7,497 research outputs found
A bird's eye view of quantum computers
Quantum computers are discussed in the general framework of computation, the
laws of physics and the foundations of quantum mechanics.Comment: 6 pages, 1 figur
Quantum Computing in the NISQ era and beyond
Noisy Intermediate-Scale Quantum (NISQ) technology will be available in the
near future. Quantum computers with 50-100 qubits may be able to perform tasks
which surpass the capabilities of today's classical digital computers, but
noise in quantum gates will limit the size of quantum circuits that can be
executed reliably. NISQ devices will be useful tools for exploring many-body
quantum physics, and may have other useful applications, but the 100-qubit
quantum computer will not change the world right away --- we should regard it
as a significant step toward the more powerful quantum technologies of the
future. Quantum technologists should continue to strive for more accurate
quantum gates and, eventually, fully fault-tolerant quantum computing.Comment: 20 pages. Based on a Keynote Address at Quantum Computing for
Business, 5 December 2017. (v3) Formatted for publication in Quantum, minor
revision
Collective Modes in Light Nuclei from First Principles
Results for ab initio no-core shell model calculations in a symmetry-adapted
SU(3)-based coupling scheme demonstrate that collective modes in light nuclei
emerge from first principles. The low-lying states of 6Li, 8Be, and 6He are
shown to exhibit orderly patterns that favor spatial configurations with strong
quadrupole deformation and complementary low intrinsic spin values, a picture
that is consistent with the nuclear symplectic model. The results also suggest
a pragmatic path forward to accommodate deformation-driven collective features
in ab initio analyses when they dominate the nuclear landscape.Comment: 5 pages 3 figures, accepted to Physical Review Letter
Lattice Gauge Theories at the Energy Frontier
This White Paper has been prepared as a planning document for the Division of
High Energy Physics of the U. S. Department of Energy. Recent progress in
lattice-based studies of physics beyond the standard model is summarized, and
major current goals of USQCD research in this area are presented. Challenges
and opportunities associated with the recently discovered 126 GeV Higgs-like
particle are highlighted. Computational resources needed for reaching important
goals are described. The document was finalized on February 11, 2013 with
references that are not aimed to be complete, or account for an accurate
historical record of the field.Comment: Submitted for the Snowmass 2013 e-Proceedings with 44 pages, 10
figures, and 3 table
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