- Título:
- Paula Obando (UFF): Non-Markovian processes in open quantum systems
- quando:
- 07.12.2018 11.00 h
- onde:
- Sala A5-01 - Niteroi
- Categoria:
- Seminários

Data: Sexta-Feira 07/12/2018, Sala A5-01, 11 am.

Palestrante: Paola A. Concha Obando (UFF)

Title: Non-Markovian processes in open quantum systems.

Abstract: Recent developments about the problem of decoherence in

quantum mechanics have heightened

the need for the consistent description of open quantum systems [1, 2].

The theory of open quantum

systems is fundamental to describe a wide range of applications of

quantum physics, since perfect isolation

of quantum systems is not possible and since a complete microscopic

description or control of the

environmental degrees of freedom is not feasible or only partially so.

Under certain conditions, there is

a well-established treatment of the dynamics of open quantum systems in

which the open system’s time evolution is represented

by Markovian quantum master equation, which is obtained if one assumes a

weak coupling system-environment interaction.

On the other hand, in many scenarios, a large separation between system

and environment time scales can no longer be assumed,

leading to non- Markovian behavior and eventually a back-flow of

information from the environment into the system.

Basically, two main questions need to be discussed in this context [3]:

• What is a quantum Markovian process and hence what are non-Markovian

processes?

(characterization problem).

• If a given process deviates from Markovianity, by how much does it

deviate? (quan-

tification problem).

In this seminar, I intend to discuss these questions, showing some

results that were part my PhD research at Universidade Federal

Fluminense and our last results in the non-Markovian quantification

through quantum coherence, from a theoretical and experimental point of

view [3,4].

[1] BREUER, H.-P.; PETRUCCIONE, F. The theory of open quantum systems.

Oxford University Press on Demand, 2002.

[2] RIVAS, A.; HUELGA, S. F.; PLENIO, M. B. Quantum non-markovianity:

characterization, quantification and detection. Reports on Progress in

Physics, IOP Publishing, v. 77, 2014.

[3] PAULA, F. M.; OBANDO, P. C.; SARANDY, M. S. Non-markovianity through

multipartite correlation measures. Physical Review A, APS, v. 93, n. 4,

2016.

[4] PASSOS, M. ; OBANDO, P. C. ; BALTHAZAR, W. F. ; PAULA, F. M. ;

HUGUENIN, J. A. O. ;

SARANDY, M. S. . Non- Markovianity through quantum coherence in an

all-optical setup (Preprint) arXiv:1807.05378 [quant-ph], 2018.

- Grupo:
- Sala A5-01
- Rua:
- Instituto de Física da UFF
- CEP:
- 24210-346
- Cidade:
- Niteroi
- UF:
- RJ
- País:

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