## Decoherence and the Appearance of a Classical World in Quantum TheoryErich Joos, H. Dieter Zeh, Claus Kiefer, Domenico J. W. Giulini, Joachim Kupsch, Ion-Olimpiu Stamatescu Springer Science & Business Media, 9 ÁÕ.¤. 2013 - 496 Ë¹éÒ When we were preparing the first edition of this book, the concept of de coherence was known only to a minority of physicists. In the meantime, a wealth of contributions has appeared in the literature - important ones as well as serious misunderstandings. The phenomenon itself is now experimen tally clearly established and theoretically well understood in principle. New fields of application, discussed in the revised book, are chaos theory, informa tion theory, quantum computers, neuroscience, primordial cosmology, some aspects of black holes and strings, and others. While the first edition arose from regular discussions between the authors, thus leading to a clear" entanglement" of their otherwise quite different chap ters, the latter have thereafter evolved more or less independently. While this may broaden the book's scope as far as applications and methods are con cerned, it may also appear confusing to the reader wherever basic assumptions and intentions differ (as they do). For this reason we have rearranged the or der of the authors: they now appear in the same order as the chapters, such that those most closely related to the "early" and most ambitious concept of decoherence are listed first. The first three authors (Joos, Zeh, Kiefer) agree with one another that decoherence (in contradistinction to the Copen hagen interpretation) allows one to eliminate primary classical concepts, thus neither relying on an axiomatic concept of observables nor on a probability interpretation of the wave function in terms of classical concepts. |

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In all these cases, this conclusion requires that the quasi-classical states (or “

In all these cases, this conclusion requires that the quasi-classical states (or “

**pointer**states” in measurements) are robust (dynamically stable) under natural decoherence, as pointed out already in the first paper on decoherence (Zeh ... Ë¹éÒ 20

The states |qbn), representing different

The states |qbn), representing different

**pointer**positions, must approximately be mutually Orthogonal, and “classical” in the explained sense. Because of the dynamical superposition principle, an initial superposition XD coln) does not ... Ë¹éÒ 21

A macroscopic measurement device is always asssumed to decohere into its macroscopic

A macroscopic measurement device is always asssumed to decohere into its macroscopic

**pointer**states. However, environment-induced decoherence by itself does not yet solve the measurement problem, since the “**pointer**states” pm) may be ... Ë¹éÒ 26

Quantum measurement of a superposition |a) +|b) by means of a collapse process, here assumed to be triggered by the macroscopic

Quantum measurement of a superposition |a) +|b) by means of a collapse process, here assumed to be triggered by the macroscopic

**pointer**position. The initial entropy is smaller by one bit than in Fig. 2.1 (and may in principle vanish), ... Ë¹éÒ 27

(2.4) Here, |n) corresponds to the states |a) or b) used in the figures, the

(2.4) Here, |n) corresponds to the states |a) or b) used in the figures, the

**pointer**positions |p,) to the states |p A) and be). (During non-ideal measurements, the state |n) would change, too.) However, applied to an initial ...### ¤ÇÒÁ¤Ô´àËç¹¨Ò¡¼ÙéÍ×è¹ - à¢ÕÂ¹º·ÇÔ¨ÒÃ³ì

#### LibraryThing Review

º·ÇÔ¨ÒÃ³ì¨Ò¡¼Ùéãªé - fpagan - LibraryThingDecoherence theory explains why quantum weirdness (superposition, entanglement, etc) is absent at the macroscopic level (except for such exotica as superfluidity, superconductivity, and Bose-Einstein ... ÍèÒ¹¤ÇÒÁ¤Ô´àËç¹©ºÑºàµçÁ

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41 | |

Decoherence in Quantum Field Theory | 181 |

Consistent Histories and Decoherence | 227 |

Superselection Rules and Symmetries | 259 |

Open Quantum Systems | 316 |

Stochastic Collapse Models | 357 |

Related Concepts and Methods | 383 |

A1 Equation of Motion of a Mass Point | 394 |

Green Functions | 402 |

A4 Quantum Correlations | 415 |

A6 Galilean Symmetry | 425 |

A7 Stochastic Processes | 432 |

Stochastic Differential Equations | 439 |

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algebra approximation assumed atom Brownian motion Chap classical coherence commute components concept configuration consistent histories corresponding coupling decay decohered decoherence decoherence functional defined degrees of freedom density matrix dependence derived described Diósi discussed distribution dynamics eigenstates energy ensemble entanglement entropy environment environmental decoherence equation of motion evolution example expectation values factor field finite formal Ghirardi given Hamiltonian Heisenberg picture Hence Hilbert space initial interaction interference interpretation Joos Kiefer leads linear macroscopic master equation means molecules momentum Neumann nonlocal observables oscillator parameter particle phase space photon physical pointer position probability projection operators projectors properties pure quantum mechanics quantum theory quantum Zeno effect reduced density matrix represent representation result rotation scattering Schrödinger equation Sect spatial statistical operator subspaces subsystem superposition principle superselection rules superselection sectors theorem tion transition unitary variables vector wave function wave packets Wigner function Zeno effect Zurek