2025 CAP Congress / Congrès de l'ACP 2025

Session

(DTP) M1-7 Quantum Systems I | Systèmes quantiques I (DPT)

M1-7

9 Jun 2025, 10:15

Conveners

(DTP) M1-7 Quantum Systems I | Systèmes quantiques I (DPT)

• Ivan Booth

134. Quantum catastrophes

Dr Duncan O'Dell (McMaster University)

09/06/2025, 11:00

Theoretical Physics / Physique théorique (DTP-DPT)

Invited Speaker / Conférencier(ère) invité(e)

Caustics are singularities arising from wave focusing. Examples include rainbows, gravitational lensing, and freak waves. The natural mathematical language for describing caustics is catastrophe theory which predicts that caustics take on certain universal shapes. When applied to classical waves one finds that the singularities seen at large scales are replaced at short scales by smooth...

9. Ultrastrong coupling, nonselective measurement and quantum Zeno dynamics

Marco Merkli

09/06/2025, 11:30

Theoretical Physics / Physique théorique (DTP-DPT)

Oral (Non-Student) / Orale (non-étudiant(e))

We study the dynamics of an open quantum system linearly coupled to a bosonic reservoir. We show that, in the ultrastrong coupling limit, the system undergoes a nonselective measurement and then evolves unitarily according to an effective Zeno Hamiltonian. This dynamical process is largely independent of the reservoir state. We examine the entanglement breaking effect of the ultrastrong...

187. Form-preserving transformations of wave and Wigner functions

Prof. Mark Walton (University of Lethbridge)

09/06/2025, 11:45

Theoretical Physics / Physique théorique (DTP-DPT)

Oral (Non-Student) / Orale (non-étudiant(e))

Solutions of the time-dependent Schrödinger equation are mapped to other solutions for a (possibly) different potential by so-called form-preserving transformations. These time-dependent transformations of the space and time coordinates can produce remarkable solutions with surprising properties. A classic example is the force-free accelerating Airy beam found by Berry and Balazs. We review...