Gustavo Sergio Lozano

Profesor/a Titular Investigador Principal, CONICET Esta dirección de correo electrónico está siendo protegida contra los robots de spam. Necesita tener JavaScript habilitado para poder verlo. Página web personal Grupo de Materia Condensada

Área de investigación: Materia condensada

• Teoría de Campos
• Dinámica de sistemas fuera del equilibrio
• Dinámica de vórtces en superconductores.

Intereses

Aplicación de técnicas de Teorías de Campos a sistemas de Materia Condensada y Mecánica Estadística.
Université Pierre et Marie Curie, Paris 6, France, Research Associate, September 2023, CNRS

Université Diderot, Paris 7, France, Invited Professor, June 2017

Université Diderot, Paris 7, France, Invited Professor, Alicia Moreau de Justo Chair, March 2014

Université Pierre et Marie Curie, Paris 6, France, Research Associate, June-August 2013, CNRS

International Centre for Theoretical Physics, Trieste, Italy, Associate Scheme Member,
2001-2007

Imperial College, London, UK, Mathematics Department. Research associate, Oct 2002 -Dic 2003

Universidad Nacional de La Plata, Argentina, Associate Professor, Department of Mathematics,
March 1999, March 2001.

IPN, Université de Paris XI, Orsay, Paris, France, Visiting Scientist, Training and Mobility of Researchers-EU, Jan 1997 – Dec 1998.

Heidelberg University, Heidelberg, Germany. Visiting Scientist,
von-Humboldt Foundation fellow, August 1996 – Jan 1997.

Imperial College, London, UK, Physics Department, Visiting Scientist, Fundación Antorchas-British Council Fellow, Feb 1996 -Aug 1996

International Centre for Theoretical Physics, Trieste, Italy. Visiting Scientist. HighEnergy Section.
March 1993 to Dec1995.

Massachusetts Institute of Technology, Cambridge, MA, USA. Visiting Scientist, World Laboratory fellow. Feb 1991- Feb 1993.

Publicaciones seleccionadas

GINZBURG-LANDAU APPROACH TO THE VORTEX–DOMAIN WALL INTERACTION IN SUPERCONDUCTORS WITH NEMATIC ORDER
R. S. Severino, P. D. Mininni, E. Fradkin, V. Bekeris, G. Pasquini, and G. S. Lozano
PHYS. REV. B 109, 094513 – PUBLISHED 18 MARCH 2024

VORTICES IN A GINZBURG-LANDAU THEORY OF SUPERCONDUCTORS WITH NEMATIC ORDER
R. S. Severino, P. D. Mininni, E. Fradkin, V. Bekeris, G. Pasquini, and G. S. Lozano
Phys. Rev. B 106, 094512 – September 2022

GENERALISED GIBBS ENSEMBLE FOR SPHERICALLY CONSTRAINED HARMONIC MODELS
SCIPOST PHYSICS 13 (3), 048, 2022
D Barbier, LF Cugliandolo, GS Lozano, N Nessi

(Non-equilibrium) thermodynamics of integrable models: The Generalized Gibbs Ensemble description of the classical Neumann model
D Barbier, LF Cugliandolo, GS Lozano, N Nessi
EPL (Europhysics Letters) 132 (5), 50002

Vortices in fracton type gauge theories
GS Lozano, FA Schaposnik
Physics Letters B 811, 135978

Unprecedented Optical Anisotropy in Optimally Doped Iron-Based Superconductor
L Degiorgi, A Pal, M Chinotti
Bulletin of the American Physical Society 65

Active hard spheres in infinitely many dimensions
TA de Pirey, G Lozano, F van Wijland
Physical review letters 123 (26), 260602

Pre-asymptotic dynamics of the infinite size Neumann (p= 2 spherical) model
D Barbier, LF Cugliandolo, GS Lozano, N Nessi, M Picco, A Tartaglia
Journal of Physics A: Mathematical and Theoretical 52 (45), 454002 1

Nematicity in superconducting underdoped Ba (Fe 1-x Co x) 2 As 2
J Schmidt, V Bekeris, GS Lozano, MV Bortulé, MM Bermúdez, CW Hicks, ...
StatPhys 27 Main Conference

Nematicity in the superconducting mixed state of strain detwinned underdoped Ba(
J Schmidt, V Bekeris, GS Lozano, MV Bortulé, MM Bermúdez, CW Hicks, ...
Physical Review B 99 (6), 064515

Role of initial conditions in the dynamics of quantum glassy systems
LF Cugliandolo, GS Lozano, N Nessi
Journal of Statistical Mechanics: Theory and Experiment 2019 (2), 023301

Nematicity in the superconducting mixed state of strain detwinned underdoped
J Schmidt, V Bekeris, GS Lozano, MV Bortulé, MM Bermúdez, CW Hicks, ...
arXiv preprint arXiv:1901.02504

Quenched dynamics of classical isolated systems: the spherical spin model with two-body random interactions or the Neumann integrable model
LF Cugliandolo, GS Lozano, N Nessi, M Picco, A Tartaglia
Journal of Statistical Mechanics: Theory and Experiment 2018 (6), 063206

Dynamic reorganization and thermal history effects in vortex matter
G Pasquini, M Bermúdez, D Perez Daroca, G Lozano, M Eskildsen, ...
APS March Meeting Abstracts 2018, Y04. 004

Non equilibrium dynamics of isolated disordered systems: the classical Hamiltonian p-spin model
LF Cugliandolo, GS Lozano, EN Nessi
Journal of Statistical Mechanics: Theory and Experiment 2017 (8), 083301

Fermion zero modes in a Z 2 vortex background
G Lozano, A Mohammadi, FA Schaposnik
Physical Review D 94 (6), 065011

64 Dynamical symmetries of Markov processes with multiplicative white noise
Camille Aron, Daniel G. Barci, Leticia F. Cugliandolo, Zochil Gonzalez Arenas, Gustavo S. Lozano
arXiv:1412.7564

65-Magnetic structures and Z_2 vortices in a non-Abelian gauge model
Daniel Cabra, Gustavo S. Lozano, Fidel A. Schaposnik
Journal-ref: Phys. Rev. D 92, 124033 (2015)
ISSN:0556-2821


64-Fermion Zero modes in the vortex background of a Chern Simons Higgs theory with a hidden sector,
Gustavo Lozano, Azadeh Mohammadi, Fidel A Scahposnik
JHEP11 (2015) 042
ISSN:1126-6708

63 Stochastic dynamics of collective modes for Brownian dipoles
Leticia F. Cugliandolo, Pierre-Michel Dejardin, Gustavo S. Lozano and Fred´ eric van Wijland
PHYSICAL REVIEW E 91, 032139 (2015)
ISNN 1550-2376

62 Magnetization dynamics: path-integral formalism for the stochastic Landau-Lifshitz-Gilbert equation
Camille Aron, Daniel G. Barci, Leticia F. Cugliandolo, Zochil Gonzalez Arenas, Gustavo S. Lozano
arXiv:1403.4822
Journal of Statistichal Mechanics P09008 (2014)
ISSN: 1742-5468


61*Numerical integration of the stochastic Landau-Lifshitz-Gilbert equation in generic time-discretisation schemes
Federico Romá, Leticia F. Cugliandolo, Gustavo S. Lozano
Phys. Rev. E 90, 023203
ISNN 1550-2376

60 Existence theorems for non-Abelian Chern--Simons--Higgs vortices with flavor
Shouxin Chen, Xiaosen Han, Gustavo Lozano, F. A.Schaposnik
arXiv:1309.1919
Journal of Differential Equations, Volume 259, Issue 6, 15 September 2015, Pages 2458-2498
ISSN: 0022-0396

59 GAUGED LIFSHITZ MODEL WITH CHERN SIMONS TERM
G.S.Lozano, F.A.Scahponik, G Tallarita
arXiv: 1210.1182
International Journal of Modern Physics A, Volume 28, Issue 9, id. 1350025
ISSN: 0217-751X

58 *DEFNING THE EFFECTIVE TEMPERATURE OF A QUANTUM DRIVEN SYSTEM FROM CURRENT CURRENT CORRELATION FUNCTIONS
Alvaro Caso, Liliana Arrachea, Gustavo S. Lozano
European Physical Journal B, Volume 85, number 8, 266, 2012
ISSN (Print Edition): 1434-6028

57*RELATION BETWEEN LOCAL TEMPERTURE GRADIENTS AND THE DIRECTION OF HEAT FLOW IN QUANTUM DRIVEN SYSTEMS
Alvaro Caso, Liliana Arrachea, Gustavo S. Lozano,
Physica B, 407, 3172 (2012)
ISSN: 0921-4526

56* CURRENT INDUCED SWITCHING IN TRANSPORT TROGH ANUSOTROPIC MAGNETIC MOLECULES
N. Bode, L. Arrachea, G. Lozano, T.S. Nunner, and F. von Oppen
Phys. Rev. B 85, 115440 (2012).
Editorial:American Physical Society, College Park
ISSN 0921-4526.

*55 DYNAMICS OF SUPERCONDUCTING VORTICES DRIVEN BY OSCILLATORY FORCES IN THE PLASTIC FLOW REGIME
DP Daroca, G Pasquini, GS Lozano, V Bekeris
Physical Review B 84 (2011), 012508
Editorial:American Physical Society, College Park
ISSN 0921-4526.

54*LOCAL TEMPERATURE GRADIENTS AND HEAT
FLOW IN QUANTUM DRIVEN SYSTEMS
Alvaro Caso, Liliana Arrachea, Gustavo S. Lozano,
Physical Reviw B 83 165419 (2011)
Editorial:American Physical Society, College Park
ISSN 0921-4526.

*53 A NOTE ON THE EXSITENCE OF SOLITON SOLUTIONS ON THE CP(N) MODEL.
L Sourrouile, A. Caso, G.S.Lozano
Mod.Phys.Lett.A26:637-646,2011.
ISSN: 0217-7323

*52 LOCAL TEMPERATURES AND EFFECTIVE TEMPARATURES IN QUANTUM DRIVEN SYSTEMS
Alvaro Caso, Liliana Arrachea, Gustavo S. Lozano,
Physical Review B 81, 041301(R) (2010)
Editorial:American Physical Society, College Park
ISSN 0921-4526.

*51 DEPINNING AND DYNAMICS OF AC DRIVEN VORTICES IN RANDOM MEDIA
D. P\'{e}rez Daroca, G. S. Lozano, G. Pasquini, V.Beckeris.
Physical Review B, 81, 184520 (2010)
Editorial:American Physical Society, College Park
ISSN 0921-4526.

*50 THERMAL TRANSPORT IN ONE-DIMENSIONAL SPIN HETEROSTRUCTURES
Liliana Arrachea, Gustavo S. Lozano, A. A. Aligia
Phys. Rev. B 81, 041301 (2010)
ISSN 0921-4526.

*49 ORDERED, DISORDERED AND COEXISTENCE STABLE VORTES LATTICESG.Pasquini, D.Perez Daroca, C.Chilliote, G.S.Lozano, V.Beckeris
Physical Review Letters 100, 247003 (2008)
Editorial:American Physical Society, College ParkISSN:0031-9007

48 NON-ABELIAN CHERN-SIMONS VORTICES
G. S. Lozano, D. Marques, E. F. Moreno, F. A. Schaposnik.
Physics Letters B654, 27 (2007)
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

47 HIGHER LOOP RENORMALIZATION OF A SUPERSYMMETRIC FIELD THEORY
Marc Bellon, Gustavo S Lozano, Fidel A Schaposnik.
Physics Letters B650, 293 (2007)
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

46 ENTANGLEMENT IN QUANTUM DISSIPATIVE ISING SPIN SYSTEMS
Gustavo S Lozano, Homero Lozza, Diego Perez Daroca.
Physica B398, 465 (2007)
Editorial: Elsevier, AmsterdamISSN 0921-4526.

45 AB INITIO ELECTRONIC CALCULATIONS FOR MN LINEAR CHAINS DEPOSITED ON
CUN/CU(001) SURFACES
* M.A.Barral, R. Weht, G.S.Lozano,A.M.LLois.
Physica B398, 369 (2007)
Editorial: Elsevier, Amsterdam.
ISSN 0921-4526.

44 ON 1+1 DIMENSIONAL GALILEAN SUPERSYMMETRY IN ULTRACOLD QUANTUM
GASES
G.S.Lozano, O.Piguet, F.A.Schaposnik, L.Sourrouille
Physical Review A 75, 23608. (2007)
Editorial: American Physical Society, College Park.
ISSN: 1050-2947 .

43 VORTEX SOLUTIONS IN THE NONCOMMUTATIVE TORUS
G.Lozano, D.Marques, F.A.Schaposnik
Journal of High Energy Physics 0609 (2006) 044
Editorial: Institute of Physics (IoP).
ISSN:1126-6708

42 STATIC PROPERTIES OF THE DISSIPATIVE RANDOM QUANTUM ISING FERROMAGNETIC CHAIN
Leticia F. Cugliandolo, Gustavo S. Lozano, Homero Lozza
Physical Review B 71, 224421 (2005).
Editorial: American Physical Society, College Park.
ISSN:1098-0121

41 NONRELATIVISTIC SUPERSYMMETRY IN NONCOMMUTATIVE SPACE
Gustavo S. Lozano, Olivier Piguet, Fidel A. Schaposnik, Lucas Sourrouille
Physics Letters B 630 (2005) 108-114.
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

40 MAGNETIC FLUX INDUCED SPIN POLARIZATION IN SEMICONDUCTOR MULTICHANNEL
RINGS WITH RASHBA SPIN ORBIT COUPLING
G. S. Lozano, M. J. Sánchez
Physical Review B 72 205315 (2005) .
Editorial: American Physical Society, College Park.
ISSN:1098-0121.

39 BOGOMOLNY EQUATIONS FOR VORTICES IN THE NONCOMMUTATIVE TORUS
P. Forgacs, G.S. Lozano, E.F. Moreno, F.A. Schaposnik
Journal High Energy Physics 0507 (2005) 074
Editorial: Institute of Physics (IoP) .
ISSN:1126-6708 .

38 MEMORY EFFECTS IN CLASSICAL AND QUANTUM MEAN-FIELD DISORDERED MODELS
L.F. Cugliandolo, G. Lozano, H. Lozza
European Physical Journal B41, 87, (2004)
Editorial: Springer Verlag, HeidelberISSN: 1434-6044
Gustavo Sergio Lozano, DNI 17 082 794 3

37 RASHBA COUPLING IN QUANTUM DOTS:EXACT SOLUTION,
(*)E.Tsitsihvili, G.Lozano, A.O.Gogolin,
Physical Review B 70, 115316 (2004)
Editorial: American Physical Society, College Park.
ISSN:1098-0121

36 EFFECTS OF DISSIPATION ON DISORDERED QUANTUM SPIN MODELS,
L.F.Cugliandolo, D.R.Grempel, G.Lozano, H.Lozza,
Physical Review B 70, 024422 (2004)
Editorial: American Physical Society, College Park.
ISSN:1098-0121


35 NON BPS NONCOMMUTATIVE VORTICES,
G.S.Lozano, E.F.Moreno, M.J. Rodriguez, F.A.Schaposnik
Journal of High Energy Physics, 0311, 049 (2003)
Editorial: Institute of Physics (IoP)
ISSN:1126-6708

34 A NOTE ON GAUSSIAN INTEGRALS OVER PARAGRASSMANN VARIABLES
Leticia F Cugliandolo, Gustavo S Lozano, Enrique F Moreno, Fidel A Schaposnik
International Journal of Modern Physics A,19,(2004),1705-1714.
Editorial: World Scientific, Singapore.
ISSN: 0217-751X

33 ANOMALIES IN NONCOMMUTATIVE DIPOLE FIELD TEHORIES
D.H.Correa, G.S.Lozano, E.F.Moreno, F.A.Schaposnik
Journal of High Energy Physics 0202, 031 (11 paginas) (2002)
Editorial: Institute of Physics (IoP)
ISSN:1126-6708

32 DISSIPATIVE EFFECTS ON QUANTUM GLASSY SYSTEMS
Leticia F. Cugliandolo, Daniel Grempel, Gustavo Lozano, Homero Lozza,
Constantino da Silva Santos
Physical Review B 66, 014444 (20 paginas), (2002)
Editorial: American Physical Society, College Park
ISSN:1098-0121

31 PARTICLE VORTEX DYNAMICS IN NONCOMMUTATIVE SPACE
D.Correa, G.S.Lozano, E.F.Moreno, F.A.Schaposnik
Journal of High Energy Physics 0111, 034 (12 paginas) (2001)
Editorial: Institute of Physics (IoP)
ISSN:1126-6708

30 COMMENTS ON THE U(2) NONCOMMUTATIVE INSTANTON
D.Correa, G.S.Lozano, E.F. Moreno, F.A. Schaposnik
Physics Letters B515, 206-212, (2001)
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

29 SELFDUAL CHERN-SIMONS SOLITONS IN NONCOMMUTATIVE SPACE.
G.S. Lozano, E.F. Moreno, F.A. Schaposnik.
Journal of High Energy Physics 0102 (2001) 036.
Editorial: Institute of Physics (IoP)
ISSN:1126-6708

28 NIELSEN-OLESEN VORTICES IN NONCOMMUTATIVE SPACE.
G.S . Lozano, E.F. Moreno, F.A. Schaposnik
Physics Letters B, 504,117-121, (2001)
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

27 SELF-DUAL GINZBURG-LANDAU VORTICES IN A DISK
G. S. Lozano, M. V. Manias, E. F. Moreno
Journal of Physics, A34, Mathematical and General,5721-5730, (2001)
Editorial: Insititue of Physics (IoP)
ISSN:0305-4470

26 REAL-TIME NON-EQUILIBRIUM DYNAMICS OF QUANTUM GLASSY SYSTEMS
Leticia F. Cugliandolo, Gustavo Lozano
Physical Review, B59,915, (1999)
ISSN:1098-0121
Editorial: American Physical Society, College Park.

25 QUANTUM AGEING IN MEAN FIELD MODELS
Leticia F. Cugliandolo, Gustavo Lozano
Physical Review Letters , 80, 4979-4982, (1998)
Editorial: American Physical Society, College Park.
ISSN:0031-9007

24 NONABELIAN CHERN-SIMONS PARTICLES IN AN EXTERNALMAGNETIC FIELD.
Serguei B. Isakov, Gustavo Lozano, Stephane Ouvry.
Nuclear .Physics B552: 677-706,1999
Editorial: North-Holland, Amsterdam.
ISSN:0550-3213

23 NONABELIAN STRING CONDUCTIVITY.
T.W.B. Kibble, G. Lozano, A.J.Yates
PhysicalReviewD56: 1204-1214,1997
Editorial: American Physical Society, College Park.
ISSN:0556-2821

22 SYMMETRY NONRESTORATION AND INVERSE SYMMETRY BREAKING ON THE LATTICE.
G. Bimonte, G. Lozano
Physics Letters B388: 692-701,1996
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

21 CAN SYMMETRY NONRESTORATION SOLVE THE MONOPOLE PROBLEM?
G. Bimonte, G. Lozano
Nuclear Physics B460: 155-166,1996
Editorial: North-Holland, Amsterdam.
ISSN:0550-3213

20 ON SYMMETRY NONRESTORATION AT HIGH TEMPERATURE.
G. Bimonte, G. Lozano
Physics Letters B366: 248-252,1996
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

19 UV ASYMPTOTICALLY FREE QED AS A BROKEN YM THEORY IN THE UNITARY GAUGE.
G. Bimonte, R. Iengo, G. Lozano.
Physics Letters B355: 277-282,1995
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

18 FINITE FERMION DENSITY EFFECTS ON THE ELECTROWEAK STRING.
G. Bimonte, G. Lozano.
Physics Letters B348:457-461,1995
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

17 Z FLUX LINE LATTICES AND SELFDUAL EQUATIONS IN THESTANDARD MODEL.
G. Bimonte, G. Lozano.
Physical Review D50: 6046-6049,1994.
Editorial: American Physical Society, College Park.
ISSN:0556-2821

16 VORTEX SOLUTIONS IN TWO HIGGS DOUBLET SYSTEMS.
G. Bimonte, G. Lozano.
Physics Letters B326: 270-275,1994
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

15 VORTICES IN CURVED SPACE-TIME.
J.D. Edelstein, G. Lozano, F.A. Schaposnik
Modern Physics Letters A8:3665-3672,1993
Editorial:World Scientific, Singapore.
ISSN:0217-7323

14 DIFFERENTIAL REGULARIZATION OF A NONRELATIVISTIC ANYONMODEL.
D.Z. Freedman, G. Lozano, N. Rius.
Physical Review D49:1054-1066,1994
Editorial: American Physical Society, College Park.
ISSN:0556-2821

13 AHARONOV-BOHM SCATTERING, CONTACT INTERACTIONS AND SCALE INVARIANCE.
O. Bergman, G. Lozano .
Annals of Physics 229: 416-427,1994
Editorial: Academica Press, New YorkISSN:0003-4916

12 NONTOPOLOGICAL SOLITONS IN CHERN-SIMONS SYSTEMS.
D. Bazeia, G. Lozano.
Physical Review D44: 3348-3351,1991
Editorial: American Physical Society, College Park.
ISSN:0556-2821

11 EXTENDED SUPERCONFORMAL GALILEAN SYMMETRY INCHERN-SIMONS MATTER
SYSTEMS.
M. Leblanc, G. Lozano, H. Min.
Annals of Physics 219:328-348,1992
Editorial: Academica Press, New YorkISSN:0003-4916

10 GROUND STATE ENERGY FOR NONRELATIVISTIC BOSONS COUPLED TO CHERN-SIMONS
GAUGE FIELDS.
Gustavo Lozano
Physics Letters B283: 70-74,1992
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

9 A COMMENT ON TOPOLOGICAL FIELD THEORY QUANTIZATION AND STOCHASTICPROCESSES.
L.F. Cugliandolo, G. Lozano, H. Montani, F.A. Schaposnik.
International Journal of Modern Physics A5: 3777-3786,1990
Editorial:World Scientific, Singapore.
ISSN:0217-751X

8 PATH INTEGRAL MEASURE FOR CHERN-SIMONS THEORY WITHIN THE STOCHASTIC
QUANTIZATION APPROACH.
L. F. Cugliandolo, G. Lozano, F.A. Schaposnik
Physics Letters B253: 90-96,1991.
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

7 PATH INTEGRAL MEASURE FOR TOPOLOGICAL FIELD THEORIES.
L. F. Cugliandolo, G. Lozano, F.A. Schaposnik.
Physics Letters B244: 249-254,1990 8
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

6 BOGOMOLNY EQUATIONS FOR NONABELIAN CHERN-SIMONS HIGGSTHEORIES.
L.F. Cugliandolo, G. Lozano, M.V. Manias, F.A. Schaposnik
Modern Physics Letters A6: 479-486,1991
Editorial:World Scientific, Singapore.
ISSN:0217-7323

5 ZERO MODES OF THE VORTEX FERMION SYSTEM: THE NONABELIAN CASE.
L.F. Cugliandolo, G. Lozano.
Physical Review D39: 3093-3095,1989.
Editorial: American Physical Society, College Park.
ISSN:0556-2821

4 A TOPOLOGICAL FIELD THEORY FOR NONABELIAN VORTICES.
Leticia Cugliandolo, Gustavo Lozano, Fidel A. Schaposnik.
Physics Letters B234: 52,1990
Editorial: North-Holland, Amsterdam.
ISSN:0370-2693

3 BOGOMOLNY EQUATIONS FOR NONABELIAN GAUGE THEORIES.
L.F. Cugliandolo, G. Lozano, F.A. Schaposnik
Physical Review D40: 3440-3446,1989
Editorial: American Physical Society, College Park.
ISSN:0556-2821

2 MOSSBAUER NULL REDSHIFT EXPERIMENT.
H. Vucetich, R.C. Mercader, G. Lozano, G. Mindlin, A.R. Lopez Garcia,
J.Desimoni.
Physical Review D38: 2930-2936,1988
Editorial: American Physical Society, College Park.
ISSN:0556-28