Hello.

I am Hersh Singh, a postdoctoral researcher in theoretical physics at the InQubator for Quantum Simulation at the University of Washington, Seattle. I am also affiliated with the Institute for Nuclear Theory.

I am interested in studies of strongly coupled quantum field theories, with applications to nuclear and high-energy physics, using the powerful tools of lattice field theory, effective field theory and quantum information science.

Before this, I got a

• PhD in Physics from Duke University (2014-2020) working on lattice and effective field theories with Profs. Roxanne Springer and Shaliesh Chandrasekharan, and a
• Bachelors and Masters in Electrical Engineering from Indian Institute of Technology Madras (2009-2014), working with Prof. Suresh Govindarajan.

Some of my recent work includes

• qubit regularizations of quantum field theories: with the goal of constructing regularizations of interesting QFTs for the quantum simulation of QFTs
• application of nuclear effective field theory: large-N expansion in two-body systems, and three-body systems
• many of my ongoing projects are around using study aspects of quantum information in QFTs, using worm algorithms and tensor network methods

More details on my research are here and a complete list of publications can be found here (or on INSPIRE). During my final year of grad school at Duke University, I taught a mini-course on renormalization group (Spring 2020), which I thoroughly enjoyed.

## Publications

1. “Qubit Regularization of Asymptotic Freedom” (2020)
Tanmoy Bhattacharya, Alexander J. Buser, Shailesh Chandrasekharan, Rajan Gupta, Hersh Singh
Phys.Rev.Lett. 126 (2021) 17, 172001
DOI:10.1103/PhysRevLett.126.172001. arXiv:2012.02153
2. “Qubit $O(N)$ nonlinear sigma models” (2019)
Hersh Singh
arXiv:1911.12353
3. “A qubit regularization of the $O(3)$ sigma model” (2019)
Hersh Singh and Shailesh Chandrasekharan
Phys. Rev. D 100 (Sept. 2019), p. 054505
DOI:10.1103/PhysRevD.100.054505. arXiv:1905.13204
4. “Few-body physics on a space-time lattice in the worldline approach” (2019)
Hersh Singh and Shailesh Chandrasekharan
Phys. Rev. D 99 (7 Apr. 2019), p. 074511
DOI:10.1103/PhysRevD.99.074511. arXiv:1812.05080
5. “Worldline approach to few-body physics on the lattice” (2018)
Hersh Singh
PoS LATTICE2018(2018), p. 158
DOI:10.22323/1.334.0158. arXiv:1812.02364
6. “Large-$N_c$ relationships among two-derivative pionless effective field theory couplings” (2018)
Matthias R. Schindler, Hersh Singh, and Roxanne P. Springer
Phys. Rev. C 98 (4 Oct. 2018), p. 044001
DOI:10.1103/PhysRevC.98.044001. arXiv:1805.06056

## Recent Talks

1. “Entanglement harvesting from the vacuum of quantum spin chains”
Syracuse University - HEP/Cosomology Seminar (Novemeber 15, 2021)
2. “Entanglement harvesting from the vacuum of quantum spin chains”
Fall Meeting of the APS Division of Nuclear Physics (DNP) Meeting 2021 (October 13, 2021)
3. “Qubit Regularization of Asymptotic Freedom”
Lattice 2021 (July 26, 2021)
Video | Slides
4. A couple of lectures on “Hamiltonian Time Evolution” for the Quantum Computing Internship for Physics Undergraduates
Fermilab (July 20, 2021)
Videos: Lecture 1, Lecture 2 | Notes
5. Qubit Regularization of Asymptotic Freedom
Indian Insitute of Technology Madras – Dual Mysteries of Gauge and Gravity Online Seminar Series (April 19, 2021)
Video
6. Qubit Regularization of Asymptotic Freedom
Brookhaven National Lab (January 4, 2021)
7. Qubit models and large charge effective field theories
Fall Meeting of the APS Division of Nuclear Physics (DNP) 2020 (October 31, 2020)