BPU 12 Congress

Session

Quantum Physics, Information and Communication

S10

9 Jul 2025, 15:00

Politechnica Univ

19. Probing and Controlling Many-Body Quantum Dynamics and Chaos

Klaus Richter (University of Regensburg)

09/07/2025, 15:00

S10 – Quantum Physics, Information and Communication

Invited Lecture

The notions of chaos and order are central to understanding the statistical physics of many-body systems. Thermalization and the spread of quantum information in chaotic many-body dynamics is presently attracting a lot of attention across various fields, ranging from statistical physics via cold atom physics to quantum gravity. Starting from the concept of a ”quantum butterfly effect”, this...

65. Quantum Dynamics in Multiple Quantum Dots Systems

Mihai Macovei (Institute of Applied Physics)

09/07/2025, 15:30

S10 – Quantum Physics, Information and Communication

Invited Lecture

Quantum Dynamics in Multiple Quantum Dots Systems

Tatiana Mihaescu^{1}, Aurelian Isar^{1}, and Mihai A. Macovei^{2}

{}^{1} National Institute of Physics and Nuclear Engineering, Reactorului 30, RO-077125, Măgurele-Bucharest, Romania
{}^{2} Institute of Applied Physics, Moldova State University, Chișinău, Moldova
*E-mail: mihai.macovei@ifa.usm.md

Light-matter interactions...

29. Sequre quantum teleportation of a squeezed thermal state

Marina Cuzminschi (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH))

09/07/2025, 16:00

S10 – Quantum Physics, Information and Communication

Oral Presentations

Secure quantum teleportation is essential for reliable transfer of quantum information across distant locations. It paves the way for future quantum networks and quantum communication systems. Consideration of an input squeezed thermal state is more realistic and appropriate for many applications because of losses caused by interaction with environment. The secure teleportation is conditioned...

128. Optical control of single-mode phonons via artificial atoms

Dr Victor Ceban (Institute of Applied Physics, Moldova State University)

09/07/2025, 16:10

S10 – Quantum Physics, Information and Communication

Oral Presentations

There is a plethora of mechanisms in quantum optics that allow for the optical control of the atomic decay. In this way, the spontaneous emission responsible for the population decay of the excited atom, can be enhanced or slowed-down. These control mechanisms can be, as well, applied to hybrid optomechanical devices that contain an emitter such as an artificial atom or a molecule. For such...

187. Dynamics of strongly coupled harmonic oscillators in Gaussian noisy channels

Tatiana Mihaescu

09/07/2025, 16:20

S10 – Quantum Physics, Information and Communication

Oral Presentations

We investigate the Markovian evolution of Gaussian entanglement and steering in a system consisting
of two strongly coupled harmonic oscillators immersed in a structured environment. Specically, we analyze
the contribution of the interaction between modes when the magnitude of the intermode coupling strength
is comparable to the local frequencies of the modes, and the rotating wave...

239. Environment-assisted generation of quantum correlations in open quantum systems

Alina-Alexandra Stoica (1National Institute of Physics and Nuclear Engineering, Reactorului 30, RO-077125, Bucharest-Magurele, Romania)

09/07/2025, 16:30

S10 – Quantum Physics, Information and Communication

Oral Presentations

Hellinger geometric quantum discord and interferometric power are analyzed for an open system
consisting of two bosonic modes, while interacting with four different environments: vacuum, squeezed
vacuum, thermal and squeezed thermal, taking the initial state of the open system to be either a singlemode
squeezed state, which presents no initial correlations or a squeezed vacuum state. The...

240. Werner states in non inertial frames

Madalin Calamanciuc (National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania, Faculty of Physics, University of Bucharest, Romania)

09/07/2025, 16:40

S10 – Quantum Physics, Information and Communication

Oral Presentations

We investigated the separability of a general Werner state in the framework of non-inertial frames
of references. We considered bimodal and trimodal quantum systems described by modes of different
field theories. Our analysis include the study of a free scalar quantum field for describing bosons and
a free Dirac field associated with the description of Fermions. We provided condition of...

241. Quantum entanglement of two bosonic modes in de Sitter space

Aurelian Isar (National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania, Faculty of Physics, University of Bucharest, Romania)

09/07/2025, 16:50

S10 – Quantum Physics, Information and Communication

Oral Presentations

In recent years, extensive studies on quantum correlations in various scenarios, such as non-inertial
frames, curved spacetime, and an expanding universe have been performed [1–6]. In the framework
of the theory of open systems based on completely positive quantum dynamical semigroups, we
investigate the time evolution of Gaussian quantum entanglement of two bosonic modes associated
with a...