COLLECTIVE DYNAMICS, DISSIPATION AND FRAGMENTATION IN QUANTUM
MESOSCOPIC SYSTEMS
Research Project financed
by the Executive Agency for Higher Education,
Research, Development and Innovation Funding (UEFISCDI) under contract
3/5.10.2011.
Project ID: PN-II-ID-PCE-2011-3-0972
Project Director: Prof. Dr. Virgil BARAN
One of
the important challenges of modem physics is to understand
from experiments and predict from
fundamental theories the phase diagram of strongly interacting
matter including the
transitions between different phases as well
as its dynamical behavior.
The impetuous experimental
progress during the
last decade provided the opportunity to explore
nuclear matter at unprecedented
temperatures, densities and charges. Currently, nuclei and quark-gluon plasma (QGP)
are among the
most investigated mesoscopic quantum systems. Nuclear matter manifests all features of a many-body system and shares similarities with quantum fluids such
as Bose Einstein condensates (BECs) and cold Femi gases,
despite some 20 orders of
magnitude in energy
scale. Depending on the energy scale, the degrees
of freedom of nuclear matter go
from nucleons to quarks and gluons, their experimental observation therefore requiring a wide variety of techniques. Heavy ions
collisions are particularly appealing as they provide the terrestrial
laboratory needed to explore the behavior
of nuclear matter in extreme
conditions. Based on the scientific experience of the project leader and that
of the team,
we plan to
answer within microscopic
transport models some challenging questions
regarding the collective dynamics of nuclear matter, dissipation mechanisms and fragmentation
phenomena in heavy ion collisions. To
this end,
we shall scrutinize
regimes from around the Coulomb
barrier up to
ultra-relativistic energies typical for the
RHIC and LHC experiments where clear evidences for QGP formation were reported.
Moreover, based on the observed analogies
between nuclear matter
and quantum fluids,
we will extend the transport methods used in nuclear physics to investigate the interplay between the core of a BEC and
the surrounding thermal cloud as a first step
towards an extensive study of BEC
behavior driven by strong
interactions. One example of such BEC-like behavior is the transition
from QCD-confined, hadronic phase to
deconfined, quark-gluon
phase at low temperatures
and high densities.
Project
team:
Prof. Dr. Virgil BARAN – Project leader
Dr. Alexandru I. NICOLIN – Senior researcher
Lecturer Dr. Roxana ZUS – Postdoctoral
researcher
Mihaela Carina RAPORTARU – Doctoral researcher
Andreea CROITORU – Master student
Objectives:
WP1: Insight into the features of collective modes
and of entrance channel dynamics in dissipative reactions with exotic nuclei
WP2:
Advanced investigations of the
fragmentation mechanisms at Fermi energies
WP3: Collective dynamics and fragmentation in BECÕs
within the Gross-Pitaevskii Boltzmann formalism
WP4: Transport description of
collective features and dissipation in QGP
The Research Report for 2011 (in Romanian) can be
downloaded here.
The Research Report for 2012 (in Romanian) can be
downloaded here.
The Research Report for the period 2011-2013 (in
Romanian) can be downloaded here.
The Research Report for the period 2011-2014 (in
English) can be downloaded here.
The Research Report for 2015 (in Romanian) can be
downloaded here.
List
of publications:
¤
V.
Baran, B. Frecus, M. Collona, and M. Di. Toro, Pygmy dipole resonance: collective features and symmetry energy effects,
Physical Review C 85, 051601(R)
(2012) – IF=3.715
¤
V.
Baran, M. Colonna, M. Di. Toro, and R. Zus, From
multifragmentation to neck fragmentation: Mass, isospin, and velocity
correlations, Physical Review C 85,
054611 (2012) – IF=3.715
¤
E.
De Filippo,É, V. Baran et al., Correlations between emission timescale of
fragments and isospin dynamics in 124Sn+64Ni and 112Sn+58Ni reactions at 35 A
MeV, Physical Review C 86,
014610 (2012) – IF=3.715
¤
V.
Baran, M. Colonna, V. Greco, M. Di Toro, S. Plumari, and R. Zus, Kinetic approaches to phase transitions in
strongly interacting matter, Journal of Physics: Conf. Series 338, 012020 (2012)
¤
V.
Baran, B. Frecus, M. Colonna, M. Di Toro, and R. Zus, Collective dipole modes in nuclear systems, Romanian Journal of
Physics 57, 36 (2012) – IF=0.526
¤
M.
Colonna, V. Baran, M. Di Toro, and C. Rizzo, Exploring the nuclear matter phase
diagram with heavy ion reactions, Journal of Physics: Conf. Series 413, 012018 (2013)
¤
M.
Colonna, V. Baran, M. Di Toro, B Frecus, and Y.X. Zhang, Reaction mechanisms in transport theories: a test of nuclear effective
interaction, Journal of Physics: Conf. Series 420, 012104 (2013)
¤
A.I.
Nicolin, Density waves in dipolar
Bose-Einstein condensates, Proc. Rom. Acad. Series A 14, 35 (2013) – IF=1.115
¤
V.
Baran, B. Frecus, M. Colonna, M. Di Toro, A. Croitoru, and D. Dumitru, From
neutron skin to Pygmy Dipole Resonance: the roles of symmetry energy in a
transport approach,
Romanian Journal of Physics 58, 1208
(2013) – IF=0.745
¤
S.
Balasubramanian, R. Ramaswamy, and A. I. Nicolin, Faraday waves in cigar-shaped Bose-Einstein condensates with radially
inhomogeneous scattering lengths, Romanian Reports in Physics 65, 820 (2013) – IF=1.137
¤
A. Balaz, A. I. Nicolin, Fragmentation of a
Bose-Einstein condensate through periodic modulation of the
scattering length, chapter in Localized
excitations in nonlinear complex systems, Eds. R. Carretero-Gonzalez et al., Springer,
2014, DOI 10.1007/978-3-319-02057-0__5
¤
V.
Baran, M. Colonna, M. Di Toro, A. Croitoru, and D. Dumitru, Connecting
the Pygmy Dipole Resonance to neutron skin, Physical Review C 88, 044610 (2013) –
IF=3.881
¤
M.
Colonna, V. Baran, M. Di Toro, Theoretical predictions of experimental observables sensitive to the symmetry energy,
European Physics Journal A 50, 30
(2014) – IF=2.421
¤
A. Balaz, R. Paun, A.
Nicolin, S. Balasubramanian, R. Ramaswamy, Faraday waves in collisionally inhomogeneous
Bose-Einstein condensates, Physical
Review A 89, 023609 (2014) –
IF=2.991
¤
V. Baran, M. Colonna, M.
Di Toro, B. Frecus, A. Croitoru, and D. Dumitru, Nuclear collective dynamics within Vlasov approach, European
Physics Journal D 68, 356 (2014)
– IF=1.398
¤
C. Rizzo, M. Colonna, V.
Baran, and M. Di Toro, Exotic break-up
modes in heavy ion reactions at low energies, Physical Review C 90, 054618 (2014) – IF=3.881
¤
V. Baran, M. Colonna, M.
Di Toro, A. Croitoru, and D. Dumitru, Collective
features of nuclear dynamics with exotic nuclei within microscopic transport
models, EPJ Web of Conferences 66,
03004 (2014)
¤
V. Baran, M. Colonna, M.
Di Toro, and R. Zus, Collective flow
properties of intermediate mass fragments and isospin effects in fragmentation
at Fermi energies, AIP Conference Proceedings 1564, 150 (2013)
¤
M. Colonna, V. Baran,
and M. Di Toro, News on the equation of
state from heavy ion reactions, Journal of Physics: Conference Series 527,
012009 (2014)
¤
P. Russotto et al., Production cross sections for intermediate mass fragments from dynamical
and statistical decay of projectile-like fragments in Sn-124+Ni-64 and
Sn-112+Ni-58 collisions at 35 A MeV, Phys. Rev. C 91,
014610 (2015) – IF=3.881
¤
V. Baran, M. Collona, M. Di
Toro, A. Croitoru, and A.I. Nicolin, Mass
and isospin dependence of the dipole response in a micrscopic transport approach,
AIP Conference Proceedings 1645, 267
(2015)
¤
V. Baran, D.I. Palade, M.
Colonna, M. Di Toro, A. Croitoru, and A.I. Nicolin, Collectivity of the pygmy dipole resonance within schematic
Tamm-Dancoff approximation and random-phase approximation models, Phys.
Rev. C 91, 054303 (2015) –
IF=3.881
¤
V.
Baran, M. Marciu, D. I. Palade, M. Colonna, M. di Toro, A. I. Nicolin, and R. Zus, Collective dynamics
and fragmentation in nuclear systems, Rom. J. Phys. 60, 727 (2015) – IF= 0.924
¤
A. Croitoru, V. Baran, T.
Isdraila, M. Colonna, M. di Toro, and M. Marciu, Pygmey dipole resonance in a schematic model, Rom. J. Phys. 60, 748 (2015) – IF= 0.924
¤
M. Colonna, V. Baran, S.
Burrello, M. di Prima, P. Napolitani, and C. Rizzo, Exotic break-up modes in heavy ion reactions up to Fermi energies,
Nuclear Science and Techniques 26,
S20509 (2015) – IF=0.401
¤
D. I. Palade and V.
Baran, General Static Polarizability in Spherical Neutral
Metal Clusters and Fullerenes within Thomas-Fermi Theory, Rom. J. Phys. 60, 1019 (2015)– IF= 0.924
¤
D. Palade and V. Baran, Optical
response of C60 fullerene from a Time Dependent Thomas Fermi approach, J. Phys. B: At. Mol. Opt. Phys. 48,
185102 (2015) – IF=1.975
¤
V.Baran, M. Zus,
A.Bonasera, and A. Paturca, Quantifying the folding mechanism in chaotic
dynamics, Rom. J. Phys. 60, 1263 (2015) – IF=0.924
¤
R.
Tabacu, M.C. Raportaru, E. Slusanschi, V. Baran, and A.I. Nicolin, The
speed-up of a Boltzmann-Vlasov code, Rom. J. Phys. 60, 1441 (2015) –
IF=0.924
¤
M.
Colonna, V. Baran, and C. Rizzo, Isospin effects in heavy-ion reactions:
results from transport theories, EPJ Web of Conferences 88, 00027 (2015)
PhD
theses:
¤
Collective nuclear motions within a microscopic
transport model, defended by
Bogdan Frecus in September 2012 at the Faculty of Physics of University of
Bucharest
¤
Studies on the nonlinear and stochastic behavior of
Bose-Einstein condensates,
defended by Mihaela Carina Raportaru in October 2012 at the Faculty of Physics
of University of Bucharest
|
Contact |
|
Prof. Dr. Virgil Baran |