المؤلفون: Pelaez, Emilio, Omole, Victory, Gokhale, Pranav, Rines, Rich, Smith, Kaitlin N., Perlin, Michael A., Hashim, Akel

مصطلحات موضوعية: Quantum Physics

الوصف: Average circuit eigenvalue sampling (ACES) was introduced by Flammia in arXiv:2108.05803 as a protocol to characterize the Pauli error channels of individual gates across the device simultaneously. The original paper posed using ACES to characterize near-term devices as an open problem. This work advances in this direction by presenting a full implementation of ACES for real devices and deploying it to Superstaq arXiv:2309.05157, along with a device-tailored resource estimation obtained through simulations and experiments. Our simulations show that ACES is able to estimate one- and two-qubit non-uniform Pauli error channels to an average eigenvalue absolute error of under $0.003$ and total variation distance of under 0.001 between simulated and reconstructed probability distributions over Pauli errors with $10^5$ shots per circuit using 5 circuits of depth 14. The question of estimating general error channels through twirling techniques in real devices remains open, as it is dependent on a device's native gates, but simulations with the Clifford set show results in agreement with reported hardware data. Experimental results on IBM's Algiers and Osaka devices are presented, where we characterize their error channels as Pauli channels without twirling.
Comment: 7 pages, 6 figures

الوصول الحر: http://arxiv.org/abs/2403.12857Test

المؤلفون: Campbell, Colin, Chong, Frederic T., Dahl, Denny, Frederick, Paige, Goiporia, Palash, Gokhale, Pranav, Hall, Benjamin, Issa, Salahedeen, Jones, Eric, Lee, Stephanie, Litteken, Andrew, Omole, Victory, Owusu-Antwi, David, Perlin, Michael A., Rines, Rich, Smith, Kaitlin N., Goss, Noah, Hashim, Akel, Naik, Ravi, Younis, Ed, Lobser, Daniel, Yale, Christopher G., Huang, Benchen, Liu, Ji

مصطلحات موضوعية: Quantum Physics

الوصف: We describe Superstaq, a quantum software platform that optimizes the execution of quantum programs by tailoring to underlying hardware primitives. For benchmarks such as the Bernstein-Vazirani algorithm and the Qubit Coupled Cluster chemistry method, we find that deep optimization can improve program execution performance by at least 10x compared to prevailing state-of-the-art compilers. To highlight the versatility of our approach, we present results from several hardware platforms: superconducting qubits (AQT @ LBNL, IBM Quantum, Rigetti), trapped ions (QSCOUT), and neutral atoms (Infleqtion). Across all platforms, we demonstrate new levels of performance and new capabilities that are enabled by deeper integration between quantum programs and the device physics of hardware.
Comment: Appearing in IEEE QCE 2023 (Quantum Week) conference

الوصول الحر: http://arxiv.org/abs/2309.05157Test

المؤلفون: Smith, Kaitlin N., Perlin, Michael A., Gokhale, Pranav, Frederick, Paige, Owusu-Antwi, David, Rines, Richard, Omole, Victory, Chong, Frederic T.

مصطلحات موضوعية: Quantum Physics

الوصف: Quantum computing has potential to provide exponential speedups over classical computing for many important applications. However, today's quantum computers are in their early stages, and hardware quality issues hinder the scale of program execution. Benchmarking and simulation of quantum circuits on classical computers is therefore essential to advance the understanding of how quantum computers and programs operate, enabling both algorithm discovery that leads to high-impact quantum computation and engineering improvements that deliver to more powerful quantum systems. Unfortunately, the nature of quantum information causes simulation complexity to scale exponentially with problem size. In this paper, we debut Super.tech's SuperSim framework, a new approach for high fidelity and scalable quantum circuit simulation. SuperSim employs two key techniques for accelerated quantum circuit simulation: Clifford-based simulation and circuit cutting. Through the isolation of Clifford subcircuit fragments within a larger non-Clifford circuit, resource-efficient Clifford simulation can be invoked, leading to significant reductions in runtime. After fragments are independently executed, circuit cutting and recombination procedures allow the final output of the original circuit to be reconstructed from fragment execution results. Through the combination of these two state-of-art techniques, SuperSim is a product for quantum practitioners that allows quantum circuit evaluation to scale beyond the frontiers of current simulators. Our results show that Clifford-based circuit cutting accelerates the simulation of near-Clifford circuits, allowing 100s of qubits to be evaluated with modest runtimes.
Comment: To appear at the 50th International Symposium on Computer Architecture (ISCA 2023)

الوصول الحر: http://arxiv.org/abs/2303.10788Test

المؤلفون: Tomesh, Teague, Gokhale, Pranav, Omole, Victory, Ravi, Gokul Subramanian, Smith, Kaitlin N., Viszlai, Joshua, Wu, Xin-Chuan, Hardavellas, Nikos, Martonosi, Margaret R., Chong, Frederic T.

مصطلحات موضوعية: Quantum Physics, Computer Science - Hardware Architecture

الوصف: The emergence of quantum computers as a new computational paradigm has been accompanied by speculation concerning the scope and timeline of their anticipated revolutionary changes. While quantum computing is still in its infancy, the variety of different architectures used to implement quantum computations make it difficult to reliably measure and compare performance. This problem motivates our introduction of SupermarQ, a scalable, hardware-agnostic quantum benchmark suite which uses application-level metrics to measure performance. SupermarQ is the first attempt to systematically apply techniques from classical benchmarking methodology to the quantum domain. We define a set of feature vectors to quantify coverage, select applications from a variety of domains to ensure the suite is representative of real workloads, and collect benchmark results from the IBM, IonQ, and AQT@LBNL platforms. Looking forward, we envision that quantum benchmarking will encompass a large cross-community effort built on open source, constantly evolving benchmark suites. We introduce SupermarQ as an important step in this direction.
Comment: 17 pages, 4 figures, Awarded Best Paper during the 28th IEEE International Symposium on High-Performance Computer Architecture (HPCA-28), Seoul, South Korea

الوصول الحر: http://arxiv.org/abs/2202.11045Test

المؤلفون: Hashim, Akel, Rines, Rich, Omole, Victory, Naik, Ravi K., Kreikebaum, John Mark, Santiago, David I., Chong, Frederic T., Siddiqi, Irfan, Gokhale, Pranav

مصطلحات موضوعية: Quantum Physics

الوصف: The fermionic SWAP network is a qubit routing sequence that can be used to efficiently execute the Quantum Approximate Optimization Algorithm (QAOA). Even with a minimally-connected topology on an n-qubit processor, this routing sequence enables O(n^2) operations to execute in O(n) steps. In this work, we optimize the execution of fermionic SWAP networks for QAOA through two techniques. First, we take advantage of an overcomplete set of native hardware operations [including 150 ns controlled-pi/2 phase gates with up to 99.67(1)% fidelity] in order to decompose the relevant quantum gates and SWAP networks in a manner which minimizes circuit depth and maximizes gate cancellation. Second, we introduce Equivalent Circuit Averaging, which randomizes over degrees of freedom in the quantum circuit compilation to reduce the impact of systematic coherent errors. Our techniques are experimentally validated on the Advanced Quantum Testbed through the execution of QAOA circuits for finding the ground state of two- and four-node Sherrington-Kirkpatrick spin-glass models with various randomly sampled parameters. We observe a ~60% average reduction in error (total variation distance) for QAOA of depth p = 1 on four transmon qubits on a superconducting quantum processor.

الوصول الحر: http://arxiv.org/abs/2111.04572Test

المؤلفون: Hashim, Akel, Rines, Rich, Omole, Victory, Naik, Ravi K., Kreikebaum, John Mark, Santiago, David I., Chong, Frederic T., Siddiqi, Irfan, Gokhale, Pranav

المساهمون: U.S. Department of Energy, Office of Science, Advanced Scientific Computing Research, National Science Foundation, National Defense Science and Engineering Graduate

المصدر: Physical Review Research ; volume 4, issue 3 ; ISSN 2643-1564

مصطلحات موضوعية: General Physics and Astronomy

الإتاحة: https://doi.org/10.1103/physrevresearch.4.033028Test

المؤلفون: Tomesh, Teague, Gokhale, Pranav, Omole, Victory, Ravi, Gokul Subramanian, Smith, Kaitlin, Viszlai, Joshua, Wu, Xin-Chuan, Hardavellas, Nikos, Martonosi, Margaret, Chong, Frederic

مصطلحات موضوعية: Quantum Computing, Benchmarking

الوصف: The source code and instructions for creating the benchmarks and figures from the paper are zipped in supermarq_hpca_ae.tgz. Please see the README.md for detailed instructions.

العلاقة: https://zenodo.org/record/5786391Test; https://doi.org/10.5281/zenodo.5786391Test; oai:zenodo.org:5786391

الإتاحة: https://doi.org/10.5281/zenodo.5786391Test
https://doi.org/10.5281/zenodo.5669228Test
https://zenodo.org/record/5786391Test