"gauge ensemble" are Markov Chain Monte Carlo datasets containing random space-time configurations of the chromo-electromagnetic field. Each folder contains one or more chains. They are generated using the most powerful supercomputers and constitute the basic data structure for Lattice QCD computations. The data available here has been donated by different research groups, they are are stored in the NERSC HPSS. Different groups use different file formats to store the ensembles. Here is a script to detect and convert file formats.

Data from BNL Collaboration

Data from CU Collaboration

Data from MILC Collaboration

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.25 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 42

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.255 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 50

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.26 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 45

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.265 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 48

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.27 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 42

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.28 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 40

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.25 Staggered Dynamical Nf=2 m=0.0125 R algorithm

Number of configurations: 61

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.26 Staggered Dynamical Nf=2 m=0.0125 R algorithm

Number of configurations: 91

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.27 Staggered Dynamical Nf=2 m=0.0125 R algorithm

Number of configurations: 126

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 12 x 12 x 12 x 4

Action: Beta=5.28 Staggered Dynamical Nf=2 m=0.0125 R algorithm

Number of configurations: 57

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 16 x 16 x 16 x 32

Action: Beta=5.415 Staggered Dynamical Nf=2 m=0.025 R algorithm

Number of configurations: 201

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 8 x 8 x 8 x 4

Action: Beta=5.25 Staggered Dynamical Nf=2 m=0.0125 R algorithm

Number of configurations: 39

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 8 x 8 x 8 x 4

Action: Beta=5.26 Staggered Dynamical Nf=2 m=0.0125 R algorithm

Number of configurations: 58

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Geometry: 8 x 8 x 8 x 4

Action: Beta=5.27 Staggered Dynamical Nf=2 m=0.0125 R algorithm

Number of configurations: 27

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Geometry: 8 x 8 x 8 x 4

Action: Beta=5.28 Staggered Dynamical Nf=2 m=0.0125 R algorithm

Number of configurations: 36

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Geometry: 8 x 8 x 8 x 4

Action: Beta=5.28 Staggered Dynamical Nf=2 m=0.025 R algorithm

Number of configurations: 56

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

BNL Test Lattices

Number of configurations: 15 Author(s): BNL Collaboration

Original References

Geometry: 24 x 24 x 24 x 12

Action: Beta=5.65 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 149

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Two-flavor staggered fermion thermodynamics at N_t = 12

Claude Bernard, Tom Blum, Carleton DeTar, Urs M. Heller, James E. Hetrick, Doug Toussaint, and Robert Sugar

Phys. Rev. D54 (1996), 4585-4594

http://arxiv.org/abs/hep-lat/9605028

Geometry: 24 x 24 x 24 x 12

Action: Beta=5.725 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 129

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Two-flavor staggered fermion thermodynamics at N_t = 12

Claude Bernard, Tom Blum, Carleton DeTar, Urs M. Heller, James E. Hetrick, Doug Toussaint, and Robert Sugar

Phys. Rev. D54 (1996), 4585-4594

http://arxiv.org/abs/hep-lat/9605028

Geometry: 24 x 24 x 24 x 12

Action: Beta=5.85 Staggered Dynamical Nf=2 m=0.008 R algorithm

Number of configurations: 128

Authors: The MILC Collaboration

Classic one-plaquette Wilson action, with dyamical staggered fermions.

Original References

Two-flavor staggered fermion thermodynamics at N_t = 12

Claude Bernard, Tom Blum, Carleton DeTar, Urs M. Heller, James E. Hetrick, Doug Toussaint, and Robert Sugar

Phys. Rev. D54 (1996), 4585-4594

http://arxiv.org/abs/hep-lat/9605028

Number of configurations: 1 Author(s): MILC Collaboration

u_MILC_l2464f21b676m005m050.2496

Data from OSU Collaboration

Geometry: 16x16x16x32

Action: Wilson Beta=5.8 Quenched

Number of configurations: 200

Authors: OSU

Simple Wilson action. Configs generated w/ 4:1 ratio of SU(2) over-relaxed and SU(2) heatbath. Successive configurations are separated by 1000 sweeps, where one sweep consists of three SU(2) subgroup updates. They were fixed to Landau gauge using the over-relaxed "LANL" algorithm.

Original References

G. Kilcup, D. Pekurovsky and L.Venkataraman (OSU), http://arxiv.org/abs/hep-lat/9609006

Derivative References

Sample header

BEGIN_HEADER
HDR_VERSION = 1.0
DATATYPE = 4D_SU3_GAUGE
DIMENSION_1 = 16
DIMENSION_2 = 16
DIMENSION_3 = 16
DIMENSION_4 = 32
CHECKSUM = 83a8c899
LINK_TRACE = 0.8410345802
PLAQUETTE = 0.5677659554
CREATOR = OSU
CREATOR_HARDWARE = OSC T3E
ARCHIVE_DATE = Fri Oct 2 04:21:17 1998
ENSEMBLE_LABEL = 16^3x32 Quenched beta=5.8
FLOATING_POINT = IEEE32
ENSEMBLE_ID = OSU_Q58a
BETA = 5.8
SEQUENCE_NUMBER = 101
END_HEADER

Geometry: 16x16x16x32

Action: Wilson Beta=6.0 Quenched

Number of configurations: 221

Authors: OSU

Simple Wilson action. Configs generated w/ 4:1 ratio of SU(2) over-relaxed and SU(2) heatbath. Successive configurations are separated by 1000 sweeps, where one sweep consists of three SU(2) subgroup updates. They were fixed to Landau gauge using the over-relaxed "LANL" algorithm.

Original References

G. Kilcup, D. Pekurovsky and L.Venkataraman (OSU), http://arxiv.org/abs/hep-lat/9609006

Derivative References

L.Venkataraman and G. Kilcup (OSU), http://arxiv.org/abs/hep-lat/9711006

Sample Header

BEGIN_HEADER
HDR_VERSION = 1.0
DATATYPE = 4D_SU3_GAUGE
DIMENSION_1 = 16
DIMENSION_2 = 16
DIMENSION_3 = 16
DIMENSION_4 = 32
CHECKSUM = 74d8f9a0
LINK_TRACE = 0.8604711102
PLAQUETTE = 0.5930697833
CREATOR = OSU
CREATOR_HARDWARE = OSC T3E
ARCHIVE_DATE = Mon Sep 28 17:51:25 1998
ENSEMBLE_LABEL = 16^3x32 Quenched beta=6.0
FLOATING_POINT = IEEE32BIG
ENSEMBLE_ID = OSU_Q60a
BETA = 6.0
SEQUENCE_NUMBER = 010
END_HEADER

body { background-color: #FFFFFF; color: #000000; } :link { color: #0000FF } :visited { color: #000080 } :active { color: #FF0000 }

Geometry: 16x16x16x32

Action: Wilson beta=5.3, staggered m =0.01

Number of configurations: 40

Authors: OSU

Standard Wilson gauge action with beta=5.3 and staggered fermion action with m =0.01 generated with HMD R algorithm starting from an ordered configuration.

Original Reference

Daniel R. Nelson, George T. Fleming and Gregory W. Kilcup, “Is strong CP invariance due to a massless up quark?,” http://arxiv.org/abs/hep-lat/0112029.

Sample Header

BEGIN_HEADER
CHECKSUM = 233ed2b4
LINK_TRACE = 0.826261
PLAQUETTE = 0.532342
DATATYPE = 4D_SU3_GAUGE
HDR_VERSION = 1.0
STORAGE_FORMAT = 1.0
DIMENSION_1 = 16
DIMENSION_2 = 16
DIMENSION_3 = 16
DIMENSION_4 = 32
BOUNDARY_1 = PERIODIC
BOUNDARY_2 = PERIODIC
BOUNDARY_3 = PERIODIC
BOUNDARY_4 = PERIODIC
ENSEMBLE_ID = OSU_S3F_B53_M01a
ENSEMBLE_LABEL = 16x16x16x32 stag N_f=3 beta=5.3 m=0.01
SEQUENCE_NUMBER = 1000
CREATOR = George T. Fleming
CREATOR_HARDWARE = OSU QCDSP
CREATION_DATE = Fri Jul 27 07:26:40 2001
ARCHIVE_DATE = Fri Jul 27 07:26:40 2001
FLOATING_POINT = IEEE32BIG
END_HEADER

gfleming@mps.ohio-state.edu), last updated 05 June 2002.

]]

body { background-color: #FFFFFF; color: #000000; } :link { color: #0000FF } :visited { color: #000080 } :active { color: #FF0000 }

Geometry: 16x16x16x32

Action: Wilson beta=5.3, staggered m =0.01

Number of configurations: 40

Authors: OSU

Standard Wilson gauge action with beta=5.3 and staggered fermion action with m =0.01 generated with HMD R algorithm starting from a disordered configuration.

Original Reference

Daniel R. Nelson, George T. Fleming and Gregory W. Kilcup, “Is strong CP invariance due to a massless up quark?,” http://arxiv.org/abs/hep-lat/0112029.

Sample Header

BEGIN_HEADER
CHECKSUM = 57c3f415
LINK_TRACE = 0.826994
PLAQUETTE = 0.533319
DATATYPE = 4D_SU3_GAUGE
HDR_VERSION = 1.0
STORAGE_FORMAT = 1.0
DIMENSION_1 = 16
DIMENSION_2 = 16
DIMENSION_3 = 16
DIMENSION_4 = 32
BOUNDARY_1 = PERIODIC
BOUNDARY_2 = PERIODIC
BOUNDARY_3 = PERIODIC
BOUNDARY_4 = PERIODIC
ENSEMBLE_ID = OSU_S3F_B53_M01c
ENSEMBLE_LABEL = 16x16x16x32 stag N_f=3 beta=5.3 m=0.01
SEQUENCE_NUMBER = 1000
CREATOR = George T. Fleming
CREATOR_HARDWARE = RBRC QCDSP qc1
CREATION_DATE = Tue May 15 13:45:52 2001
ARCHIVE_DATE = Tue May 15 13:45:52 2001
FLOATING_POINT = IEEE32BIG
END_HEADER

gfleming@mps.ohio-state.edu), last updated 05 June 2002.

]]

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configs/MILC/64192f21b781m0028m014/

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configs/MILC/a0.045fm/

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configs/MILC/a0.045fm/l64192f21b781m0028m014/

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configs/MILC/a0.09fm/l2896f3b718m031/

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