Papers

András Grabarits, M. Kormos, I. Lovas +1 more·Jul 21, 2021

We present a universal theory of quantum work statistics in generic disordered non-interacting Fermi systems, displaying a chaotic single-particle spectrum captured by random matrix theory. We consider quantum quenches both within a driven random mat...

C. Leroux, A. Di Paolo, A. Blais·Jul 21, 2021

Tunable two-qubit couplers offer an avenue to mitigate errors in multiqubit superconducting quantum processors. However, most couplers operate in a narrow frequency band and target specific couplings, such as the spurious ZZ interaction. We introduce...

K. Delfanazari, O. Muskens·Jul 21, 2021

We introduce chip-integrated visible light communication-band modulators based on niobium (Nb) metallic plasmonic nano-antenna arrays. Our plasmonic nano-devices provide strong sensitivity to the polarization of the incident visible light and the geo...

A. Kirmani, Kieran Bull, Chang-Yu Hou +5 more·Jul 21, 2021

Intermediate-scale quantum technologies provide new opportunities for scientific discovery, yet they also pose the challenge of identifying suitable problems that can take advantage of such devices in spite of their present-day limitations. In solid-...

Rui Wang, C. Hernani-Morales, J. D. Mart'in-Guerrero +2 more·Jul 21, 2021

This paper proposes a machine learning method to characterize photonic states via a simple optical circuit and data processing of photon number distributions, such as photonic patterns. The input states consist of two coherent states used as referenc...

N J Berner, Vincent Fortuin, Jonas Landman·Jul 20, 2021

Quantum machine learning promises great speedups over classical algorithms, but it often requires repeated computations to achieve a desired level of accuracy for its point estimates. Bayesian learning focuses more on sampling from posterior distribu...

S. Takada, G. Georgiou, E. Arrighi +8 more·Jul 20, 2021

We study the interaction between two closely spaced but electrically isolated quasi-onedimensional electrical wires by a drag experiment. In this work we experimentally demonstrate the generation of current in an unbiased (drag) wire, which results f...

Trevor Vincent, L. O'Riordan, Mikhail Andrenkov +4 more·Jul 20, 2021

We introduce a new open-source software library Jet, which uses task-based parallelism to obtain speed-ups in classical tensor-network simulations of quantum circuits. These speed-ups result from i) the increased parallelism introduced by mapping the...

Sepehr Nezami, Jeongwan Haah·Jul 20, 2021

Triorthogonal codes are a class of quantum error correcting codes used in magic state distillation protocols. We classify all triorthogonal codes with $n+k \le 38$, where $n$ is the number of physical qubits and $k$ is the number of logical qubits of...

S. Ren, Wei Yan, Lantian Feng +10 more·Jul 20, 2021

Nonreciprocal photonic devices are essential components of classical optical information processing. It is interesting and important to investigate their feasibility in the quantum world. In this work, a single‐photon non‐reciprocal dynamical transmi...

R. Selvarajan, Vivek Dixit, X. Cui +2 more·Jul 19, 2021

The road to computing on quantum devices has been accelerated by the promises that come from using Shor’s algorithm to reduce the complexity of prime factorization. However, this promise hast not yet been realized due to noisy qubits and lack of robu...

Qinghong Yang, Dong E. Liu·Jul 19, 2021

We study the performance of quantum error correction codes(QECCs) under the detection-induced coherent error due to the imperfectness of practical implementations of stabilizer measurements, after running a quantum circuit. Considering the most promi...

Hrushikesh Pramod Patil, Yulun Wang, P. Krstic·Jul 19, 2021

Variational quantum algorithms have found success in the NISQ era owing to their hybrid quantum-classical approach which mitigate the problems of noise in quantum computers. In our study we introduce the dynamic ansatz in the Variational Quantum Line...

Paolo Braccia, L. Banchi, F. Caruso·Jul 19, 2021

Noisy-Intermediate-Scale-Quantum (NISQ) devices are nowadays starting to become available to the final user, hence potentially allowing to show the quantum speedups predicted by the quantum information theory. However, before implementing any quantum...

Alexander Zlokapa, H. Neven, S. Lloyd·Jul 19, 2021

Given the success of deep learning in classical machine learning, quantum algorithms for traditional neural network architectures may provide one of the most promising settings for quantum machine learning. Considering a fully-connected feedforward n...

N. Okuma, Yuya O. Nakagawa·Jul 18, 2021

The eigenspectrum of a non-normal matrix, which does not commute with its Hermitian conjugate, is a central issue of non-Hermitian physics that has been extensively studied in the past few years. There is, however, another characteristic of a non-nor...

Wenxuan Zhong, Y. Ke, Ye Wang +3 more·Jul 18, 2021

With the rapid development of quantum computers, quantum algorithms have been studied extensively. However, quantum algorithms tackling statistical problems are still lacking. In this paper, we propose a novel non-oracular quantum adaptive search (QA...

Peter Groszkowski, J. Koch·Jul 18, 2021

scqubits is an open-source Python package for simulating and analyzing superconducting circuits. It provides convenient routines to obtain energy spectra of common superconducting qubits, such as the transmon, fluxonium, flux, cos(2ϕ) and the 0-π qub...

Y. Gurevich, A. Blass·Jul 17, 2021

We define syntax and semantics of quantum circuits, allowing measurement gates and classical channels. We define circuit-based quantum algorithms and prove that, semantically, any such algorithm is equivalent to a single measurement that depends only...

W. Cui, Shilu Yan·Jul 17, 2021

To assess whether a gate-based quantum algorithm can be executed successfully on a noisy intermediate-scale quantum (NISQ) device, both complexity and actual value of quantum resources should be considered carefully. Based on quantum phase estimation...