Outputs (19)

Hybrid coherent control of magnons in a ferromagnetic phononic resonator excited by laser pulses (2024)
Journal Article
Scherbakov, A. V., Carr, A. D., Linnik, T. L., Kukhtaruk, S. M., Armour, A. D., Nadzeyka, A., …Bayer, M. (2024). Hybrid coherent control of magnons in a ferromagnetic phononic resonator excited by laser pulses. Physical Review Research, 6(1), Article L012019. https://doi.org/10.1103/PhysRevResearch.6.L012019

We propose and demonstrate the concept of hybrid coherent control (CC) whereby a quantum or classical harmonic oscillator is excited by two excitations: one is quasiharmonic (i.e., harmonic with a finite lifetime) and the other is a pulsed broadband... Read More about Hybrid coherent control of magnons in a ferromagnetic phononic resonator excited by laser pulses.

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.

Defining the Semiclassical Limit of the Quantum Rabi Hamiltonian (2022)
Journal Article
Irish, E. K., & Armour, A. D. (2022). Defining the Semiclassical Limit of the Quantum Rabi Hamiltonian. Physical Review Letters, 129(18), Article 183603. https://doi.org/10.1103/PhysRevLett.129.183603

The crossover from quantum to semiclassical behavior in the seminal Rabi model of light-matter interaction still, surprisingly, lacks a complete and rigorous understanding. A formalism for deriving the semiclassical model directly from the quantum Ha... Read More about Defining the Semiclassical Limit of the Quantum Rabi Hamiltonian.

A macroscopic object passively cooled into its quantum ground state of motion beyond single-mode cooling (2021)
Journal Article
Cattiaux, D., Golokolenov, I., Kumar, S., Sillanpää, M., Mercier de Lépinay, L., Gazizulin, R. R., …Collin, E. (2021). A macroscopic object passively cooled into its quantum ground state of motion beyond single-mode cooling. Nature Communications, 12(1), Article 6182. https://doi.org/10.1038/s41467-021-26457-8

The nature of the quantum-to-classical crossover remains one of the most challenging open question of Science to date. In this respect, moving objects play a specific role. Pioneering experiments over the last few years have begun exploring quantum b... Read More about A macroscopic object passively cooled into its quantum ground state of motion beyond single-mode cooling.

Josephson photonics with simultaneous resonances (2021)
Journal Article
Wood, K., Armour, A. D., & Lang, B. (2021). Josephson photonics with simultaneous resonances. Physical Review B, 104(15), Article 155424. https://doi.org/10.1103/physrevb.104.155424

Inelastic Cooper pair tunneling across a voltage-biased Josephson junction in series with one or more microwave cavities can generate photons via resonant processes in which the energy lost by the Cooper pair matches that of the photon(s) produced. W... Read More about Josephson photonics with simultaneous resonances.

Quantum estimation of coupling strengths in driven-dissipative optomechanics (2021)
Journal Article
Sala, K., Doicin, T., Armour, A. D., & Tufarelli, T. (2021). Quantum estimation of coupling strengths in driven-dissipative optomechanics. Physical Review A, 104(3), Article 033508. https://doi.org/10.1103/PhysRevA.104.033508

We exploit local quantum estimation theory to investigate the measurement of linear (g1) and quadratic (g2) coupling strengths in a driven-dissipative optomechanical system in the red-sideband regime. We consider model parameters inspired by recent e... Read More about Quantum estimation of coupling strengths in driven-dissipative optomechanics.

Multi-Photon Resonances in Josephson Junction-Cavity Circuits (2021)
Journal Article
Lang, B., & Armour, A. (2021). Multi-Photon Resonances in Josephson Junction-Cavity Circuits. New Journal of Physics, 23(3), Article 033021. https://doi.org/10.1088/1367-2630/abe483

We explore the dissipative dynamics of nonlinearly driven oscillator systems tuned to resonances where multiple excitations are generated. Such systems are readily realised in circuit QED systems combining Josephson junctions with a microwave cavity... Read More about Multi-Photon Resonances in Josephson Junction-Cavity Circuits.

Beyond linear coupling in microwave optomechanics (2020)
Journal Article
Cattiaux, D., Zhou, X., Kumar, S., Golokolenov, I., Gazizulin, R. R., Luck, A., …Collin, E. (2020). Beyond linear coupling in microwave optomechanics. Physical Review Research, 2(3), Article 033480. https://doi.org/10.1103/physrevresearch.2.033480

We explore the nonlinear dynamics of a cavity optomechanical system. Our realization consisting of a drumhead nano-electro-mechanical resonator (NEMS) coupled to a microwave cavity, allows for a nearly ideal platform to study the nonlinearities arisi... Read More about Beyond linear coupling in microwave optomechanics.

Phase synchronization in coupled bistable oscillators (2020)
Journal Article
Jessop, M. R., Li, W., & Armour, A. D. (2020). Phase synchronization in coupled bistable oscillators. Physical Review Research, 2(1), Article 013233. https://doi.org/10.1103/physrevresearch.2.013233

We introduce a simple model system to study synchronization theoretically in quantum oscillators that are not just in limit-cycle states, but rather display a more complex bistable dynamics. Our oscillator model is purely dissipative, with a two-phot... Read More about Phase synchronization in coupled bistable oscillators.

Electronic and photonic counting statistics as probes of non-equilibrium quantum dynamics (2020)
Journal Article
Kubala, B., Ankerhold, J., & Armour, A. D. (2020). Electronic and photonic counting statistics as probes of non-equilibrium quantum dynamics. New Journal of Physics, 22(2), https://doi.org/10.1088/1367-2630/ab6eb0

© 2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. We analyse the full counting statistics (FCS) of photons flowing in and out of a microwave cavity coupled to a voltag... Read More about Electronic and photonic counting statistics as probes of non-equilibrium quantum dynamics.