Quantum

Paper

Quantum-optimal information encoding using noisy passive linear optics

Andrew Tanggara, Ranjith Nair, Syed Assad, Varun Narasimhachar, Spyros Tserkis, Jayne Thompson, Ping Koy Lam, and Mile Gu,

Quantum 8, 1218 (2024).

The amount of information that a noisy channel can transmit has been one of the primary subjects of interest in information theory. In this work we consider a practically-motivated family of…

Paper

A review and reformulation of macroscopic realism: resolving its deficiencies using the framework of generalized probabilistic theories

David Schmid,

Quantum 8, 1217 (2024).

The notion of macrorealism was introduced by Leggett and Garg in an attempt to capture our intuitive conception of the macroscopic world, which seems difficult to reconcile with our knowledg…

Paper

Earthquake Quantization

Benjamin Koch and Enrique Muñoz,

Quantum 8, 1216 (2024).

In this homage to Einstein's 144th birthday we propose a novel quantization prescription, where the paths of a path-integral are not random, but rather solutions of a geodesic equation in a…

Paper

Measurement-based quantum computation in finite one-dimensional systems: string order implies computational power

Robert Raussendorf, Wang Yang, and Arnab Adhikary,

Quantum 7, 1215 (2023).

We present a new framework for assessing the power of measurement-based quantum computation (MBQC) on short-range entangled symmetric resource states, in spatial dimension one. It requires f…

Paper

Determining the ability for universal quantum computing: Testing controllability via dimensional expressivity

Fernando Gago-Encinas, Tobias Hartung, Daniel M. Reich, Karl Jansen, and Christiane P. Koch,

Quantum 7, 1214 (2023).

Operator controllability refers to the ability to implement an arbitrary unitary in SU(N) and is a prerequisite for universal quantum computing. Controllability tests can be used in the desi…

Paper

General quantum algorithms for Hamiltonian simulation with applications to a non-Abelian lattice gauge theory

Zohreh Davoudi, Alexander F. Shaw, and Jesse R. Stryker,

Quantum 7, 1213 (2023).

With a focus on universal quantum computing for quantum simulation, and through the example of lattice gauge theories, we introduce rather general quantum algorithms that can efficiently sim…

Paper

Graph-theoretical optimization of fusion-based graph state generation

Seok-Hyung Lee and Hyunseok Jeong,

Quantum 7, 1212 (2023).

Graph states are versatile resources for various quantum information processing tasks, including measurement-based quantum computing and quantum repeaters. Although the type-II fusion gate e…

Paper

Quantum Alchemy and Universal Orthogonality Catastrophe in One-Dimensional Anyons

Naim E. Mackel, Jing Yang, and Adolfo del Campo,

Quantum 7, 1211 (2023).

Many-particle quantum systems with intermediate anyonic exchange statistics are supported in one spatial dimension. In this context, the anyon-anyon mapping is recast as a continuous transfo…

Paper

Generalization despite overfitting in quantum machine learning models

Evan Peters and Maria Schuld,

Quantum 7, 1210 (2023).

The widespread success of deep neural networks has revealed a surprise in classical machine learning: very complex models often generalize well while simultaneously overfitting training data…

Paper

Synergy between deep neural networks and the variational Monte Carlo method for small $^4He_N$ clusters

William Freitas and S. A. Vitiello,

Quantum 7, 1209 (2023).

We introduce a neural network-based approach for modeling wave functions that satisfy Bose-Einstein statistics. Applying this model to small $^4He_N$ clusters (with N ranging from 2 to 14 atom…

Paper

Shorter quantum circuits via single-qubit gate approximation

Vadym Kliuchnikov, Kristin Lauter, Romy Minko, Adam Paetznick, and Christophe Petit,

Quantum 7, 1208 (2023).

We give a novel procedure for approximating general single-qubit unitaries from a finite universal gate set by reducing the problem to a novel magnitude approximation problem, achieving an i…

Paper

High-dimensional Encoding in the Round-Robin Differential-Phase-Shift Protocol

Mikka Stasiuk, Felix Hufnagel, Xiaoqin Gao, Aaron Z. Goldberg, Frédéric Bouchard, Ebrahim Karimi, and Khabat Heshami,

Quantum 7, 1207 (2023).

In quantum key distribution (QKD), protocols are tailored to adopt desirable experimental attributes, including high key rates, operation in high noise levels, and practical security conside…

Paper

The Min-Entropy of Classical-Quantum Combs for Measurement-Based Applications

Isaac D. Smith, Marius Krumm, Lukas J. Fiderer, Hendrik Poulsen Nautrup, and Hans J. Briegel,

Quantum 7, 1206 (2023).

Learning a hidden property of a quantum system typically requires a series of interactions. In this work, we formalise such multi-round learning processes using a generalisation of classical…

Paper

Pipelined correlated minimum weight perfect matching of the surface code

Alexandru Paler and Austin G. Fowler,

Quantum 7, 1205 (2023).

We describe a pipeline approach to decoding the surface code using minimum weight perfect matching, including taking into account correlations between detection events. An independent no-com…

Paper

Digital Discovery of 100 diverse Quantum Experiments with PyTheus

Carlos Ruiz-Gonzalez, Sören Arlt, Jan Petermann, Sharareh Sayyad, Tareq Jaouni, Ebrahim Karimi, Nora Tischler, Xuemei Gu, and Mario Krenn,

Quantum 7, 1204 (2023).

Photons are the physical system of choice for performing experimental tests of the foundations of quantum mechanics. Furthermore, photonic quantum technology is a main player in the second q…

Paper

Engines for predictive work extraction from memoryful quantum stochastic processes

Ruo Cheng Huang, Paul M. Riechers, Mile Gu, and Varun Narasimhachar,

Quantum 7, 1203 (2023).

Quantum information-processing techniques enable work extraction from a system's inherently quantum features, in addition to the classical free energy it contains. Meanwhile, the science of…

Category: Paper