has 23 physics based positions advertised at the moment. Where exactly are you in Switzerland - because your location still says Germany.
Also get someone to look at your CV and make sure it's suitable for the Swiss market. My OH found changing his CV helped to get more responses.
It will take time. Even experienced specialists are finding it difficult to get a new position quickly so if you've only just finished your studies it could take even longer. And the Swiss aren't always quick when it comes to making decisions on employment.