40 citations · 96 across the 21 of their papers we have counts for
22 papers
Optical observation of interlayer spin correlation
Akiyoshi Park, Pranshoo Upadhyay, Andrey Grankin +16
Spin correlations govern numerous collective behaviors of quantum materials, underpinning exotic phenomena such as unconventional superconductivity and topological magnetism. In la…
Bogolyubov excitons as a microscopic origin of two-level systems
Andrey Grankin, Victor Galitski
Two-level systems (TLS) are a leading source of decoherence and dielectric loss in Josephson-junction qubits, yet their microscopic origin remains unresolved. We propose an intrins…
Signatures of quantum chaos in phonon-polariton billiards
Yinan Dong, Felix Liu, Ekrem Demirboga +11
We use scanning near-field optical microscopy to image hyperbolic phonon polaritons in hexagonal boron nitride (hBN) billiards with integrable and chaotic geometries. In Sinai bill…
Tunable viscosity across the BCS-BEC crossover
Yunxiang Liao, Andrey Grankin, Archisman Panigrahi +2
Tunable interactions make ultracold quantum gases a unique platform for exploring hydrodynamic properties in the strongly correlated regime. Of particular interest are turbulent fl…
Fluctuation engineering in cavity quantum materials
Hope M Bretscher, Lorenzo Graziotto, Marios H Michael +14
Coupling tailored electromagnetic fluctuations to materials provides a resource for controlling correlated quantum matter. By structuring the frequency, spatial, and modal distribu…
Fractional Chern insulator edges: crystalline effects and optical measurements
Yan-Qi Wang, Johannes Motruk, Andrey Grankin +1
Edge states of chiral topologically ordered phases are commonly described by chiral Luttinger liquids, effective theories that are exact only in the hydrodynamic limit. Motivated b…
Optical engineering and detection of magnetism in moiré semiconductors
Tsung-Sheng Huang, Andrey Grankin, Yu-Xin Wang +1
We present a general framework for optically inducing, controlling, and probing spin states in moiré systems. In particular, we demonstrate that applying Raman optical drives to mo…
Enhanced Cooper pairing in nano-patterned metals
Masoud Mohammadi-Arzanagh, Andrey Grankin, Victor Galitski +1
Nano-patterning has been shown to be a powerful tool for manipulating the vibrational modes of elastic structures, with applications such as optical-mechanical mode coupling. Inspi…
Negative superfluid density and spatial instabilities in driven superconductors
Andrey Grankin, Victor Galitski, Vadim Oganesyan
We consider excitation of Higgs modes via the modulation of the BCS coupling within the Migdal-Eliashberg-Keldysh theory of time-dependent superconductivity. Despite the presence o…
Diagnosing electronic phases of matter using photonic correlation functions
Gautam Nambiar, Andrey Grankin, Mohammad Hafezi
In the past couple of decades, there have been significant advances in measuring quantum properties of light, such as quadratures of squeezed light and single-photon counting. Here…
Surface-mediated ultra-strong cavity coupling of two-dimensional itinerant electrons
Christian J. Eckhardt, Andrey Grankin, Dante M. Kennes +5
Engineering phases of matter in cavities requires effective light-matter coupling strengths that are on the same order of magnitude as the bare system energetics, coined the ultra-…
Enhanced Cooper Pairing via Random Matrix Phonons in Superconducting Grains
Andrey Grankin, Mohammad Hafezi, Victor Galitski
There is rich experimental evidence that granular superconductors and superconducting films often exhibit a higher transition temperature, , than that in bulk samples of the…
Collective optical properties of moiré excitons
Tsung-Sheng Huang, Yu-Xin Wang, Yan-Qi Wang +3
We propose that excitons in moiré transition metal dichalcogenide bilayers offer a promising platform for investigating collective radiative properties. While some of these optical…
Integrable-to-Thermalizing Crossover in Non-Equilibrium Superconductors
Andrey Grankin, Victor Galitski
Motivated by the experiment by M. Budden {\em et al.} [Nature Physics {\bf 17}, 611 (2021)], who observed signatures of long-lived photo-induced superconductivity, we develop an ac…
Extended Josephson junction qubit system
Andrey Grankin, Alicia J. Kollár, Mohammad Hafezi
Circuit quantum electrodynamics (QED) has emerged as a promising platform for implementing quantum computation and simulation. Typically, junctions in these systems are of a suffic…
Chiral Flat-Band Optical Cavity with Atomically Thin Mirrors
Daniel G. Suárez-Forero, Ruihao Ni, Supratik Sarkar +10
A fundamental requirement for photonic technologies is the ability to control the confinement and propagation of light. Widely utilized platforms include two-dimensional (2D) optic…
Circuit QED detection of induced two-fold anisotropic pairing in a hybrid superconductor-ferromagnet bilayer
C. G. L. Bøttcher, N. R. Poniatowski, A. Grankin +5
Hybrid systems represent one of the frontiers in the study of unconventional superconductivity and are a promising platform to realize topological superconducting states. Owing to…
Boson Sampling for Generalized Bosons
En-Jui Kuo, Yijia Xu, Dominik Hangleiter +2
We introduce the notion of "generalized bosons" whose exchange statistics resemble those of bosons, but the local bosonic commutator is replaced by an arbitra…
Dark Andreev States in Superconductors
Andrey Grankin, Victor Galitski
The conventional Bardeen-Cooper-Schrieffer (BCS) model of superconductivity assumes a frequency-independent order parameter, which allows a relatively simple description of the sup…
Interplay of hyperbolic plasmons and superconductivity
Andrey Grankin, Victor Galitski
Hyperbolic plasmons are collective electron excitations in layered conductors. They are of relevance to a number of superconducting materials, including the cuprates and layered hy…
Cavity magnon-polaritons in cuprate parent compounds
Jonathan B. Curtis, Andrey Grankin, Nicholas R. Poniatowski +3
Cavity control of quantum matter may offer new ways to study and manipulate many-body systems. A particularly appealing idea is to use cavities to enhance superconductivity, especi…
Enhancement of superconductivity with external phonon squeezing
Andrey Grankin, Mohammad Hafezi, Victor M. Galitski
Squeezing of phonons due to the non-linear coupling to electrons is a way to enhance superconductivity as theoretically studied in a recent work [Kennes et al. Nature Physics 13, 4…