Untitled

Pessoa, Osvaldo

doi:10.1023/a:1004994303863

Cited by 27 publications

(18 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We may therefore regard collapse models and decoherence not as mutually exclusive alternatives for a solution to the measurement problem, but rather as potential candidates for a fruitful unification. For a vague proposal along these lines, see Pessoa (1998); cf. also Diósi (1989) and for speculations that quantum gravity might act as a collapse-inducing universal "environment.…”

Section: Discussionmentioning

confidence: 99%

Decoherence, the measurement problem, and interpretations of quantum mechanics

2005

View full text Add to dashboard Cite

Environment-induced decoherence and superselection have been a subject of intensive research over the past two decades, yet their implications for the foundational problems of quantum mechanics, most notably the quantum measurement problem, have remained a matter of great controversy. This paper is intended to clarify key features of the decoherence program, including its more recent results, and to investigate their application and consequences in the context of the main interpretive approaches of quantum mechanics.

show abstract

Section: Discussionmentioning

confidence: 99%

Decoherence, the measurement problem, and interpretations of quantum mechanics

2005

View full text Add to dashboard Cite

show abstract

“…If only open systems may decohere, from this perspective the issue of the emergence of classicality in closed systems, in particular, in the Universe as a whole, cannot even be posed (see [41]). Zurek expresses the criticism to EID in the following terms: "the Universe as a whole is still a single entity with no 'outside' environment, and, therefore, any resolution involving its division into systems is unacceptable" ( [42], p.181).…”

Section: A the "Open-system" Problemmentioning

confidence: 99%

Decoherence: A Closed-System Approach

2013

View full text Add to dashboard Cite

The aim of this paper is to review a new perspective about decoherence, according to which formalisms originally devised to deal just with closed or open systems can be subsumed under a closed-system approach that generalizes the traditional account of the phenomenon. This new viewpoint dissolves certain conceptual difficulties of the orthodox open-system approach but, at the same time, shows that the openness of the quantum system is not the essential ingredient for decoherence, as commonly claimed. Moreover, when the behavior of a decoherent system is described from a closed-system perspective, the account of decoherence turns out to be more general than that supplied by the open-system approach, and the quantum-to-classical transition defines unequivocally the realm of classicality by identifying the observables with classical-like behavior.

show abstract

“…For example, Ghirradi and Bassi have shown that if one considers the linearity of the evolution of quantum systems and the orthogonality of pointer states of a macro-object, the superposition of pointer states of the apparatus is still allowed [10,11]. Pessoa mentions that a partial trace on environment degrees of freedom to obtain the reduced density matrix of the system is equivalent to a statistical version of the collapse of wave function in standard quantum mechanics [12]. Also, Adler points out that when quantum mechanics is applied uniformly to a system which is in interaction with a measuring apparatus and its environment, some kind of contradiction will arise about the interpretation of the final states of the apparatus, after the measurement process is completed [13].…”

Section: Introductionmentioning

confidence: 99%

Comparison between decoherence time for a two-state spin ½ system with its corresponding quantum retrieval period

Shafiee

Tirandaz

2011

Open Physics

View full text Add to dashboard Cite

Abstract:The evolution of a two-state quantum system (a spin ½ particle) in both the framework of standard quantum mechanics and under the decoherence regime is considered. The former approach on this issue is the well-known quantum flipping process of a dichotomic system subjected to a time-dependent magnetic field. In the latter approach, the Spin-Boson model is utilized to describe the interaction of system with its environment and the Born-Markov master equation is derived to obtain the decoherence time. It is possible to show that under certain conditions, one may find a potential conflict between the predictions of decoherence theory and the result observed in a typical quantum flipping experiment.PACS (2008

show abstract

Untitled

Cited by 27 publications

References 47 publications

Decoherence, the measurement problem, and interpretations of quantum mechanics

Decoherence, the measurement problem, and interpretations of quantum mechanics

Decoherence: A Closed-System Approach

Comparison between decoherence time for a two-state spin ½ system with its corresponding quantum retrieval period

Contact Info

Product

Resources

About