Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Simulations of the Non-Unitary Time Evolution and Applications to Neutral-Kaon Oscillations
Ying Chen, Yunheng Ma, Shun Zhou·May 11, 2021
In light of recent exciting progress in building up quantum computing facilities based on both optical and cold-atom techniques, the algorithms for quantum simulations of particle-physics systems are in rapid progress. In this paper, we propose an ef...
Benchmarking near-term quantum computers via random circuit sampling
Yunchao Liu, M. Otten, Roozbeh Bassirianjahromi +2 more·May 11, 2021
The increasing scale of near-term quantum hardware motivates the need for efficient noise characterization methods, since qubit and gate level techniques cannot capture crosstalk and correlated noise in many qubit systems. While scalable approaches, ...
Full-dimensional Schrödinger wavefunction calculations using tensors and quantum computers: the Cartesian component-separated approach.
B. Poirier, J. Jerke·May 8, 2021
Traditional methods in quantum chemistry rely on Hartree-Fock-based Slater-determinant (SD) representations, whose underlying zeroth-order picture assumes separability by particle. Here, we explore a radically different approach, based on separabilit...
Conditions for Equivalent Noise Sensitivity of Geometric and Dynamical Quantum Gates
R. K. Colmenar, U. Güngördü, J. Kestner·May 6, 2021
Geometric quantum gates are often expected to be more resilient than dynamical gates against certain types of error, which would make them ideal for robust quantum computing. However, this is still up for debate due to seemingly conflicting results in...
Clifford Circuit Optimization with Templates and Symbolic Pauli Gates
S. Bravyi, Ruslan Shaydulin, Shaohan Hu +1 more·May 5, 2021
The Clifford group is a finite subgroup of the unitary group generated by the Hadamard, the CNOT, and the Phase gates. This group plays a prominent role in quantum error correction, randomized benchmarking protocols, and the study of entanglement. He...
Variational quantum eigensolver for dynamic correlation functions
Hongxiang Chen, Max Nusspickel, J. Tilly +1 more·May 4, 2021
Recent practical approaches for the use of current generation noisy quantum devices in the simulation of quantum many-body problems have been dominated by the use of a variational quantum eigensolver (VQE). These coupled quantum-classical algorithms ...
Error Mitigation in Quantum Computers through Instruction Scheduling
Kaitlin N. Smith, Gokul Subramanian Ravi, Prakash Murali +4 more·May 4, 2021
Quantum systems have potential to demonstrate significant computational advantage, but current quantum devices suffer from the rapid accumulation of error that prevents the storage of quantum information over extended periods. The unintentional coupl...
Pulse-efficient circuit transpilation for quantum applications on cross-resonance-based hardware
N. Earnest, C. Tornow, D. Egger·May 3, 2021
We show a pulse-efficient circuit transpilation framework for noisy quantum hardware. This is achieved by scaling cross-resonance pulses and exposing each pulse as a gate to remove redundant single-qubit operations with the transpiler.Crucially, no a...
Design of an Integrated Bell-State Analyzer on a Thin-Film Lithium Niobate Platform
Uday Saha, E. Waks·May 3, 2021
Trapped ions are excellent candidates for quantum computing and quantum networks because of their long coherence times, ability to generate entangled photons as well as high fidelity single- and two-qubit gates. To scale up trapped ion quantum comput...
Automatically Differentiable Quantum Circuit for Many-qubit State Preparation
Peng Zhou, Rui Hong, Shi-Ju Ran·Apr 30, 2021
Constructing quantum circuits for efficient state preparation belongs to the central topics in the field of quantum information and computation. As the number of qubits grows fast, methods to derive large-scale quantum circuits are strongly desired. ...
Optimizing Parameterized Quantum Circuits With Free-Axis Single-Qubit Gates
Hiroshi C. Watanabe, Rudy Raymond, Yuko Ohnishi +2 more·Apr 30, 2021
Variational quantum algorithms, which utilize parameterized quantum circuits (PQCs), are promising tools to achieve quantum advantage for optimization problems on near-term quantum devices. Their PQCs have been conventionally constructed from paramet...
Verification of Distributed Quantum Programs
Yuan Feng, Sanjiang Li, M. Ying·Apr 30, 2021
Distributed quantum systems and especially the Quantum Internet have the ever-increasing potential to fully demonstrate the power of quantum computation. This is particularly true given that developing a general-purpose quantum computer is much more ...
Hot-Start Optimization for Variational Quantum Eigensolver
Belozerova Polina, S. Arthur, Zotov Yuriy +2 more·Apr 30, 2021
The Variational Quantum Eigensolver (VQE) is one the most perspective algorithms for simulation of quantum many body physics that have recently attached a lot of attention and believed would be practical for implementation on the near term quantum de...
Universal set of quantum gates for the flip-flop qubit in the presence of 1/f noise
E. Ferraro, Davide Rei, M. Paris +1 more·Apr 29, 2021
Impurities hosted in semiconducting solid matrices represent an extensively studied platform for quantum computing applications. In this scenario, the so-called flip-flop qubit emerges as a convenient choice for scalable implementations in silicon. F...
Quantum circuit synthesis of Bell and GHZ states using projective simulation in the NISQ era
O. Pires, E. I. Duzzioni, J. Marchi +1 more·Apr 27, 2021
Quantum Computing has been evolving in the last years. Although nowadays quantum algorithms performance has shown superior to their classical counterparts, quantum decoherence and additional auxiliary qubits needed for error tolerance routines have b...
Quantifying entanglement in cluster states built with error-prone interactions
Z. Qin, Woo-Ram Lee, B. Demarco +3 more·Apr 26, 2021
Measurement-based quantum computing is an alternative paradigm to the circuit-based model. This approach can be advantageous in certain scenarios, such as when read-out is fast and accurate, but two-qubit gates realized via inter-particle interaction...
Adaptive variational quantum eigensolvers for highly excited states
Feng Zhang, N. Gomes, Yongxin Yao +2 more·Apr 26, 2021
Highly excited states of quantum many-body systems are central objects in the study of quantum dynamics and thermalization that challenge classical computational methods due to their volume-law entanglement content. In this work, we explore the poten...
Fault-tolerant resource estimate for quantum chemical simulations: Case study on Li-ion battery electrolyte molecules
Isaac H. Kim, Ye-Hua Liu, Sam Pallister +3 more·Apr 21, 2021
We estimate the resources required in the fusion-based quantum computing scheme to simulate electrolyte molecules in Li-ion batteries on a fault-tolerant, photonic quantum computer. We focus on the molecules that can provide practical solutions to in...
Efficient Measure for the Expressivity of Variational Quantum Algorithms.
Yuxuan Du, Zhuozhuo Tu, Xiao Yuan +1 more·Apr 20, 2021
The superiority of variational quantum algorithms (VQAs) such as quantum neural networks (QNNs) and variational quantum eigensolvers (VQEs) heavily depends on the expressivity of the employed Ansätze. Namely, a simple Ansatz is insufficient to captur...
Improved Weak Simulation of Universal Quantum Circuits by Correlated $L_1$ Sampling
L. Kocia·Apr 15, 2021
Bounding the cost of classically simulating the outcomes of universal quantum circuits to additive error δ is often called weak simulation and is a direct way to determine when they confer a quantum advantage. Weak simulation of the T+Clifford gatese...