updates to readme

}

```

To compile this with QCOR targeting the TNQVM simulator, run the following

To compile this with QCOR targeting a Rigetti QCS QPU, run the following

```bash

$ qcor -o deuteron -a tnqvm deuteron.cpp

$ qcor -o deuteron -a qcs:Aspen-4-4Q-A deuteron.cpp

```

This will create the ```deuteron``` quantum-classical binary executable.

Now just run