Hydrodynamic phenomena can be observed with light thanks to the analogy between quantum gases and nonlinear optics. In this Letter, we report an experimental study of the superfluid-like properties of light in a (1+1)-dimensional nonlinear optical mesh lattice, where the arrival time of optical pulses plays the role of a synthetic spatial dimension. A spatially narrow defect at rest is used to excite sound waves in the fluid of light and measure the sound speed. The critical velocity for superfluidity is probed by looking at the threshold in the deposited energy by a moving defect, above which the apparent superfluid behavior breaks down. Our observations establish optical mesh lattices as a promising platform to study fluids of light in novel regimes of interdisciplinary interest, including non-Hermitian and/or topological physics.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.127.163901 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
From spasms to smiles: how facial recognition and tracking can quantify hemifacial spasm severity and predict treatment outcomes.
Acta Neurochir (Wien)
January 2025
Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany.
Purpose: Currently available grading and classification systems for hemifacial spasm either rely on subjective assessments or are excessively intricate. Here, we make use of facial recognition and facial tracking technologies towards accurately grouping patients according to severity and characteristics of the spasms.
Methods: A retrospective review of our prospectively maintained preoperative videos database for hemifacial spasm was done.
Functional Mechanical Behavior and Biocompatible Characteristics of Graphene-Coated Cardiovascular Stents.
Int J Mol Sci
December 2024
Pre-Clinical Research Centre, Wrocław Medical University, Marcinkowskiego 1, 50-368 Wrocław, Poland.
Percutaneous Coronary Intervention (PCI) is a treatment method that involves reopening narrowed arteries with a balloon catheter that delivers a cylindrical, mesh-shaped implant device to the site of the stenosis. Currently, by applying a coating to a bare metal stent (BMS) surface to improve biocompatibility, the main risks after PCI, such as restenosis and thrombosis, are reduced while maintaining the basic requirements for the mechanical behavior of the stent itself. In this work, for the first time, the development and optimization process of the spatial structure of the Co-Cr stent (L-605) with a graphene-based coating using cold-wall chemical vapor deposition (CW-CVD) to ensure uniform coverage of the implant was attempted.
View Article and Find Full Text PDFPediatric Fibrous Dysplasia of the Skull Base: Update on Management and Treatment.
Brain Sci
November 2024
Department of Neurological Surgery, Tulane University School of Medicine, New Orleans, LA 70112, USA.
Background: Fibrous dysplasia (FD) is often difficult for skull base surgeons to address. FD arises due to the abnormal proliferation of fibroblasts, ultimately resulting in immature osseous tissue replacing normal cancellous bone. When the skull base is involved, it can result in cranial nerve compression.
View Article and Find Full Text PDFFull analysis for the optical properties of the CsXInBr (X = Cu or Ag) double perovskites using both GW and Bethe-Salpeter approaches.
J Mol Model
January 2025
Department of Physics, Faculty of Sciences, Shahrekord University, P.O. Box 115, Shahrekord, Iran.
Article Synopsis
- Researchers are exploring renewable energy sources like solar cell technology to replace fossil fuels and reduce environmental impacts, focusing on lead-free halide perovskite compounds CsXInBr (where X is Cu or Ag).
- The study found that CsAgInBr and CsCuInBr compounds exhibit desirable properties for solar applications, with calculated optical gaps and high absorption coefficients, particularly noting CsCuInBr's effectiveness in absorbing sunlight due to its high infrared absorption.
- The analysis utilized the Abinit computational package and density functional theory (DFT) to evaluate the electronic, structural, and optical characteristics of these compounds, framing potential applications in solar cells and detectors.
Lights and Shadows of Cytokines in Age-Related Eye Diseases: A Narrative Literature Review.
J Biochem Mol Toxicol
January 2025
Department of Ophthalmology, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China.
The eye is considered to be an immune-privileged region. However, several parts of the eye have distinct mechanisms for delivering immune cells to the injury sites or even in response to aging. Although these immune responses are intended to be protective, the visual acuity can be compromised by the release of pro-inflammatory cytokines by immune cells, which induce chronic inflammation and fibrosis.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!