Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Noise-induced shallow circuits and absence of barren plateaus
Antonio Anna Mele, Armando Angrisani, Soumik Ghosh +4 more·Mar 20, 2024
Motivated by realistic hardware considerations of the pre-fault-tolerant era, we comprehensively study the impact of uncorrected noise on quantum circuits. We first show that in the task of estimating observable expectation values any noise truncates...
Decoherence-free algebras in quantum dynamics
Daniele Amato, Paolo Facchi, Arturo Konderak·Mar 19, 2024
In this Article we analyze the algebraic properties of the asymptotic dynamics of finite-dimensional open quantum systems in the Heisenberg picture. In particular, a natural product (Choi-Effros product) can be defined in the asymptotic regime. Motiv...
Efficient thermalization and universal quantum computing with quantum Gibbs samplers
Cambyse Rouzé, Daniel Stilck França, Álvaro M. Alhambra·Mar 19, 2024
The preparation of thermal states of matter is a crucial task in quantum simulation. In this work, we prove that a recently introduced, efficiently implementable dissipative evolution thermalizes to the Gibbs state in time scaling polynomially with s...
Denoising of imaginary time response functions with Hankel projections
Yang Yu, A. F. Kemper, Chao Yang +1 more·Mar 19, 2024
Imaginary-time response functions of finite-temperature quantum systems are often obtained with methods that exhibit stochastic or systematic errors. Reducing these errors comes at a large computational cost—in quantum Monte Carlo simulations, the re...
Accelerated quantum search using partial oracles and Grover's algorithm
F. Bolton·Mar 19, 2024
Grover's algorithm, orginally conceived as a means of searching an unordered database, can also be used to extract solutions from the result sets generated by quantum computations. The Grover algorithm exploits the concept of an oracle function, whic...
One-sided DI-QKD secure against coherent attacks over long distances
Michele Masini, Shubhayan Sarkar·Mar 18, 2024
Quantum Key Distribution (QKD) is a technique enabling provable secure communication but faces challenges in device characterization, posing potential security risks. Device-Independent (DI) QKD protocols overcome this issue by making minimal device ...
Fusion of deterministically generated photonic graph states
P. Thomas, L. Ruscio, O. Morin +1 more·Mar 18, 2024
Entanglement has evolved from an enigmatic concept of quantum physics to a key ingredient of quantum technology. It explains correlations between measurement outcomes that contradict classical physics and has been widely explored with small sets of i...
High-fidelity entangling gates for electron and nuclear spin qubits in diamond
Regina Finsterhoelzl, Wolf-Rüdiger Hannes, G. Burkard·Mar 18, 2024
Motivated by the recent experimental progress in exploring the use of a nitrogen-vacancy (NV) center in diamond as a quantum computing platform, we propose schemes for fast and high-fidelity entangling gates on this platform. Using both analytical an...
A tweezer array with 6,100 highly coherent atomic qubits
Hannah J. Manetsch, Gyohei Nomura, Elie Bataille +3 more·Mar 18, 2024
Optical tweezer arrays1,2 have transformed atomic and molecular physics, now forming the backbone for a range of leading experiments in quantum computing3, 4, 5, 6, 7–8, simulation1,9, 10, 11–12 and metrology13, 14–15. Typical experiments trap tens t...
Measurement-Based Quantum Approximate Optimization
T. Stollenwerk, Stuart Hadfield·Mar 18, 2024
Parameterized quantum circuits are attractive candidates for potential quantum advantage in the near term and beyond. At the same time, as quantum computing hardware not only continues to improve but also begins to incorporate new features such as mi...
Encoding of linear kinetic plasma problems in quantum circuits via data compression
I. Novikau, I. Dodin, E. A. Startsev·Mar 18, 2024
We propose an algorithm for encoding linear kinetic plasma problems in quantum circuits. The focus is on modelling electrostatic linear waves in a one-dimensional Maxwellian electron plasma. The waves are described by the linearized Vlasov–Ampère sys...
Measuring Quantum Information Leakage Under Detection Threat
F. Farokhi, Sejeong Kim·Mar 18, 2024
Gentle quantum leakage is proposed as a measure of information leakage to arbitrary eavesdroppers that aim to avoid detection. Gentle (also sometimes referred to as weak or non-demolition) measurements are used to encode the desire of the eavesdroppe...
A Tree-Approach Pauli Decomposition Algorithm with Application to Quantum Computing
Océane Koska, M. Baboulin, Arnaud Gazda·Mar 18, 2024
The Pauli matrices are 2-by-2 matrices that are very useful in quantum computing. They can be used as elementary gates in quantum circuits but also to decompose any matrix of $\mathbb{C}^{2^n \times 2^n}$ as a linear combination of tensor products of...
Shape and size measurements of nonequilibrium Bose-Einstein condensates using image processing
J.P.G. Venassi, V. Bagnato, G. Telles·Mar 18, 2024
Bose-Einstein condensates have been the subject of intense research in recent years due to their potential applications in quantum computing and many other areas. However, measuring the shape and size of out-of-equilibrium Bose-Einstein condensates i...
Graph algorithms with neutral atom quantum processors
Constantin Dalyac, L. Leclerc, Louis Vignoli +9 more·Mar 18, 2024
Neutral atom technology has steadily demonstrated significant theoretical and experimental advancements, positioning itself as a front-runner platform for running quantum algorithms. One unique advantage of this technology lies in the ability to reco...
Optimal Layout Synthesis for Deep Quantum Circuits on NISQ Processors with 100+ Qubits
Irfansha Shaik, J. V. D. Pol·Mar 18, 2024
Layout synthesis is mapping a quantum circuit to a quantum processor. SWAP gate insertions are needed for scheduling 2-qubit gates only on connected physical qubits. With the ever-increasing number of qubits in NISQ processors, scalable layout synthe...
Sequential and Programmable Squeezing Gates for Optical Non-Gaussian Input States
Takato Yoshida, D. Okuno, T. Kashiwazaki +6 more·Mar 18, 2024
Quantum computing has been pursued with various hardware platforms and an optical system is one of the most reasonable choices for large-scale computation. In the optical continuous-variable computation scheme, the incorporation of Gaussian gates and...
Multiplexed quantum state transfer in waveguides
G. F. Peñas, R. Puebla, J. Garc'ia-Ripoll·Mar 18, 2024
In this article, we consider a realistic waveguide implementation of a quantum network that serves as a testbed to show how to maximize the storage and manipulation of quantum information in QED setups. We analyze two approaches using wavepacket engi...
Hamiltonian-reconstruction distance as a success metric for the variational quantum eigensolver
Leo Joon Il Moon, Mandar M. Sohoni, M. Shimizu +4 more·Mar 18, 2024
The variational quantum eigensolver (VQE) is a hybrid quantum–classical algorithm for quantum simulation that can be run on near-term quantum hardware. A challenge in VQE—as well as any other heuristic algorithm for finding ground states of Hamiltoni...
Post-Quantum Cryptography: Securing Digital Communication in the Quantum Era
Dr. G S Mamatha, Namya Dimri, R. Sinha·Mar 18, 2024
The advent of quantum computing poses a profound threat to traditional cryptographic systems, exposing vulnerabilities that compromise the security of digital communication channels reliant on RSA, ECC, and similar classical encryption methods. Quant...