Wildqat Python SDK

Python Framework for QUBO

Version

1.0.0

Install

$ pip3 install wildqat

or

$ git clone https://github.com/mdrft/Wildqat.git
$ python setup.py install

Example

import wildqat as wq
a = wq.opt()
a.qubo = [[4,-4,-4],[0,4,-4],[0,0,4]]
a.sa() #=> [1, 1, 1]
print(a.E[-1]) #=>[0.0]

Parameters

Some parameters for simualtion is adjustable

#for sa
a.Ts  = 10    #default 5
a.R   = 0.99  #default 0.95
a.ite = 10000 #default 1000

#for sqa
a.Gs  = 100   #default 10

Energy Function

Energy function of the calculation is stored in attribute E as an array.

print(a.E[-1]) #=>[0.0]

#if you want to check the time evolution
a.plot()

Universal Gate Model Operator

It is convertible to the universal gate model pauli operator for qaoa simulations

wq.pauli(wq.sel(2,1))
# => -0.5*I + 0.5*Z[0]*Z[1]

With blueqat, you can easily simulate combinatorial optimization problem on Universal Gate Model link:Blueqat

import wildqat as wq
from blueqat import vqe

qubo = wq.pauli(wq.sel(4,1))
step = 4
result = vqe.Vqe(vqe.QaoaAnsatz(qubo,step)).run()
print(result.most_common(5))

# => (((0, 0, 1, 0), 0.24650337773427797), ((1, 0, 0, 0), 0.24650337773427794), ((0, 0, 0, 1), 0.24650337773427788), ((0, 1, 0, 0), 0.24650337773427783), ((0, 0, 0, 0), 0.0034271782738342416))

Functions

sel(N,K,array)
Automatically create QUBO which select K qubits from N qubits

print(wq.sel(5,2))
#=>
[[-3  2  2  2  2]
 [ 0 -3  2  2  2]
 [ 0  0 -3  2  2]
 [ 0  0  0 -3  2]
 [ 0  0  0  0 -3]]

if you set array on the 3rd params, the result likely to choose the nth qubit in the array

print(wq.sel(5,2,[0,2]))
#=>
[[-3.5  2.   2.   2.   2. ]
 [ 0.  -3.   2.   2.   2. ]
 [ 0.   0.  -3.5  2.   2. ]
 [ 0.   0.   0.  -3.   2. ]
 [ 0.   0.   0.   0.  -3. ]]

net(arr,N)
Automatically create QUBO which has value 1 for all connectivity defined by array of edges and graph size N

print(wq.net([[0,1],[1,2]],4))
#=>
[[0. 1. 0. 0.]
 [0. 0. 1. 0.]
 [0. 0. 0. 0.]
 [0. 0. 0. 0.]]

this create 4*4 QUBO and put value 1 on connection between 0th and 1st qubit, 1st and 2nd qubit

zeros(N) Create QUBO with all element value as 0

print(wq.zeros(3))
#=>
[[0. 0. 0.]
 [0. 0. 0.]
 [0. 0. 0.]]

diag(list) Create QUBO with diag from list

print(wq.diag([1,2,1]))
#=>
[[1 0 0]
 [0 2 0]
 [0 0 1]]

Document

English
https://wildqat.readthedocs.io/en/latest/

日本語
https://wildqat.readthedocs.io/ja/latest/

Tutorial

English
https://github.com/mdrft/Wildqat/tree/master/examples_en

日本語
https://github.com/mdrft/Wildqat/tree/master/examples_ja

Authors

Yuichiro Minato(MDR), Asa Eagle(MDR), Satoshi Takezawa(TerraSky), Seiya Sugo(TerraSky)

Disclaimer

Copyright 2018 The Wildqat Developers.