Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,563 papers in 12 months (-18% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Accelerating Quantum Computations of Chemistry Through Regularized Compressed Double Factorization
O. Oumarou, Maximilian Scheurer, R. Parrish +2 more·Dec 15, 2022
We propose the regularized compressed double factorization (RC-DF) method to classically compute compressed representations of molecular Hamiltonians that enable efficient simulation with noisy intermediate scale (NISQ) and error corrected quantum al...
Riemannian quantum circuit optimization for Hamiltonian simulation
Ayse Kotil, R. Banerjee, Qunsheng Huang +1 more·Dec 15, 2022
Hamiltonian simulation, i.e. simulating the real time evolution of a target quantum system, is a natural application of quantum computing. Trotter-Suzuki splitting methods can generate corresponding quantum circuits; however, a faithful approximation...
Time-dependent Rabi frequencies to protect quantum operations on an atomic qutrit by continuous dynamical decoupling
Adonai Hilário da Silva, R. Napolitano, F. Fanchini +1 more·Dec 14, 2022
We investigate the form required for the time-dependent Rabi frequencies involved in a procedure capable to protect the action of quantum gates on an atomic qutrit by means of external fields continuously decoupling the system from the environmental ...
Classical simulators as quantum error mitigators via circuit cutting
Ji Liu, Alvin Gonzales, Zain Saleem·Dec 14, 2022
We introduce an error mitigation framework that mitigates errors in a quantum circuit using circuit cutting. Our framework can be implemented in polynomial time for a wide variety of quantum circuits. Our technique involves cutting the circuit in suc...
High-Threshold Quantum Computing by Fusing One-Dimensional Cluster States.
S. Paesani, Benjamin J. Brown·Dec 13, 2022
We propose a measurement-based model for fault-tolerant quantum computation that can be realized with one-dimensional cluster states and fusion measurements only; basic resources that are readily available with scalable photonic hardware. Our simulat...
Importance sampling for stochastic quantum simulations
Oriel Kiss, M. Grossi, A. Roggero·Dec 12, 2022
Simulating many-body quantum systems is a promising task for quantum computers. However, the depth of most algorithms, such as product formulas, scales with the number of terms in the Hamiltonian, and can therefore be challenging to implement on near...
NFNet: Non-interacting Fermion Network for Efficient Simulation of Large-scale Quantum Systems
Pengyuan Zhai, S. Yelin·Dec 12, 2022
We present NFNet, a PyTorch-based framework for polynomial-time simulation of large-scale, continuously controlled quantum systems, supporting parallel matrix computation and auto-differentiation of network parameters. It is based on the non-interact...
A SAT Approach to the Initial Mapping Problem in SWAP Gate Insertion for Commuting Gates
A. Matsuo, S. Yamashita, D. Egger·Dec 12, 2022
Most quantum circuits require SWAP gate insertion to run on quantum hardware with limited qubit connectivity. A promising SWAP gate insertion method for blocks of commuting two-qubit gates is a predetermined swap strategy which applies layers of SWAP...
On the quantum simulation of complex networks
Duarte Magano, João P. Moutinho, B. Coutinho·Dec 12, 2022
Quantum walks provide a natural framework to approach graph problems with quantum computers, exhibiting speedups over their classical counterparts for tasks such as the search for marked nodes or the prediction of missing links. Continuous-time quant...
Gaussian breeding for encoding a qubit in propagating light
Kan Takase, Kosuke Fukui, Akito Kawasaki +5 more·Dec 11, 2022
Practical quantum computing requires robust encoding of logical qubits in physical systems to protect fragile quantum information. Currently, the lack of scalability limits the logical encoding in most physical systems, and thus the high scalability ...
Applying NOX Error Mitigation Protocols to Calculate Real-time Quantum Field Theory Scattering Phase Shifts
Zachary P. Parks, Arnaud Carignan-Dugas, Erik J. Gustafson +2 more·Dec 10, 2022
Real-time scattering calculations on a Noisy Intermediate Scale Quantum (NISQ) quantum computer are disrupted by errors that accumulate throughout the circuits. To improve the accuracy of such physics simulations, one can supplement the application c...
Verifying Quantum Advantage Experiments with Multiple Amplitude Tensor Network Contraction.
Yong Liu, Yaojian Chen, Chu Guo +11 more·Dec 9, 2022
The quantum supremacy experiment, such as Google Sycamore [F. Arute et al., Nature (London) 574, 505 (2019).NATUAS0028-083610.1038/s41586-019-1666-5], poses a great challenge for classical verification due to the exponentially increasing compute cost...
Overcoming exponential volume scaling in quantum simulations of lattice gauge theories
Christopher F. Kane, D. Grabowska, B. Nachman +1 more·Dec 9, 2022
Real-time evolution of quantum field theories using classical computers requires resources that scale exponentially with the number of lattice sites. Because of a fundamentally different computational strategy, quantum computers can in principle be u...
Quantum computing for fusion energy science applications
I. Joseph, Y. Shi, M. D. Porter +5 more·Dec 9, 2022
This is a review of recent research exploring and extending present-day quantum computing capabilities for fusion energy science applications. We begin with a brief tutorial on both ideal and open quantum dynamics, universal quantum computation, and ...
How to Sum and Exponentiate Hamiltonians in ZXW Calculus
R. A. Shaikh, Quanlong Wang, Richie Yeung·Dec 8, 2022
This paper develops practical summation techniques in ZXW calculus to reason about quantum dynamics, such as unitary time evolution. First we give a direct representation of a wide class of sums of linear operators, including arbitrary qubits Hamilto...
Correlation as a Resource in Unitary Quantum Measurements
Vishal Johnson, Ashmeet Singh, Reimar Leike +2 more·Dec 7, 2022
Quantum measurement is a physical process. What physical resources and constraints does quantum mechanics require for measurement to produce the classical world we observe? Treating measurement as a fully unitary quantum process, our goal is to show ...
Trotter Errors and the Emergence of Chaos in Quantum Simulation
Kevin W. Kuper, Jon Pajaud, Karthik Chinni +2 more·Dec 7, 2022
As noisy intermediate-scale quantum (NISQ) processors increase in size and complexity, their use as general purpose quantum simulators will rely on algorithms based on the Trotter-Suzuki expansion. We run quantum simulations on a small, highly accura...
Single-shot error mitigation by coherent Pauli checks
Ewout van den Berg, S. Bravyi, J. Gambetta +3 more·Dec 7, 2022
Generating samples from the output distribution of a quantum circuit is a ubiquitous task used as a building block of many quantum algorithms. Here we show how to accomplish this task on a noisy quantum processor lacking full-blown error correction f...
Self-protected quantum simulation and quantum phase estimation in the presence of classical noise
L. -A. Wu·Dec 7, 2022
The decoherence phenomenon inevitably exists in quantum computing processes. Consequently, dynamic suppression of decoherence for instance via dynamical decoupling, quantum error correction codes (QECC) etc. is crucial in accurately executing known o...
Generation of Perfectly Entangled Two and Three Qubits States by Classical Random Interaction
Javed Akram·Dec 6, 2022
This study examines the possibility of finding perfect entanglers for a Hamiltonian which corresponds to several quantum information platforms of interest at the present time. However, in this study, a superconducting circuit is used that stands out ...