Related Experiment Video
Updated: Dec 14, 2025
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.1K
The QCD trace anomaly at strong coupling from M-theory
1Department of Physics, Indian Institute of Technology, Roorkee, Uttarakhand 247 667 India.
The European Physical Journal. C, Particles and Fields
|July 21, 2020
Summary
This study bridges a gap in understanding the QCD conformal anomaly across all temperatures using M-theory. It provides a lattice-consistent result for thermal QCD, aligning with recent lattice data and offering insights into deconfinement temperature.
Area of Science:
- Theoretical High Energy Physics
- Quantum Chromodynamics (QCD)
- String Theory and M-Theory
Background:
- The temperature dependence of the QCD conformal anomaly has been a missing piece in theoretical physics.
- Previous holographic duals of QCD were limited in their temperature applicability.
- Bridging the gap between theoretical models and lattice QCD results is crucial.
Purpose of the Study:
- To obtain a lattice-consistent result for the temperature dependence of the QCD conformal anomaly.
- To utilize a top-down M-theory dual valid for all temperatures of thermal QCD.
- To compare theoretical predictions with recent lattice QCD data.
Main Methods:
- Employing the M-theory uplift of the SYZ type IIA mirror.
- Utilizing a UV-complete type IIB holographic dual of large-N thermal QCD.
- Estimating higher derivative corrections in the supergravity action.
- Tuning parameters to obtain a QCD deconfinement temperature.
Main Results:
- A lattice-consistent result for the temperature dependence of the QCD conformal anomaly is obtained.
- The M-theory dual is shown to be valid for all temperatures of thermal QCD.
- A QCD deconfinement temperature consistent with lattice QCD is derived from a Hawking-Page phase transition.
Conclusions:
- The study successfully fills a critical gap in understanding thermal QCD.
- The M-theory approach provides a unified framework for studying QCD across temperatures.
- The findings offer a new avenue for comparing theoretical models with experimental/lattice data.
Related Concept Videos
01:26Divergence and Curl of Magnetic Field
3.8K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
3.8K
01:25Divergence and Curl of Electric Field
6.9K
The divergence of a vector is a measure of how much the vector spreads out (diverges) from a point. For example, an electric field vector diverges from the positive charge and converges at the negative charge. The divergence of an electric field is derived using Gauss's law and is equal to the charge density divided by the permittivity of space. Mathematically, it is expressed as
6.9K
01:23Magnetic Field due to Moving Charges
11.1K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
11.1K
01:08Spin–Spin Coupling Constant: Overview
1.3K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.3K
01:26Transmission-Line Differential Equations
867
Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from...
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from...
867
01:23Electric Field of a Charged Disk
2.9K
The simplest case of a surface charge distribution is the uniformly charged disk. Calculating its electric field also helps us calculate the electric field of a large plane of charge.
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
2.9K