Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

3.7K
In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
3.7K
Castigliano's Theorem01:18

Castigliano's Theorem

762
Castigliano's theorem analyzes displacements and rotations in elastic structures. It relates the derivative of elastic strain energy to the applied forces or moments, allowing for the calculation of deformations. The theorem states that the partial derivative of the total strain energy of a system with respect to a specific load results in the displacement at the point where the load is applied. This principle applies to both forces and moments.
762
Torsion of Noncircular Members01:16

Torsion of Noncircular Members

362
Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...
362
Curve Equations01:17

Curve Equations

191
Curves are essential geometric elements characterized by tangent distance, chord length, middle ordinate, and total arc length. These measurements are crucial in understanding a curve's geometric and spatial properties and are defined by the relationship between its radius and its central angle.The tangent distance (T) refers to the straight-line measurement from the intersection point of two tangents to either the start or end of the curve. This distance is influenced by the curve's radius (R)...
191
Divergence and Stokes' Theorems01:06

Divergence and Stokes' Theorems

3.1K
The divergence and Stokes' theorems are a variation of Green's theorem in a higher dimension. They are also a generalization of the fundamental theorem of calculus. The divergence theorem and Stokes' theorem are in a way similar to each other; The divergence theorem relates to the dot product of a vector, while Stokes' theorem relates to the curl of a vector. Many applications in physics and engineering make use of the divergence and Stokes' theorems, enabling us to write...
3.1K
Space Trusses01:25

Space Trusses

1.1K
A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. The space truss is widely used in various construction projects due to its adaptability and capacity to withstand complex loads.
At the core of a space truss lies the fundamental unit known as the tetrahedron. This structure is composed of six members that form a three-dimensional shape...
1.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Post-Newtonian Feasibility of the Closed String Massless Sector.

Physical review letters·2022
Same author

Identifying Riemannian Singularities with Regular Non-Riemannian Geometry.

Physical review letters·2022
Same author

Standard Model as a Double Field Theory.

Physical review letters·2015
Same author

Spacetime emergence of the robertson-walker universe from a matrix model.

Physical review letters·2007

Related Experiment Video

Updated: Nov 27, 2025

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
06:07

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

13.3K

String Theory and Non-Riemannian Geometry.

Jeong-Hyuck Park1,2, Shigeki Sugimoto2

  • 1Department of Physics, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea.

Physical Review Letters
|December 4, 2020
PubMed
Summary

Researchers quantized closed strings on novel non-Riemannian geometries, finding stable string vacua. This work offers alternatives to traditional string compactification, potentially advancing string theory.

More Related Videos

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

11.8K
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

7.1K

Related Experiment Videos

Last Updated: Nov 27, 2025

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
06:07

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

13.3K
Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

11.8K
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

7.1K

Area of Science:

  • Theoretical Physics
  • String Theory
  • Quantum Gravity

Background:

  • The O(D,D) covariant generalized metric offers a new framework beyond Riemannian geometry.
  • Exploring fundamental variables is key to understanding novel spacetime structures.

Purpose of the Study:

  • To quantize closed strings on generalized metric backgrounds.
  • To identify stable, anomaly-free string vacua in critical dimensions.

Main Methods:

  • Quantization of closed strings on non-Riemannian backgrounds.
  • Analysis of string spectra and comparison with double field theory.

Main Results:

  • Identification of flat, anomaly-free, non-Riemannian string vacua in D=26 (or D=10).
  • The entire Becchi-Rouet-Stora-Tyutin closed string spectrum simplifies to a single, tachyon-free level.
  • The resulting spectrum aligns with linearized double field theory equations of motion.

Conclusions:

  • Non-Riemannian string vacua provide a viable alternative to traditional string compactification.
  • These findings may open new research avenues in theoretical physics and quantum gravity.