Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
31,611
This Month
65
Today
0
Research Volume
15,686 papers in 12 months (-39% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Entanglement-based tensor-network strong-disorder renormalization group
Kouichi Seki, T. Hikihara, K. Okunishi·Jul 4, 2021
We propose an entanglement-based algorithm of the tensor-network strong-disorder renormalization group (tSDRG) method for quantum spin systems with quenched randomness. In contrast to the previous tSDRG algorithm based on the energy spectrum of renor...
Quantum Error Mitigation Relying on Permutation Filtering
Yifeng Xiong, S. Ng, L. Hanzo·Jul 3, 2021
Quantum error mitigation (QEM) is a class of promising techniques capable of reducing the computational error of variational quantum algorithms tailored for current noisy intermediate-scale quantum computers. The recently proposed permutation-based m...
Quantum imaginary-time evolution algorithm for quantum field theories with continuous variables
Kubra Yeter-Aydeniz, Eleftherios Moschandreou, G. Siopsis·Jul 2, 2021
We calculate the energy levels and corresponding eigenstates of an interacting scalar quantum field theory on a lattice using a continuous-variable version of the quantum imaginary time evolution algorithm. Only a single qumode is needed for the simu...
Quantum Multiple-Valued Decision Diagrams in Graphical Calculi
R. Vilmart·Jul 2, 2021
Graphical calculi such as the ZH-calculus are powerful tools in the study and analysis of quantum processes, with links to other models of quantum computation such as quantum circuits, measurement-based computing, etc. A somewhat compact but systemat...
Large-scale and High-speed Privacy Amplification for FPGA-based Quantum Key Distribution
Bingze Yan, Li Qiong, Haokun Mao·Jul 2, 2021
The FPGA-based Quantum key distribution (QKD) system is an important trend of QKD systems. It has several advantages, real time, low power consumption and high integration density. Privacy amplification is an essential part in a QKD system to ensure ...
Projected Least-Squares Quantum Process Tomography
Trystan Surawy-Stepney, J. Kahn, R. Kueng +1 more·Jul 2, 2021
We propose and investigate a new method of quantum process tomography (QPT) which we call projected least squares (PLS). In short, PLS consists of first computing the least-squares estimator of the Choi matrix of an unknown channel, and subsequently ...
Qubit-Based Clock Synchronization for QKD Systems Using a Bayesian Approach
Roderick D. Cochran, D. Gauthier·Jul 2, 2021
Quantum key distribution (QKD) systems provide a method for two users to exchange a provably secure key. Synchronizing the users’ clocks is an essential step before a secure key can be distilled. Qubit-based synchronization protocols directly use the...
Reduced quantum circuits for stabilizer states and graph states
Marc Bataille·Jul 2, 2021
We start by studying the subgroup structures underlying stabilizer circuits and we use our results to propose a new normal form for stabilizer circuits. This normal form is computed by induction using simple conjugation rules in the Clifford group. I...
Non-Parametric Semi-Supervised Learning in Many-Body Hilbert Space with Rescaled Logarithmic Fidelity
Wei-Ming Li, Shi-Ju Ran·Jul 1, 2021
In quantum and quantum-inspired machine learning, a key step is to embed the data in the quantum space known as Hilbert space. Studying quantum kernel function, which defines the distances among the samples in the Hilbert space, belongs to the fundam...
Quantum logic with spin qubits crossing the surface code threshold
X. Xue, M. Russ, N. Samkharadze +4 more·Jul 1, 2021
High-fidelity control of quantum bits is paramount for the reliable execution of quantum algorithms and for achieving fault tolerance—the ability to correct errors faster than they occur1. The central requirement for fault tolerance is expressed in t...
On-Demand Storage and Retrieval of Microwave Photons Using a Superconducting Multiresonator Quantum Memory.
Zenghui Bao, Zhiling Wang, Yukai Wu +5 more·Jul 1, 2021
We realize on-demand storage and retrieval of weak coherent microwave photon pulses at the single-photon level. A superconducting multiresonator system which is composed of a set of frequency-tunable coplanar waveguide resonators is implemented as th...
Implementation of a quantum algorithm to estimate the energy of a particle in a finite square well potential on IBM quantum computer
Sina Shokri, Shahnoosh Rafibakhsh, Roghayeh Pooshgan +1 more·Jul 1, 2021
In this paper, we implement a quantum algorithm—on IBM quantum devices, IBM QASM simulator and PPRC computer cluster—to find the energy values of the ground state and the first excited state of a particle in a finite square-well potential. We use the...
Computing molecular excited states on a D-Wave quantum annealer
A. Teplukhin, B. Kendrick, S. Mniszewski +6 more·Jul 1, 2021
The possibility of using quantum computers for electronic structure calculations has opened up a promising avenue for computational chemistry. Towards this direction, numerous algorithmic advances have been made in the last five years. The potential ...
String Comparison on a Quantum Computer Using Hamming Distance
Mushahid Khan, A. Miranskyy·Jun 30, 2021
The Hamming distance is ubiquitous in computing. Its computation gets expensive when one needs to compare a string against many strings. Quantum computers (QCs) may speed up the comparison. In this paper, we extend an existing algorithm for computing...
Complexity of Supersymmetric Systems and the Cohomology Problem
Chris Cade, P. M. Crichigno·Jun 30, 2021
We consider the complexity of the local Hamiltonian problem in the context of fermionic Hamiltonians with N=2 supersymmetry and show that the problem remains QMA-complete. Our main motivation for studying this is the well-known fact that the ground s...
QuantumSkynet: A High-Dimensional Quantum Computing Simulator
Andres Giraldo-Carvajal, Daniel A. Duque-Ramirez, J. Jaramillo-Villegas·Jun 30, 2021
The use of classical computers to simulate quantum computing has been successful in aiding the study of quantum algorithms and circuits that are too complex to examine analytically. Current implementations of quantum computing simulators are limited ...
Quantum simulation of operator spreading in the chaotic Ising model.
M. Geller, A. Arrasmith, Zoe Holmes +3 more·Jun 30, 2021
There is great interest in using near-term quantum computers to simulate and study foundational problems in quantum mechanics and quantum information science, such as the scrambling measured by an out-of-time-ordered correlator (OTOC). Here we use an...
Unbiasing fermionic quantum Monte Carlo with a quantum computer
W. Huggins, B. O’Gorman, N. Rubin +3 more·Jun 30, 2021
Interacting many-electron problems pose some of the greatest computational challenges in science, with essential applications across many fields. The solutions to these problems will offer accurate predictions of chemical reactivity and kinetics, and...
Variational secure cloud quantum computing
Yuta Shingu, Yuki Takeuchi, Suguru Endo +5 more·Jun 30, 2021
Variational quantum algorithms (VQAs) have been considered to be useful applications of noisy intermediate-scale quantum (NISQ) devices. Typically, in the VQAs, a parametrized ansatz circuit is used to generate a trial wave function, and the paramete...
Predicting quantum dynamical cost landscapes with deep learning
Mogens Dalgaard, F. Motzoi, J. Sherson·Jun 30, 2021
State-of-the-art quantum algorithms routinely tune dynamically parametrized cost functionals for combinatorics, machine learning, equation-solving, or energy minimization. However, large search complexity often demands many (noisy) quantum measuremen...