Talks by Flaminia Giacomini

Einstein's Equivalence principle for superpositions of gravitational fields

Flaminia Giacomini Perimeter Institute for Theoretical Physics

The Principle of Equivalence, stating that all laws of physics take their special-relativistic form in any local inertial frame, lies at the core of General Relativity. Because of its fundamental status, this principle could be a very powerful guide in formulating physical laws at regimes where both gravitational and quantum effects are relevant. However, its formulation implicitly presupposes that reference frames are abstracted from classical systems (rods and clocks) and that the spacetime background is well defined.

Quantum mechanics and the covariance of physical laws in quantum reference frames

Flaminia Giacomini Perimeter Institute for Theoretical Physics
In physics, every observation is made with respect to a frame of reference. Although reference frames are usually not considered as degrees of freedom, in all practical situations it is a physical system which constitutes a reference frame. Can a quantum system be considered as a reference frame and, if so, which description would it give of the world? Here, we introduce a general method to quantise reference frame transformations, which generalises the usual reference frame transformation to a “superposition of coordinate transformations”.

Quantum reference frames for space and time

Flaminia Giacomini Perimeter Institute for Theoretical Physics
In physics, every observation is made with respect to a frame of reference. Although reference frames are usually not considered as degrees of freedom, in all practical situations it is a physical system which constitutes a reference frame. Can a quantum system be considered as a reference frame and, if so, which description would it give of the world?

Quantum mechanics and the covariance of physical laws in quantum reference frames

Flaminia Giacomini Perimeter Institute for Theoretical Physics

In physics, every observation is made with respect to a frame of reference. Although reference frames are usually not considered as degrees of freedom, in all practical situations it is a physical system which constitutes a reference frame. Can a quantum system be considered as a reference frame and, if so, which description would it give of the world?