CASINO manual - Theory of Condensed Matter

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• localizer: Utility to read in a pwfn.data file containing extended orbitals expanded in plane waves and generate localized orbitals, also represented in a plane-wave basis. See Sec. 27. • louis: MDT’s pilot wave quantum trajectory code, included with casino to help with the development of pilot-wave QMC. Also includes the utilities runlouis, plot louis, louishelp, louisplot2d, louisplot3d and modify louis inputs, which do the obvious things. See utils/louis/README for more details. • make new mpc: Convert casino 1.x density.data and eepot.data files into casino 2.x mpc.data. Located in the converters 2.0 directory. • make p stars: Utility for helping users construct p terms in the Jastrow factor. Type make p stars and answer the questions. Note that p should have the symmetry of the simulation cell rather than the primitive cell. See Sec. 22. • menugrep Script to facilitate the process of editing lines containing items found by grep: useful for editing the casino source code. See documentation in ~/CASINO/utils/menugrep/. • modify inputs: Simultaneously modify all input files in subdirectories of the current directory (e.g., ~/CASINO/examples/) by adding or deleting keywords or by changing the value of a keyword. I (MDT) can remember a time when I did this by hand (with 100+ examples); that was entertaining. • mpr: Pretty printing script for source-code listings, which saves trees (assuming a2ps has been set up correctly for your system). • multirun: Script for running several casino runs sequentially changing any set of parameters in the input file for each of them. • nstring: Generate integer number sequences. Useful for strings required in correlation.data files. • plot 2D: This script generates 2D plots of trial wave functions and particle positions using data produced by qmc plot. The script uses gnuplot. See the documentation in ~/CASINO/utils/plot 2D/ for further information. • plot bffield, plot bfphi: These scripts generate 2D plots of the backflow transformation and the inhomogeneous φ term (electron–electron–nucleus) of the backflow transformation. They make use of gnuplot. See documentation in ~/CASINO/utils/plot backflow/. • plot expval: General program to read a casino-produced expval.data file and visualize the results. Converts the data to standard 1D lineplot.dat files which can be visualized with xmgrace, or 2Dplot.dat/3Dplot.dat files for higher dimensional data which can be visualized by gnuplot (via the casino plot 2D utility). • plot hist: General program to read vmc.hist and dmc.hist files and plot selected quantities as a function of move number. • plot reblock: This script uses xmgrace to plot the reblocked standard error in the mean energy against reblocking transformation number, which is contained in the reblock.plot file produced by the reblock utility. An example of the use of this script is given in Sec. 6.2. • plot mpc: Reads a casino mpc.data file (containing a Fourier representation of the density of the Slater wave function and a Fourier representation of 1/r treated with the minimum image convention). It can convert the data to standard 1D lineplot.dat files which can be visualized with xmgrace, or 2Dplot.dat/3Dplot.dat files for higher dimensional data which can be visualized by gnuplot (via the casino plot 2D utility). • ptm: Manipulate pseudopotentials on radial grids or as Gaussian expansions. See documentation in ~/CASINO/utils/ptm/. • runvp: Utility to run a calculation using several workstations as if they formed a cluster (TCM only for the moment). • quad fit: Program for carrying out a quadratic fit to a set of data, in order to find a local extremum. Simply type quad fit and supply the code with the name of a file containing columns of data in the form x, y or x, y, δy. 118
• quickblock: Simple reblocking utility intended for analysing very large dmc.hist files (since it only looks at one column at a time). Alternative to reblock. quickblock allows reblocking of data other than the energy in the dmc.hist files. If a file called dmc.hist is present in the directory then quickblock will assume that you want to analyse the total energy in that file. Otherwise it will ask you for the name of the file (and the column of data) to analyse. • reblock: Perform statistical analysis and reblocking of QMC data in vmc.hist and dmc.hist. Use this! Information about the reblocking algorithm is given in Sec. 24. Further information can be found in the documentation in ~/CASINO/utils/reblock/. • runcrystal: Run script for carrying out crystal9x and crystal03/06/09 calculations. Its use is discussed in Sec. 8.4.2. • runqmc: General run script for carrying out casino calculations on any kind of computer. See Sec. 6.6. • runqmcmd: Script for carrying out QMC molecular dynamics calculations with casino and the pwscf program. Works by calling the runqmc and runpwscf scripts, ensuring that it can run on any kind of machine. See Sec. 6.7. • runpwscf: General run script for carrying out PWSCF calculations on any kind of computer. • tcm comps: Script for listing the jobs running on each of the computers in TCM (Cambridge interest only). • twistav castep: Script for carrying out twist averaging for real systems, using the castep plane-wave DFT code and the blip utility in conjunction with casino. See Sec. 28.3.3. • twistav pwscf: Script for carrying out twist averaging for real systems, using the pwscf planewave DFT code in conjunction with casino. See Sec. 28.3.4. • update hist: A utility for converting casino version 1 .hist files to casino version 2 .hist files (as if there might be anyone left who might want to do this). • envmc: Utility to extract VMC energies, energy components, standard errors and time taken from the standard output file. Examples of the use of envmc are given in Sec. 6.2 and Sec. 6.3.1. See ~/CASINO/utils/envmc/ for further information. Note that envmc is short for ‘VMC energy’ so it doesn’t work for DMC, OK? 11 Making movies with CASINO I think somebody did this once way back in the 20th century. And it was rubbish, but this is supposed to be a comprehensive manual. 11.1 How to make movies In the input file the following keywords control the movie-making process: # MOVIES makemovie : T #*! Make movie (Boolean) movieplot : 1 #*! Plot every * moves (Inte movienode : 0 #*! Processor to plot (Integer) moviecells : F #*! Plot nn cells (Boolean) Set the keyword makemovie to T to enable the movie-making facility. You could set movieplot to an integer greater than 1 so that the particle positions are only written out every movieplot moves. The processor which plots the particle positions are chosen by the keyword movienode, which has to be zero or a positive integer less than the total number of processors. If moviecells is set to F then the unit cell will be plotted, if set to T then nearest-neighbour cells in the (x, y)-plane will also be written. Type runqmc and an output file called movie.out will be produced. The format of the movie.out file is as follows: 119
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CASINO User’s Guide Version 2.13
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8.6 GAUSSIAN94/98/03/09 . . . . . .
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29.2 Fourier transformation of CASI
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1 Introduction casino is a computer
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3.2 Legal stuff casino is given awa
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- Grossman-Mitas DMC-DFT molecular
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Your defined setup can then be perm
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- : perform compilation (default).
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6 Introductory user’s guide: how
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ATOM BASIS TYPE The basis used to r
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ENVMC v0.60: Script to extract VMC
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Std. err. in the mean DMC energy (a
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Jastrow factor from each cycle of t
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V(x) Ψ init (x) τ{ t Ψ 0 (x) x T
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the energy becomes roughly constant
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many cores, time limits etc, which
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Set the verbosity level of the mach
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6.7 How to run coupled DFT-DMC mole
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unqmcmd --startqmc=M Start the chai
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config.out This is the name under w
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‘slater-type’: use Slater-type
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CUSTOM SPAIR DEP (Block) This input
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initial configurations come from DM
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DTDMC (Real) Time step for DMC run
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FORCES INFO (Integer) Controls the
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nucleus is assumed to lie at the or
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MOVIECELLS (Logical) If F then casi
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OPT MAXITER (Integer) Largest permi
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of G vectors and discards all those
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half a million cores, it may be des
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VM REWEIGHT (Logical) If vm reweigh
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default this is 0 hartree. It shoul
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A very detailed specification of th
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-1 0 0 1 1 1 1 1 1 1 0 2 1 0 1 2 Pa
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cusp conditions; otherwise, only th
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Detailed information about each of
Page 73 and 74: |k| (outermost). Hence one can spec
Page 75 and 76: large and the wave function is near
Page 77 and 78: R(i) in atomic units 0.000000000000
Page 79 and 80: 2. The charge-density Fourier coeff
Page 81 and 82: c_767: [ 996 ] ... Compressed expan
Page 83 and 84: valence charges for each atom %%%%%
Page 85 and 86: 1988). This can be found online. An
Page 87 and 88: 1.3813695578425E+00 1.3957621401173
Page 89 and 90: PWSCF Method: DFT DFT Functional: u
Page 91 and 92: 0.125203784849961E-01 0.13042462855
Page 93 and 94: 3.3000000000000E+00 2.0000000000000
Page 95 and 96: Potential Number of grid points 200
Page 97 and 98: 9. Clearly, the total number of pos
Page 99 and 100: EBEST (DMC only) Best estimate of t
Page 101 and 102: Use G-vector set 1 Number of sets 2
Page 103 and 104: 1000.0 rho_a(G)*rho_b(-G) 16.0 4.12
Page 105 and 106: total weight must always be include
Page 107 and 108: The exporter does not currently wor
Page 109 and 110: 8.4.2 Generating gwfn.data files wi
Page 111 and 112: After successfully running properti
Page 113 and 114: % mv Test.FChk dna.Fchk run gaussia
Page 115 and 116: • By default, gaussian uses spin
Page 117 and 118: Routine Purpose qmc write Writes th
Page 119 and 120: not the case the defaults can be ch
Page 121 and 122: 8.10 TURBOMOLE Website: www.turbomo
Page 123: • crysgen06/09, crystaltoqmc: The
Page 127 and 128: • In Movie Settings choose Trajec
Page 129 and 130: the move rejection probability is h
Page 131 and 132: This leads to the single-electron d
Page 133 and 134: In the UNR [19] scheme the modified
Page 135 and 136: 13.7 Evaluating expectation values
Page 137 and 138: Population-control catastrophes sho
Page 139 and 140: where u k has the periodicity of th
Page 141 and 142: Although the constraint equations a
Page 143 and 144: 18 Wave-function updating Consider
Page 145 and 146: 19.2 Evaluating the nonlocal pseudo
Page 147 and 148: of a unit point charge at r j in ev
Page 149 and 150: 19.4.3 1D Coulomb interaction Coulo
Page 151 and 152: To investigate whether the extrapol
Page 153 and 154: correlations, such as might be enco
Page 155 and 156: where n is the order of the expansi
Page 157 and 158: terms by definition, and it can be
Page 159 and 160: which is therefore independent of r
Page 161 and 162: where the local energy, E L , is E
Page 163 and 164: Another variant of variance minimiz
Page 165 and 166: The energy minimization method used
Page 167 and 168: valid. The first problem, which ari
Page 169 and 170: • Is emin min energy too high? Th
Page 171 and 172: It may be activated by setting vmc
Page 173 and 174: that the number of configuration mo
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• It is possible to use blip orbi
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0.5 0.5 0.0 particle 1 det 1 : 9 or
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The clearup twistav script can be u
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In the infinite system limit, the s
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Note that this has the k −2 diver
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• The effective time step, Eq. (3
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1 2 H He 1.00794 4.00260 3 4 5 6 7
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and the Dirac delta function is δ(
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33.2.2 Atomic densities K eywords:
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The spin-density matrix is a two-by
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33.3.3 Homogeneous and isotropic sy
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33.4 Structure factor and spherical
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33.5 One-body density matrix, two-b
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[ where the approximation ρ (1)T
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The figure shows the localization l
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with F HFT mix = − F P mix = −
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The input keyword to activate the c
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To each walker r j , we assign a li
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37 Magnetic fields and the fixed-ph
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38 Analysis of the performance of C
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the orbitals, α = 2 [11]. The use
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39.2 Implementation basics and perf
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• Use ‘endif’ and ‘enddo’
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• Evidence of testing on serial a
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B Appendix 2: Automatic testing of
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• Delete any eepot.data and densi
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* "Generic" CASINO_ARCHs are intend
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- ‘head -n 1 /etc/redhat-release
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for a single job in an ensemble of
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inary executable. CASINO does not r
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otherwise. The following tags are o
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[2] V.R. Saunders, R. Dovesi, C. Ro
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[50] W. Janke, Statistical Analysis
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CASINO manual - Theory of Condensed Matter

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