Gauge/Gravity Duality Quiz
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Questions and Answers

Which research area is of central importance in this text?

  • Phase transitions
  • Neutron star models
  • Gauge/gravity duality (correct)
  • Quantum fluctuations

What is the problem with the equation of state (EoS) in neutron star models?

  • It is based on perturbation theories
  • It assumes weak field
  • It excludes the description of magnetic field (correct)
  • It requires numerical solutions

How does the proposal aim to describe the magnetic field of neutron stars?

  • By using numerical solutions
  • By studying perturbation theories
  • By applying weak field approximation methods
  • By utilizing gauge/gravity duality (correct)

Which theories does gauge/gravity duality connect?

<p>Quantum field theory and general relativity (D)</p> Signup and view all the answers

What is the holographic principle?

<p>The entire information content of a quantum gravity theory in a given volume can be encoded in an effective theory at the boundary surface of this volume. (B)</p> Signup and view all the answers

What are the applications of gauge/gravity duality to strongly coupled systems?

<p>It maps strongly coupled quantum field theories to more tractable classical gravity theories. (D)</p> Signup and view all the answers

Which principle does string theory give rise to?

<p>The holographic principle (B)</p> Signup and view all the answers

What is the AdS/CFT correspondence?

<p>A proposal by Maldacena (B)</p> Signup and view all the answers

What does the AdS/CFT correspondence stand for?

<p>Anti-de Sitter space and conformal field theory (D)</p> Signup and view all the answers

What is the ratio of shear viscosity to entropy density, known as η/s?

<p>A result of the AdS/CFT correspondence (D)</p> Signup and view all the answers

What is gauge/gravity duality?

<p>Gauge/gravity duality is a major new development within theoretical physics that brings together string theory, quantum field theory, and general relativity.</p> Signup and view all the answers

What does gauge/gravity duality provide?

<p>Gauge/gravity duality provides new links between quantum theory and gravity based on string theory.</p> Signup and view all the answers

What are the applications of gauge/gravity duality?

<p>Gauge/gravity duality has applications in elementary particle physics, nuclear physics, and condensed matter physics.</p> Signup and view all the answers

What is the holographic principle?

<p>The holographic principle states that the entire information content of a quantum gravity theory in a given volume can be encoded in an effective theory at the boundary surface of this volume.</p> Signup and view all the answers

What does the holographic principle imply about the boundary theory?

<p>The theory describing the boundary degrees of freedom encodes all information about the bulk degrees of freedom and their dynamics, and vice-versa.</p> Signup and view all the answers

What is the holographic principle also known as?

<p>The holographic principle is also referred to as holography.</p> Signup and view all the answers

What is the holographic principle expected to be realized in?

<p>The holographic principle is expected to be realized in many examples.</p> Signup and view all the answers

What is the precise form of the boundary theory in many cases?

<p>In many cases, the precise form of the boundary theory is unknown.</p> Signup and view all the answers

What is the duality of gauge/gravity used for?

<p>The duality maps strongly coupled quantum field theories to more tractable classical gravity theories.</p> Signup and view all the answers

What are some examples of strongly coupled systems?

<p>Examples include theories similar to low-energy quantum chromodynamics (QCD) and models for quantum phase transitions relevant in condensed matter systems.</p> Signup and view all the answers

What is the gauge/gravity duality?

<p>The gauge/gravity duality is a conjecture that a quantum field theory with a gauge symmetry at the boundary is equivalent to a theory involving gravity in the bulk.</p> Signup and view all the answers

What are dualities in physics?

<p>Dualities in physics refer to different equivalent formulations of a physical theory.</p> Signup and view all the answers

Why are dualities useful?

<p>Dualities are useful because they allow physical processes that are hard to calculate in one formulation to be obtained easily in another.</p> Signup and view all the answers

What is the AdS/CFT correspondence?

<p>The AdS/CFT correspondence is a gauge/gravity duality between Anti-de Sitter space and conformal field theory.</p> Signup and view all the answers

What symmetries are realized in the AdS/CFT correspondence?

<p>The AdS/CFT correspondence displays both super symmetry and conformal symmetry.</p> Signup and view all the answers

What is N = 4 Super Yang-Mills theory?

<p>N = 4 Super Yang-Mills theory is a four-dimensional superconformal quantum field theory.</p> Signup and view all the answers

What is the quark-gluon plasma?

<p>The quark-gluon plasma is a strongly coupled state of matter observed at temperatures above the QCD deconfinement temperature.</p> Signup and view all the answers

What is η/s?

<p>η/s is the ratio of shear viscosity to entropy density.</p> Signup and view all the answers

What is the concept of universality?

<p>Universality means that different gravity theories give the same result for η/s, regardless of their structure, dimensionality, and field content.</p> Signup and view all the answers

What other field of physics has gauge/gravity duality been applied to?

<p>Gauge/gravity duality has also been applied to strongly coupled systems in condensed matter physics.</p> Signup and view all the answers

What is the problem with including the magnetic field in the equation of state (EoS) of neutron star models?

<p>Numerical solutions of the EoS are based on weak field perturbation theories, which cannot describe strong magnetic fields.</p> Signup and view all the answers

What research area is of central importance in this text?

<p>The central research area in this text is gauge/gravity duality.</p> Signup and view all the answers

How does the proposal aim to describe the magnetic field of neutron stars?

<p>The proposal aims to use gauge/gravity duality to describe the magnetic field of neutron stars.</p> Signup and view all the answers

What is the significance of the new research area of gauge/gravity duality?

<p>The new research area of gauge/gravity duality is of central importance due to its connection between theories of gravity and gauge theories.</p> Signup and view all the answers

What is the equation of state (EoS) used to characterize neutron star models?

<p>The equation of state (EoS) is used to characterize neutron star models based on their parameters such as mass, density, pressure, and temperature.</p> Signup and view all the answers

What is the main challenge in including the magnetic field in the equation of state (EoS) of neutron star models?

<p>The main challenge is that the magnetic field is a strong field and cannot be described by any approximation methods used in the EoS.</p> Signup and view all the answers

What is the role of perturbation theories in the numerical solution of the neutron star's parameters?

<p>Perturbation theories are used in the numerical solution to account for weak field effects in the neutron star's parameters.</p> Signup and view all the answers

How does the gauge/gravity duality theory allow for the description of the magnetic field of neutron stars?

<p>The gauge/gravity duality theory allows for the mapping of the strong magnetic field of neutron stars into a weak field in the dual theory.</p> Signup and view all the answers

What methods could be used to obtain the equation of state (EoS) that includes the magnetic field?

<p>Approximation methods could be used to obtain the equation of state (EoS) that includes the magnetic field in the dual theory of gauge/gravity duality.</p> Signup and view all the answers

What is the theoretical description of neutron star models based on?

<p>The theoretical description of neutron star models is based on the equation of state (EoS) that characterizes their parameters such as mass, density, pressure, and temperature.</p> Signup and view all the answers

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