Created
April 27, 2011 23:34
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Python Quantum Computing simulator
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| from numpy import matrix | |
| from numpy import linalg | |
| import numpy | |
| import math | |
| import random | |
| class Qubit: | |
| def __init__(self, a, b): | |
| self.zero = complex(a) | |
| self.one = complex(b) | |
| def xgate(self): | |
| '''Apply a NOT (X) gate''' | |
| self.zero, self.one = self.one, self.zero | |
| return self | |
| def hgate(self): | |
| '''Apply a Hadamard gate''' | |
| h = matrix([[1, 1], [1, -1]]) * (1.0 / math.sqrt(2)) | |
| curr = matrix([[self.zero],[self.one]]) | |
| new = numpy.asarray(h * curr) | |
| self.zero = new[0][0] | |
| self.one = new[1][0] | |
| return self | |
| def measure(self): | |
| '''Measure the qubit in the computational basis''' | |
| zeroprob = abs(self.zero) ** 2 | |
| randomchoice = random.random() | |
| if randomchoice < zeroprob: | |
| self.zero = complex(1) | |
| self.one = complex(0) | |
| return 0 | |
| else: | |
| self.zero = complex(0) | |
| self.one = complex(1) | |
| return 1 | |
| def __repr__(self): | |
| return str(self.zero) + " |0> + " + str(self.one) + " |1>\n" | |
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