Josiah Couch

Josiah Couch
University of Texas at Austin | UT · Department of Physics

BSc

About

6
Publications
502
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365
Citations
Introduction
I am a Ph.D. physics student at the University of Texas at Austin working primarily in AdS/CFT. My recent work has been focused on the topic of 'holographic complexity'.
Additional affiliations
August 2013 - present
University of Texas at Austin
Position
  • Research Assistant
Education
August 2013 - May 2019
University of Texas at Austin
Field of study
  • Physics
August 2009 - August 2013
Oklahoma State University - Stillwater
Field of study
  • Physics and Mathematics

Publications

Publications (6)
Preprint
We present a general theory of quantum information propagation in chaotic quantum many-body systems. The generic expectation in such systems is that quantum information does not propagate in localized form; instead, it tends to spread out and scramble into a form that is inaccessible to local measurements. To characterize this spreading, we define...
Article
Full-text available
We study holographic subregion complexity, and its possible connection to purification complexity suggested recently by Agón et al. In particular, we study the conjecture that subregion complexity is the purification complexity by considering holographic purifications of a holographic mixed state. We argue that these include states with any amount...
Article
Full-text available
A bstract The previously proposed “Complexity=Volume” or CV-duality is probed and developed in several directions. We show that the apparent lack of universality for large and small black holes is removed if the volume is measured in units of the maximal time from the horizon to the “final slice” (times Planck area). This also works for spinning bl...
Preprint
The previously proposed "Complexity=Volume" or CV-duality is probed and developed in several directions. We show that the apparent lack of universality for large and small black holes is removed if the volume is measured in units of the maximal time from the horizon to the "final slice" (times Planck area). This also works for spinning black holes....
Article
Full-text available
A bstract We study the holographic complexity of noncommutative field theories. The four-dimensional $$ \mathcal{N}=4 $$ N = 4 noncommutative super Yang-Mills theory with Moyal algebra along two of the spatial directions has a well known holographic dual as a type IIB supergravity theory with a stack of D3 branes and non-trivial NS-NS B fields. We...
Article
Full-text available
In this paper, we study the physical significance of the thermodynamic volumes of black holes along two different, but complementary, directions. In the first half of the paper, we make use of the Iyer-Wald charge formalism to compute the volume of a particularly hairy black hole. Our computation clarifies and explains existing results, and serves...

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