Thread by @fgrosshans

Now at #IWQNS, Kanupriya Sinha from @ArmyResearchLab and @JQInews on Tailoring fluctuation phenomena in nanophotonic systems: collective effects in Casimir-Polder forces & non-Markovian dynamics in atomic collective states
#LTQI

@ArmyResearchLab @JQInews Kanupriya Sinha; Casimir–Polder forces are important for integrated atom systems.
The interaction of a dipole at distance z of a mirror is U ∼ – ℏΓ₀/16(k₀z)³ : At z∼10 nm, U∼10 mK.
Where k₀ ← ω₀ (2 level split)
#LTQI #IWQNS

@ArmyResearchLab @JQInews Kanupriya Sinha looks at many ways to drive the interaction. #LTQI #IWQNS

@ArmyResearchLab @JQInews Kanupriya Sinha uses master equations to investigate how super/subradiant collective states influence the Casimir–Polder interaction. Super/sub radiant state increase/decrease the Casimir interaction.
Long live the dark state !
#LTQI #IWQNS

@ArmyResearchLab @JQInews @threadreaderapp Kindly unroll

@ArmyResearchLab @JQInews Kanupriya Sinha now moves on to non-Markovian effects. For superradiance, the Markov approximation fails, as show by a paradox involving two atoms seaparted by a distance between suprerradiance coherence length and independendent emission coherence length.$#LTQI #IWQNS

@ArmyResearchLab @JQInews KAnupriya Sinha uses a toy model of two atoms coupled to the same waveguide. It leads to icreased superradiance: superDUPERradiance

(Note: hyperradiance and ultraradiance are already taken)
#LTQI #IWQNS

@ArmyResearchLab @JQInews Kanuprya Sinha: on the other side, there is also subDUBradiance, where the two atoms make a kind of cavity, trapping the photon.
#IWQNS #LTQI