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updated libquantum 0.9.1 source files

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libquantum
2016-10-27 04:23:16 +09:00
parent e742b26967
commit 7091733a35
49 changed files with 4820 additions and 3255 deletions
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31
decoherence.c
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@@ -6,7 +6,7 @@
libquantum is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License,
by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
libquantum is distributed in the hope that it will be useful, but
@@ -16,8 +16,8 @@
You should have received a copy of the GNU General Public License
along with libquantum; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA
*/
@@ -29,21 +29,22 @@
#include "qureg.h"
#include "gates.h"
#include "complex.h"
#include "error.h"
/* Status of the decoherence simulation. Non-zero means enabled and
decoherence effects will be simulated. */
int status = 0;
int quantum_status = 0;
/* Decoherence parameter. The higher the value, the greater the
decoherence impact. */
float lambda = 0;
float quantum_lambda = 0;
float
quantum_get_decoherence()
{
return lambda;
return quantum_lambda;
}
/* Initialize the decoherence simulation and set the decoherence
@@ -54,11 +55,11 @@ quantum_set_decoherence(float l)
{
if(l)
{
status = 1;
lambda = l;
quantum_status = 1;
quantum_lambda = l;
}
else
status = 0;
quantum_status = 0;
}
/* Perform the actual decoherence of a quantum register for a single
@@ -77,16 +78,14 @@ quantum_decohere(quantum_reg *reg)
quantum_gate_counter(1);
if(status)
if(quantum_status)
{
nrands = calloc(reg->width, sizeof(float));
if(!nrands)
{
printf("Not enough memory for %i-sized array of float!\n",
reg->width);
exit(1);
}
quantum_error(QUANTUM_ENOMEM);
quantum_memman(reg->width * sizeof(float));
for(i=0; i<reg->width; i++)
@@ -101,7 +100,7 @@ quantum_decohere(quantum_reg *reg)
x = u * sqrt(-2 * log(s) / s);
x *= sqrt(2 * lambda);
x *= sqrt(2 * quantum_lambda);
nrands[i] = x/2;
}