Quantum

Paper

Effective versus Floquet theory for the Kerr parametric oscillator

Ignacio García-Mata, Rodrigo G. Cortiñas, Xu Xiao, Jorge Chávez-Carlos, Victor S. Batista, Lea F. Santos, and Diego A. Wisniacki,

Quantum 8, 1298 (2024).

Parametric gates and processes engineered from the perspective of the static effective Hamiltonian of a driven system are central to quantum technology. However, the perturbative expansions…

Paper

Efficient quantum amplitude encoding of polynomial functions

Javier Gonzalez-Conde, Thomas W. Watts, Pablo Rodriguez-Grasa, and Mikel Sanz,

Quantum 8, 1297 (2024).

Loading functions into quantum computers represents an essential step in several quantum algorithms, such as quantum partial differential equation solvers. Therefore, the inefficiency of thi…

Paper

Overhead-constrained circuit knitting for variational quantum dynamics

Gian Gentinetta, Friederike Metz, and Giuseppe Carleo,

Quantum 8, 1296 (2024).

Simulating the dynamics of large quantum systems is a formidable yet vital pursuit for obtaining a deeper understanding of quantum mechanical phenomena. While quantum computers hold great pr…

Paper

The Gauge Picture of Quantum Dynamics

Kevin Slagle,

Quantum 8, 1295 (2024).

Although local Hamiltonians exhibit local time dynamics, this locality is not explicit in the Schrödinger picture in the sense that the wavefunction amplitudes do not obey a local equation o…

Paper

Beyond-adiabatic Quantum Admittance of a Semiconductor Quantum Dot at High Frequencies: Rethinking Reflectometry as Polaron Dynamics

L. Peri, G. A. Oakes, L. Cochrane, C. J. B. Ford, and M. F. Gonzalez-Zalba,

Quantum 8, 1294 (2024).

Semiconductor quantum dots operated dynamically are the basis of many quantum technologies such as quantum sensors and computers. Hence, modelling their electrical properties at microwave fr…

Paper

Classical shadows based on locally-entangled measurements

Matteo Ippoliti,

Quantum 8, 1293 (2024).

We study classical shadows protocols based on randomized measurements in $n$-qubit entangled bases, generalizing the random Pauli measurement protocol ($n = 1$). We show that entangled measureme…

Paper

Constant-sized self-tests for maximally entangled states and single projective measurements

Jurij Volčič,

Quantum 8, 1292 (2024).

Self-testing is a powerful certification of quantum systems relying on measured, classical statistics. This paper considers self-testing in bipartite Bell scenarios with small number of inpu…

Paper

Dissipation as a resource for Quantum Reservoir Computing

Antonio Sannia, Rodrigo Martínez-Peña, Miguel C. Soriano, Gian Luca Giorgi, and Roberta Zambrini,

Quantum 8, 1291 (2024).

Dissipation induced by interactions with an external environment typically hinders the performance of quantum computation, but in some cases can be turned out as a useful resource. We show t…

Paper

Entanglement catalysis for quantum states and noisy channels

Chandan Datta, Tulja Varun Kondra, Marek Miller, and Alexander Streltsov,

Quantum 8, 1290 (2024).

Many applications of the emerging quantum technologies, such as quantum teleportation and quantum key distribution, require singlets, maximally entangled states of two quantum bits. It is th…

Paper

Sequential hypothesis testing for continuously-monitored quantum systems

Giulio Gasbarri, Matias Bilkis, Elisabet Roda-Salichs, and John Calsamiglia,

Quantum 8, 1289 (2024).

We consider a quantum system that is being continuously monitored, giving rise to a measurement signal. From such a stream of data, information needs to be inferred about the underlying syst…

Paper

Topological error correcting processes from fixed-point path integrals

Andreas Bauer,

Quantum 8, 1288 (2024).

We propose a unifying paradigm for analyzing and constructing topological quantum error correcting codes as dynamical circuits of geometrically local channels and measurements. To this end,…

Paper

Can Error Mitigation Improve Trainability of Noisy Variational Quantum Algorithms?

Samson Wang, Piotr Czarnik, Andrew Arrasmith, M. Cerezo, Lukasz Cincio, and Patrick J. Coles,

Quantum 8, 1287 (2024).

Variational Quantum Algorithms (VQAs) are often viewed as the best hope for near-term quantum advantage. However, recent studies have shown that noise can severely limit the trainability of…

Paper

Transformations in quantum networks via local operations assisted by finitely many rounds of classical communication

Cornelia Spee and Tristan Kraft,

Quantum 8, 1286 (2024).

Recent advances have led towards first prototypes of quantum networks in which entanglement is distributed by sources producing bipartite entangled states. This raises the question of which…

Paper

Stabilization of Hubbard-Thouless pumps through nonlocal fermionic repulsion

Javier Argüello-Luengo, Manfred J. Mark, Francesca Ferlaino, Maciej Lewenstein, Luca Barbiero, and Sergi Julià-Farré,

Quantum 8, 1285 (2024).

Thouless pumping represents a powerful concept to probe quantized topological invariants in quantum systems. We explore this mechanism in a generalized Rice-Mele Fermi-Hubbard model characte…

Paper

Basic quantum subroutines: finding multiple marked elements and summing numbers

Joran van Apeldoorn, Sander Gribling, and Harold Nieuwboer,

Quantum 8, 1284 (2024).

We show how to find all $k$ marked elements in a list of size $N$ using the optimal number $O(\sqrt{N k})$ of quantum queries and only a polylogarithmic overhead in the gate complexity, in the set…

Paper

A structure theorem for generalized-noncontextual ontological models

David Schmid, John H. Selby, Matthew F. Pusey, and Robert W. Spekkens,

Quantum 8, 1283 (2024).

It is useful to have a criterion for when the predictions of an operational theory should be considered classically explainable. Here we take the criterion to be that the theory admits of a…

Category: Paper