International Workshop "Symmetries: Bulgaria-Armenia-Dubna — SymBAD'25"
from
Monday 20 October 2025 (09:45)
to
Friday 24 October 2025 (16:00)
Monday 20 October 2025
09:45
Opening
Opening
09:45 - 10:00
Room: 3rd floor
10:00
Magnons in two-parameter deformed AdS_3 × S^3 × (· · · ) and Neumann-Rosochatius integrable system
-
Radoslav Rashkov
(
Sofia University
)
Magnons in two-parameter deformed AdS_3 × S^3 × (· · · ) and Neumann-Rosochatius integrable system
Radoslav Rashkov
(
Sofia University
)
10:00 - 11:00
Room: 3rd floor
11:00
Semi-classical strings in two-parameter deformed holographic background
-
Hristo Dimov
(
BLTP JINR
)
Semi-classical strings in two-parameter deformed holographic background
Hristo Dimov
(
BLTP JINR
)
11:00 - 11:45
Room: 3rd floor
11:45
Coffee Break
Coffee Break
11:45 - 12:30
Room: 3rd floor
12:30
Optimal control theory of black holes
-
Tsvetan Vetsov
(
Sofia University
)
Optimal control theory of black holes
Tsvetan Vetsov
(
Sofia University
)
12:30 - 13:15
Room: 3rd floor
13:15
New variants of N = 3, 4 superconformal mechanics
-
Sergey Krivonos
(
BLTP JINR
)
New variants of N = 3, 4 superconformal mechanics
Sergey Krivonos
(
BLTP JINR
)
13:15 - 14:00
Room: 3rd floor
14:00
Remarks on supersymmetric mechanics with spin-orbit coupling term
-
Armen Nersessian
(
Yerevan Physics Institute & NAS Institute of Radiophysics and Electronics
)
Remarks on supersymmetric mechanics with spin-orbit coupling term
Armen Nersessian
(
Yerevan Physics Institute & NAS Institute of Radiophysics and Electronics
)
14:00 - 14:45
Room: 3rd floor
18:00
Welcome Party
Welcome Party
18:00 - 20:00
Tuesday 21 October 2025
10:00
Van-der-Waals Clusters of rare gases and Efimov states
-
Elena Kolganova
(
BLTP JINR
)
Van-der-Waals Clusters of rare gases and Efimov states
Elena Kolganova
(
BLTP JINR
)
10:00 - 11:00
Room: 3rd floor
11:00
Correlators in phase-ordering from Schrödinger-invariance
-
Stoimen Stoimenov
(
INRNE BAS
)
Correlators in phase-ordering from Schrödinger-invariance
Stoimen Stoimenov
(
INRNE BAS
)
11:00 - 11:45
Room: 3rd floor
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.
11:45
Coffee Break
Coffee Break
11:45 - 12:30
Room: 3rd floor
12:30
Geometric optimal control of quantum systems
-
Miroslav Radomirov
(
Sofia University
)
Geometric optimal control of quantum systems
Miroslav Radomirov
(
Sofia University
)
12:30 - 13:15
Room: 3rd floor
13:15
Complexity and related measures of supersymmetric polynomials
-
Vasil Avramov
(
Sofia University
)
Complexity and related measures of supersymmetric polynomials
Vasil Avramov
(
Sofia University
)
13:15 - 14:00
Room: 3rd floor
14:00
The 5-point Liouville conformal block with a level 2 degenerate field insertion
-
Hasmik Poghosyan
(
Yerevan Physics Institute
)
The 5-point Liouville conformal block with a level 2 degenerate field insertion
Hasmik Poghosyan
(
Yerevan Physics Institute
)
14:00 - 14:45
Room: 3rd floor
Wednesday 22 October 2025
10:00
Vogel's invariance and refinement
-
Andrei Mironov
Vogel's invariance and refinement
Andrei Mironov
10:00 - 11:00
Room: 3rd floor
11:00
On the universal Casimir spectrum
-
Ruben Mkrtchyan
(
Yerevan Physics Institute
)
On the universal Casimir spectrum
Ruben Mkrtchyan
(
Yerevan Physics Institute
)
11:00 - 11:45
Room: 3rd floor
11:45
Coffee Break
Coffee Break
11:45 - 12:30
Room: 3rd floor
12:30
Vogel universality and beyond
-
Alexey Isaev
(
BLTP JINR
)
Vogel universality and beyond
Alexey Isaev
(
BLTP JINR
)
12:30 - 13:15
Room: 3rd floor
13:15
On lagrangian geometry of Grassmannian Gr(r, n)
-
Nikolay Tyurin
(
BLTP JINR
)
On lagrangian geometry of Grassmannian Gr(r, n)
Nikolay Tyurin
(
BLTP JINR
)
13:15 - 14:00
Room: 3rd floor
14:00
C^N-Smorodinsky-Winternitz and CP^N-Rosochatius systems
-
Hovhannes Shmavonyan
(
Yerevan Physics Institute
)
C^N-Smorodinsky-Winternitz and CP^N-Rosochatius systems
Hovhannes Shmavonyan
(
Yerevan Physics Institute
)
14:00 - 14:45
Room: 3rd floor
18:00
Workshop Dinner
Workshop Dinner
18:00 - 21:00
Thursday 23 October 2025
10:00
Symmetries at the front of a gravitational shock wave
-
Irina Pirozhenko
(
BLTP JINR
)
Symmetries at the front of a gravitational shock wave
Irina Pirozhenko
(
BLTP JINR
)
10:00 - 11:00
Room: 3rd floor
11:00
Electromagnetic Transition Radiation on Gravitational Shockwaves
-
Vladislav Tainov
(
BLTP JINR
)
Electromagnetic Transition Radiation on Gravitational Shockwaves
Vladislav Tainov
(
BLTP JINR
)
11:00 - 11:45
Room: 3rd floor
11:45
Coffee Break
Coffee Break
11:45 - 12:30
Room: 3rd floor
12:30
Solitons with localized fermions
-
Yakov Shnir
(
BLTP JINR
)
Solitons with localized fermions
Yakov Shnir
(
BLTP JINR
)
12:30 - 13:15
Room: 3rd floor
13:15
TKK for Jordan superalgebras
-
Todor Popov
(
INRNE BAS
)
TKK for Jordan superalgebras
Todor Popov
(
INRNE BAS
)
13:15 - 14:00
Room: 3rd floor
14:00
On quantum properties of the higher-derivative supersymmetric 6D, N=(1,0) gauge theory
-
Alexandra Budekhina
(
BLTP JINR
)
On quantum properties of the higher-derivative supersymmetric 6D, N=(1,0) gauge theory
Alexandra Budekhina
(
BLTP JINR
)
14:00 - 14:45
Room: 3rd floor
Friday 24 October 2025
10:00
Boundary Correlators and Bulk Cubic Interactions for Higher Spins: Constructive Approach and Anomaly
-
Ruben Manvelyan
(
Yerevan Physics Institute
)
Boundary Correlators and Bulk Cubic Interactions for Higher Spins: Constructive Approach and Anomaly
Ruben Manvelyan
(
Yerevan Physics Institute
)
10:00 - 11:00
Room: 3rd floor
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 $d = 4$.
11:00
Adjustment of Faddeev-Popov quantization scheme for first stage reducible gauge theories
-
Ioseph Buchbinder
(
BLTP JINR
)
Adjustment of Faddeev-Popov quantization scheme for first stage reducible gauge theories
Ioseph Buchbinder
(
BLTP JINR
)
11:00 - 11:45
Room: 3rd floor
11:45
Coffee Break
Coffee Break
11:45 - 12:30
Room: 3rd floor
12:30
Continuous spin superparticle in flat and AdS superspaces
-
Sergey Fedoruk
(
BLTP JINR
)
Continuous spin superparticle in flat and AdS superspaces
Sergey Fedoruk
(
BLTP JINR
)
12:30 - 13:15
Room: 3rd floor
13:15
Continuous spin representation in AdS_6 space
-
Mikhail Podoinitsyn
(
BLTP JINR
)
Continuous spin representation in AdS_6 space
Mikhail Podoinitsyn
(
BLTP JINR
)
13:15 - 14:00
Room: 3rd floor
14:00
Closing
Closing
14:00 - 14:20
Room: 3rd floor