Niklas Engelhardt Önne

Contact

Name and title: Niklas Engelhardt Önne

ORCID0009-0007-3540-4135 Länk till annan webbplats.

Workplace: Nordic Institute for Theoretical Physics (NORDITA) Länk till annan webbplats.

Visiting address Room 6115 i Hus 3Roslagstullsbacken 21

Postal address Fysikum106 91 Stockholm

Research group

Quantum Dynamics and Sensing Theory Group

Our research group explores how quantum systems behave and interact, and how their quantum dynamics can be harnessed for precision sensing and tests of new fundamental theories of physics.

About me

I am a PhD student in the theory group of Sofia Qvarfort working on the interplay of gravity with low-energy quantum systems. Specifically, my research is concerned with how large-mass systems in the quantum regime couple to gravity, be it via mass-energy equivalence, time dilation effects or other phenomena. Making use of both fundamental theory and effective models, I try to answer questions such as:

  • What is the gravitational field sourced by a massive quantum system in superposition?
  • How can quantum states of large-mass systems be created (c.f. Schrödinger's cat)?
  • What must change in the classical description of general relativity to accommodate quantum features of source masses?

Feel free to contact me if you have any questions related to physics, PhD studies, or teaching!


My current research involves projects in the following areas:

  • Preparation of Schrödinger cat states with optomechanics
  • Quantum gravity signatures in nuclear clocks*
  • The role of mass in relativity and mass-energy equivalence in the presence of external potentials*

 

*Collaboration with the group of Igor Pikovski at Stevens Institute of Technology.


Contact

Name and title: Niklas Engelhardt Önne

ORCID0009-0007-3540-4135 Länk till annan webbplats.

Workplace: Nordic Institute for Theoretical Physics (NORDITA) Länk till annan webbplats.

Visiting address Room 6115 i Hus 3Roslagstullsbacken 21

Postal address Fysikum106 91 Stockholm

Research group

Quantum Dynamics and Sensing Theory Group

Our research group explores how quantum systems behave and interact, and how their quantum dynamics can be harnessed for precision sensing and tests of new fundamental theories of physics.