2026 CAP Congress / Congrès de l'ACP 2026

Session

(DAMOPC) R2-3 | (DPAMPC)

R2-3

25 Jun 2026, 16:15

U. Ottawa - Learning Crossroads (CRX) Building

750. High Precision Theory and Experiment for the Rydberg P-States of Helium up to n = 35

Dr Aaron Bondy (Drake University), Gordon Drake (University of Windsor)

25/06/2026, 16:15

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

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

High precision variational calculations in Hylleraas coordinates are presented for all singlet and triplet $P$-states of helium up to principal quantum number $n = 35$ with a uniform accuracy of 1 part in $10^{22}$ for the nonrelativistic energy. Mass polarization, relativistic and quantum electrodynamic effects are included to achieve a final accuracy of $\pm$1 kHz or better for the...

761. Amplitude squeezing with pulsed second harmonic generation

Peter Rose (University of Ottawa)

25/06/2026, 16:30

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

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

We introduce a novel computational method for simulating amplitude squeezing in an optical parametric amplifier (OPA), allowing us to include some of the quantum properties of the pump pulse. The theoretical treatment of squeezing in an OPA is usually performed by assuming that the pump pulse is classical and unchanging, with some methods including the effects of changing pump pulse amplitude....

663. Large Momentum Diffusion from the Dipole Force of Travelling Waves

Louis Marmet (York University)

25/06/2026, 16:45

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

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

In the presence of a resonant light field, atoms of a gas spontaneously scatter photons in random directions, leading to a momentum diffusion $D$ that causes the temperature to increase at a rate proportional to the spontaneous emission rate. When light is detuned from the atomic resonance by a frequency $\Delta$, the scattering rate decreases rapidly resulting in $D_A \propto 1/\Delta^2$. ...

813. Pure and Mixed State Entanglement Dynamics in Tavis–Cummings Model with Squeezed Coherent Thermal States

Kous Mandal (University of Windsor)

25/06/2026, 17:00

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

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

We investigate how environmental noise and atomic state purity jointly shape entanglement dynamics in a two-atom cavity QED system described by the single-mode Tavis–Cummings model. The atoms are initially prepared either in maximally entangled Bell states or in mixed Werner states, while the cavity field is modeled by generalized single-mode squeezed coherent thermal states, allowing thermal...

890. Quantum dark bands and dynamical phase transitions

Dr Duncan O'Dell (McMaster University)

25/06/2026, 17:15

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

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

Traditionally, phase transitions are considered in equilibrium. However, over the past decade there has been considerable interest in non-equilibrium or dynamical phase transitions (DPTs) where time plays the role of the control parameter and the transition happens at a critical time. DPTs have been primarily studied in the context of quantum many-body systems, including in experiments on cold...