Papers

Jordan S. Cotler, Xizhi Han, X. Qi +1 more·Nov 13, 2018

A bstractWe introduce a framework to study the emergence of time and causal structure in quantum many-body systems. In doing so, we consider quantum states which encode spacetime dynamics, and develop information theoretic tools to extract the causal...

C. Akers, Pratik Rath·Nov 13, 2018

We study Renyi entropies Sn in quantum error correcting codes and compare the answer to the cosmic brane prescription for computing S˜n≡n2∂nn−1nSn\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackag...

M. Kang, David K. Kolchmeyer·Nov 13, 2018

We reformulate entanglement wedge reconstruction in the language of operator-algebra quantum error correction with infinite-dimensional physical and code Hilbert spaces. Von Neumann algebras are used to characterize observables in a boundary subregio...

Yipeng Huang, M. Martonosi·Nov 13, 2018

With the advent of small-scale prototype quantum computers, researchers can now code and run quantum algorithms that were previously proposed but not fully implemented. In support of this growing interest in quantum computing experimentation, program...

S. Scopa, G. Landi, Adam Hammoumi +1 more·Nov 13, 2018

Time-dependent Lindblad master equations have important applications in areas ranging from quantum thermodynamics to dissipative quantum computing. In this paper we outline a general method for writing down exact solutions of time-dependent Lindblad ...

Yosi Atia, Yonathan Oren, N. Katz·Nov 12, 2018

Quantum computation by the adiabatic theorem requires a slowly-varying Hamiltonian with respect to the spectral gap. We show that the Landau–Zener–Stückelberg oscillation phenomenon, which naturally occurs in quantum two-level systems under non-adiab...

Nai-Hui Chia, Han-Hsuan Lin, C. Wang·Nov 12, 2018

We present classical sublinear-time algorithms for solving low-rank linear systems of equations. Our algorithms are inspired by the HHL quantum algorithm for solving linear systems and the recent breakthrough by Tang of dequantizing the quantum algor...

M. Rossi, M. Cattaneo, M. Paris +1 more·Nov 12, 2018

Abstract Continuous-time quantum walks may be exploited to enhance spatial search, i.e., for finding a marked element in a database structured as a complex network. However, in practical implementations, the environmental noise has detrimental effect...

Junkai Zeng, C. Yang, A. Dzurak +1 more·Nov 12, 2018

Implementing high-fidelity quantum control and reducing the effect of the coupling between a quantum system and its environment is a major challenge in developing quantum information technologies. Here, we show that there exists a geometrical structu...

V. Bergholm, J. Izaac, M. Schuld +65 more·Nov 12, 2018

PennyLane is a Python 3 software framework for differentiable programming of quantum computers. The library provides a unified architecture for near-term quantum computing devices, supporting both qubit and continuous-variable paradigms. PennyLane's ...

D. Tsurikov, A. Yafyasov·Nov 11, 2018

Searching of optimal parameters of nanoelectronic devices is a primal problem in their modeling. We solve this problem on example of the electron ballistic switch in quantum network model. For this purpose, we use a computing scheme in which closed c...

Jan-Michael Reiner, F. Wilhelm-Mauch, G. Schön +1 more·Nov 11, 2018

A key goal of digital quantum computing is the simulation of fermionic systems such as molecules or the Hubbard model. Unfortunately, for present and near-future quantum computers the use of quantum error correction schemes is still out of reach. Hen...

M. Kibler·Nov 9, 2018

The aim of the present paper is twofold. First, to give the main ideas behind quantum computingand quantum information, a field based on quantum-mechanical phenomena. Therefore, a shortreview is devoted to (i) quantum bits or qubits (and more general...

P. Rebentrost, S. Lloyd·Nov 9, 2018

We present a quantum algorithm for portfolio optimization. We discuss the market data input of asset prices, the processing of such data via quantum operations, and the output of financially relevant results. Given quantum access to a historical reco...

D. Hackett, K. Howe, Ciaran Hughes +3 more·Nov 8, 2018

In the near-future noisy intermediate-scale quantum (NISQ) era of quantum computing technology, applications of quantum computing will be limited to calculations of very modest scales in terms of the number of qubits used. The need to represent numer...

S. Hung, Kesha Hietala, Shaopeng Zhu +3 more·Nov 8, 2018

Quantum computation is a topic of significant recent interest, with practical advances coming from both research and industry. A major challenge in quantum programming is dealing with errors (quantum noise) during execution. Because quantum resources...

V. Zemlyanov, N. Kirsanov, M. Perelshtein +5 more·Nov 8, 2018

The linear optics holds high promise as a platform for implementing quantum algorithms. Here we present an all-optical experimental realization of the Fourier transformation-based phase estimation algorithm having a wealth of applications in quantum ...

Tyson Jones, S. Benjamin·Nov 7, 2018

We explore a method for automatically recompiling a quantum circuit A into a target circuit B, with the goal that both circuits have the same action on a specific input i.e. B∣in⟩=A∣in⟩. This is of particular relevance to hybrid, NISQ-era algorithms ...

Jeffrey Marshall, L. Venuti, P. Zanardi·Nov 7, 2018

We investigate a general class of dissipative quantum circuit capable of computing arbitrary Conjunctive Normal Form (CNF) Boolean formulas. In particular, the clauses in a CNF formula define a local generator of Markovian quantum dynamics which acts...

M. Huo, Ying Li·Nov 7, 2018

The error model of a noisy quantum computer is important for optimizing the quantum error correction protocol, and a highly accurate error model is vital to high-fidelity quantum computation on intermediate-scale quantum devices. The way to minimize ...