Edwin Barnes
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View article: Dynamical error reshaping for dual-rail erasure qubits
Dynamical error reshaping for dual-rail erasure qubits Open
Erasure qubits -- qubits designed to have an error profile that is dominated by detectable leakage errors -- are a promising way to cut down the resources needed for quantum error correction. There have been several recent experiments demo…
View article: Minimal state-preparation times for silicon spin qubits
Minimal state-preparation times for silicon spin qubits Open
Efficient preparation of quantum states on noisy intermediate-scale quantum processors remains a significant challenge to achieve quantum advantage. While gate-based methods have been the traditional approach, pulse-based algorithms offer …
View article: Qubit-efficient quantum chemistry with the ADAPT variational quantum eigensolver and double unitary downfolding
Qubit-efficient quantum chemistry with the ADAPT variational quantum eigensolver and double unitary downfolding Open
In this work, we combine the recently developed double unitary coupled cluster (DUCC) theory with the adaptive, problem-tailored variational quantum eigensolver (ADAPT-VQE) to explore accuracy of unitary downfolded Hamiltonians for quantum…
View article: Implementing and benchmarking dynamically corrected gates on superconducting devices using space curve quantum control
Implementing and benchmarking dynamically corrected gates on superconducting devices using space curve quantum control Open
We use Space Curve Quantum Control (SCQC) to design, experimentally demonstrate, and benchmark dynamically corrected single-qubit gates on IBM hardware, comparing their performance to that of the standard gates provided by IBM. Our gates a…
View article: An automated geometric space curve approach for designing dynamically corrected gates
An automated geometric space curve approach for designing dynamically corrected gates Open
The noisy nature of quantum hardware necessitates the implementation of high-fidelity quantum gates in a noise-insensitive manner. While there exist many powerful methods for designing dynamically corrected gates, they typically involve an…
View article: Floquet-ADAPT-VQE: A Quantum Algorithm to Simulate Non-Equilibrium Physics in Periodically Driven Systems
Floquet-ADAPT-VQE: A Quantum Algorithm to Simulate Non-Equilibrium Physics in Periodically Driven Systems Open
Periodically driven quantum systems exhibit many fascinating phenomena absent in equilibrium systems, but their simulation is more challenging than that of static systems. Consequently, quantum simulation of these systems offers greater op…
View article: Protocol for nearly deterministic parity projection on two photonic qubits
Protocol for nearly deterministic parity projection on two photonic qubits Open
Photonic parity projection plays an important role in photonic quantum information processing. Nondestructive parity projections normally require high-fidelity controlled-Z gates between photonic and matter qubits, which can be experimenta…
View article: Reducing measurement costs by recycling the Hessian in adaptive variational quantum algorithms
Reducing measurement costs by recycling the Hessian in adaptive variational quantum algorithms Open
Adaptive protocols enable the construction of more efficient state preparation circuits in variational quantum algorithms (VQAs) by utilizing data obtained from the quantum processor during the execution of the algorithm. This idea origina…
View article: Outcomes from a Workshop on a National Center for Quantum Education
Outcomes from a Workshop on a National Center for Quantum Education Open
In response to numerous programs seeking to advance quantum education and workforce development in the United States, experts from academia, industry, government, and professional societies convened for a National Science Foundation-sponso…
View article: Long-distance photon-mediated and short-distance entangling gates in three-qubit quantum dot spin systems
Long-distance photon-mediated and short-distance entangling gates in three-qubit quantum dot spin systems Open
Superconducting resonator couplers will likely become an essential component in modular semiconductor quantum dot (QD) spin qubit processors, as they help alleviate crosstalk and wiring issues as the number of qubits increases. Here, we fo…
View article: Quantum thermalization and Floquet engineering in a spin ensemble with a clock transition
Quantum thermalization and Floquet engineering in a spin ensemble with a clock transition Open
Studying and controlling quantum many-body interactions is fundamentally important for quantum science and related emerging technologies. Optically addressable solid-state spins offer a promising platform for exploring various quantum many…
View article: Minimal evolution times for fast, pulse-based state preparation in silicon spin qubits
Minimal evolution times for fast, pulse-based state preparation in silicon spin qubits Open
Standing as one of the most significant barriers to reaching quantum advantage, state-preparation fidelities on noisy intermediate-scale quantum processors suffer from quantum-gate errors, which accumulate over time. A potential remedy is …
View article: Deterministic Generation of Qudit Photonic Graph States from Quantum Emitters
Deterministic Generation of Qudit Photonic Graph States from Quantum Emitters Open
We propose and analyze deterministic protocols to generate qudit photonic graph states from quantum emitters. We show that our approach can be applied to generate any qudit graph state and we exemplify it by constructing protocols to gener…
View article: Dynamically corrected gates in silicon singlet-triplet spin qubits
Dynamically corrected gates in silicon singlet-triplet spin qubits Open
Fault-tolerant quantum computation requires low physical-qubit gate errors. Many approaches exist to reduce gate errors, including both hardware- and control-optimization strategies. Dynamically corrected gates are designed to cancel speci…
View article: Ballast charges for semiconductor spin qubits
Ballast charges for semiconductor spin qubits Open
Semiconductor spin qubits are an attractive platform for quantum computing, but their performance is degraded primarily by fluctuating electromagnetic environments. We introduce the concept of ballast charges, which are induced charges on …
View article: High-throughput assessment of defect-nuclear spin register controllability for quantum memory applications
High-throughput assessment of defect-nuclear spin register controllability for quantum memory applications Open
Quantum memories play a key role in facilitating tasks within quantum networks and quantum information processing, including secure communications, advanced quantum sensing, and distributed quantum computing. Progress in characterizing lar…
View article: Generation of genuine all-way entanglement in defect-nuclear spin systems through dynamical decoupling sequences
Generation of genuine all-way entanglement in defect-nuclear spin systems through dynamical decoupling sequences Open
Multipartite entangled states are an essential resource for sensing, quantum error correction, and cryptography. Color centers in solids are one of the leading platforms for quantum networking due to the availability of a nuclear spin memo…
View article: Hilbert Space Fragmentation and Subspace Scar Time-Crystallinity in Driven Homogeneous Central-Spin Models
Hilbert Space Fragmentation and Subspace Scar Time-Crystallinity in Driven Homogeneous Central-Spin Models Open
We study the stroboscopic non-equilibrium quantum dynamics of periodically kicked Hamiltonians involving homogeneous central-spin interactions. The system exhibits a strong fragmentation of Hilbert space into four-dimensional Floquet-Krylo…
View article: Linear Optical Logical Bell State Measurements with Optimal Loss-Tolerance Threshold
Linear Optical Logical Bell State Measurements with Optimal Loss-Tolerance Threshold Open
17pages, 14 figures
View article: Protocol for nearly deterministic parity projection on two photonic qubits
Protocol for nearly deterministic parity projection on two photonic qubits Open
Photonic parity projection plays a significant role in photonic quantum information processing. Non-destructive parity projections normally require high-fidelity Controlled-Z gates between photonic and matter qubits, which can be experimen…
View article: Long-distance photon-mediated and short-distance entangling gates in three-qubit quantum dot spin systems
Long-distance photon-mediated and short-distance entangling gates in three-qubit quantum dot spin systems Open
Superconducting microwave resonator couplers will likely become an essential component in modular semiconductor quantum dot (QD) spin qubit processors, as they help alleviate cross-talk and wiring issues as the number of qubits increases. …
View article: Designing dynamically corrected gates robust to multiple noise sources using geometric space curves
Designing dynamically corrected gates robust to multiple noise sources using geometric space curves Open
Noise-induced gate errors remain one of the main obstacles to realizing a broad range of quantum information technologies. Dynamical error suppression using carefully designed control schemes is critical for overcoming this challenge. Such…
View article: Leakage Reduces Device Coherence Demands for Pulse-Level Molecular Simulations
Leakage Reduces Device Coherence Demands for Pulse-Level Molecular Simulations Open
Quantum simulation on noisy intermediate-scale quantum devices is severely limited by short qubit coherence times. A variational pulse-shaping algorithm known as ctrl-VQE was recently proposed to address this issue by eliminating the need …
View article: Avoiding symmetry roadblocks and minimizing the measurement overhead of adaptive variational quantum eigensolvers
Avoiding symmetry roadblocks and minimizing the measurement overhead of adaptive variational quantum eigensolvers Open
Quantum simulation of strongly correlated systems is potentially the most feasible useful application of near-term quantum computers. Minimizing quantum computational resources is crucial to achieving this goal. A promising class of algori…
View article: Extracting perfect GHZ states from imperfect weighted graph states via entanglement concentration
Extracting perfect GHZ states from imperfect weighted graph states via entanglement concentration Open
Photonic Greenberger-Horne-Zeilinger (GHZ) states serve as the central resource for a number of important applications in quantum information science, including secret sharing, sensing, and fusion-based quantum computing. The use of photon…
View article: Time-crystalline behavior in central-spin models with Heisenberg interactions
Time-crystalline behavior in central-spin models with Heisenberg interactions Open
Time-crystalline behavior has been predicted and observed in quantum central-spin systems with periodic driving and Ising interactions. Here, we theoretically show that it can also arise in central-spin systems with Heisenberg interactions…
View article: Performance analysis of quantum repeaters enabled by deterministically generated photonic graph states
Performance analysis of quantum repeaters enabled by deterministically generated photonic graph states Open
By encoding logical qubits into specific types of photonic graph states, one can realize quantum repeaters that enable fast entanglement distribution rates approaching classical communication. However, the generation of these photonic grap…
View article: Linear optical logical Bell state measurements with optimal loss-tolerance threshold
Linear optical logical Bell state measurements with optimal loss-tolerance threshold Open
Quantum threshold theorems impose hard limits on the hardware capabilities to process quantum information. We derive tight and fundamental upper bounds to loss-tolerance thresholds in different linear-optical quantum information processing…
View article: Generation of genuine all-way entanglement in defect-nuclear spin systems through dynamical decoupling sequences
Generation of genuine all-way entanglement in defect-nuclear spin systems through dynamical decoupling sequences Open
Multipartite entangled states are an essential resource for sensing, quantum error correction, and cryptography. Color centers in solids are one of the leading platforms for quantum networking due to the availability of a nuclear spin memo…