# Karpur Shukla

**Biography:** I'm currently a PhD student at the Laboratory for Emerging Technologies at Brown University. My interests lie at the intersection of geometric phenomena in quantum systems, conformal field theory, quantum thermodynamics, and condensed matter theory. In particular, I'm deeply interested in geometric properties of Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) dynamics and their applications to condensed matter systems, quantum information processing, and classical information processing. I'm also interested in the properties of conformal field theories (CFTs) out of equilibrium, and the ways by which nonequilibrium CFT phenomena manifest in condensed matter models. Finally, I'm interested in the consequences that renormalisation group transformations have for resource theories.

**At present**, my work focuses on applications of Gorini-Kossakowski-Lindblad-Sudarshan (GKSL) dynamics with multiple steady states, resource theories, and shortcuts-to-adiabaticity to physical models for reversible computing and conformally invariant systems. *Reversible computing* is a paradigm of computing that relies on preserving and unwinding correlations, which allows us to avoid the energy cost resulting from irretrievably ejecting information stored in memory devices into the environment. Although systems implementing reversible logic were first proposed as early as 1978 by Fredkin and Toffoli; designing a model of fast, fully adiabatic, and scalable classical reversible operations remains an ongoing and active area of interest. * Here*, the language of GKSL dynamics, shortcuts-to-adiabaticity, resource theories, and quantum speed limits are especially suited to helping us design our desired models for reversible computing. I'm currently working alongside several others to develop these models.

**My other work** focuses on the consequences that conformal invariance can have for resource theories, as well as the lessons resource theories can have for conformally invariant systems. Recent results by Bernamonti *et al.* for holographic second laws, Guarnieri *et al.* for relationships between stochastic quantum work techniques and resource theories, and Faist and Renner on new information measures for the work cost of quantum processes, and Albert *et al.* on the geometric properties of Lindbladians themselves have substantial implications for systems described by CFTs. * My interest here* is in examining what lessons these results have for CFTs: in particular, understanding whether stochastic quantum work techniques can be expressed for CFTs via the holographic second laws, where an extension to the holographic second laws can be developed using this new information measure, and what lessons we may derive for CFTs out of equilibrium with degenerate steady states.

**Before my current appointment**, I was a research fellow and visiting faculty member at the Department of Applied Mathematics at Flame University. I received my M.Sci. in physics from Carnegie Mellon University in 2016, and my B.Sci. in physics from Carnegie Mellon University in 2014. There, I worked under Di Xiao on optoelectronic phenomena on the surfaces of topological insulators, in particular examining properties of the photogalvanic effect on the surfaces of topological insulators at zero and finite temperature. I also had the brief opportunity to work on curve fitting for experimental soft condensed matter physics under Stephanie Tristram-Nagle, as well as on analytic analysis of the dynamical RG flow of the Ising model under Robert Swendsen.

**Field(s) of Research:** Computer Science Engineering to Address Energy Costs, General Non-equilibrium Statistical Physics, Logically Reversible Computing, Quantum Thermodynamics and Information Processing

## Related links

- Slides (co-authors: M. Frank, N. Missert, R. Lewis): Asynchronous Ballistic Reversible Computing Using Superconducting Elements
- Slides (co-author: M. Frank): Pathfinding Reversible Quantum Computation
- Slides (co-authors: M. Frank; R. Lewis): Implementing the Asynchronous Reversible Computing Paradigm in Josephson Junction Circuits
- Talk Video: Review of Holographic Second Laws for Conformal Field Theories Out of Equilibrium
- Slides: Review of Holographic Second Laws for Conformal Field Theories Out of Equilibrium
- Poster (co-author: M. Frank): Information Flows in Reversible Computing Out of Equilibrium, with Applications to Models of Topological Quantum Computing
- Special Session: Exploring the Ultimate Limits of Adiabatic Circuits (co-authors: M. Frank, R. Brocato; T. Conte; A. Hsia; A. Jain; N. Missert; B. Tierney)