Observation: more decoherence or interference?

In summary, the conversation discusses the concept of decoherence and its role in manifesting macroscopic reality. It explores the effects of observation on decoherence and how it compares to the interaction with the observer. The question is raised whether what is directly sensed is due to the object's own decohered quantum nature or because of the observer's decoherence. Ultimately, it is clarified that decoherence is not related to observation and is instead a natural tendency of large quantum systems to behave classically.
  • #1
Loren Booda
3,125
4
Does observation decohere the object, or also interfere with the observer, to manifest macroscopic reality? A classical measurement might result either from equilibrium of object phase itself or of phase difference relative to the observer.

How, then, do these large-scale effects of object assimilation compare to those of interaction with the observer? What you sense directly - is it so because of its own decohered aggregate quantum nature, or because that other aggregate decohered along with you the observer?
 
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  • #2
NO, decoherence isn't to do with observation, a large quantum system will suffer decoherence before any measuremnt is made on it. It's just the tendency of very large quantum systems to behave classically.
 
  • #3


The concept of observation and its role in manifesting macroscopic reality is a complex and debated topic in quantum mechanics. There are different interpretations and theories that attempt to explain the relationship between observation and the behavior of quantum systems.

One possible interpretation is that observation causes decoherence, which is the process by which a quantum system becomes entangled with its environment and loses its quantum coherence. In this view, the act of measurement or observation forces the quantum system to collapse into a definite state, leading to the appearance of a classical reality.

On the other hand, some theories propose that observation not only decoheres the object, but also interferes with the observer. This means that the act of observation itself is a quantum process and can influence the behavior of the observer and the observed system. This idea challenges the traditional view of an objective reality independent of the observer.

The concept of equilibrium is also important in understanding the role of observation in manifesting macroscopic reality. In classical measurement, the result is determined by the equilibrium state of the object itself or the phase difference between the object and the observer. This suggests that the observer plays a crucial role in the measurement process and that the measurement outcome is not solely determined by the object.

In terms of large-scale effects, it is difficult to compare the effects of object assimilation and interaction with the observer. Both are important factors in the manifestation of macroscopic reality and cannot be separated. What we sense directly is a result of both the object's decohered quantum nature and the observer's interaction with it.

Overall, the role of observation in manifesting macroscopic reality is a complex and ongoing area of research in quantum mechanics. It is important to consider both the object and the observer when trying to understand the behavior of quantum systems.
 

1. What is decoherence in relation to observation?

Decoherence is the process by which a quantum system interacts with its surrounding environment, causing it to lose its quantum properties and behave more like a classical system. This can occur when a system is observed or measured, as the act of observation introduces interactions with the environment that disrupt the system's quantum state.

2. How does decoherence affect interference patterns?

Decoherence can cause interference patterns to disappear or become less distinct. This is because the interaction with the environment causes the quantum system to lose its coherence and behave more classically, leading to a loss of the interference effects that are characteristic of quantum systems.

3. Can decoherence be controlled or prevented?

Decoherence is a natural process that occurs in all quantum systems. However, certain measures can be taken to reduce its effects, such as isolating the system from its environment or using techniques like quantum error correction to protect against decoherence.

4. What is the relationship between decoherence and the observer effect?

The observer effect is the idea that the act of observing a system can change its behavior. Decoherence is one possible explanation for the observer effect, as the interaction between the quantum system and the observer's measurement apparatus can cause the system to lose its quantum properties and behave classically.

5. Is decoherence a problem for quantum computing?

Decoherence is one of the biggest challenges in the development of quantum computing, as it can cause errors and reduce the accuracy of calculations. Researchers are working on ways to mitigate the effects of decoherence in quantum computing systems, such as using error correction codes and developing more stable quantum systems.

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