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Reflection by two level system: phase singularities on the Poincaré hypersphere (2023)
Journal Article
Lang, B., Harbord, E., & Oulton, R. (2023). Reflection by two level system: phase singularities on the Poincaré hypersphere. Journal of Optics, 25(12), Article 125403. https://doi.org/10.1088/2040-8986/ad065a

We consider the reflection of a photon by a two-level system in a quasi-one-dimensional waveguide. The waveguide polarisation at the location of the two-level system and the transition dipole are key determinants of the physics, controlling of the ph... Read More about Reflection by two level system: phase singularities on the Poincaré hypersphere.

Discrete time translation symmetry breaking in a Josephson junction laser (2023)
Journal Article
Lang, B., Morley, G. F., & Armour, A. D. (2023). Discrete time translation symmetry breaking in a Josephson junction laser. Physical review B: Condensed matter and materials physics, 107(14), Article 144509. https://doi.org/10.1103/PhysRevB.107.144509

A Josephson junction laser is realized when a microwave cavity is driven by a voltage-biased Josephson junction. Through the ac Josephson effect, a dc voltage generates a periodic drive that acts on the cavity and generates interactions between its m... Read More about Discrete time translation symmetry breaking in a Josephson junction laser.