Speaker: Vitalie Eremeev
Affiliation: Universidad Mayor, Santiago, Chile
Date: Friday, 12 June 2026 at 12:00
Location: Seminar Room, Serrano 113b
The laser stands as one of the most iconic examples of macroscopic coherence, fundamentally reshaping our understanding of light-matter interaction and underpinning key technologies of modern science. Yet lasing action is not exclusive to light: in principle, it can emerge in any bosonic system. The concept of the phonon laser, based on coherent vibrational excitations of mechanical oscillators, has emerged as a new frontier, bridging quantum optics, condensed matter physics, and hybrid quantum technologies. Despite recent progress, current phonon laser realizations remain confined to few-degree-of-freedom systems and typically rely on collective couplings mediated by a common field, limiting both the scalability and spatial control of the phenomenon. Overcoming these constraints is essential for exploring many-body collective regimes, where cooperative phenomena, quantum synchronization, and novel non-equilibrium dynamical phases can arise.
In this talk, I will present a mechanism for generating scalable arrays of individually controllable phonon lasers through Floquet modulation in an Ising-type quantum spin chain [1]. I will show how the interplay between interactions, local control, and dissipation drives a well-defined transition from thermal motion to sustained coherent self-oscillations. Unlike conventional approaches, our architecture removes the need for a global coupling bus, offering a modular, scalable scheme compatible with current hybrid quantum platforms. Notably, the laser array is resilient against resonance mismatches and exhibit complex collective behaviour, including pairwise synchronization and global phase locking. To highlight practical applications, we perform an error-propagation analysis to assess the sensing capabilities of the array. Since our proposal enables scalable and on-demand phonon lasers at arbitrary lattice sites, we believe the obtained results pave the way for advancements in quantum technologies, long-distance synchronization protocols, and quantum-acoustic many-body phenomena.
[1] H. Molinares, G. Romero, V. Montenegro, V. Eremeev, Scalable phonon-laser arrays with self-organized synchronization, arXiv:2603.29099 (2026) https://doi.org/10.48550/arXiv.2603.29099