56 citations · 259 across the 20 of their papers we have counts for
21 papers
Fisher-Hartwig asymptotics for non-Hermitian random matrices
Paul Bourgade, Guillaume Dubach, Lisa Hartung +1
We prove the two-dimensional analogue of the asymptotics for Toeplitz determinants with Fisher-Hartwig singularities, for general real symbols. This formula has applications to ran…
Non-intersecting Brownian Motions and Gaussian Multiplicative Chaos
Ahmet Keles
We obtain Fisher-Hartwig asymptotics with root and jump type singularities in space-time under the law of the stationary Hermitian Ornstein-Uhlenbeck process, which serve as a dyna…
Rotating anisotropic Bose gas with large number of vortices
A. Keles
Rapidly rotating atomic gases provide a platform for studying phenomena akin to type-II superconductors and quantum Hall systems. Recently, these systems have attracted renewed int…
Pairing from repulsion in a two-dimensional Fermi gas with soft-core interactions
Ahmet Keles, Xiaopeng Li, Erhai Zhao
We investigate a model many-body system of spinless Fermi gas in two dimensions, where the bare two-body interaction is repulsive and takes the form of a soft-core disk potential.…
Polarized Rabi-Coupled and Spinor Boson Droplets
T. A. Yoğurt, A. Keleş, M. Ö. Oktel
Self-bound quantum droplets form when the mean-field tendency of the gas to collapse is stabilized by the effectively repulsive beyond mean-field fluctuations. The beyond mean-fiel…
Dimers, trimers, tetramers, and other multimers in a multiband Bose-Hubbard model
M. Iskin, A. Keleş
We study the bound states of identical bosons that are described by a multiband Bose-Hubbard model with generic hoppings and an attractive onsite interaction. Using a variation…
Neural-network quantum states for a two-leg Bose-Hubbard ladder under magnetic flux
K. Çeven, M. Ö. Oktel, A. Keleş
Quantum gas systems are ideal analog quantum simulation platforms for tackling some of the most challenging problems in strongly correlated quantum matter. However, they also expos…
Spinor Boson Droplets Stabilized By Spin Fluctuations
T. A. Yogurt, A. Keles, M. O. Oktel
Self-trapped droplets stabilized by quantum fluctuations have been experimentally realized in dipolar gases and binary Boson mixtures. We propose spinor Bose gases as another candi…
Rise and fall of plaquette order in Shastry-Sutherland magnet revealed by pseudo-fermion functional renormalization group
Ahmet Keles, Erhai Zhao
The Shastry-Sutherland model as a canonical example of frustrated magnetism has been extensively studied. The conventional wisdom has been that the transition from the plaquette va…
Maximum Absolute Determinants of Upper Hessenberg Bohemian Matrices
Jonathan P. Keating, Ahmet Abdullah Keleş
A matrix is called Bohemian if its entries are sampled from a finite set of integers. We determine the maximum absolute determinant of upper Hessenberg Bohemian Matrices for which…
-wave superfluidity from repulsive interaction in Rydberg-dressed Fermi gas
Ahmet Keles, Erhai Zhao, Xiaopeng Li
Interacting Fermi gas provides an ideal model system to understand unconventional pairing and intertwined orders relevant to a large class of quantum materials. Rydberg-dressed Fer…
Scrambling dynamics and many-body chaos in a random dipolar spin model
Ahmet Keles, Erhai Zhao, W. Vincent Liu
Is there a quantum many-body system that scrambles information as fast as a black hole? The Sachev-Ye-Kitaev model can saturate the conjectured bound for chaos, but it requires ran…
Renormalization group analysis of dipolar Heisenberg model on square lattice
Ahmet Keles, Erhai Zhao
We present a detailed functional renormalization group analysis of spin-1/2 dipolar Heisenberg model on square lattice. This model is similar to the well known - model an…
Absence of long-range order in a triangular spin system with dipolar interactions
Ahmet Keles, Erhai Zhao
Antiferromagnetic Heisenberg model on the triangular lattice is perhaps the best known example of frustrated magnets, but it orders at low temperatures. Recent density matrix renor…
Theory of interacting fermions in shaken square optical lattice
Ahmet Keles, Erhai Zhao, W. Vincent Liu
We develop a theory of weakly interacting fermionic atoms in shaken optical lattices based on the orbital mixing in the presence of time-periodic modulations. Specifically, we focu…
Competing many-body instabilities in two-dimensional dipolar Fermi gases
Ahmet Keles, Erhai Zhao
Experiments on quantum degenerate Fermi gases of magnetic atoms and dipolar molecules begin to probe their broken symmetry phases dominated by the long-range, anisotropic dipole-di…
Weyl nodes in periodic structures of superconductors and spin active materials
Ahmet Keles, Erhai Zhao
Motivated by recent progress in epitaxial growth of proximity structures of s-wave superconductors (S) and spin-active materials (M), we show that the periodic structure of S and M…
Mott transition in a two-leg Bose-Hubbard ladder under an artificial magnetic field
Ahmet Keleş, M. Ö. Oktel
We consider the Bose-Hubbard model on a two-leg ladder under an artificial magnetic field, and investigate the superfluid-to-Mott insulator transition in this setting. Recently, th…
Theory of disordered unconventional superconductors
A. Keles, A. V. Andreev, S. A. Kivelson +1
In contrast to conventional s-wave superconductivity, unconventional (e.g. p or d-wave) superconductivity is strongly suppressed even by relatively weak disorder. Upon approaching…
Vortex lattices in dipolar two-component Bose-Einstein condensates
N. Ghazanfari, A. Keleş, M. Ö. Oktel
We consider a rapidly rotating two-component Bose-Einstein condensate with short-range s-wave interactions as well as dipolar coupling. We calculate the phase diagram of vortex lat…
Electron transport in p-wave superconductor-normal metal junctions
A. Keles, A. V. Andreev, B. Z. Spivak
We study low temperature electron transport in p-wave superconductor-insulator-normal metal junctions. In diffusive metals the p-wave component of the order parameter decays expone…