157 citations · 572 across the 18 of their papers we have counts for
18 papers
Entangling power of neural networks
Taige Wang, Nisarga Paul, Liang Fu
Characterizing the complexity of correlations between subsystems is a fundamental task across information theory, machine learning, and science. In quantum physics, neural networks…
Emergent curved space and gravitational lensing in quantum materials
Yugo Onishi, Nisarga Paul, Liang Fu
We show that an effective gravitational field naturally emerges in quantum materials with long-wavelength spin (or pseudospin) textures. When the itinerant electrons' spin strongly…
Shining light on collective modes in moiré fractional Chern insulators
Nisarga Paul, Ahmed Abouelkomsan, Aidan Reddy +1
We show that collective excitations and optical responses of moiré fractional Chern insulators (FCIs) drastically differ from those of standard fractional quantum Hall (FQH) states…
Designing (higher) Hall crystals
Nisarga Paul, Gal Shavit, Liang Fu
We introduce a novel platform for realizing interaction-induced Hall crystals with diverse Chern numbers . This platform consists of a two-dimensional semiconductor or graphene…
Band structure engineering using a moiré polar substrate
Xirui Wang, Cheng Xu, Samuel Aronson +11
Applying long wavelength periodic potentials on quantum materials has recently been demonstrated to be a promising pathway for engineering novel quantum phases of matter. Here, we…
Compressible quantum liquid with vanishing Drude weight
Ahmed Abouelkomsan, Nisarga Paul, Ady Stern +1
We explore the possibility of quantum liquids that are compressible but have vanishing DC conductivity in the absence of disorder. We show that the composite Fermi liquid emerging…
Non-Abelian fractionalization in topological minibands
Aidan P. Reddy, Nisarga Paul, Ahmed Abouelkomsan +1
Motivated by the recent discovery of fractional quantum anomalous Hall states in moiré systems, we consider the possibility of realizing non-Abelian phases in topological minibands…
Dimensional reduction from magnetic field in moiré superlattices
Nisarga Paul, Philip J. D. Crowley, Liang Fu
Moiré materials provide a highly tunable platform in which novel electronic phenomena can emerge. We study strained moiré materials in a uniform magnetic field and predict highly a…
Electronic ratchet effect in a moiré system: signatures of excitonic ferroelectricity
Zhiren Zheng, Xueqiao Wang, Ziyan Zhu +17
Electronic ferroelectricity represents a new paradigm where spontaneous symmetry breaking driven by electronic correlations, in contrast to traditional lattice-driven ferroelectric…
Zero-field composite Fermi liquid in twisted semiconductor bilayers
Hart Goldman, Aidan P. Reddy, Nisarga Paul +1
Recent experiments have produced evidence for fractional quantum anomalous Hall (FQAH) states at zero magnetic field in the semiconductor moiré superlattice system MoTe. Her…
Superconductivity and strong interactions in a tunable moiré quasiperiodic crystal
Aviram Uri, Sergio C. de la Barrera, Mallika T. Randeria +10
Electronic states in quasiperiodic crystals generally preclude a Bloch description, rendering them simultaneously fascinating and enigmatic. Owing to their complexity and relative…
Area-law entanglement from quantum geometry
Nisarga Paul
Quantum geometry, which encompasses both Berry curvature and the quantum metric, plays a key role in multi-band interacting electron systems. We study the entanglement entropy of a…
Moiré Landau fans and magic zeros
Nisarga Paul, Philip J. D. Crowley, Trithep Devakul +1
We study the energy spectrum of moiré systems under a uniform magnetic field. The superlattice potential generally broadens Landau levels into Chern bands with finite bandwidth. Ho…
Giant proximity exchange and flat Chern band in 2D magnet-semiconductor heterostructures
Nisarga Paul, Yang Zhang, Liang Fu
Van der Waals (vdW) heterostructures formed by two-dimensional magnets and semiconductors have provided a fertile ground for fundamental science and for spintronics. We present fir…
Topological magnetic textures in magnetic topological insulators
Nisarga Paul, Liang Fu
The surfaces of intrinsic magnetic topological insulators (TIs) host magnetic moments exchange-coupled to Dirac electrons. We study the magnetic phases arising from tuning the elec…
The Soft -Matrix in Gravity
Elizabeth Himwich, Sruthi A. Narayanan, Monica Pate +2
The gravitational -matrix defined with an infrared (IR) cutoff factorizes into hard and soft factors. The soft factor is universal and contains all the IR and collinea…
Quantum Diffusion in the Strong Tunneling Regime
Nisarga Paul, Ariel Amir
We study the spread of a quantum-mechanical wavepacket in a noisy environment, modeled using a tight-binding Hamiltonian. Despite the coherent dynamics, the fluctuating environment…
Infrared Finiteness and Forward Scattering
Christopher Frye, Holmfridur Hannesdottir, Nisarga Paul +2
Infrared divergences have long been heralded to cancel in sufficiently inclusive cross-sections, according to the famous Kinoshita-Lee-Nauenberg theorem which mandates an initial a…