Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Nonlinear chiral magnetic waves
Kazuki Ikeda, D. Kharzeev, S. Shi·May 9, 2023
The chiral magnetic wave (CMW) is a macroscopic quantum phenomenon that arises due to the mixing of the electric and chiral charge oscillations induced by the chiral anomaly. In this study we report the first quantum simulation (on classical hardware...
Quantum Flow Algorithms for Simulating Many-Body Systems on Quantum Computers.
K. Kowalski, Nicholas P. Bauman·May 9, 2023
We conducted quantum simulations of strongly correlated systems using the quantum flow (QFlow) approach, which enables sampling large subspaces of the Hilbert space through coupled variational problems in reduced dimensionality active spaces. Our QFl...
Bursts of polarised single photons from atom-cavity sources
Jann Ernst, Juan-Rafael Álvarez, T. Barrett +1 more·May 8, 2023
Photonic qubits play an instrumental role in the development of advanced quantum technologies, including quantum networking, boson sampling and measurement based quantum computing. A promising framework for the deterministic production of indistingui...
Adaptive Quantum Tomography in a Weak Measurement System with Superconducting Circuits
Hyeok Hwang, Jae-Gwan Choi, Eunseong Kim·May 8, 2023
Adaptive tomography has been widely investigated to achieve faster state tomography processing of quantum systems. Infidelity of the nearly pure states in a quantum information process generally scales as O(1/sqrt(N) ), which requires a large number ...
Folded Spectrum VQE: A Quantum Computing Method for the Calculation of Molecular Excited States
Lila Cadi Tazi, A. Thom·May 8, 2023
The recent developments of quantum computing present novel potential pathways for quantum chemistry as the scaling of the computational power of quantum computers could be harnessed to naturally encode and solve electronic structure problems. Theoret...
Quantum simulation of the 1D Fermi-Hubbard model as a $\mathrm{Z}_2$ lattice-gauge theory
Uliana E. Khodaeva, D. Kovrizhin, J. Knolle·May 8, 2023
The Fermi-Hubbard model is one of the central paradigms in the physics of strongly-correlated quantum many-body systems. Here we propose a quantum circuit algorithm based on the $\mathrm{Z}_2$ lattice gauge theory (LGT) representation of the one-dime...
Efficient information recovery from Pauli noise via classical shadow
Yifei Chen, Zhan Yu, Chenghong Zhu +1 more·May 6, 2023
The rapid advancement of quantum computing has led to an extensive demand for effective techniques to extract classical information from quantum systems, particularly in fields like quantum machine learning and quantum chemistry. However, quantum sys...
Direct Collocation for Quantum Optimal Control
A. Trowbridge, Aditya Bhardwaj, Kevin He +2 more·May 5, 2023
We present an adaptation of direct collocation - a trajectory optimization method commonly used in robotics and aerospace applications - to quantum optimal control (QOC); we refer to this method as Pade Integrator COllocation (PICO). This approach su...
A Race-Track Trapped-Ion Quantum Processor
S. Moses, C. Baldwin, M. S. Allman +93 more·May 5, 2023
We describe and benchmark a new quantum charge-coupled device (QCCD) trapped-ion quantum computer based on a linear trap with periodic boundary conditions, which resembles a race track. The new system successfully incorporates several technologies cr...
Erasure conversion in a high-fidelity Rydberg quantum simulator
P. Scholl, Adam L. Shaw, R. Tsai +3 more·May 5, 2023
Minimizing and understanding errors is critical for quantum science, both in noisy intermediate scale quantum (NISQ) devices^ 1 and for the quest towards fault-tolerant quantum computation^ 2 , 3 . Rydberg arrays have emerged as a prominent platform ...
Microarchitectures for Heterogeneous Superconducting Quantum Computers
S. Stein, S. Sussman, T. Tomesh +12 more·May 5, 2023
Noisy Intermediate-Scale Quantum Computing (NISQ) has dominated headlines in recent years, with the longer-term vision of Fault-Tolerant Quantum Computation (FTQC) offering significant potential albeit at currently intractable resource costs and quan...
Repetitive Readout and Real-Time Control of Nuclear Spin Qubits in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:msup><mml:mi /><mml:mn>171</mml:mn></mml:msup><mml:mi>Yb</mml:mi></mml:math> Atoms
W. Huie, Lintao Li, Neville Chen +4 more·May 4, 2023
We demonstrate high fidelity repetitive projective measurements of nuclear spin qubits in an array of neutral ytterbium-171 ($^{171}$Yb) atoms. We show that the qubit state can be measured with a fidelity of 0.995(4) under a condition that leaves it ...
Seeking a quantum advantage with trapped-ion quantum simulations of condensed-phase chemical dynamics
Mingyu Kang, Hanggai Nuomin, Sutirtha N Chowdhury +8 more·May 4, 2023
Simulating the quantum dynamics of molecules in the condensed phase represents a longstanding challenge in chemistry. Trapped-ion quantum systems may serve as a platform for the analog-quantum simulation of chemical dynamics that is beyond the reach ...
Variational quantum algorithms for simulation of Lindblad dynamics
Tasneem M Watad, N. Lindner·May 4, 2023
We introduce variational hybrid classical-quantum algorithms to simulate the Lindblad master equation and its adjoint for time-evolving Markovian open quantum systems and quantum observables. Our methods are based on a direct representation of densit...
Simulating Z_{2} lattice gauge theory on a quantum computer.
Clement Charles, Erik J. Gustafson, Elizabeth Hardt +6 more·May 3, 2023
The utility of quantum computers for simulating lattice gauge theories is currently limited by the noisiness of the physical hardware. Various quantum error mitigation strategies exist to reduce the statistical and systematic uncertainties in quantum...
Mitigating crosstalk errors by randomized compiling: Simulation of the BCS model on a superconducting quantum computer
H. Perrin, Thibault Scoquart, A. Shnirman +2 more·May 3, 2023
We develop and apply an extension of the randomized compiling (RC) protocol that includes a special treatment of neighboring qubits and dramatically reduces crosstalk effects caused by the application of faulty gates on superconducting qubits in IBMQ...
Fast Quantum Gate Design with Deep Reinforcement Learning Using Real-Time Feedback on Readout Signals
E. Wright, Rog´erio de Sousa·May 2, 2023
The design of high-fidelity quantum gates is difficult because it requires the optimization of two competing effects, namely maximizing gate speed and minimizing leakage out of the qubit subspace. We propose a deep reinforcement learning algorithm th...
Blueprint of a Molecular Spin Quantum Processor
A. Chiesa, S. Roca, S. Chicco +6 more·May 2, 2023
The implementation of a universal quantum processor still poses fundamental issues related to error mitigation and correction, which demand to investigate also platforms and computing schemes alternative to the main stream. A possibility is offered b...
Detecting the critical point through entanglement in the Schwinger model
Kazuki Ikeda, D. Kharzeev, R. Meyer +1 more·May 1, 2023
Using quantum simulations on classical hardware, we study the phase diagram of the massive Schwinger model with a $\theta$-term at finite chemical potential $\mu$. We find that the quantum critical point in the phase diagram of the model can be detec...
Unitary Coupled Cluster: Seizing the Quantum Moment
I. Magoulas, Francesco A. Evangelista·May 1, 2023
Shallow, CNOT-efficient quantum circuits are crucial for performing accurate computational chemistry simulations on current noisy quantum hardware. Here, we explore the usefulness of noniterative energy corrections, based on the method of moments of ...