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Quantum Measurements and Decoherence

Models and Phenomenology

  • Book
  • © 2000

Overview

Authors:
  1. Michael B. Mensky

    1. P.N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia

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Part of the book series: Fundamental Theories of Physics (FTPH, volume 110)

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Table of contents (11 chapters)

  1. Front Matter

    Pages i-xvi
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  2. Introduction

    1. Introduction

      • Michael B. Mensky
      Pages 1-12

  3. The Nature of Quantum Measurements

    1. Front Matter

      Pages 13-13
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    2. The Physics behind Quantum Measurements

      • Michael B. Mensky
      Pages 15-47

    3. Measurement induced uncertainties

      • Michael B. Mensky
      Pages 49-75

  4. Continuous Quantum Measurements: Theory

    1. Front Matter

      Pages 77-77
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    2. Continuous Quantum Measurements: The General Notion

      • Michael B. Mensky
      Pages 79-94

    3. Fuzzy Continuous Measurements: Phenomenology

      • Michael B. Mensky
      Pages 95-125

    4. Restricted Path Integrals: General Features

      • Michael B. Mensky
      Pages 127-142

  5. Continuous Quantum Measurements: Applications

    1. Front Matter

      Pages 143-143
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    2. The Monitoring of Energy

      • Michael B. Mensky
      Pages 145-160

    3. Monitoring by a series of observations

      • Michael B. Mensky
      Pages 161-174

    4. The Quantum Zeno effect in a passive setup

      • Michael B. Mensky
      Pages 175-185

  6. Conceptual Problems and Prospects

    1. Front Matter

      Pages 187-187
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    2. Restricted Path Integrals and the Philosophy of Quantum Mechanics

      • Michael B. Mensky
      Pages 189-197

    3. Conclusion: New Prospects

      • Michael B. Mensky
      Pages 199-200

  7. Back Matter

    Pages 201-231
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Keywords

About this book

Quantum measurement (Le., a measurement which is sufficiently precise for quantum effects to be essential) was always one of the most impor­ tant points in quantum mechanics because it most evidently revealed the difference between quantum and classical physics. Now quantum measure­ ment is again under active investigation, first of all because of the practical necessity of dealing with highly precise and complicated measurements. The nature of quantum measurement has become understood much bet­ ter during this new period of activity, the understanding being expressed by the concept of decoherence. This term means a physical process lead­ ing from a pure quantum state (wave function) of the system prior to the measurement to its state after the measurement which includes classical elements. More concretely, decoherence occurs as a result of the entangle­ ment of the measured system with its environment and results in the loss of phase relations between components of the wave function of the measured system. Decoherence is essentially nothing else than quantum measurement, but considered from the point of view of its physical mechanism and resolved in time. The present book is devoted to the two concepts of quantum measure­ ment and decoherence and to their interrelation, especially in the context of continuous quantum measurement.

Authors and Affiliations

  • P.N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia

    Michael B. Mensky

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