55 citations · 212 across the 15 of their papers we have counts for
10 papers · 1 filter
Topological terms with qubit regularization and relativistic quantum circuits
Tanmoy Bhattacharya, Shailesh Chandrasekharan, Rajan Gupta +2
Qubit regularization provides a rich framework to explore quantum field theories. The freedom to choose how the important symmetries of the theory are embedded in the qubit regular…
Vacuum Entanglement Harvesting in the Ising Model
Hersh Singh, Tanmoy Bhattacharya, Shailesh Chandrasekharan +1
The low-energy states of quantum many body systems, such as spin chains, are entangled. Using tensor network computations, we demonstrate a protocol that distills Bell pairs out of…
Lattice regularizations of vacua: Anomalies and qubit models
Mendel Nguyen, Hersh Singh
Anomalies are a powerful way to gain insight into possible lattice regularizations of a quantum field theory. In this work, we argue that the continuum anomaly for a given symmetry…
From asymptotic freedom to vacua: Qubit embeddings of the O(3) nonlinear model
Stephan Caspar, Hersh Singh
Conventional lattice formulations of vacua in the -dimensional nonlinear sigma model suffer from a sign problem. Here, we construct the first sign-problem-fr…
Large-charge conformal dimensions at the Wilson-Fisher fixed point
Hersh Singh
Recent work using a large-charge expansion for the Wilson-Fisher conformal field theory has shown that the anomalous dimensions of large-charge operators can be expressed in…
Space-time symmetric qubit regularization of the asymptotically free two-dimensional O(4) model
Junzhe Zhou, Hersh Singh, Tanmoy Bhattacharya +2
We explore if space-time symmetric lattice field theory models with a finite Hilbert space per lattice site can reproduce asymptotic freedom in the two-dimensional model. We…
Qubit regularization of asymptotic freedom
Tanmoy Bhattacharya, Alexander J. Buser, Shailesh Chandrasekharan +2
We provide strong evidence that the asymptotically free (1+1)-dimensional non-linear O(3) sigma model can be regularized using a quantum lattice Hamiltonian, referred to as the "He…
Qubit regularized nonlinear sigma models
Hersh Singh
Motivated by the prospect of quantum simulation of quantum field theories, we formulate the nonlinear sigma model as a "qubit" model with an -dimensional local Hilber…
A qubit regularization of the sigma model
Hersh Singh, Shailesh Chandrasekharan
We construct a qubit regularization of the non-linear sigma model in two and three spatial dimensions using a quantum Hamiltonian with two qubits per lattice site. Using a w…
Few-body physics on a space-time lattice in the worldline approach
Hersh Singh, Shailesh Chandrasekharan
We formulate the physics of two species of non-relativistic hard-core bosons with attractive or repulsive delta function interactions on a space-time lattice in the worldline appro…