Quantum

Quantum has published 1021 Papers in 7 Volumes, as well as 72 Views in Quantum Views.

1000 Quantum papers!

Seven years ago, Quantum Journal was still just an idea in the minds of a handful of enthusiasts, who believed that it was time to offer a new way of …

Paper

Universal equilibration dynamics of the Sachdev-Ye-Kitaev model

Soumik Bandyopadhyay, Philipp Uhrich, Alessio Paviglianiti, and Philipp Hauke,

Quantum 7, 1022 (2023).

Equilibrium quantum many-body systems in the vicinity of phase transitions generically manifest universality. In contrast, limited knowledge has been gained on possible universal characteris…

Paper

Continuous majorization in quantum phase space

Zacharie Van Herstraeten, Michael G. Jabbour, and Nicolas J. Cerf,

Quantum 7, 1021 (2023).

We explore the role of majorization theory in quantum phase space. To this purpose, we restrict ourselves to quantum states with positive Wigner functions and show that the continuous versio…

Paper

Circuits of space and time quantum channels

Pavel Kos and Georgios Styliaris,

Quantum 7, 1020 (2023).

Exact solutions in interacting many-body systems are scarce but extremely valuable since they provide insights into the dynamics. Dual-unitary models are examples in one spatial dimension wh…

Paper

Quantum key distribution rates from semidefinite programming

Mateus Araújo, Marcus Huber, Miguel Navascués, Matej Pivoluska, and Armin Tavakoli,

Quantum 7, 1019 (2023).

Computing the key rate in quantum key distribution (QKD) protocols is a long standing challenge. Analytical methods are limited to a handful of protocols with highly symmetric measurement ba…

Paper

Exact and efficient Lanczos method on a quantum computer

William Kirby, Mario Motta, and Antonio Mezzacapo,

Quantum 7, 1018 (2023).

We present an algorithm that uses block encoding on a quantum computer to exactly construct a Krylov space, which can be used as the basis for the Lanczos method to estimate extremal eigenva…

Paper

Page curves and typical entanglement in linear optics

Joseph T. Iosue, Adam Ehrenberg, Dominik Hangleiter, Abhinav Deshpande, and Alexey V. Gorshkov,

Quantum 7, 1017 (2023).

Bosonic Gaussian states are a special class of quantum states in an infinite dimensional Hilbert space that are relevant to universal continuous-variable quantum computation as well as to ne…

Paper

Driven-dissipative topological phases in parametric resonator arrays

Álvaro Gómez-León, Tomás Ramos, Alejandro González-Tudela, and Diego Porras,

Quantum 7, 1016 (2023).

We study the phenomena of topological amplification in arrays of parametric oscillators. We find two phases of topological amplification, both with directional transport and exponential gain…

Paper

Relative Facts of Relational Quantum Mechanics are Incompatible with Quantum Mechanics

Jay Lawrence, Marcin Markiewicz, and Marek Żukowski,

Quantum 7, 1015 (2023).

Relational Quantum Mechanics (RQM) claims to be an interpretation of quantum theory [20]. However, there are significant departures from quantum theory: (i) in RQM measurement outcomes arise…

Paper

Quantum Lock: A Provable Quantum Communication Advantage

Kaushik Chakraborty, Mina Doosti, Yao Ma, Chirag Wadhwa, Myrto Arapinis, and Elham Kashefi,

Quantum 7, 1014 (2023).

Physical unclonable functions(PUFs) provide a unique fingerprint to a physical entity by exploiting the inherent physical randomness. Gao et al. discussed the vulnerability of most current-d…

Paper

Axioms for retrodiction: achieving time-reversal symmetry with a prior

Arthur J. Parzygnat and Francesco Buscemi,

Quantum 7, 1013 (2023).

We propose a category-theoretic definition of retrodiction and use it to exhibit a time-reversal symmetry for all quantum channels. We do this by introducing retrodiction families and functo…

Paper

Smooth Metric Adjusted Skew Information Rates

Koji Yamaguchi and Hiroyasu Tajima,

Quantum 7, 1012 (2023).

Metric adjusted skew information, induced from quantum Fisher information, is a well-known family of resource measures in the resource theory of asymmetry. However, its asymptotic rates are…

Paper

A subpolynomial-time algorithm for the free energy of one-dimensional quantum systems in the thermodynamic limit

Hamza Fawzi, Omar Fawzi, and Samuel O. Scalet,

Quantum 7, 1011 (2023).

We introduce a classical algorithm to approximate the free energy of local, translation-invariant, one-dimensional quantum systems in the thermodynamic limit of infinite chain size. While th…

Paper

On relating one-way classical and quantum communication complexities

Naresh Goud Boddu, Rahul Jain, and Han-Hsuan Lin,

Quantum 7, 1010 (2023).

Communication complexity is the amount of communication needed to compute a function when the function inputs are distributed over multiple parties. In its simplest form, one-way communicati…

Paper

Simplicial quantum contextuality

Cihan Okay, Aziz Kharoof, and Selman Ipek,

Quantum 7, 1009 (2023).

We introduce a new framework for contextuality based on simplicial sets, combinatorial models of topological spaces that play a prominent role in modern homotopy theory. Our approach extends…

Paper

Continuous-Variable Entanglement through Central Forces: Application to Gravity between Quantum Masses

Ankit Kumar, Tanjung Krisnanda, Paramasivan Arumugam, and Tomasz Paterek,

Quantum 7, 1008 (2023).

We describe a complete method for a precise study of gravitational interaction between two nearby quantum masses. Since the displacements of these masses are much smaller than the initial se…

Paper

Unitary Evolutions Sourced By Interacting Quantum Memories: Closed Quantum Systems Directing Themselves Using Their State Histories

Alireza Tavanfar, Aliasghar Parvizi, and Marco Pezzutto,

Quantum 7, 1007 (2023).

We propose, formulate and examine novel quantum systems and behavioral phases in which momentary choices of the system's memories interact in order to source the internal interactions and un…