236 citations · 598 across the 16 of their papers we have counts for
16 papers
Pushing the Classical Frontier of 1D Fermi-Hubbard Quench Dynamics Beyond Current Quantum Simulations
Roman Rausch, Sukhbinder Singh, Saeed S. Jahromi +2
Establishing quantum advantage requires comparison against the best achievable classical simulation. The Q-CTRL team recently simulated quench dynamics of the one-dimensional Fermi…
Quantum-enhanced Large Language Models on Quantum Hardware via Cayley Unitary Adapters
Borja Aizpurua, Sukhbinder Singh, Augustine Kshetrimayum +2
Large language models (LLMs) have transformed artificial intelligence, yet classical architectures impose a fundamental constraint: every trainable parameter demands classical memo…
Simulating dynamics of the two-dimensional transverse-field Ising model: a comparative study of large-scale classical numerics
Joseph Vovrosh, Sergi Julià-Farré, Wladislaw Krinitsin +11
The quantum dynamics of many-qubit systems is an outstanding problem that has recently driven significant advances in both numerical methods and programmable quantum processing uni…
Tensor network study of the spin-1/2 Heisenberg anti-ferromagnet on the Shuriken lattice
Philipp Schmoll, Augustine Kshetrimayum, Jan Naumann +2
We investigate the ground state of the spin Heisenberg anti-ferromagnet on the Shuriken lattice, also in the presence of an external magnetic field. To this end, we employ…
Finite temperature tensor network algorithm for frustrated two-dimensional quantum materials
Philipp Schmoll, Christian Balz, Bella Lake +2
Aimed at a more realistic classical description of natural quantum systems, we present a two-dimensional tensor network algorithm to study finite temperature properties of frustrat…
Scalably learning quantum many-body Hamiltonians from dynamical data
Frederik Wilde, Augustine Kshetrimayum, Ingo Roth +3
The physics of a closed quantum mechanical system is governed by its Hamiltonian. However, in most practical situations, this Hamiltonian is not precisely known, and ultimately all…
Entanglement estimation in tensor network states via sampling
Noa Feldman, Augustine Kshetrimayum, Jens Eisert +1
We introduce a method for extracting meaningful entanglement measures of tensor network states in general dimensions. Current methods require the explicit reconstruction of the den…
Pinwheel valence-bond-crystal ground state of the spin- Heisenberg antiferromagnet on the lattice
Nikita Astrakhantsev, Francesco Ferrari, Nils Niggemann +9
We investigate the nature of the ground-state of the spin- Heisenberg antiferromagnet on the lattice by complementary state-of-the-art numerical techniques,…
The classical two-dimensional Heisenberg model revisited: An -symmetric tensor network study
Philipp Schmoll, Augustine Kshetrimayum, Jens Eisert +2
The classical Heisenberg model in two spatial dimensions constitutes one of the most paradigmatic spin models, taking an important role in statistical and condensed matter physics…
Quantum time crystals with programmable disorder in higher dimensions
A. Kshetrimayum, M. Goihl, D. M. Kennes +1
We present fresh evidence for the presence of discrete quantum time crystals in two spatial dimensions. Discrete time crystals are intricate quantum systems that break discrete tim…
Two-body repulsive bound pairs in multi-body interacting Bose-Hubbard model
Suman Mondal, Augustine Kshetrimayum, Tapan Mishra
We study the system of multi-body interacting bosons on a two dimensional optical lattice and analyze the formation of bound bosonic pairs in the context of the Bose-Hubbard model.…
Simulation methods for open quantum many-body systems
Hendrik Weimer, Augustine Kshetrimayum, Román Orús
Coupling a quantum many-body system to an external environment dramatically changes its dynamics and offers novel possibilities not found in closed systems. Of special interest are…
A simple tensor network algorithm for two-dimensional steady states
Augustine Kshetrimayum, Hendrik Weimer, Roman Orus
Understanding dissipation in 2D quantum many-body systems is a remarkably difficult open challenge. Here we show how numerical simulations for this problem are possible by means of…
The spin-1/2 Kagome XXZ model in a field: competition between lattice nematic and solid orders
Augustine Kshetrimayum, Thibaut Picot, Roman Orus +1
We study numerically the spin-1/2 XXZ model in a field on an infinite Kagome lattice. We use different algorithms based on infinite Projected Entangled Pair States (iPEPS) for this…
Symmetry-protected intermediate trivial phases in quantum spin chains
Augustine Kshetrimayum, Hong-Hao Tu, Roman Orus
Symmetry-protected trivial (SPt) phases of matter are the product-state analogue of symmetry-protected topological (SPT) phases. This means, SPt phases can be adiabatically connect…
All spin-1 topological phases in a single spin-2 chain
Augustine Kshetrimayum, Hong-Hao Tu, Roman Orus
Here we study the emergence of different Symmetry-Protected Topological (SPT) phases in a spin-2 quantum chain. We consider a Heisenberg-like model with bilinear, biquadratic, bicu…