Papers
Live trends in quantum computing research, updated daily from arXiv.
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Fast scrambling in classically simulable quantum circuits
Mike Blake, Noah Linden, Anthony P. Thompson·Oct 25, 2024
We study operator scrambling in quantum circuits built from `super-Clifford'gates. For such circuits it was established in arXiv:2002.12824 that the time evolution of operator entanglement for a large class of many-body operators can be efficiently s...
Quantum Algorithm for Online Exp-concave Optimization
Jianhao He, Chengchang Liu, Xutong Liu +2 more·Oct 25, 2024
We explore whether quantum advantages can be found for the zeroth-order feedback online exp-concave optimization problem, which is also known as bandit exp-concave optimization with multi-point feedback. We present quantum online quasi-Newton methods...
Designing a Nearly Optimal Quantum Algorithm for Linear Differential Equations via Lindbladians.
Zhong-Xia Shang, N. Guo, Dong An +1 more·Oct 25, 2024
Solving linear ordinary differential equations (ODEs) is one of the most promising applications for quantum computers to demonstrate exponential advantages. The challenge of designing a quantum ODE algorithm is how to embed nonunitary dynamics into i...
Thermal cycling: Evidence for a generalized tunneling model and a tool to distinguish noise sources in quantum circuits
Yigal Reiss, Moshe Schechter·Oct 25, 2024
Structural two level systems (TLSs) ubiquitous in amorphous solids are dramatically sensitive to thermal cycling to about $20$K and then back to low temperature, a process upon which the excitation energy of most TLSs is significantly changed. Using ...
Monte Carlo particle transport on quantum computers
No'e Olivier, Michel Nowak·Oct 25, 2024
Monte Carlo particle transport codes are well established on classical hardware and are considered as the reference tool for nuclear applications. In a growing number of domains, the design of algorithms is progressively shifting towards the field of...
An Evidence of Addressing Coherence Errors in VQE Observables by Pulse-Level VQE Approach
Xiao-Dao Lin·Oct 25, 2024
Quantum computing is an advanced area of computing that leverages the principles of quantum mechanics. Quantum computing holds the potential to revolutionize various fields by handling problems that are currently intractable for classical computers. ...
Enhancing Quantum Key Distribution with Entanglement Distillation and Classical Advantage Distillation
Shin Sun, K. Goodenough, Daniel Bhatti +1 more·Oct 25, 2024
Realizing secure communication between distant parties is one of quantum technology's main goals. Although quantum key distribution promises information-theoretic security for sharing a secret key, the key rate heavily depends on the level of noise i...
Microsecond-lived quantum states in a carbon-based circuit driven by cavity photons
B. Neukelmance, B. Hue, Q. Schaeverbeke +16 more·Oct 25, 2024
Semiconductor quantum dots are an attractive platform for the realisation of quantum processors. To achieve long-range coupling between them, quantum dots have been integrated into microwave cavities. However, it has been shown that their coherence i...
Exactly solvable models for fermionic symmetry-enriched topological phases and fermionic 't Hooft anomaly
Jing-Ren Zhou, Zheng-Cheng Gu·Oct 24, 2024
The interplay between symmetry and topological properties plays a very important role in modern physics. In the past decade, the concept of symmetry-enriched topological (SET) phases was proposed and their classifications have been systematically stu...
Oracle Separations for the Quantum-Classical Polynomial Hierarchy
Avantika Agarwal, Shalev Ben-David·Oct 24, 2024
We study the quantum-classical polynomial hierarchy, QCPH, which is the class of languages solvable by a constant number of alternating classical quantifiers followed by a quantum verifier. Our main result is that QCPH is infinite relative to a rando...
A quantum machine learning classifier to search for new physics
Ji-Chong Yang, Shuai Zhang, Chong-Xing Yue·Oct 24, 2024
Due to the success of the Standard Model~(SM), it is reasonable to anticipate that the signal of new physics~(NP) beyond the SM is small. Consequently, future searches for NP and precision tests of the SM will require high luminosity collider experim...
Practical implementation of Toffoli-based qubit rotation
Christoffer Hindlycke, Jakov Krnic, Jan-Åke Larsson·Oct 24, 2024
The Toffoli gate is an important universal quantum gate, and will alongside the Clifford gates be available in future fault-tolerant quantum computing hardware. Many quantum algorithms rely on performing arbitrarily small single-qubit rotations for t...
Pure and Mixed State Entanglement Dynamics in Tavis-Cummings Model with Squeezed Coherent Thermal States
Koushik Mandal, M. V. Satyanarayana·Oct 24, 2024
We investigate the entanglement dynamics of two atoms interacting with a single-mode cavity field within the Tavis-Cummings model in the presence of noise. The atoms are initially prepared in either pure Bell states or mixed Werner states, allowing a...
Probabilistic Representation of Commutative Quantum Circuit Models
Richard Yu, Jorge M Ramirez Osorio, Elaine Wong·Oct 24, 2024
In commuting parametric quantum circuits, the Fourier series of the pairwise fidelity can be expressed as the characteristic function of random variables. Furthermore, expressiveness can be cast as the recurrence probability of a random walk on a lat...
Characterizing Conical Intersections of Nucleobases on Quantum Computers.
Yuchen Wang, Cameron Cianci, Irma Avdic +7 more·Oct 24, 2024
Hybrid quantum-classical computing algorithms offer significant potential for accelerating the calculation of the electronic structure of strongly correlated molecules. In this work, we present the first quantum simulation of conical intersections (C...
Error convergence of quantum linear system solvers
M. Ginzburg, U. Marzolino·Oct 24, 2024
We analyze the performance of the Harrow-Hassidim-Lloyd algorithm (HHL algorithm) for solving linear problems and of a variant of this algorithm (HHL variant) commonly encountered in literature. This variant relieves the algorithm of preparing an ent...
Tessellation Codes: Encoded Quantum Gates by Geometric Rotation.
Yixu Wang, Yijia Xu, Zi-Wen Liu·Oct 24, 2024
We utilize the symmetry groups of regular tessellations on two-dimensional surfaces of different constant curvatures, including spheres, Euclidean planes, and hyperbolic planes to encode a qubit or qudit into the physical degrees of freedom on these ...
Quantum Computing Approach to Fixed-Node Monte Carlo Using Classical Shadows
N. S. Blunt, Laura Caune, Javiera Quiroz-Fernandez·Oct 24, 2024
Quantum Monte Carlo (QMC) methods are powerful approaches for solving electronic structure problems. Although they often provide high-accuracy solutions, the precision of most QMC methods is ultimately limited by the trial wave function that must be ...
Stochastic optimal control of open quantum systems
Aarón Villanueva, H. Kappen·Oct 24, 2024
We address the generic problem of optimal quantum state preparation for open quantum systems. It is well known that open quantum systems can be simulated by quantum trajectories described by a stochastic Schr\"odinger equation. In this context, the s...
Measuring the boson mass of fuzzy dark matter with stellar proper motions
Gabriel D'Andrade Furlanetto, R. Della Monica, I. de Martino·Oct 24, 2024
Fuzzy dark matter (FDM) is among the most suitable candidates to replace WIMPs and to resolve the puzzling mystery of dark matter (DM). A galactic DM halo made of these ultralight bosonic particles leads to the formation of a solitonic core surrounde...