2+1 flavor full QCD configurations for nuclei calculation

The 2+1 flavor full QCD configurations listed below are generated by T. Yamazaki et al. on supercomputers

the PACS-CS, a massively parallel cluster (2560 nodes, peak 14.3 TFLOPS)
at the Center for Computational Sciences, University of Tsukuba
the T2K-Tsukuba, a massively parallel cluster (648 nodes, peak 95.4 TFLOPS)
at the Center for Computational Sciences, University of Tsukuba
the K computer (82944 nodes, peak 10.62 PFLOPS)
at the RIKEN Advanced Institute for Computational Science

Simulation parameters
Configuration ensembles
Naming of Ensembles and Configurations (for ILDG users)
Location of Configurations (for JLDG users)

Simulation parameters

These gauge configurations are generated with a renormalization-group improved gauge action and a non-perturbatively O(a) improved clover quark action at beta = 6/g²=1.90, corresponding to lattice spacing of a \approx 0.09 fm. The scale a is fixed by experimental values of M_pi, M_K, M_Omega. The u,d quark masses correspond to M_pi \approx 0.5 GeV, and the s quark mass is chosen to be the physical one. We have four ensembles corresponding to four lattice sizes, 32³x48, 40³x48, 48³x48, and 64³x64.

Simulations are carried out with domain-decomposed hybrid Monte Carlo (DDHMC) algorithm for u,d quarks and UV-filtered polynomial hybrid Monte Carlo (UVPHMC) algorithm for s quark. The table below shows values of a, La and simulation parameters, tau: trajectory length, (N0,N1,N2): numbers of steps for one trajectory, N_poly: polynomial order for PHMC and Replay: on/off of replay trick. For details, see the papers cited below.

ensemble #	beta	c_SW	a [fm]	K_ud K_s	lattice size	La [fm]	tau	(N0,N1,N2)	N_poly	Replay

1	1.90	1.715	0.0907(13)	0.1373316 0.1367526	32³x48	2.902(42)	1.0	(2,2,10)	260	off

2					40³x48	3.628(52)	1.0	(2,2,15)	320	off

3					48³x48	4.354(62)	1.0	(2,2,16)	320	off

4					64³x64	5.805(83)	1.0	(2,2,18)	340	off

Helium nuclei, deuteron and dineutron in 2+1 flavor lattice QCD
Takeshi Yamazaki, Ken-ichi Ishikawa, Yoshinobu Kuramashi, Akira Ukawa
Phys. Rev. D 86 074514 (2012)

2+1 Flavor Lattice QCD toward the Physical Point
S. Aoki, K.-I. Ishikawa, N. Ishizuka, T. Izubuchi, D. Kadoh, K. Kanaya, Y. Kuramashi, Y. Namekawa, M. Okawa, Y. Taniguchi, A. Ukawa, N. Ukita, T. Yoshie (PACS-CS Collaboration)
Phys. Rev. D 79 034503 (2009)

Configuration ensembles

The table below gives a list of ensembles of configurations. A consecutive set of DDHMC+UVPHMC trajectories for a given value of beta, c_SW, K_ud, K_s on a particular lattice size is called an ensemble. A series name (gM and hM) is given to distinguish multiple DDHMC+UVPHMC runs.

ensemble #	beta	K_ud	K_s	c_SW	lattice size	series	traj. range	missing traj	stored at every (traj)	#config	total #config	size/config [GB]	total [TB]
1	1.90	0.1373316	0.1367526	1.715	32³x48	gM	001400-005410	--	10	402	402	0.844	0.331
2	1.90	0.1373316	0.1367526	1.715	40³x48	gM	000770-002830	--	10	207	207	1.648	0.333
3	1.90	0.1373316	0.1367526	1.715	48³x48	gM	000410-002400	--	10	200	200	2.848	0.556
4	1.90	0.1373316	0.1367526	1.715	64³x64	gM hM	000460-002100 000480-002090	-- --	10 10	165 162	327	9.000	2.874

Naming of Ensembles and Configurations (for ILDG users)

An ensemble is identified by markovChainURI named e.g. as

mc://JLDG/PACS-CS/RCNF2+1/RC64x64_B1900Kud01373316Ks01367526C1715

A configuration is labeled by dataLFN named e.g. as

lfn://JLDG/PACS-CS/RCNF2+1/RC64x64_B1900Kud01373316Ks01367526C1715-gM-002100

Basename of the dataLFN is formmated as
RgClover spatial size x temporal size _ \beta\kappa_ud\kappa_s\c_sw - series - trajectory number

To get full list of markovChainURIs and LFNs, please use QCDml faceted navigation. or follow this link.

Location of Configurations (for JLDG users)

Configurations are placed in the gfarm directory
/gfarm/public/ILDG/JLDG/PACS-CS/RCNF2+1/
and classified in terms of β and κ_ud, κ_s. For example, the directory
/gfarm/public/ILDG/JLDG/PACS-CS/RCNF2+1/RC64x64_B1900/Kud01373316Ks01367526
contains configurations at β=1.900 and κ_ud=0.1373316 κ_s=0.1367526. Filename is the same as basename of dataLFN. All ensemble and configuration XML files can be found in
/gfarm/public/ILDG/JLDG/PACS-CS/RCNF2+1/QCDml-Nucl

Last update: 26 July 2022, H.Ohno