Teleportation and a Quantum Repeater Using Entanglement Swapping

entanglement-qutip.ipynb

Teleportation and entanglement swapping using the Quantum Toolkit in Python (QuTiP) (YouTube video at https://youtu.be/M7GUkuM2vBk )

qnet_teleportation.py

Using the qalgebra system to demonstration teleportation using computer algebra rather than numerical calculation.

ent_swap_algebra.py

Use symbolic computation (computer algebra) to determine which gates to apply in qalgebra_entanglement_swapping.py

qalgebra_entanglement_swapping.py

Like in a quantum repeater, using computer algebra rather than multiplying matrices of numbers

qnet_requirements.lst

The pip requirements for usign qabebra and qnet

qutip_teleportation.py

Simulates and demonstrates teleportation

qutip_teleportation_nondeterministic

The qutip library function "measure_observable" is used to simulate a Bell measurement, and returns a nonzero probability, with the associted projected state, if the particle was measured to be in the pre-specified state. The outcome of this function call is nondeterministic.

qutip_entanglement_swapping.py

Simulates and demonstrates entanglement swapping

physical_simulation_utilities.py

Function same_state() returns True if both arguments represent the same state (up to a phase factor)

physical-simulation-requirements.lst

I use numpy version 1.18 because the latest version is incompatible with qutip

entanglement_sympy.ipynb

Telepeortation and quantum repeaters using entanglment. Jupyter notebook. Stands alone except for dependency on numpy, scipy and sympy.