Sun - 10/23/22

There is no new related paper today

There is no new related paper today

  1. [2210.10797] - Quantum Gravity Bounds on N=1 Effective Theories in Four Dimensions - Luca Martucci, Nicolo Risso, Timo Weigand

  2. [2210.10846] - Solvable Models of Quantum Black Holes: A Review on Jackiw-Teitelboim Gravity - Thomas G. Mertens, Gustavo J. Turiaci

  3. [2210.11066] - Holography of Information in AdS/CFT - Robert de Mello Koch, Garreth Kemp

  4. [2210.11150] - Classical Lie Bialgebras for AdS/CFT Integrability by Contraction and Reduction - Niklas Beisert, Egor Im

  5. [2210.11356] - The functional $f(R)$ approximation - Tim R. Morris, Dalius Stulga

  6. [2210.11473] - The ZZ annulus one-point function in non-critical string theory: A string field theory analysis - Dan Stefan Eniceicu, Raghu Mahajan, Pronobesh Maity, Chitraang Murdia, Ashoke Sen

Sat - 10/22/22

There is no new related paper today

There is no new related paper today

  1. [2210.10797] - Quantum Gravity Bounds on N=1 Effective Theories in Four Dimensions - Luca Martucci, Nicolo Risso, Timo Weigand

  2. [2210.10846] - Solvable Models of Quantum Black Holes: A Review on Jackiw-Teitelboim Gravity - Thomas G. Mertens, Gustavo J. Turiaci

  3. [2210.11066] - Holography of Information in AdS/CFT - Robert de Mello Koch, Garreth Kemp

  4. [2210.11150] - Classical Lie Bialgebras for AdS/CFT Integrability by Contraction and Reduction - Niklas Beisert, Egor Im

  5. [2210.11356] - The functional $f(R)$ approximation - Tim R. Morris, Dalius Stulga

  6. [2210.11473] - The ZZ annulus one-point function in non-critical string theory: A string field theory analysis - Dan Stefan Eniceicu, Raghu Mahajan, Pronobesh Maity, Chitraang Murdia, Ashoke Sen

Fri - 10/21/22

There is no new related paper today

There is no new related paper today

  1. [2210.10797] - Quantum Gravity Bounds on N=1 Effective Theories in Four Dimensions - Luca Martucci, Nicolo Risso, Timo Weigand

  2. [2210.10846] - Solvable Models of Quantum Black Holes: A Review on Jackiw-Teitelboim Gravity - Thomas G. Mertens, Gustavo J. Turiaci

  3. [2210.11066] - Holography of Information in AdS/CFT - Robert de Mello Koch, Garreth Kemp

  4. [2210.11150] - Classical Lie Bialgebras for AdS/CFT Integrability by Contraction and Reduction - Niklas Beisert, Egor Im

  5. [2210.11356] - The functional $f(R)$ approximation - Tim R. Morris, Dalius Stulga

  6. [2210.11473] - The ZZ annulus one-point function in non-critical string theory: A string field theory analysis - Dan Stefan Eniceicu, Raghu Mahajan, Pronobesh Maity, Chitraang Murdia, Ashoke Sen

Thu - 10/20/22

Quantization of measure in gravitation

  • Authors: Vladimir Dzhunushaliev, Vladimir Folomeev
  • Subjects: General Relativity and Quantum Cosmology (gr-qc)
  • Arxiv link: https://arxiv.org/abs/2210.10388
  • Abstract Using the Radon-Nikodym theorem concerning the relation between any two measures, as well as the methods employed in loop quantum gravity, it is shown that, in gravitation, one can quantize any measure which is not even associated with metric. We have considered the simplest case where the proportionality coefficient between two operators of measure (the Radon-Nikodym derivative) is some function. The result is that in the right-hand side of the commutation relations for the measure the fundamental length becomes a variable quantity, and this can lead to smoothing the singularity. The case where the Radon-Nikodym derivative is an operator is also under discussion. Classical and quantum theories on the background of space endowed with quantum measure are under consideration.

There is no new related paper today

  1. [2210.10658] - Barrow entropy and stochastic gravitational wave background spectrum generated from cosmological QCD phase transition - Zhong-Wen Feng

  2. [2210.10057] - The Tameness of Quantum Field Theory, Part I – Amplitudes - Michael R. Douglas, Thomas W. Grimm, Lorenz Schlechter

  3. [2210.10457] - Charged AdS black hole and the quantum tunneling from black hole to white hole - T. H. Phat, N. T. Anh, Toan T. Nguyen, H. V. Quyet

  4. [2210.10510] - Pure spinor formulation of the superstring and its applications - Nathan Berkovits, Carlos R. Mafra

Wed - 10/19/22

There is no new related paper today

There is no new related paper today

  1. [2210.10034] - A fresh view on string orbifolds - Stefano Giaccari, Roberto Volpato

Tue - 10/18/22

There is no new related paper today

There is no new related paper today

  1. [2210.08586] - The equivalence principle and inertial-gravitational decoherence - Giorgio Torrieri

  2. [2210.08783] - Thread/State correspondence: from bit threads to qubit threads - Yi-Yu Lin, Jie-Chen Jin

  3. [2210.09271] - Gauge invariant renormalizability of quantum gravity - P.M. Lavrov, I.L. Shapiro

Mon - 10/17/22

On a novel relationship between shear and energy density at the bounce in non-singular Bianchi-I spacetimes

  • Authors: A. Meenakshi McNamara, Sahil Saini, Parampreet Singh
  • Subjects: General Relativity and Quantum Cosmology (gr-qc); Cosmology and Nongalactic Astrophysics (astro-ph.CO)
  • Arxiv link: https://arxiv.org/abs/2210.07257
  • Abstract In classical Bianchi-I spacetimes, underlying conditions for what dictates the singularity structure - whether it is anisotropic shear or energy density, can be easily determined from the generalized Friedmann equation. However, in non-singular bouncing anisotropic models these insights are difficult to obtain in the quantum gravity regime where the singularity is resolved at a non-vanishing mean volume which can be large compared to the Planck volume, depending on the initial conditions. Such non-singular models may also lack a generalized Friedmann equation making the task even more difficult. We address this problem in an effective spacetime description of loop quantum cosmology (LQC) where energy density and anisotropic shear are universally bounded due to quantum geometry effects, but a generalized Friedmann equation has been difficult to derive due to the underlying complexity. Performing extensive numerical simulations of effective Hamiltonian dynamics, we bring to light a surprising, seemingly universal relationship between energy density and anisotropic shear at the bounce in LQC. For a variety of initial conditions for a massless scalar field, an inflationary potential, and two types of ekpyrotic potentials we find that the values of energy density and the anisotropic shear at the quantum bounce follow a novel parabolic relationship which reveals some surprising results about the anisotropic nature of the bounce, such as the maximum value of the anisotropic shear at the bounce is reached when the energy density reaches approximately half of its maximum allowed value. The relationship we find can prove very useful for developing our understanding of the degree of anisotropy of the bounce, isotropization of the post-bounce universe, and discovering the modified generalized Friedmann equation in Bianchi-I models with quantum gravity corrections.

There is no new related paper today

  1. [2210.07272] - Crossing Symmetry in Matter Chern-Simons Theories at finite $N$ and $k$ - Umang Mehta, Shiraz Minwalla, Chintan Patel, Shiroman Prakash, Kartik Sharma

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