Benedetta Flebus
YOU?
Author Swipe
Coupling Magnons to an Opto-Electronic Parametric Oscillator Open
Hybrid magnonic systems have emerged as versatile modular components for quantum signal transduction and sensing applications owing to their capability of connecting distinct quantum platforms. To date, the majority of the magnonic systems…
Engineering long-lived entanglement through dissipation in quantum hybrid solid-state platforms Open
Spin squeezing, a form of many-body entanglement, is a crucial resource in quantum metrology and information processing. While experimentally viable protocols for generating stable spin squeezing have been proposed in quantum optics setups…
Generating single- and many-body quantum magnonic states Open
The growing interest in quantum magnonics is driving the development of advanced techniques for generating, controlling, and detecting non-classical magnonic states. Here, we explore the potential of an ensemble of solid-state spin defects…
Angular Momentum Fluctuations in the Phonon Vacuum of Symmetric Crystals Open
Although time-reversal and inversion symmetry constrain the angular momentum of each phonon mode to vanish, we show that the vacuum state of crystals with such symmetries can nevertheless exhibit finite angular momentum fluctuations, {whic…
Investigating the dependence of the biquadratic exchange interaction on extrinsic factors in permalloy–ruthenium synthetic antiferromagnets Open
In this work, we extract the temperature-dependent bilinear J1 and biquadratic J2 exchange energy densities in permalloy–ruthenium-based synthetic antiferromagnet bilayers, trilayers, and tetralayers. In our samples, the ruthenium interlay…
Engineering long-lived entanglement through dissipation in quantum hybrid solid-state platforms Open
Spin squeezing, a form of many-body entanglement, is a crucial resource in quantum metrology and information processing. While experimentally viable protocols for generating stable spin squeezing have been proposed in quantum optics setups…
Cooperative non-reciprocal emission and quantum sensing of symmetry breaking Open
Non-reciprocal propagation of energy and information is fundamental to a wide range of quantum technology applications. In this work, we explore the quantum many-body dynamics of a qubit ensemble coupled to a shared bath that mediates cohe…
Even-odd-layer-dependent symmetry breaking in synthetic antiferromagnets Open
In this work we examine synthetic antiferromagnetic structures consisting of two, three, and four antiferromagnetic coupled layers, i.e. bilayers, trilayers, and tetralayers. We vary the thickness of the ferromagnetic layers across all str…
The role of excitation vector fields and all-polarisation state control of cavity magnonics Open
Recently the field of cavity magnonics, a field focused on controlling the interaction between magnons and confined microwave photons within microwave resonators, has drawn significant attention as it offers a platform for enabling advance…
Magnetic structure of EuCd$_2$Sb$_2$ single-crystal thin-film Open
We investigate the magnetic order in single crystalline EuCd$_2$Sb$_2$ thin films using a combined theoretical and experimental approach. Resonant elastic x-ray scattering experiments reveal a sharp magnetic peak at $q = (0, 0, \frac{1}{2}…
Magnon-photon coupling in an opto-electro-magnonic oscillator Open
The opto-electronic oscillators (OEOs) hosting self-sustained oscillations by a time-delayed mechanism are of particular interest in long-haul signal transmission and processing. On the other hand, owing to their unique tunability and comp…
View article: The 2024 magnonics roadmap
The 2024 magnonics roadmap Open
Magnonics is a research field that has gained an increasing interest in both the fundamental and applied sciences in recent years. This field aims to explore and functionalize collective spin excitations in magnetically ordered materials f…
Oscillatory edge modes in two dimensional spin-torque oscillator arrays Open
Spin-torque oscillators (STOs) are dissipative magnetic systems that provide a natural platform for exploring non-Hermitian phenomena. We theoretically study a two-dimensional (2D) array of STOs and show that its dynamics can be mapped to …
View article: Magnon-Photon Coupling in an Opto-Electro-Magnonic Oscillator
Magnon-Photon Coupling in an Opto-Electro-Magnonic Oscillator Open
The opto-electronic oscillators (OEOs) hosting self-sustained oscillations by a time delayed mechanism are of particular interest in long-haul signal transmission and processing. On the other hand, owing to their unique tunability and comp…
Phonon Hall Viscosity of Ionic Crystals Open
When time-reversal symmetry is broken, the low-energy description of acoustic lattice dynamics allows for a dissipationless component of the viscosity tensor, the phonon Hall viscosity, which captures how phonon chirality grows with the wa…
Solid-state platform for cooperative quantum dynamics driven by correlated emission Open
While traditionally regarded as an obstacle to quantum coherence, recent breakthroughs in quantum optics have shown that the dissipative interaction of a qubit with its environment can be leveraged to protect quantum states and synthesize …
Layer-Dependent Magnetism and Spin Fluctuations in Atomically Thin van der Waals Magnet CrPS<sub>4</sub> Open
van der Waals (vdW) magnets, an emerging family of two-dimensional (2D) materials, have received tremendous attention due to their rich fundamental physics and significant potential for cutting-edge technological applications. In contrast …
Layer-dependent magnetism and spin fluctuations in atomically thin van der Waals magnet CrPS4 Open
van der Waals (vdW) magnets, an emerging family of two-dimensional (2D) materials, have received tremendous attention due to their rich fundamental physics and significant potential for cutting-edge technological applications. In contrast …
Even-Odd-Layer-Dependent Symmetry Breaking in Synthetic Antiferromagnets Open
In this work we examine synthetic antiferromagnetic structures consisting of two, three, and four antiferromagnetic coupled layers, i.e., bilayers, trilayers, and tetralayers. We vary the thickness of the ferromagnetic layers across all st…
Non-Hermitian and Liouvillian skin effects in magnetic systems Open
The non-Hermitian skin effect (NHSE) has emerged as a hallmark of non-Hermitian physics, with far-reaching implications for transport, topology, and sensing. While recent works have uncovered the NHSE in magnetic systems, these analyses re…
Oscillatory Edge Modes in Two Dimensional Spin-Torque Oscillator Arrays Open
Spin torque oscillators (STOs) are dissipative magnetic systems that provide a natural platform for exploring non-Hermitian phenomena. We theoretically study a two-dimensional (2d) array of STOs and show that its dynamics can be mapped to …
Recent advances in magnonics Open
Magnonics is an exciting and rapidly growing field revolving around the study and manipulation of magnons, the low-lying collective excitations of magnetically ordered systems. This field has emerged in response to both fundamental physics…
Magnon-magnon interactions induced by spin pumping-driven symmetry breaking in synthetic antiferromagnets Open
The richness in both the dispersion and energy of antiferromagnetic magnons has spurred the magnetism community to consider antiferromagnets for future spintronic/magnonic applications. However, the excitation and control of antiferromagne…
Non-Hermitian physics in magnetic systems Open
Non-Hermitian Hamiltonians provide an alternative perspective on the dynamics of quantum and classical systems coupled non-conservatively to an environment. Once primarily an interest of mathematical physicists, the theory of non-Hermitian…
Topological magnetic phase transition in Eu-based -type antiferromagnets Open
Recently, a colossal magnetoresistance (CMR) was observed in EuCd$_2$P$_2$ -- a compound that does not fit the conventional mixed-valence paradigm. Instead, experimental evidence points at a resistance driven by strong magnetic fluctuation…
Perspective: non-Hermitian physics in magnetic systems Open
Non-Hermitian Hamiltonians provide an alternative perspective on the dynamics of quantum and classical systems coupled non-conservatively to an environment. Once primarily an interest of mathematical physicists, the theory of non-Hermitian…
Multitude of exceptional points in van der Waals magnets Open
Several works have recently addressed the emergence of exceptional points (EPs), i.e., spectral singularities of non-Hermitian Hamiltonians, in the long-wavelength dynamics of coupled magnetic systems. Here, by focusing on the driven magne…
Topological magnetic phase transition in Eu-based A-type antiferromagnets Open
Recently, a colossal magnetoresistance (CMR) was observed in EuCd$_2$P$_2$ -- a compound that does not fit the conventional mixed-valence paradigm. Instead, experimental evidence points at a resistance driven by strong magnetic fluctuation…