Papers

M. A. Johnson, M. Ma̧dzik, F. Hudson +5 more·Oct 5, 2021

Fault-tolerant quantum computing requires initializing the quantum register in a well-defined fiducial state. In solid-state systems, this is typically achieved through thermalization to a cold reservoir, such that the initialization fidelity is fundame...

Zixuan Hu, S. Kais·Oct 5, 2021

We develop a systematic framework for characterizing all quantum circuits with qubit functional configurations. The qubit functional configuration is a mathematical structure that can classify the properties and behaviors of quantum circuits collecti...

K. Nilesh, P. Panigrahi·Oct 5, 2021

The advancement of quantum computers undermines the security of classical blockchain, necessitating either a post-quantum upgrade of the existing architecture or creation of an inherently quantum blockchain. Here we propose a practically realizable m...

Yusui Chen, Wenhao Hu, Xiang Li·Oct 5, 2021

Fully convolutional networks are robust in performing semantic segmentation, with many applications from signal processing to computer vision. From the fundamental principles of variational quantum algorithms, we propose a feasible pure quantum archi...

Qiao Li, J. Cui, Wei Li·Oct 5, 2021

Dynamical spin-structure factor (DSF) contains fingerprint information of collective excitations in interacting quantum spin systems. In solid state experiments, DSF can be measured through neutron scatterings. However, it is in general challenging t...

Shangnan Zhou·Oct 5, 2021

Quantum machine learning promises to efficiently solve important problems. There are two persistent challenges in classical machine learning: the lack of labeled data, and the limit of computational power. We propose a novel framework that resolves bot...

Marten Richter, S. Hughes·Oct 4, 2021

Multitime system correlation functions are relevant in various areas of physics and science, dealing with system-bath interaction including spectroscopy and quantum optics, where many of these schemes include an off-diagonal system bath interaction. ...

Changhun Oh, Youngrong Lim, Bill Fefferman +1 more·Oct 4, 2021

Boson sampling is a fundamentally and practically important task that can be used to demonstrate quantum supremacy using noisy intermediate-scale quantum devices. In this Letter, we present classical sampling algorithms for single-photon and Gaussian...

F. Malone, R. Parrish, Alicia R. Welden +6 more·Oct 4, 2021

We explore the use of symmetry-adapted perturbation theory (SAPT) as a simple and efficient means to compute interaction energies between large molecular systems with a hybrid method combining NISQ-era quantum and classical computers. From the one- a...

Francisco M. O. Brito, A. Ferreira·Oct 4, 2021

The proliferation of quantum fluctuations and long-range entanglement presents an outstanding challenge for the numerical simulation of interacting spin systems with exotic ground states. Here, we present a toolset of Chebyshev polynomial-based itera...

Marco Lewis, S. Soudjani, P. Zuliani·Oct 4, 2021

Over the past 27 years, quantum computing has seen a huge rise in interest from both academia and industry. At the current rate, quantum computers are growing in size rapidly backed up by the increase of research in the field. Significant efforts are...

Z. Zhan, Y. Fei, C. Run +8 more·Oct 3, 2021

A quantum eigensolver is designed under a multi-layer cluster mean-field (CMF) algorithm by partitioning a quantum system into spatially-separated clusters. For each cluster, a reduced Hamiltonian is obtained after a partial average over its environm...

J. Lam, Yi-Zhuang You·Oct 3, 2021

The Ryu-Takayanagi formula directly connects quantum entanglement and geometry. Yet the assumption of static geometry lead to an exponentially small mutual information between far-separated disjoint regions, which does not hold in many systems such a...

L. W. Anderson, M. Kiffner, P. Barkoutsos +3 more·Oct 3, 2021

Variational quantum algorithms (VQAs) are increasingly being applied in simulations of strongly-bound (covalently bonded) systems using full molecular orbital basis representations. The application of quantum computers to the weakly-bound intermolecu...

V. Ramesh, V. Natarajan, A. Prabhakar·Oct 3, 2021

We evaluate the performance of different algorithms in minimizing the Hamiltonian of a spatial-photonic Ising machine (SPIM). We then encode the number-partitioning problem on the SPIM and adiabatically arrive at good solutions for the problem for ov...

Michele Castriotta, E. Prati, G. Ferrari·Oct 1, 2021

We perform the characterization and modeling of a floatinggate device realized with a commercial 350-nm CMOS technology at cryogenic temperature. The programmability of the device offers a solution in the realization of a precise and flexible cryogen...

Sheng Ren, Ka-Wai Chen, Navid Ghadermarzy +3 more·Oct 1, 2021

We introduce a novel transpiler for the placement and routing of quantum circuits on arbitrary target hardware architectures. We use finite-horizon, and optionally discounted, reward functions to heuristically find a suitable placement and routing poli...

C. B. Pronin, A. Ostroukh·Oct 1, 2021

This paper highlights the possibility of creating quantum neural networks that are trained by Grover's Search Algorithm. The purpose of this work is to propose the concept of combining the training process of a neural network, which is performed on t...

J. Teske, H. Bluhm·Oct 1, 2021

Realistic modelling of qubit systems including noise and constraints imposed by control hardware is required for performance prediction and control optimization of quantum processors. We introduce qopt, a software framework for simulating qubit dynam...

L. Stefanazzi, K. Treptow, N. Wilcer +14 more·Oct 1, 2021

We introduce a Xilinx RF System-on-Chip (RFSoC)-based qubit controller (called the Quantum Instrumentation Control Kit, or QICK for short), which supports the direct synthesis of control pulses with carrier frequencies of up to 6 GHz. The QICK can co...