Welcome to the Asenjo-Garcia research group at Columbia University.

Our group’s research focus is on theoretical quantum optics and its intersection with quantum information science and many-body physics. We are interested in understanding the emergence of order and self-organization in far-from equilibrium open quantum systems. We harness this understanding to develop novel protocols for quantum information storage and processing, non-linear quantum optics, and metrology.

News

April 27, 2026

Our manuscript on how Optical depth dictates universal bounds on many-body decay in atomic ensembles appears on arXiv!

January 30, 2026

Cosimo’s manuscript on Polaron-Polaritons in Subwavelength Arrays of Trapped Atoms appears on arXiv!

November 13, 2025

Silvia and Edgar’s paper on Emergent spin order and steady-state superradiance in 1D baths is on arXiv!

June 19, 2025

Edgar and Silvia’s paper on Phase-space methods for many-body quantum optics is published in Advances in Atomic, Molecular, and Optical Physics.

May 29, 2025

Our paper on Deterministic generation of photonic entangled states using decoherence free subspaces  is published in Physical Review Letters. Thanks to our collaborators Oriol and Susanne!

May 26, 2025

A new installment of our collaboration with the Stamper-Kurn group at UC Berkeley, this time on the observation of Optomechanical self-organization in a mesoscopic atom array, is published in Nature Physics.

May 2, 2025

Joseph and Silvia’s paper on Exact many-body quantum dynamics in 1D baths via superspins  is out!

May 1, 2025

Our collaboration with the Gaeta and Lipson groups on a N-Way Frequency Beamsplitter for Quantum Photonics is published in Physical Review Research!

April 14, 2025

Our paper on Ground-state selection via many-body superradiant decay is published in Physical Review Research!

Recent publications

2026

Optical depth dictates universal bounds on many-body decay in atomic ensembles

Cosimo C. Rusconi, Eric Sierra, Wai-Keong Mok, Avishi Poddar, Simon B. Jäger, Ana Asenjo-Garcia
arXiv:2604.24680 (2026)
Publisher's website BibTeX

Polaron-Polaritons in Subwavelength Arrays of Trapped Atoms

Kristian Knakkergaard Nielsen, Lukas Wangler, David Castells-Graells, J. Ignacio Cirac, Ana Asenjo-Garcia, Daniel Malz, and Cosimo C. Rusconi
arXiv:2601.21062 (2026)
Publisher's website BibTeX
2025

N-Way Frequency Beamsplitter for Quantum Photonics

R. Oliver, M. Blau, C. Joshi, X. Ji, R. Gutierrez-Jauregui, A. Asenjo-Garcia, M. Lipson, and A. L Gaeta
Physical Review Research 7, 023108 (2025)
Publisher's website BibTeX

Collectively enhanced ground-state cooling in subwavelength atomic arrays

Oriol Rubies-Bigorda, Raphael Holzinger, Ana Asenjo-Garcia, Oriol Romero-Isart, Helmut Ritsch, Stefan Ostermann, Carlos Gonzalez-Ballestero, Susanne F. Yelin, Cosimo C. Rusconi
Physical Review A 112, 023714 (2025)
Publisher's website BibTeX