Hello,
Since nobody replied, I repead the message below. Additional informations on the error
again similar output
quote:
q = -0 state1 = 0 state2 = 0 bond_type = 0
zero matrix element in remove_jump
application called MPI_Abort(MPI_COMM_WORLD, -2) - process 35
real 64m34.498s
end quote
Observation: The error seems to appear more frequently for lower temperatures.
Any suggestions PLEASE?
Best Kuba
>
> Hello,
>
> Sometimes QMC worm code (used on Bose-Hubbard) terminates with the
> following error:
>
> here come first earlier succesful simulations then
> ...
> Created run 85 remote on Host ID: 84
> Created run 86 remote on Host ID: 85
> Created run 87 remote on Host ID: 86
> Created run 88 remote on Host ID: 87
> All processes have been assigned
> Checking if Simulation 1 is finished: not yet, next check in 120
> seconds ( 0% done).
> q = -0 state1 = 0 state2 = 0 bond_type = 0
> zero matrix element in remove_jump
> application called MPI_Abort(MPI_COMM_WORLD, -2) - process 67
>
> Could somebody advice what I can do?
>
> Best regards Kuba
>
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 12 May 2009 08:15:27 -0700 (PDT)
> From: khalid hassan <mkhloane(a)yahoo.com>
> Subject: [ALPS-users] correct basis vector
> To: alps users alps users <comp-phys-alps-users(a)phys.ethz.ch>
> Message-ID: <193974.13413.qm(a)web59404.mail.ac4.yahoo.com>
> Content-Type: text/plain; charset=us-ascii
>
>
> Dear alps team
>
> I am using the print_numeric program in the model directory to print
> the basis vectors and hamiltonian matrices for the fermionic hubbard model.
>
> Now the problem is that the basis gives the specified combination but
> not the correct sign.
>
> for example for 2 site hubbard model one up spin, one down spin it gives
>
> {
> [ |0 0 > |1 1 > ]
> [ |0 1 > |1 0 > ]
> [ |1 0 > |0 1 > ]
> [ |1 1 > |0 0 > ]
> }
>
> now the 2nd and 3rd row should have opposite sign either 2nd -ve or
> 3rd negative according to convention.
>
> Now based on this set it calculated the matrix
>
> [4,4]((0,1,-1,0),(1,0,0,1),(-1,0,0,-1),(0,1,-1,0))
>
> which is wrong as all terms are negative. so I cannot find correct
> eigen values from this matrix.
>
> tell me how can I solve the problem with sign problem of basis states
> and find correct hamiltonian matrix
>
> Best regards
> khalid loane
>
>
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Tue, 12 May 2009 18:49:19 -0700
> From: "Adrian E. Feiguin" <afeiguin(a)kitp.ucsb.edu>
> Subject: Re: [ALPS-users] problem with DMRG of ALPS
> To: comp-phys-alps-users(a)phys.ethz.ch
> Message-ID: <4A0A271F.50302(a)kitp.ucsb.edu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi Gang,
>
> Could you figure out what the problem was? I just recompiled using the
>
> latest ALPS, and boost versions in the repository, and everything
> works
> just fine...
>
> Saludos,
> <ADRIAN>
>
> Gang Chen wrote:
>
> > Hi all,
> >
> > I installed alps-1.3.4 with the latest boost 1.38 on my local
> Laptop.
> > All the functions (e.g classical MC, fulldiag) all work fine except
> DMRG.
> >
> > When I try to run dmrg parm file in the tutorial, the job got
> aborted
> > right after it started.
> >
> > Has anyone had similar problem with DMRG?
> >
> > best,
> >
> > --
> > GANG CHEN
> > Department of Physics
> > University of California
> > Santa Barbara, CA 93106
> > Office: Broida 6216
> > Phone: 805-893-5260
> > Fax: 805-893-3378
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Tue, 12 May 2009 18:19:35 -1000
> From: Matthias Troyer <troyer(a)phys.ethz.ch>
> Subject: Re: [ALPS-users] correct basis vector
> To: comp-phys-alps-users(a)phys.ethz.ch
> Message-ID: <A4346807-7F3D-488C-8F52-BC22DB0DA584(a)phys.ethz.ch>
> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
>
>
> On May 12, 2009, at 5:15 AM, khalid hassan wrote:
>
> >
> > Dear alps team
> >
> > I am using the print_numeric program in the model directory to print
>
> > the basis vectors and hamiltonian matrices for the fermionic hubbard
>
> > model.
> >
> > Now the problem is that the basis gives the specified combination
> > but not the correct sign.
> >
> > for example for 2 site hubbard model one up spin, one down spin it
>
> > gives
> >
> > {
> > [ |0 0 > |1 1 > ]
> > [ |0 1 > |1 0 > ]
> > [ |1 0 > |0 1 > ]
> > [ |1 1 > |0 0 > ]
> > }
> >
> > now the 2nd and 3rd row should have opposite sign either 2nd -ve or
>
> > 3rd negative according to convention.
>
> Why should a basis vector have a negative sign? You can choose any
> basis you want, and above is our choice.
> >
> >
> > Now based on this set it calculated the matrix
> >
> > [4,4]((0,1,-1,0),(1,0,0,1),(-1,0,0,-1),(0,1,-1,0))
> >
> > which is wrong as all terms are negative. so I cannot find correct
>
> > eigen values from this matrix.
>
> In above matrix not all terms are negative, and they should not all be
>
> negative, since there is a + sign when you exchange two fermions.
> >
> >
> > tell me how can I solve the problem with sign problem of basis
> > states and find correct hamiltonian matrix
>
>
> Can you please clarify what the problem is?
>
> Matthias
>
>
>
> ------------------------------
>
> Message: 5
> Date: Tue, 12 May 2009 18:23:08 -1000
> From: Matthias Troyer <troyer(a)phys.ethz.ch>
> Subject: Re: [ALPS-users] correct basis vector
> To: comp-phys-alps-users(a)phys.ethz.ch
> Message-ID: <781EFF9A-7F01-4FF1-9E62-55D236B19938(a)phys.ethz.ch>
> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
>
>
> On May 12, 2009, at 5:15 AM, khalid hassan wrote:
>
> >
> > Dear alps team
> >
> > I am using the print_numeric program in the model directory to print
>
> > the basis vectors and hamiltonian matrices for the fermionic hubbard
>
> > model.
> >
> > Now the problem is that the basis gives the specified combination
> > but not the correct sign.
> >
> > for example for 2 site hubbard model one up spin, one down spin it
>
> > gives
> >
> > {
> > [ |0 0 > |1 1 > ]
> > [ |0 1 > |1 0 > ]
> > [ |1 0 > |0 1 > ]
> > [ |1 1 > |0 0 > ]
> > }
> >
> > now the 2nd and 3rd row should have opposite sign either 2nd -ve or
>
> > 3rd negative according to convention.
>
> Why should a basis vector have a negative sign? You can choose any
> basis you want, and above is our choice.
> >
> >
> > Now based on this set it calculated the matrix
> >
> > [4,4]((0,1,-1,0),(1,0,0,1),(-1,0,0,-1),(0,1,-1,0))
> >
> > which is wrong as all terms are negative. so I cannot find correct
>
> > eigen values from this matrix.
>
> In above matrix not all terms are negative, and they should not all be
>
> negative, since there is a + sign when you exchange two fermions.
> >
> >
> > tell me how can I solve the problem with sign problem of basis
> > states and find correct hamiltonian matrix
>
>
> Can you please clarify what the problem is?
>
> Matthias
>
>
>
> End of Comp-phys-alps-users Digest, Vol 38, Issue 4
> ***************************************************