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Wrap os.path functions in method calls...
Wrap os.path functions in method calls Some functions from os.path are now references to C functions (e.g. isdir on Windows). This breaks the path module, because compiled functions do not get bound to an object instance. All os.path functions have been wrapped in method calls, out of general caution. Closes gh-737

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dense_coding.ipynb
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Dense Coding

In [2]:
%load_ext sympyprinting
In [3]:
from sympy import sqrt, symbols, Rational
from sympy import expand, Eq, Symbol, simplify, exp, sin
from sympy.physics.quantum import *
from sympy.physics.quantum.qubit import *
from sympy.physics.quantum.gate import *
from sympy.physics.quantum.grover import *
from sympy.physics.quantum.qft import QFT, IQFT, Fourier
from sympy.physics.quantum.circuitplot import circuit_plot
In [4]:
psi = Qubit('00')/sqrt(2) + Qubit('11')/sqrt(2); psi
Out[4]:
$$\frac{1}{2} \sqrt{2} {\left|00\right\rangle } + \frac{1}{2} \sqrt{2} {\left|11\right\rangle }$$
In [5]:
circuits = [H(1)*CNOT(1,0), H(1)*CNOT(1,0)*X(1), H(1)*CNOT(1,0)*Z(1), H(1)*CNOT(1,0)*Z(1)*X(1)]
In [6]:
for circuit in circuits:
    circuit_plot(circuit, nqubits=2)
    display(Eq(circuit*psi,qapply(circuit*psi)))
$$H_{1} CNOT_{1,0} \left(\frac{1}{2} \sqrt{2} {\left|00\right\rangle } + \frac{1}{2} \sqrt{2} {\left|11\right\rangle }\right) = {\left|00\right\rangle }$$
$$H_{1} CNOT_{1,0} X_{1} \left(\frac{1}{2} \sqrt{2} {\left|00\right\rangle } + \frac{1}{2} \sqrt{2} {\left|11\right\rangle }\right) = {\left|01\right\rangle }$$
$$H_{1} CNOT_{1,0} Z_{1} \left(\frac{1}{2} \sqrt{2} {\left|00\right\rangle } + \frac{1}{2} \sqrt{2} {\left|11\right\rangle }\right) = {\left|10\right\rangle }$$
$$H_{1} CNOT_{1,0} Z_{1} X_{1} \left(\frac{1}{2} \sqrt{2} {\left|00\right\rangle } + \frac{1}{2} \sqrt{2} {\left|11\right\rangle }\right) = {\left|11\right\rangle }$$
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