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Publications

Quantum Many-Body Physics Calculations with Large Language Models

Cornell Affiliated Author(s)
Author
Haining Pan
Nayantara Mudur
Will Taranto
Maria Tikhanovskaya
Subhashini Venugopalan
Yasaman Bahri
Michael Brenner
Eun-Ah Kim
Abstract

Large language models (LLMs) have demonstrated an unprecedented ability to perform complex tasks in multiple domains, including mathematical and scientific reasoning. We demonstrate that with carefully designed prompts, LLMs can accurately carry out key calculations in research papers in theoretical physics. We focus on a broadly used approximation method in quantum physics: the Hartree-Fock method, requiring an analytic multi-step calculation deriving approximate Hamiltonian and corresponding self-consistency equations.

Journal
arXiv e-prints
Date Published
Group (Lab)

Machine learning reveals features of spinon Fermi surface

Cornell Affiliated Author(s)
Author
Kevin Zhang
Shi Feng
Yuri Lensky
Nandini Trivedi
Eun-Ah Kim
Abstract

With rapid progress in simulation of strongly interacting quantum Hamiltonians, the challenge in characterizing unknown phases becomes a bottleneck for scientific progress. We demonstrate that a Quantum-Classical hybrid approach (QuCl) of mining sampled projective snapshots with interpretable classical machine learning can unveil signatures of seemingly featureless quantum states.

Journal
communications physics
Date Published
Funding Source
EAGER OSP-136036
PGS-D-557580-2021
GBMF10436
OAC-2118310
EAGER OSP-136036
Ewha Frontier 10-10 Research Grant
920665
DMR-2011876
NSF-DMR 2138905
Group (Lab)

Bragg glass signatures in PdxErTe3 with X-ray diffraction temperature clustering

Cornell Affiliated Author(s)
Author
Krishnanand Mallayya
Joshua Straquadine
Matthew Krogstad
Maja Bachmann
Anisha Singh
Raymond Osborn
Stephan Rosenkranz
Ian Fisher
Eun-Ah Kim
Abstract

The Bragg glass phase is a nearly perfect crystal with glassy features predicted to occur in vortex lattices and charge-density-wave systems in the presence of disorder. Detecting it has been challenging, despite its sharp theoretical definition in terms of diverging correlation lengths. Here we present bulk probe evidence supporting a Bragg glass phase in the systematically disordered charge-density-wave material of PdxErTe3. We do this by using comprehensive X-ray data and a machine-learning-based analysis tool called X-ray diffraction temperature clustering (X-TEC).

Journal
Nature Physics
Date Published
Funding Source
DE-SC0018946
GBMF10436
DE-AC02-76SF00515
Group (Lab)

High-throughput ab initio design of atomic interfaces using InterMatch

Cornell Affiliated Author(s)
Author
E. Gerber
S.B. Torrisi
S. Shabani
E. Seewald
J. Pack
J.E. Hoffman
C.R. Dean
A.N. Pasupathy
E.-A. Kim
Abstract

Forming a hetero-interface is a materials-design strategy that can access an astronomically large phase space. However, the immense phase space necessitates a high-throughput approach for an optimal interface design. Here we introduce a high-throughput computational framework, InterMatch, for efficiently predicting charge transfer, strain, and superlattice structure of an interface by leveraging the databases of individual bulk materials.

Journal
Nature Communications
Date Published
Group (Lab)

Realizing a tunable honeycomb lattice in ABBA-stacked twisted double bilayer WSe2

Cornell Affiliated Author(s)
Author
Haining Pan
Eun-Ah Kim
Chao-Ming Jian
Abstract

The ideal honeycomb lattice, featuring sublattice and SU(2) spin rotation symmetries, is a fundamental model for investigating quantum matters with topology and correlations. With the rise of the moiré-based design of model systems, realizing a tunable and symmetric honeycomb lattice system with a narrow bandwidth can open access to new phases and insights. We propose the ABBA-stacked twisted double bilayer WSe2 as a realistic and tunable platform for reaching this goal.

Journal
Physical Review Research
Date Published
Group (Lab)
Chao-Ming Jian Group

Realizing a tunable honeycomb lattice in ABBA-stacked twisted double bilayer WSe2

Cornell Affiliated Author(s)
Author
H. Pan
E.-A. Kim
C.-M. Jian
Abstract

The ideal honeycomb lattice, featuring sublattice and SU(2) spin rotation symmetries, is a fundamental model for investigating quantum matter with topology and correlations. With the rise of the moiré-based design of model systems, realizing a tunable and symmetric honeycomb lattice system with a narrow bandwidth can open access to new phases and insights. We propose the ABBA-stacked twisted double bilayer WSe2 as a realistic and tunable platform for reaching this goal. Adjusting the twist angle allows the bandwidth and the ratio between hopping parameters of different ranges to be tuned.

Journal
Physical Review Research
Date Published
Group (Lab)
Chao-Ming Jian Group

Frustrated charge order and cooperative distortions in ScV6 Sn6

Cornell Affiliated Author(s)
Author
G. Pokharel
B.R. Ortiz
L. Kautzsch
S.J. Gomez
K. Mallayya
G. Wu
E.-A. Kim
J.P.C. Ruff
S. Sarker
S.D. Wilson
Abstract

Here we study the stability of charge order in the kagome metal ScV6Sn6. Synchrotron x-ray diffraction measurements reveal high-temperature, short-range charge correlations at the wave vectors along q=(13,13,12) whose interlayer correlation lengths diverge upon cooling. At the charge order transition, this divergence is interrupted, and long-range order freezes in along q=(13,13,13), as previously reported, while disorder enables the charge correlations to persist at the q=(13,13,12) wave vector down to the lowest temperatures measured.

Journal
Physical Review Materials
Date Published
Group (Lab)

Fractionalization in Fractional Correlated Insulating States at n±1/3 Filled Twisted Bilayer Graphene

Cornell Affiliated Author(s)
Author
D. Mao
K. Zhang
E.-A. Kim
Abstract

Fractionalization without time-reversal symmetry breaking is a long-sought-after goal in the study of correlated phenomena. The earlier proposal of correlated insulating states at n±1/3 filling in twisted bilayer graphene and recent experimental observations of insulating states at those fillings strongly suggest that moiré graphene systems provide a new platform to realize time-reversal symmetric fractionalized states. However, the nature of fractional excitations and the effect of quantum fluctuation on the fractional correlated insulating states are unknown.

Journal
Physical Review Letters
Date Published
Group (Lab)

Non-Abelian braiding of graph vertices in a superconducting processor

Cornell Affiliated Author(s)
Author
T.I. Andersen
Y.D. Lensky
K. Kechedzhi
I.K. Drozdov
A. Bengtsson
S. Hong
A. Morvan
X. Mi
A. Opremcak
R. Acharya
R. Allen
M. Ansmann
F. Arute
K. Arya
A. Asfaw
J. Atalaya
R. Babbush
D. Bacon
J.C. Bardin
G. Bortoli
A. Bourassa
J. Bovaird
L. Brill
M. Broughton
B.B. Buckley
D.A. Buell
T. Burger
B. Burkett
N. Bushnell
Z. Chen
B. Chiaro
D. Chik
C. Chou
J. Cogan
R. Collins
P. Conner
W. Courtney
A.L. Crook
B. Curtin
D.M. Debroy
Del Barba
S. Demura
A. Dunsworth
D. Eppens
C. Erickson
L. Faoro
E. Farhi
R. Fatemi
V.S. Ferreira
L.F. Burgos
E. Forati
A.G. Fowler
B. Foxen
W. Giang
C. Gidney
D. Gilboa
M. Giustina
R. Gosula
A.G. Dau
J.A. Gross
S. Habegger
M.C. Hamilton
M. Hansen
M.P. Harrigan
S.D. Harrington
P. Heu
J. Hilton
M.R. Hoffmann
T. Huang
A. Huff
W.J. Huggins
L.B. Ioffe
S.V. Isakov
J. Iveland
E. Jeffrey
Z. Jiang
C. Jones
P. Juhas
D. Kafri
T. Khattar
M. Khezri
M. Kieferová
S. Kim
A. Kitaev
P.V. Klimov
A.R. Klots
A.N. Korotkov
F. Kostritsa
J.M. Kreikebaum
D. Landhuis
P. Laptev
K.-M. Lau
L. Laws
J. Lee
K.W. Lee
B.J. Lester
A.T. Lill
W. Liu
A. Locharla
E. Lucero
F.D. Malone
O. Martin
J.R. McClean
T. McCourt
M. McEwen
K.C. Miao
A. Mieszala
M. Mohseni
S. Montazeri
E. Mount
R. Movassagh
W. Mruczkiewicz
O. Naaman
M. Neeley
C. Neill
A. Nersisyan
M. Newman
J.H. Ng
A. Nguyen
M. Nguyen
M.Y. Niu
T.E. O’Brien
S. Omonije
A. Petukhov
R. Potter
L.P. Pryadko
C. Quintana
C. Rocque
N.C. Rubin
N. Saei
D. Sank
K. Sankaragomathi
K.J. Satzinger
H.F. Schurkus
C. Schuster
M.J. Shearn
A. Shorter
N. Shutty
V. Shvarts
J. Skruzny
W.C. Smith
R. Somma
G. Sterling
D. Strain
M. Szalay
A. Torres
G. Vidal
B. Villalonga
C.V. Heidweiller
T. White
B.W.K. Woo
C. Xing
Z.J. Yao
P. Yeh
J. Yoo
G. Young
A. Zalcman
Y. Zhang
N. Zhu
N. Zobrist
H. Neven
S. Boixo
A. Megrant
J. Kelly
Y. Chen
V. Smelyanskiy
E.-A. Kim
I. Aleiner
P. Roushan
Google Collaborators
Abstract

Indistinguishability of particles is a fundamental principle of quantum mechanics1. For all elementary and quasiparticles observed to date—including fermions, bosons and Abelian anyons—this principle guarantees that the braiding of identical particles leaves the system unchanged2,3. However, in two spatial dimensions, an intriguing possibility exists: braiding of non-Abelian anyons causes rotations in a space of topologically degenerate wavefunctions4–8. Hence, it can change the observables of the system without violating the principle of indistinguishability.

Journal
Nature
Date Published
Group (Lab)

Graph gauge theory of mobile non-Abelian anyons in a qubit stabilizer code

Cornell Affiliated Author(s)
Author
Y.D. Lensky
K. Kechedzhi
I. Aleiner
Eun-Ah Kim
Abstract

Stabilizer codes allow for non-local encoding and processing of quantum information. Deformations of stabilizer surface codes introduce new and non-trivial geometry, in particular leading to emergence of long sought after objects known as projective Ising non-Abelian anyons. Braiding of such anyons is a key ingredient of topological quantum computation. We suggest a simple and systematic approach to construct effective unitary protocols for braiding, manipulation and readout of non-Abelian anyons and preparation of their entangled states.

Journal
Annals of Physics
Date Published
Funding Source
920665
OAC-2118310
PHY-160761
Group (Lab)