qympy 1.0.4

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Qympy - Quantum Analytic Computation with Sympy

A sympy based python package for symbolic calculation of $n$-qubit quantum state. See GitHub: https://github.com/r08222011/Qympy

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Get Started

1. Circuit Initialization Common circuits ansatz can be found in /src/qympy/quantum_circuit. To build a circuit from beginning, use sp_circuit.Circuit. The basic use of Circuit is same as Qiskit. For example:

>>> from sp_circuit import Circuit

>>> num_qubits = 2  # Number of qubits in the circuit
>>> qc = Circuit(2) # Initialize a two-qubit circuit
>>> qc.h(0)         # Apply Hadamard Gate at qubit 0
>>> qc.cx(0,1)      # Apply CNOT gate with control 0 and target 1

1. Draw the circuit We now have initialized a quantum circuit. To see the circuit we built, we can use Circuit.draw(). This method use qiskit.circuit.QuantumCircuit.draw with draw('mpl') as default. For example:

>>> qc.draw("mpl")

1. Evolve and measure the circuit The last step for getting the analytic expression is to call the method Circuit.evolve_state(). This will calculate the final state with the gates applied. After evolving the quantum state, we can measure the quantum state with X, Y, Z basis with a single certain qubit. For example:

>>> qc.evolve_state()
>>> qc.measure(0, "X")
>>> sp.latex(qc.measure(0, "X"))
'2 \\sin{\\left(\\frac{t_{0}}{2} \\right)} \\cos{\\left(\\frac{t_{0}}{2} \\right)}'

Note, you can see the prettier expression with jupyter.

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License

MIT License

Copyright (c) 2022 Yi-An Chen

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.