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Entwinement and the emergence of spacetime

- V. Balasubramanian, Borun D. Chowdhury, Bartłlomiej Czech, J. Boer
- Physics
- 23 June 2014

A bstractIt is conventional to study the entanglement between spatial regions of a quantum field theory. However, in some systems entanglement can be dominated by “internal”, possibly gauged, degrees… Expand

Bulk curves from boundary data in holography

- V. Balasubramanian, Borun D. Chowdhury, B. Czech, J. Boer, M. Heller
- Physics
- 8 April 2014

We embed spherical Rindler space—a geometry with a spherical hole in its center—in asymptotically anti– de Sitter (AdS) spacetime and show that it carries a gravitational entropy proportional to the… Expand

Radiation from the non-extremal fuzzball

- Borun D. Chowdhury, S. Mathur
- Physics
- 29 November 2007

The fuzzball proposal says that the information of the black hole state is distributed throughout the interior of the horizon in a 'quantum fuzz'. There are special microstates where in the dual CFT… Expand

A hole-ographic spacetime

- V. Balasubramanian, Borun D. Chowdhury, B. Czech, J. Boer, M. Heller
- Physics
- 15 October 2013

We embed spherical Rindler space – a geometry with a spherical hole in its center – in asymptotically AdS spacetime and show that it carries a gravitational entropy proportional to the area of the… Expand

Fractional brane state in the early Universe

- Borun D. Chowdhury, S. Mathur
- Physics
- 29 November 2006

In the early Universe matter was crushed to high densities, in a manner similar to that encountered in gravitational collapse to black holes. String theory suggests that the large entropy of black… Expand

Intergalactic magnetic field spectra from diffuse gamma-rays

- Wenlei Chen, Borun D. Chowdhury, F. Ferrer, H. Tashiro, T. Vachaspati
- Physics
- 10 December 2014

Non-vanishing parity-odd correlators of gamma ray arrival directions observed by Fermi-LAT indicate the existence of a helical intergalactic magnetic field (Tashiro et al.2013). We successfully test… Expand

Emission from the D1D5 CFT: higher twists

- Steven G. Avery, Borun D. Chowdhury
- Physics
- 10 July 2009

We study a certain class of nonextremal D1D5 geometries and their ergoregion emission. Using a detailed CFT computation and the formalism developed in [1], we compute the full spectrum and rate of… Expand

Non-extremal fuzzballs and ergoregion emission

- Borun D. Chowdhury, S. Mathur
- Physics
- 16 October 2008

In the traditional picture of black holes, Hawking radiation is created by pair creation from the vacuum at the horizon. In the fuzzball proposal, individual microstates do not have a horizon with… Expand

Moulting Black Holes

- I. Bena, Borun D. Chowdhury, J. Boer, S. El-Showk, M. Shigemori
- Physics
- 1 August 2011

A bstractWe find a family of novel supersymmetric phases of the D1-D5 CFT, which in certain ranges of charges have more entropy than all known ensembles. We also find bulk BPS configurations that… Expand

Emission from the D1D5 CFT

- Steven G. Avery, Borun D. Chowdhury, S. Mathur
- Physics
- 11 June 2009

It is believed that the D1D5 brane system is described by an `orbifold CFT' at a special point in moduli space. We first develop a general formulation relating amplitudes in a d-dimensional CFT to… Expand

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