5.3k citations · 25.9k across the 91 of their papers we have counts for
87 papers · 1 filter
Quantification of Entanglement and Coherence with Purity Detection
Ting Zhang, Graeme Smith, John A. Smolin +7
Entanglement and coherence are fundamental properties of quantum systems, promising to power near future quantum technologies, such as quantum computation, quantum communication an…
Optimal one-shot entanglement sharing
Vikesh Siddhu, John Smolin
Sharing entanglement across quantum interconnects is fundamental for quantum information processing. We discuss a practical setting where this interconnect, modeled by a quantum ch…
The platypus of the quantum channel zoo
Felix Leditzky, Debbie Leung, Vikesh Siddhu +2
Understanding quantum channels and the strange behavior of their capacities is a key objective of quantum information theory. Here we study a remarkably simple, low-dimensional, si…
Generic nonadditivity of quantum capacity in simple channels
Felix Leditzky, Debbie Leung, Vikesh Siddhu +2
Determining capacities of quantum channels is a fundamental question in quantum information theory. Despite having rigorous coding theorems quantifying the flow of information acro…
Active Learning of Quantum System Hamiltonians yields Query Advantage
Arkopal Dutt, Edwin Pednault, Chai Wah Wu +4
Hamiltonian learning is an important procedure in quantum system identification, calibration, and successful operation of quantum computers. Through queries to the quantum system,…
Hardware-efficient random circuits to classify noise in a multi-qubit system
Jin-Sung Kim, Lev S. Bishop, Antonio D. Corcoles +3
In this work we extend a multi-qubit benchmarking technique known as the Binned Output Generation (BOG) in order to discriminate between coherent and incoherent noise sources in th…
OpenQASM 3: A broader and deeper quantum assembly language
Andrew W. Cross, Ali Javadi-Abhari, Thomas Alexander +8
Quantum assembly languages are machine-independent languages that traditionally describe quantum computation in the circuit model. Open quantum assembly language (OpenQASM 2) was p…
Private learning implies quantum stability
Srinivasan Arunachalam, Yihui Quek, John Smolin
Learning an unknown -qubit quantum state is a fundamental challenge in quantum computing. Information-theoretically, it is known that tomography requires exponential in …
Denoising quantum states with Quantum Autoencoders -- Theory and Applications
Tom Achache, Lior Horesh, John Smolin
We implement a Quantum Autoencoder (QAE) as a quantum circuit capable of correcting Greenberger-Horne-Zeilinger (GHZ) states subject to various noisy quantum channels : the bit-fli…
Laser-annealing Josephson junctions for yielding scaled-up superconducting quantum processors
Jared B. Hertzberg, Eric J. Zhang, Sami Rosenblatt +8
As superconducting quantum circuits scale to larger sizes, the problem of frequency crowding proves a formidable task. Here we present a solution for this problem in fixed-frequenc…
A compressed classical description of quantum states
David Gosset, John Smolin
We show how to approximately represent a quantum state using the square root of the usual amount of classical memory. The classical representation of an -qubit state consist…
Three Qubit Randomized Benchmarking
David C. McKay, Sarah Sheldon, John A. Smolin +2
As quantum circuits increase in size, it is critical to establish scalable multiqubit fidelity metrics. Here we investigate three-qubit randomized benchmarking (RB) with fixed-freq…
Quantum optimization using variational algorithms on near-term quantum devices
Nikolaj Moll, Panagiotis Barkoutsos, Lev S. Bishop +15
Universal fault-tolerant quantum computers will require error-free execution of long sequences of quantum gate operations, which is expected to involve millions of physical qubits.…
Quantifying Coherence and Entanglement via Simple Measurements
Graeme Smith, John A. Smolin, Xiao Yuan +3
Coherence and entanglement are fundamental properties of quantum systems, promising to power the near future quantum computers, sensors and simulators. Yet, their experimental dete…
Open Quantum Assembly Language
Andrew W. Cross, Lev S. Bishop, John A. Smolin +1
This document describes a quantum assembly language (QASM) called OpenQASM that is used to implement experiments with low depth quantum circuits. OpenQASM represents universal phys…
Demonstration of quantum advantage in machine learning
D. Ristè, Marcus P. da Silva, Colm A. Ryan +5
The main promise of quantum computing is to efficiently solve certain problems that are prohibitively expensive for a classical computer. Most problems with a proven quantum advant…
Scalable randomized benchmarking of non-Clifford gates
Andrew W. Cross, Easwar Magesan, Lev S. Bishop +2
Randomized benchmarking is a widely used experimental technique to characterize the average error of quantum operations. Benchmarking procedures that scale to enable characterizati…
Trading classical and quantum computational resources
Sergey Bravyi, Graeme Smith, John Smolin
We propose examples of a hybrid quantum-classical simulation where a classical computer assisted by a small quantum processor can efficiently simulate a larger quantum system. Firs…
Quantum learning robust to noise
Andrew W. Cross, Graeme Smith, John A. Smolin
Noise is often regarded as anathema to quantum computation, but in some settings it can be an unlikely ally. We consider the problem of learning the class of -bit parity functio…
How to efficiently select an arbitrary Clifford group element
Robert Koenig, John A. Smolin
We give an algorithm which produces a unique element of the Clifford group on qubits from an integer (the number of elements in the g…
Comment on "Distinguishing Classical and Quantum Models for the D-Wave Device"
Seung Woo Shin, Graeme Smith, John A. Smolin +1
The SSSV model is a simple classical model that achieves excellent correlation with published experimental data on the D-Wave machine's behavior on random instances of its native p…
How "Quantum" is the D-Wave Machine?
Seung Woo Shin, Graeme Smith, John A. Smolin +1
Recently there has been intense interest in claims about the performance of the D-Wave machine. In this paper, we outline a simple classical model, and show that it achieves excell…
Maximal Privacy Without Coherence
Debbie Leung, Ke Li, Graeme Smith +1
Privacy lies at the fundament of quantum mechanics. A coherently transmitted quantum state is inherently private. Remarkably, coherent quantum communication is not a prerequisite f…
Implementing a strand of a scalable fault-tolerant quantum computing fabric
Jerry M. Chow, Jay M. Gambetta, Easwar Magesan +7
Quantum error correction (QEC) is an essential step towards realising scalable quantum computers. Theoretically, it is possible to achieve arbitrarily long protection of quantum in…