Explanipedia

Guided sampling ansätzes for variational quantum computing Open

Daniel Gunlycke, J. Stenger, Andrii Maksymov, Ananth P. Kaushik, Martin Roetteler , et al. · 2025

Quantum computing is a promising technology because of the ability of quantum computers to process vector spaces with dimensions that increase exponentially with the simulated system size. Extracting the solution, however, is challenging a…

Quantum-Classical Auxiliary Field Quantum Monte Carlo with Matchgate Shadows on Trapped Ion Quantum Computers Open

Luning Zhao, Joshua J. Goings, Willie Aboumrad, Andrew Arrasmith, Lázaro Calderín , et al. · 2025

We demonstrate an end-to-end workflow to model chemical reaction barriers with the quantum-classical auxiliary field quantum Monte Carlo (QC-AFQMC) algorithm with quantum tomography using matchgate shadows. The workflow operates within an …

Pathfinding Quantum Simulations of Neutrinoless Double-$β$ Decay Open

Roland C. Farrell, Marc Illa, Andrii Maksymov, Aharon Brodutch, Claudio Girotto , et al. · 2025

We present results from co-designed quantum simulations of the neutrinoless double-$β$ decay of a simple nucleus in 1+1D quantum chromodynamics using IonQ's Forte-generation trapped-ion quantum computers. Electrons, neutrinos, and up and d…

Benchmarking a trapped-ion quantum computer with 30 qubits Open

Jwo-Sy Chen, Erik Nielsen, Matthew Ebert, Volkan Inlek, Kenneth Wright , et al. · 2024

Quantum computers are rapidly becoming more capable, with dramatic increases in both qubit count \cite{kim2023evidence} and quality \cite{moses2023race}. Among different hardware approaches, trapped-ion quantum processors are a leading tec…

Toward a Mølmer Sørensen gate with .9999 fidelity Open

R. Blümel, Andrii Maksymov, Ming Li · 2024

Realistic fault-tolerant quantum computing at reasonable overhead requires two-qubit gates with the highest possible fidelity. Typically, an infidelity of is recommended in the literature. Focusing on the phase-sensitive architectu…

Fast classical simulation of Harvard/QuEra IQP circuits Open

Dmitri Maslov, Sergey Bravyi, Felix Tripier, Andrii Maksymov, Joe Latone · 2024

Establishing an advantage for (white-box) computations by a quantum computer against its classical counterpart is currently a key goal for the quantum computation community. A quantum advantage is achieved once a certain computational capa…

Toward a Mølmer Sørensen Gate With .9999 Fidelity Open

R. Blümel, Andrii Maksymov, Ming Li · 2023

Realistic fault-tolerant quantum computing at reasonable overhead requires two-qubit gates with the highest possible fidelity. Typically, an infidelity of $\lesssim 10^{-4}$ is recommended in the literature. Focusing on the phase-sensitive…

Benchmarking a trapped-ion quantum computer with 30 qubits Open

Jwo-Sy Chen, Erik Nielsen, Matthew Ebert, Volkan Inlek, Kenneth Wright , et al. · 2023

Quantum computers are rapidly becoming more capable, with dramatic increases in both qubit count and quality. Among different hardware approaches, trapped-ion quantum processors are a leading technology for quantum computing, with establis…

Enhancing quantum computer performance via symmetrization Open

Andrii Maksymov, Jason Nguyen, Yunseong Nam, Igor L. Markov · 2023

Large quantum computers promise to solve some critical problems not solvable otherwise. However, modern quantum technologies suffer various imperfections such as control errors and qubit decoherence, inhibiting their potential utility. The…

Cross-platform comparison of arbitrary quantum states Open

Daiwei Zhu, Ze-Pei Cian, Crystal Noel, Andrew Risinger, Debopriyo Biswas , et al. · 2022

Experimentally revealing anomalously large dipoles in the dielectric of a quantum circuit Open

Liuqi Yu, Shlomi Matityahu, Yaniv Rosen, Chih-Chiao Hung, Andrii Maksymov , et al. · 2022

Efficient quantum programming using EASE gates on a trapped-ion quantum computer Open

Nikodem Grzesiak, Andrii Maksymov, Pradeep Niroula, Yunseong Nam · 2022

Parallel operations in conventional computing have proven to be an essential tool for efficient and practical computation, and the story is not different for quantum computing. Indeed, there exists a large body of works that study advantag…

Optimizing electronic structure simulations on a trapped-ion quantum computer using problem decomposition Open

Yukio Kawashima, Erika Lloyd, Marc P. Coons, Yunseong Nam, Shunji Matsuura , et al. · 2021

Quantum computers have the potential to advance material design and drug discovery by performing costly electronic structure calculations. A critical aspect of this application requires optimizing the limited resources of the quantum hardw…

Evidence for weakly and strongly interacting two-level systems in amorphous silicon Open

Liuqi Yu, Shlomi Matityahu, Yaniv Rosen, Chih-Chiao Hung, Andrii Maksymov , et al. · 2021

Quantum two-level systems (TLSs) intrinsic to glasses induce decoherence in many modern quantum devices, such as superconducting qubits and single-photon astronomical detectors. Although the low-temperature physics of these TLSs is usually…

Experimentally revealing anomalously large dipoles in a quantum-circuit dielectric Open

Liuqi Yu, Shlomi Matityahu, Yaniv Rosen, Chih-Chiao Hung, Andrii Maksymov , et al. · 2021

Quantum two-level systems (TLSs) intrinsic to glasses induce decoherence in many modern quantum devices, such as superconducting qubits. Although the low-temperature physics of these TLSs is usually well-explained by a phenomenological sta…

Cross-Platform Comparison of Arbitrary Quantum Computations Open

Ze-Pei Cian, Daiwei Zhu, Crystal Noel, Andrew Risinger, Debopriyo Biswas , et al. · 2021

As we approach the era of quantum advantage, when quantum computers (QCs) can outperform any classical computer on particular tasks, there remains the difficult challenge of how to validate their performance. While algorithmic success can …

Detecting Qubit-coupling Faults in Ion-trap Quantum Computers Open

Andrii Maksymov, Jason Nguyen, V. Chaplin, Yunseong Nam, Igor L. Markov · 2021

Ion-trap quantum computers offer a large number of possible qubit couplings, each of which requires individual calibration and can be misconfigured. To enhance the duty cycle of an ion trap, we develop a strategy that diagnoses individual …

Cross-Platform Comparison of Arbitrary Quantum Computations Open

Daiwei Zhu, Ze-Pei Cian, Crystal Noel, Andrew Risinger, Debopriyo Biswas , et al. · 2021

As we approach the era of quantum advantage, when quantum computers (QCs) can outperform any classical computer on particular tasks, there remains the difficult challenge of how to validate their performance. While algorithmic success can …

Efficient Stabilized Two-Qubit Gates on a Trapped-Ion Quantum Computer Open

R. Blümel, Nikodem Grzesiak, Nhung H. Nguyen, Alaina Green, Ming Li , et al. · 2021

In order to scale up quantum processors and achieve a quantum advantage, it is crucial to economize on the power requirement of two-qubit gates, make them robust to drift in experimental parameters, and shorten the gate times. Applicable t…

Optimal calibration of gates in trapped-ion quantum computers Open

Andrii Maksymov, Pradeep Niroula, Yunseong Nam · 2021

To harness the power of quantum computing, it is essential that a quantum computer provide maximal possible fidelity for a quantum circuit. To this end, much work has been done in the context of qubit routing or embedding, i.e., mapping ci…

Efficient and Accurate Electronic Structure Simulation Demonstrated on a Trapped-Ion Quantum Computer Open

Yukio Kawashima, Marc P. Coons, Yunseong Nam, Erika Lloyd, Shunji Matsuura , et al. · 2021

Quantum computers have the potential to perform accurate and efficient electronic structure calculations, enabling the simulation of properties of materials. However, today’s noisy, intermediate-scale quantum (NISQ) devices have a limited …

Anomalous low-energy properties in amorphous solids and the interplay of electric and elastic interactions of tunneling two-level systems Open

Alexander Churkin, Shlomi Matityahu, Andrii Maksymov, Alexander L. Burin, Moshe Schechter · 2021

Tunneling two-level systems (TLSs), generic to amorphous solids, dictate the\nlow-temperature properties of amorphous solids and dominate noise and\ndecoherence in quantum nano-devices. The properties of the TLSs are generally\ndescribed b…

Optimizing Electronic Structure Simulations on a Trapped-ion Quantum Computer using Problem Decomposition Open

Yukio Kawashima, Erika Lloyd, Marc P. Coons, Yunseong Nam, Shunji Matsuura , et al. · 2021

Quantum computers have the potential to advance material design and drug discovery by performing costly electronic structure calculations. A critical aspect of this application requires optimizing the limited resources of the quantum hardw…

Many-body localization in spin chains with long-range transverse interactions: Scaling of critical disorder with system size Open

Andrii Maksymov, Alexander L. Burin · 2020

We investigate many-body localization in the chain of interacting spins with\na transverse power-law interaction, $J_{0}/r^{\\alpha}$, and random on-site\npotentials, $\\phi_i \\in \\left(-W/2,W/2\\right)$, in the long-range limit,\n$\\alp…

Theory of nonlinear microwave absorption by interacting two-level systems Open

Alexander L. Burin, Andrii Maksymov · 2018

The microwave absorption and noise caused by quantum two-level systems (TLS)\ndramatically suppress the coherence in Josephson junction qubits that are\npromising candidates for a quantum information applications. Microwave\nabsorption by …

Comment on “Many-body localization in Ising models with random long-range interactions” Open

Andrii Maksymov, Noah Rahman, Eliot Kapit, Alexander L. Burin · 2017

This comment is dedicated to the investigation of many-body localization in a\nquantum Ising model with long-range power law interactions, $r^{-\\alpha}$,\nrelevant for a variety of systems ranging from electrons in Anderson insulators\nto…

Electronic torsional sound in linear atomic chains: Chemical energy transport at 1000 km/s Open

Arkady Kurnosov, Igor V. Rubtsov, Andrii Maksymov, Alexander L. Burin · 2016

We investigate entirely electronic torsional vibrational modes in linear cumulene chains. The carbon nuclei of a cumulene are positioned along the primary axis so that they can participate only in the transverse and longitudinal motions. H…

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