SLIDE 1
SOLVING THE MYSTERIES OF PARTICLE PHYSICS
WITH GPUS
Waseem Kamleh
GPU Technology Conference April 4-7, 2016 Silicon Valley, California
IBM ASCI WHITE #1 November 2000
4.9 Teraflops (DP) 3000 kW 188 Billion Transistors
OF PARTICLE PHYSICS WITH GPUS Waseem Kamleh GPU Technology - - PowerPoint PPT Presentation
OF PARTICLE PHYSICS WITH GPUS Waseem Kamleh GPU Technology - - PowerPoint PPT Presentation
SOLVING THE MYSTERIES OF PARTICLE PHYSICS WITH GPUS Waseem Kamleh GPU Technology Conference April 4-7, 2016 Silicon Valley, California IBM ASCI WHITE #1 November 2000 4.9 Teraflops (DP) 3000 kW 188 Billion Transistors NVIDIA TESLA K80
SLIDE 2
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NVIDIA TESLA K80
2.9 Teraflops (DP) 0.3 kW 14 Billion Transistors
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PHOENIX HPC @
University of Adelaide
Lenovo NeXtScale
3840 Intel CPU cores; 144 Nvidia K80 GPUs; 15 TB of RAM; Mellanox EDR Infiniband; > 300 Teraflops.
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SEMICONDUCTOR TECHNOLOGY
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ATOMIC LATTICE
QUANTUM MECHANICS
Pauli Exclusion Principle
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THE ATOM
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THE PROTON
Quarks Gluons M = 938 MeV
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J = 1/2 BARYON
3 quarks Half-integer spin Fermion
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WHAT IS A GLUON?
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FORCES ARE CARRIED BY PARTICLES
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QUARK FLAVOURS
Flavour Mass Charge up 3 MeV +2/3 down 5 MeV
- 1/3
strange 0.1 GeV
- 1/3
charm 1.2 GeV +2/3 bottom 4 GeV
- 1/3
top 173 GeV +2/3
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ORIGIN OF MASS
3 + 3 + 5 = 938 MeV?
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WHERE DOES THE OTHER 99% OF YOUR MASS COME FROM?
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LATTICE QCD
Sparse Matrices Key routines coded in CUDA
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QCD VACUUM
Monte Carlo gluon field configuration
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QUARK MASS FUNCTION
Dynamical mass generation
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EMERGENT PHENOMENA
“An emergent behavior or emergent property can appear when a number of simple entities (agents) operate in an environment, forming more complex behaviors as a collective.”
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CENTRE VORTEX MODEL
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MONTE CARLO GLUON FIELD
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VORTEX REMOVED GLUON FIELD
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VORTEX-ONLY GLUON FIELD
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REMOVING VORTICES REMOVES MASS
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VORTEX-ONLY FIELD REPRODUCES MASS FUNCTION
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CENTRE VORTICES ARE THE ORIGIN OF DYNAMICAL MASS GENERATION
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THE LAMBDA(1405) PUZZLE
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u d u u d s
Λ* (1405 MeV) N* (1535 MeV)
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WHY IS THE LAMBDA(1405) SO LIGHT?
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STRANGE MAGNETIC FORM FACTOR
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u d s
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PROBING THE STRUCTURE OF THE LAMBDA (1405)
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LAMBDA(1405) MAGNETIC FORM FACTOR
The internal structure
- f the Lambda(1405)
spontaneously reorganises at the lightest quark mass.
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QUARK SPIN POLARISATION
SPIN UP SPIN DOWN
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KAON
Quark + antiquark Integer spin Meson M = 494 MeV
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u d u s u
ANTIKAON-NUCLEON MOLECULE
938 + 494 = 1432 MeV
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J = 0 J = 1/2
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STRANGE MAGNETIC FORM FACTOR
The kaon has zero orbital angular
momentum and zero spin.
The strange quark does not contribute
to the magnetic form factor of the Λ(1405) when it is in a K N molecule.
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LATTICE HAMILTONIAN MODEL
As the simulation parameters describing the strange quark are held fixed, this is a remarkable environmental effect of unprecedented strength.
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MODEL PREDICTS THE CORRECT MASS
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The Lambda (1405) is a molecular bound state of an anti-kaon and a nucleon.
SLIDE 43
THANK YOU!
Using Lattice QCD and the computational power of
GPUs we have resolved two long-standing mysteries
- f particle physics.
Centre vortices are the fundamental objects
responsible for dynamical mass generation.
http://dx.doi.org/10.1103/PhysRevD.92.074507 http://dx.doi.org/10.1016/j.physletb.2015.06.025
The Lambda(1405) is an antikaon-nucleon molecule,
explaining its anomalously light mass.
http://dx.doi.org/10.1103/PhysRevLett.114.132002