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Entropy, Volume 26, Issue 11

November 2024 - 110 articles

Cover Story: Quantum information scrambling describes how initially localized information spreads across many degrees of freedom in quantum systems, a process crucial to understanding thermalization. While typically studied in sudden quenches, this work explores scrambling during adiabatic evolution in critical systems. The cover illustrates an adiabatic cycle where information, initially encoded in a symmetry-breaking state, becomes scrambled as the system transitions between quantum phases. Although the populations of the initial state remain intact, relative phases among eigenstates change, rendering the encoded information inaccessible and factually lost. This research connects information scrambling with quantum phase transitions, offering insights for experimental studies of quantum many-body systems. View this paper
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Articles (110)

  • Article
  • Open Access
1 Citations
1,553 Views
24 Pages

17 November 2024

Performance metrics are measures of success or performance that can be used to evaluate how well a model makes accurate predictions or classifications. However, there is no single measure since each performance metric emphasizes a different classific...

  • Article
  • Open Access
1 Citations
1,423 Views
15 Pages

17 November 2024

Quantum generative models have shown promise in fields such as quantum chemistry, materials science, and optimization. However, their practical utility is hindered by a significant challenge: the lack of interpretability. In this work, we introduce m...

  • Article
  • Open Access
1 Citations
1,344 Views
9 Pages

17 November 2024

Gravity and electromagnetic interactions are the only fundamental physical interactions (outside the nuclear domain). In this work, we shall concentrate on Hamiltonians containing gravitational interaction, which according to general relativity must...

  • Article
  • Open Access
2 Citations
1,753 Views
34 Pages

17 November 2024

Serious crime modelling typically needs to be undertaken securely behind a firewall where police knowledge and capabilities remain undisclosed. Data informing an ongoing incident are often sparse; a large proportion of relevant data only come to ligh...

  • Article
  • Open Access
2 Citations
2,637 Views
17 Pages

16 November 2024

The brain is a biological system comprising nerve cells and orchestrates its embodied agent’s perception, behavior, and learning in dynamic environments. The free-energy principle (FEP) advocated by Karl Friston explicates the local, recurrent,...

  • Review
  • Open Access
1 Citations
1,184 Views
29 Pages

15 November 2024

This paper discusses the foundation of security theory for the Quantum stream cipher based on the Holevo–Yuen theory, which allows the use of “optical amplifiers”. This type of cipher is a technology that provides information-theore...

  • Article
  • Open Access
1 Citations
1,048 Views
13 Pages

New Variable-Weight Optical Orthogonal Codes with Weights 3 to 5

  • Si-Yeon Pak,
  • Hyo-Won Kim,
  • DaeHan Ahn and
  • Jin-Ho Chung

15 November 2024

In optical networks, designing optical orthogonal codes (OOCs) with appropriate parameters is essential for enhancing the overall system performance. They are divided into two categories, constant-weight OOCs (CW-OOCs) and variable-weight OOCs (VW-OO...

  • Article
  • Open Access
1 Citations
1,776 Views
50 Pages

Non-Equilibrium Quantum Brain Dynamics: Water Coupled with Phonons and Photons

  • Akihiro Nishiyama,
  • Shigenori Tanaka and
  • Jack Adam Tuszynski

15 November 2024

We investigate Quantum Electrodynamics (QED) of water coupled with sound and light, namely Quantum Brain Dynamics (QBD) of water, phonons and photons. We provide phonon degrees of freedom as additional quanta in the framework of QBD in this paper. We...

  • Article
  • Open Access
1 Citations
1,980 Views
15 Pages

Dynamics of Aggregation in Systems of Self-Propelled Rods

  • Richard J. G. Löffler and
  • Jerzy Gorecki

15 November 2024

We highlight camphene–camphor–polypropylene plastic as a useful material for self-propelled objects that show aggregation while floating on a water surface. We consider self-propelled rods as an example of aggregation of objects character...

  • Article
  • Open Access
1,107 Views
23 Pages

Bowen’s Formula for a Dynamical Solenoid

  • Andrzej Biś,
  • Wojciech Kozłowski and
  • Agnieszka Marczuk

15 November 2024

More than 50 years ago, Rufus Bowen noticed a natural relation between the ergodic theory and the dimension theory of dynamical systems. He proved a formula, known today as the Bowen’s formula, that relates the Hausdorff dimension of a conforma...

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Entropy - ISSN 1099-4300