61 citations · 161 across the 6 of their papers we have counts for
6 papers
Mechanical squeezing via unstable dynamics in a microcavity
Katja Kustura, Carlos Gonzalez-Ballestero, Andrés de los Ríos Sommer +3
We theoretically show that strong mechanical quantum squeezing in a linear optomechanical system can be rapidly generated through the dynamical instability reached in the far red-d…
Stability of a Magnetically Levitated Nanomagnet in Vacuum: Effects of Gas and Magnetization Damping
Katja Kustura, Vanessa Wachter, Adrián E. Rubio López +1
In the absence of dissipation a non-rotating magnetic nanoparticle can be stably levitated in a static magnetic field as a consequence of the spin origin of its magnetization. Here…
Effective quantum dynamics induced by a driven two-level-system bath
Katja Kustura, Oriol Romero-Isart, Carlos Gonzalez-Ballestero
We derive a Born-Markov master equation describing the dissipation induced by a bath of lossy but coherently driven two-level systems (TLS) coupled to a bosonic system via Jaynes-C…
Acoustic and Optical Properties of a Fast Spinning Dielectric Nanoparticle
Daniel Hümmer, René Lampert, Katja Kustura +3
Nanoparticles levitated in vacuum can be set to spin at ultimate frequencies, limited only by the tensile strength of the material. At such high frequencies, drastic changes to the…
Quadratic Quantum Hamiltonians: General Canonical Transformation to a Normal Form
Katja Kustura, Cosimo C. Rusconi, Oriol Romero-Isart
A system of linearly coupled quantum harmonic oscillators can be diagonalized when the system is dynamically stable using a Bogoliubov canonical transformation. However, this is ju…
Quantum Spin Stabilized Magnetic Levitation
Cosimo C. Rusconi, Vera Pöchhacker, Katja Kustura +2
We theoretically show that, despite Earnshaw's theorem, a non-rotating single magnetic domain nanoparticle can be stably levitated in an external static magnetic field. The stabili…