ELFT HÍRADÓ

[Zimányiné Horváth Vera <Vera.Horvath AT eli-alps.hu>]

Előadó:           Paraskevas Tzallas (FORTH, Greece; ELI ALPS, Hungary)

Cím:                 Extreme Quantum Optics: Novel quantum light sources and 
applications in non-linear optics

Időpont:         2026. május 20., 9 óra
Helyszín:         az ELI ALPS konferenciaterme (Szeged, Wolfgang Sandner utca 
3.)

Absztrakt:
Recent theoretical and experimental investigations have shown that 
implementing fully quantized approaches in intense light-matter interactions 
opens new exciting ways for both fundamental research and applications in 
quantum technology and ultrafast science. These advances arise from the 
synergy of quantum optics and quantum information science with strong-field 
physics, and ultrafast science. Together, they have led to the development of 
the field of quantum optics and quantum electrodynamics in strong-field 
processes [1-4 and references therein], namely sometimes as Extreme Quantum 
Optics. At the core of this rapidly growing research field is the generation 
of non-classical and entangled light states from the far-infrared (IR) to the 
extreme-ultraviolet (XUV). This includes, coherent state superpostions 
(namely optical Schrödinger "cat" states) [5-7] and bright squeezed light 
sources [8, 9] with mean photon numbers capable to induce non-linear process 
in matter [10,11].
                Here, after a brief introduction, I will focus my talk on our 
most recent studies concerning the generation of optical "cat" states and 
their role in nonlinear optics [12]. I will also highlight the potential of 
fully quantum approaches in laser-driven semiconductor crystals for 
developing non-classical and entangled light states [13] in the VUV spectral 
region with attosecond pulse durations [14]. I will also briefly discuss a 
few additional key approaches developed more recently by other groups in this 
field, including our theoretical work on the propagation of bright 
squeezed-vacuum light states in nonlinear media [15].  Finally, I will share 
some thoughts on ELI's position within this scientific landscape and on the 
facility's potential to play a pivotal role at the forefront of fundamental 
research and technological applications at the fully quantized level.

References
[1] U. Bhattacharya, et al., Rep. Prog. Phys. 86, 094401 (2023).
[2] P. Stammer, et al., PRX Quantum 4, 010201 (2023).
[3] Th. Lamprou, et al., J. Phys. B 58, 132001 (2025).
[4] P. Stammer et al., arXiv:2510.19045v1 (2025).
[5] M. Lewenstein, et al. Nat. Phys. 17, 1104 (2021).
[6] J. Rivera-Dean, et al., Phys. Rev. A 105, 033714 (2022).
[7] P. Stammer, et al., Phys. Rev. Lett. 128, 123603 (2022).
[8] K. Y. Spasibko, et al., Phys. Rev. Lett. 119, 223603 (2017).
[9] M. Manceau, et al., Phys. Rev. Lett. 123, 123606 (2019).
[10] A. Gorlach, et al., Nat. Phys. 19, 1689 (2023).
[11] S. Lemieux, et al., Nat. Photon. 19, 767 (2025).
[12]Th. Lamprou, et al., Phys. Rev. Lett. 134, 013601 (2025).
[13] J. Rivera-Dean, et al. Phys. Rev. B 109, 035203 (2024).
[14] A. Nayak, et al., Nat. Commun. 16, 1428 (2025).
[15] J. Rivera-Dean, et al., arXiv:2509.19608 (2025)

A szeminárium angol nyelvű. Minden érdeklődőt szívesen látunk. A szeminárium 
online is meghallgatható:
https://teams.microsoft.com/l/meetup-join/19%3ameeting_MmQ2YTU4NTctYTc5OC00N2RjLTk0MGMtZjNjMTI4Nzc0MmE1%40thread.v2/0?context=%7b%22Tid%22%3a%22b207389a-c5cb-4cb0-a1ad-227b94e96448%22%2c%22Oid%22%3a%22c993efcb-59ae-4652-9f68-d7a313727128%22%7d

Üdvözlettel:

ZIMÁNYINÉ HORVÁTH Vera
Látogatóközpont-vezető
TEL             +36 70 491 1412
EMAIL     vera.horvath AT eli-alps.hu<mailto:vera.horvath AT eli-alps.hu>
WEB         www.eli-laser.eu<http://www.eli-laser.eu> | 
www.eli-alps.hu<http://www.eli-alps.hu>
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