activity
20162026
most citedComplexity Classification of Product State Problems for Local Hamiltonians

1 citations · 1 across the 9 of their papers we have counts for

collaborators

14 papers

quant-ph2026

Characterizing Quantum Advantage for Generalizations of the Boolean Hidden Matching Problem

Mark Bun, Joao F. Doriguello, John Kallaugher +1

We study the one-way communication complexity of the -Boolean Hidden Partition problem. Here, Alice is given an -bit string and Bob is given disjoint blocks of its ind…

quant-ph2026

Learning Gaussian optical states with quantum computers

Spencer Dimitroff, John Kallaugher, Ashe Miller +1

Recent results have established dramatic advantages in learning properties of quantum states when a quantum computer is available to process or jointly measure multiple copies of t…

quant-ph2025

Hamiltonian Locality Testing via Trotterized Postselection

John Kallaugher, Daniel Liang

The (tolerant) Hamiltonian locality testing problem, introduced in [Bluhm, Caro,Oufkir `24], is to determine whether a Hamiltonian is -close to being -local (…

quant-ph2024

How to Design a Quantum Streaming Algorithm Without Knowing Anything About Quantum Computing

John Kallaugher, Ojas Parekh, Nadezhda Voronova

A series of work [GKK+08, Kal22, KPV24] has shown that asymptotic advantages in space complexity are possible for quantum algorithms over their classical counterparts in the stream…

quant-ph2024★ 1 cited

Complexity Classification of Product State Problems for Local Hamiltonians

John Kallaugher, Ojas Parekh, Kevin Thompson +2

Product states, unentangled tensor products of single qubits, are a ubiquitous ansatz in quantum computation, including for state-of-the-art Hamiltonian approximation algorithms. A…

quant-ph2023

Exponential Quantum Space Advantage for Approximating Maximum Directed Cut in the Streaming Model

John Kallaugher, Ojas Parekh, Nadezhda Voronova

While the search for quantum advantage typically focuses on speedups in execution time, quantum algorithms also offer the potential for advantage in space complexity. Previous work…

quant-ph2022

The Quantum and Classical Streaming Complexity of Quantum and Classical Max-Cut

John Kallaugher, Ojas Parekh

We investigate the space complexity of two graph streaming problems: Max-Cut and its quantum analogue, Quantum Max-Cut. Previous work by Kapralov and Krachun [STOC `19] resolved th…

cs.DS2021

Simulating Random Walks in Random Streams

John Kallaugher, Michael Kapralov, Eric Price

The random order graph streaming model has received significant attention recently, with problems such as matching size estimation, component counting, and the evaluation of bounde…

cs.DS2021

Factorial Lower Bounds for (Almost) Random Order Streams

Ashish Chiplunkar, John Kallaugher, Michael Kapralov +1

In this paper we introduce and study the \textsc{StreamingCycles} problem, a random order streaming version of the Boolean Hidden Hypermatching problem that has been instrumental i…

quant-ph2021

A Quantum Advantage for a Natural Streaming Problem

John Kallaugher

Data streaming, in which a large dataset is received as a "stream" of updates, is an important model in the study of space-bounded computation. Starting with the work of Le Gall [S…

cs.DS2021

An Optimal Algorithm for Triangle Counting in the Stream

Rajesh Jayaram, John Kallaugher

We present a new algorithm for approximating the number of triangles in a graph whose edges arrive as an arbitrary order stream. If is the number of edges in , the n…

cs.DS2019

Separations and Equivalences between Turnstile Streaming and Linear Sketching

John Kallaugher, Eric Price

A longstanding observation, which was partially proven in \cite{LNW14,AHLW16}, is that any turnstile streaming algorithm can be implemented as a linear sketch (the reverse is trivi…

cs.DS2018

The Sketching Complexity of Graph and Hypergraph Counting

John Kallaugher, Michael Kapralov, Eric Price

Subgraph counting is a fundamental primitive in graph processing, with applications in social network analysis (e.g., estimating the clustering coefficient of a graph), database pr…

cs.DS2016

A Hybrid Sampling Scheme for Triangle Counting

John Kallaugher, Eric Price

We study the problem of estimating the number of triangles in a graph stream. No streaming algorithm can get sublinear space on all graphs, so methods in this area bound the space…