We investigate the thermodynamic behavior of open quantum systems through the Hamiltonian of mean force, focusing on two models: a two-qubit system interacting with a thermal bath and a Jaynes–Cummings model without the rotating wave approximation. B...
Capacities of quantum Markovian noise for large times
Omar Fawzi, Mizanur Rahaman, Mostafa Taheri·Jul 31, 2024
Given a quantum Markovian noise model, we study the maximum dimension of a classical or quantum system that can be stored for arbitrarily large time. We show that, unlike the fixed time setting, in the limit of infinite time, the classical and quantu...
Pulse family optimization for parametrized quantum gates using spectral clustering
Robert de Keijzer, J. Snijders, A. Carvalho +1 more·Jul 31, 2024
Parametrized gate circuits are used in plentiful applications in the current NISQ era of quantum computing. These parametrized gates are chiefly implemented using analytically found pulse protocols, often yielding suboptimal gate times, and consequen...
On the Use of Calibration Data in Error-Aware Compilation Techniques for NISQ Devices
Handy Kurniawan, Laura Rodríguez-Soriano, Daniele Cuomo +2 more·Jul 31, 2024
Reliably executing quantum algorithms on noisy intermediate-scale quantum (NISQ) devices is challenging, as they are severely constrained and prone to errors. Efficient quantum circuit compilation techniques are therefore crucial for overcoming their...
Efficient Circuit-Based Quantum State Tomography via Sparse Entry Optimization
Chi-Kwong Li, Kevin Yipu Wu, Zherui Zhang·Jul 29, 2024
Many quantum states arising in algorithms and physical systems occupy only a small, structured subset of the exponentially large Hilbert space, yet standard quantum state tomography fails to exploit this structure. We present an efficient circuit-bas...
Quantum long short-term memory for drug discovery
Liang Zhang, Yin Xu, Mohan Wu +2 more·Jul 29, 2024
Quantum computing combined with machine learning (ML) is a highly promising research area, with numerous studies demonstrating that quantum machine learning (QML) is expected to solve scientific problems more effectively than classical ML. In this wo...
Purification and correction of quantum channels by commutation-derived quantum filters
Sowmitra Das, Jinzhao Sun, Michael Hanks +2 more·Jul 29, 2024
Reducing errors is essential for reliable quantum computation. Quantum error mitigation (QEM) and quantum error correction (QEC) are two leading approaches for this task, each with challenges: QEM suffers from high sampling costs and cannot recover s...
Benchmarking and Fidelity Response Theory of High-Fidelity Rydberg Entangling Gates
R. Tsai, Xiangkai Sun, Adam L. Shaw +2 more·Jul 29, 2024
The fidelity of entangling operations is a key figure of merit in quantum information processing, especially in the context of quantum error correction. High-fidelity entangling gates in neutral atoms have seen remarkable advancement recently. A full...
Impact of Parallel Gating on Gate Fidelities in Linear, Square, and Star Arrays of Noisy Flip‐Flop Qubits
M. De Michielis, E. Ferraro·Jul 29, 2024
Successfully implementing a quantum algorithm involves maintaining a low logical error rate by ensuring the validity of the quantum fault‐tolerance theorem. The required number of physical qubits arranged in an array depends on the chosen Quantum Err...
Effects of quadratic optomechanical coupling on bipartite entanglements, mechanical ground-state cooling, and mechanical quadrature squeezing in an electro-optomechanical system
N. Ghorbani, A. Motazedifard, M. Naderi·Jul 27, 2024
We theoretically investigate the steady-state bipartite entanglements, mechanical ground-state cooling, and mechanical quadrature squeezing in a hybrid electro-optomechanical system where a moving membrane is linearly coupled to the microwave field m...
Using stochastic resonance of two-level systems to increase qubit coherence times
Yujun Choi, S. Coppersmith, R. Joynt·Jul 26, 2024
Two-level systems (TLS) are the major source of dephasing of spin qubits in numerous quantum computing platforms. In spite of much effort, it has been difficult to substantially mitigate the effects of this noise or, in many cases, to fully understan...
Few-Shot, Robust Calibration of Single Qubit Gates Using Bayesian Robust Phase Estimation
Travis Hurant, Ke-jia Sun, Zhubing Jia +2 more·Jul 25, 2024
Accurate calibration of control parameters in quan-tum gates is crucial for high-fidelity operations, yet it represents a significant time and resource challenge, necessitating periods of downtime for quantum computers. Robust Phase Estimation (RPE) ...
Quantum landscape tomography for efficient single-gate optimization on quantum computers
Matan Ben-Dov, I. Arad, Emanuele G. Dalla Torre·Jul 25, 2024
Circuit optimization is a fundamental task for practical applications of near-term quantum computers. In this work we address this challenge through the powerful lenses of tensor network theory. Our approach involves the full characterization of the ...
Discretized Quantum Exhaustive Search for Variational Quantum Algorithms
Ittay Alfassi, Dekel Meirom, Tal Mor·Jul 24, 2024
Quantum computers promise a great computational advantage over classical computers, yet currently available quantum devices have only a limited amount of qubits and a high level of noise, limiting the size of problems that can be solved accurately wi...
Speeding Up Quantum Measurement Using Space-Time Trade-Off.
Christopher Corlett, Ieva ˇCepait˙e, A. Daley +5 more·Jul 24, 2024
We present a scheme for speeding up quantum measurement. The scheme builds on previous protocols that entangle the system to be measured with ancillary systems. In the idealized situation of perfect entangling operations and no decoherence, it gives ...
Quanv4EO: Empowering Earth Observation by Means of Quanvolutional Neural Networks
A. Sebastianelli, Francesco Mauro, Giulia Ciabatti +4 more·Jul 24, 2024
A significant amount of remotely sensed data is generated daily by many Earth observation (EO) spaceborne and airborne sensors over different countries of our planet. Different applications use those data, such as natural hazard monitoring, global cl...
Noise-Aware Distributed Quantum Approximate Optimization Algorithm on Near-Term Quantum Hardware
Kuan-Cheng Chen, Xiaotian Xu, Felix Burt +1 more·Jul 24, 2024
This paper introduces a noise-aware distributed Quantum Approximate Optimization Algorithm (QAOA) tailored for execution on near-term quantum hardware. Leveraging a distributed framework, we address the limitations of current Noisy Intermediate-Scale...