SCIENCE BRINGS NATIONS TOGETHER International Workshop "Symmetries: Bulgaria-Armenia-Dubna — SymBAD'25"

20 Oct 2025, 09:45 → 24 Oct 2025, 16:00 Asia/Yerevan

3rd floor (Yerevan Physics Institute)

Sergey Krivonos (JINR)

We are pleased to inform you that we are going to organise a small workshop on "Symmetries" intended to develop scientific cooperation between Bulgaria, Armenia and Dubna — "SymBAD'25". The workshop is initiated by the Joint Institute for Nuclear Research (JINR) and will be held in Yerevan from 20 till 24 October of 2025. The Armenian and Bulgarian sides are represented by the A. I. Alikhanyan National Science Laboratory (AANL aka Yerevan Physics Institute) and Sofia University. The local organisation and venue in Yerevan will be carried out by AANL.

The main topics of the workshop are:

• Supersymmetry
• Integrable Systems
• Gravity
• Mathematical Physics
• Higher Spin Theories

The event will be attended by leading Armenian, Bulgarian and JINR scientists on these topics. The programme will include around 30 talks. The participation fee is 100 USD.

For the registration, please send an email to Stepan Sidorov (sidorovstepan88@gmail.com) with the following details:

• First Name
• Last Name
• Affiliation
• Title of Talk

Please note that applicants must receive confirmation from Programme Committee to be included in the programme.

SymBAD25.jpg

SymBAD'25_Schedule.pdf

SymBAD’25_Speaker List.pdf

Monday 20 October

09:45 Opening

1 Magnons in two-parameter deformed AdS_3 × S^3 × (· · · ) and Neumann-Rosochatius integrable system

Speaker: Radoslav Rashkov (Sofia University)

2 Semi-classical strings in two-parameter deformed holographic background

Speaker: Hristo Dimov (BLTP JINR)

11:45 Coffee Break

3 Optimal control theory of black holes

Speaker: Tsvetan Vetsov (Sofia University)

4 New variants of N = 3, 4 superconformal mechanics

Speaker: Sergey Krivonos (BLTP JINR)

5 Remarks on supersymmetric mechanics with spin-orbit coupling term

Speaker: Armen Nersessian (Yerevan Physics Institute & NAS Institute of Radiophysics and Electronics)

18:00 Welcome Party

Tuesday 21 October

6 Van-der-Waals Clusters of rare gases and Efimov states

Speaker: Elena Kolganova (BLTP JINR)

7 Correlators in phase-ordering from Schrödinger-invariance

Systems undergoing phase-ordering kinetics after a quench into the ordered phase with $0<T<T_c$ from a fully disordered initial state and with a non-conserved order-parameter have the dynamical exponent $z=2$. The long-time behaviour of their single-time and two-time correlators, determined by the noisy initial conditions, is derived from Schrödinger-invariance. The generic properties of the correlators are derived from the Schrödinger co-variance of the four-point response functions. The autocorrelation exponent $\lambda$ is related to the passage exponent $\zeta_p$ which describes the time-scale for the cross-over into the ageing regime.

Speaker: Stoimen Stoimenov (INRNE BAS)

11:45 Coffee Break

8 Geometric optimal control of quantum systems

Speaker: Miroslav Radomirov (Sofia University)

9 Complexity and related measures of supersymmetric polynomials

Speaker: Vasil Avramov (Sofia University)

10 The 5-point Liouville conformal block with a level 2 degenerate field insertion

Speaker: Hasmik Poghosyan (Yerevan Physics Institute)

Wednesday 22 October

11 Vogel's invariance and refinement

Speaker: Andrei Mironov

12 On the universal Casimir spectrum

Speaker: Ruben Mkrtchyan (Yerevan Physics Institute)

11:45 Coffee Break

13 Vogel universality and beyond

Speaker: Alexey Isaev (BLTP JINR)

14 On lagrangian geometry of Grassmannian Gr(r, n)

Speaker: Nikolay Tyurin (BLTP JINR)

15 C^N-Smorodinsky-Winternitz and CP^N-Rosochatius systems

Speaker: Hovhannes Shmavonyan (Yerevan Physics Institute)

18:00 Workshop Dinner

Thursday 23 October

16 Symmetries at the front of a gravitational shock wave

Speaker: Irina Pirozhenko (BLTP JINR)

17 Electromagnetic Transition Radiation on Gravitational Shockwaves

Speaker: Vladislav Tainov (BLTP JINR)

11:45 Coffee Break

18 Solitons with localized fermions

Speaker: Yakov Shnir (BLTP JINR)

19 TKK for Jordan superalgebras

Speaker: Todor Popov (INRNE BAS)

20 On quantum properties of the higher-derivative supersymmetric 6D, N=(1,0) gauge theory

Speaker: Alexandra Budekhina (BLTP JINR)

Friday 24 October

21 Boundary Correlators and Bulk Cubic Interactions for Higher Spins: Constructive Approach and Anomaly

We propose a general hypothesis for the correlation functions of same-spin conformal currents: that the Osborn–Petkou structural tensor for higher spins correlators, satisfying the appropriate symmetry conditions, can be constructed from combinations of the principal terms of spin-1 and spin-2 structural tensors, raised to the corresponding spin-s degree. Then construction

of the conserved three-point function is the algebraic task. We verify this hypothesis explicitly for spins three and four, and demonstrate that the resulting solutions can be interpreted as the CFT duals of cubic interactions in AdS space with one additional dimension. This framework then allows us to initiate a study of the higher-spin conformal anomaly structure, which emerges from the principal singularity of the three-point correlation function in $d = 4$.

Speaker: Ruben Manvelyan (Yerevan Physics Institute)

22 Adjustment of Faddeev-Popov quantization scheme for first stage reducible gauge theories

Speaker: Ioseph Buchbinder (BLTP JINR)

11:45 Coffee Break

23 Continuous spin superparticle in flat and AdS superspaces

Speaker: Sergey Fedoruk (BLTP JINR)

24 Continuous spin representation in AdS_6 space

Speaker: Mikhail Podoinitsyn (BLTP JINR)

14:00 Closing