Related Experiment Video
Updated: Jul 16, 2026
07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Fuzzball solutions for black holes and D1-brane-D5-brane microstates.
Kostas Skenderis1, Marika Taylor
1Institute for Theoretical Physics, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands.
Physical Review Letters
|March 16, 2007
Summary
Fuzzball solutions and D1-brane-D5-brane microstates are linked. Charged chiral primaries have nonzero expectation values in generic fuzzball solutions, indicating they are superpositions of R states, unlike circular solutions.
Area of Science:
- String Theory
- Quantum Gravity
- Black Hole Physics
Background:
- D1-brane-D5-brane microstates are crucial for understanding black hole entropy.
- Fuzzball solutions offer a string theory description of black holes.
- R ground states are eigenstates of R charge, implying only neutral operators have nonvanishing expectation values.
Purpose of the Study:
- To investigate the relationship between fuzzball solutions and D1-brane-D5-brane microstates.
- To compute holographic 1-point functions for fuzzball solutions.
- To determine the geometric dual of R ground states.
Main Methods:
- Holographic 1-point function computation.
- Analysis of expectation values of operators on R ground states.
- Characterization of fuzzball solutions by curves.
Main Results:
- Charged chiral primaries have nonzero expectation values in generic fuzzball solutions.
- Nonzero expectation values indicate a breaking of R symmetry.
- Circular fuzzball solutions are exceptions, preserving R symmetry.
- Fuzzball solutions (except circular ones) correspond to superpositions of R states.
Conclusions:
- Generic fuzzball solutions represent superpositions of R states due to broken R symmetry.
- A proposal is made for the specific superposition corresponding to a given curve.
- The geometric dual of an R ground state is addressed.
Related Concept Videos
01:21Schwarzschild Radius and Event Horizon
No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...
01:10Detection of Black Holes
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
01:03Atomic Nuclei: Nuclear Spin State Overview
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
01:18Singularity Functions for Bending Moment
Singularity functions simplify the representation of bending moments in beams subjected to discontinuous loading, allowing the use of a single mathematical expression. For a supported beam AB, with uniform loading from its midpoint M to the right side end B, the approach involves conceptual 'cuts' at specific points to determine the bending moment in each segment. By cutting the beam at a point between A and M, the bending moment for the segment before reaching midpoint M is represented using a...
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
01:12Fermi Level Dynamics
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...