Showing posts with label propensities. Show all posts
Showing posts with label propensities. Show all posts

Sunday, March 26, 2017

Quantum mechanics and consciousness - Part 2/8: Substances and Multiple Levels in Quantum Mechanics

2. Substances and Multiple Levels in Quantum Mechanics


A substance is defined as what exists over the finite duration between measurement events. The problem in quantum mechanics of understanding how substances exist has been long-standing. Some like Everett have suggested it is the wave function which exists continuously, but wave functions are mathematical entities and not physical. Others like Bohr have said that only events are real and hence denied that there anything which could be a continuous substance. 

My proposal is use the idea of propensities [5]. These are the underlying dispositions or causes which give rise to events when the conditions are appropriate. The event production may be deterministic or probabilistic. The important feature of propensities is that they are present continuously between events, at least according to the Born Law of quantum mechanics.  Propensities, therefore, can be identified as the substance of which quantum particles are made. The wave function is then the form of those substances, in particular their form as spread out in space and time. Quantum objects are thus substances that manifest themselves in some kind of form. The form of something tells us what its present structure is, and the substance of something tells us how it would behave in all future hypothetical circumstances (even if only by probabilities).

We can develop a theory of multiple levels, each with different kinds of objects and each existing in their own kinds of spaces.  We can show how objects interact between levels [6]. We can begin to understand this using the principles of quantum mechanics. Consider, for example, how the Schroedinger equation makes predictions for the wave function, which in turn predicts the probabilities of future events. The Schroedinger equation uses a combination of kinetic energy and potentiality that acts to evolve the wave function through time, based on the initial conditions. The wave function then acts to produce further discrete selection events based on previous selections.  In each case, objects of kind of A are producing further objects of kind B(n) based on previous objects B(n-1). The produced B(n) outcomes select what kind of outcomes are next possible.  Furthermore, this same pattern is repeated on multiple levels {A ➝ B  C}.  Quantum physics has the levels  {energy   propensity forms  actual selections}.  Such patterns are familiar, since in classical physics we have a similar structure with the levels {potential energy  forces  acceleration}.  The pattern is also familiar to us from psychology in the sequence {desire  thinking  action}, as will be discussed later. 

When we start digging into quantum physics, we discover even more levels. The potential energy and kinetic energy that we started with in the Schroedinger equation are not themselves fundamental, but are generated by the virtual processes of quantum field theory. Potential energy is produced by the exchange of gauge bosons: of photons of electromagnetic energy, of gluons for nuclear energy, etc. And kinetic energy comes from mass, which is mostly not ‘bare mass’ but is the collection of the energies of virtual substances in a cloud around a given center.   This means that we have an even longer chain of multiple generative levels in quantum physics, something like {variational Lagrangian  virtual fields  virtual events  potential and kinetic energies in the Hamiltonian  propensity fields described by wave functions  selection events for actual outcomes}. 

These kinds of levels are generally acknowledged to exist within quantum field theory, but with differing opinions about their significance. Many physicists and philosophers of physics want to assert the particular ‘reality’ of one of the levels and say that the prior levels are ‘merely calculational devices’ for the behaviour of their chosen real level. The question of simplicity, to be answered in order to apply Occam’s razor, is whether it is simpler to have multiple kinds of objects existing (even within multiple generative levels) each with simple dispositions, or simpler to have fewer kinds of existing objects, but with more complicated laws governing their operation. 

      Allowing the multiple generative levels all to exist in ‘their own way’ has fruitful consequences for generalizing quantum physics to include new kinds of causation. Admittedly this is going beyond standard quantum mechanics, but at least this is yielding predictions for possible new science which can be confirmed or falsified as all science should be examined.

[5] I. Thompson, "Real Dispositions in the Physical World," Brit. Jnl Phil. Science, vol. 39, pp. 67-79, 1988.
[6] I. J. Thompson, "Derivative Dispositions and Multiple Generative Levels," in Probabilities, Causes and Propensities in Physics, Dordrecht, Springer, 2008, pp. 245-257.

Part 1 here.

Monday, May 11, 2015

Spiritual Physics




Streamed live on May 11, 2015
Is there a connection between spirituality and physics? What is the nature of the mind? In this episode, host Curtis Childs from the Swedenborg Foundation and featured guest and physicist Dr. Ian J. Thompson explore the answers to these questions from spiritual and scientific perspectives.

Discussion points:
--Meeting a Mind
--The Substance of Consciousness
--Energy and Distance
--Materialism Issues
--The Interaction of Planes

Special thanks to our featured guest Dr. Ian J. Thompson. Dr. Thompson is a nuclear physicist in the Nuclear Theory and Modeling Group at the Lawrence Livermore National Laboratory, USA, having until 2006 been a professor of physics at the University of Surrey, UK. His research deals with the coupled-channels and few-body models for nuclear structure and reactions, especially concerning halo nuclei. He is a fellow of the Institute of Physics.

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References and Downloads:
Check out "Starting Science From God: Rational Scientific Theories from Theism" by Ian J. Thompson

Wednesday, April 25, 2012

Is it All In The Mind?


It is commonly believed that quantum physics tells that 'all is in the mind', that 'we create our own reality', or that 'that everything outside our consciousness exists yet has no reality except in what we are making of it'. A recent film 'What the Bleep Do We Know' popularises this view, but makes many mistakes.


Physics motives for saying this:
A big problem in physics is that the wave functions that are spread out have a shape which satisfies well-known equations, but it is still not clear, when and how physics gets just one actual outcome. The electron may have a wave function spread out over the whole room, for example, but if you have detectors in the room, only one of them, at random, will detect the electron. In quantum physics, we do not have a good reason why an electron can only be found in one detector and not somehow in all of them. So there has been a lot of discussion in the past 70 years of how in physics the standard theory with waves just leads to one outcome. This has given rise to very many alternative ideas:.

1. Only an appearance
Everett,
2. Occurs to a good approximation
Decoherence theory,
3. Classical apparatus
N. Bohr,
4. Experimenter looks
W. Heisenberg,
5. Effect of consciousness
E. Wigner,
6. Consciousness creates an actual result
H. Stapp,
7. Consciousness produces nature
S. Malin,
8. Spirit produces nature
E. Swedenborg,
9. Nature is essentially spiritual
‘New Age’,
10. Nature and spirit are identical
C.J.S. Clarke,
11. Quantum physics shows us religious roots
E.H. Walker
Suggested means for getting one definite actuality


Those of you that have read some popular physics will recognize some of these alternatives, and they are all designed to answer the same measurement problem. The first suggestion is called Everett’s many-worlds interpretation, in which there is not any real selection, but all alternatives occur the same time, for example in some set of parallel universes. The second theory of ‘decoherence’ says that it really like that, but that it appears to a good approximation as if only one outcome occurs. Niels Bohr thought it was the fact that experimental apparatus was ‘classical’, with no wave behavior, that gives rise to a particular outcome. We now know that quantum physics applies to the experimental apparatus as well, so that does not really solve the problem. Werner Heisenberg, Eugene Wigner and Henry Stapp have in turn introduced the speculation that selection is something to do with consciousness or mind, and this has given rise to a whole stream of suggestions in which consciousness (or something) has become more and more involved in trying to solve the problem of quantum physics.


Wigner in a paper of 40 years ago suggested that it was the consciousness of the observing scientist, and this idea has been carried on by Stapp, who says that consciousness is actually involved in the brain. Stapp believes that since a quantum brain has many alternate things that can happen, consciousness selects one of these outcomes to produce a result. I have listed other alternatives here, which get progressively more ‘way out’. A few of these ideas we can imagine being true, for example that ‘spirit produces nature’, but some people have gone even further than that, and have said that nature is somehow essentially spiritual – that it is connected with, or equal to, the spiritual. Others have continued this theme to say that quantum physics is a way of learning about spirituality, a way to regain our spirituality. There is a great range of possible solutions here that try to solve the same problem: how something that is described by a wave can produce a definite outcome. The trouble starts from the fact that when physicists think about nature, they only have two ideas in mind: they can think of a wave or a particle. The difficulty is that the objects which quantum physics tells us are in nature are not just waves, and not just particles, so the challenge is to find a new understanding and a new picture.
In theistic science, we start by taking a realist view of the quantum world, as composed of dispositions or propensities in particular forms.

Philosophical motives for saying this:

As well as the more extreme ideas above, there are further ideas that have been proposed. James Jeans, the mathematical physicist, wrote about 60 years ago that “the wave function looks like not something solid and substantial, but looks more like an ‘idea’”. Some (e.g. Zohar) have taken this to mean that quantum physics tells us about ideas. Others, discussing the putative identity of spirit and nature, have tried to work out various ways for why they appear to be different. They have said that perhaps spirit and nature are different grades of energies, different frequencies, different dimensions, and/or different ‘fineness’ of material.
Theistic science will tell us that suggesting ‘different dimensions’ here is trying to use spatial analogies (thinking from ideas of space) to distinguish mind from nature. When people try to talk about ‘different frequencies’, they are using temporal analogies to think about this difference.

There is a strong impetus in much 'New Age' physics toward nondualism, in which our own consciousness is identified as 'essentially identical' to the Consciousness of the Source.

In the Spirituality Approach, I discuss whether nondualism can be true within Theism:
  1. How to distingush the Natural and Spiritual? here
  2. Is Nondualism the way to go beyond the physical? here
  3. How do we love others in a nondualism? here
  4. Is there esoteric knowledge about spirituality? here
  5. How can there be permanent spiritual growth? here
  6. What is Enlightenment without Paradox?
    Nondualism from a Theistic perspective, here.

In Theistic Science:

According to Theistic Science, the natural world is really and definitely produced by generative processes, of which spiritual and mental stages are intermediate parts. The natural world is not itself living or consciousness, but is produced in part by means of worlds and by people which are conscious.

Moreover, the physical world is not an arbitrary production, but is constrained at least by the past: by what already physically exists. We say that the natural world is the terminus and containant of spiritual processes, and is the base for the spiritual degrees as are the foundations for a house.

This has important philosophical, biological and theological consequences. It is most important as our actions in the physical world have the function of building up the permanence of our spiritual bodies, our souls.

There are important analogies between mental and physical processes, but these analogies do not indicate identity, as is often supposed, but arise from systematic correspondences of function.


To explain all these things within the context of science and theism, I have written my book Starting Science from God. The book website is www.beginningtheisticscience.com/ 


Wednesday, February 1, 2012

What is mind: Information or Substance?


Some philosophers, including Kenneth Sayre, David Chalmers & others, think that the existence of mind can be explained if only we could allow 'information' to exist in reality as a property alongside physical attributes such as mass, charge etc. This is taken then within  'neutral monism', whereby physical and mental are just two different ways of looking at what actually exists. They just consider different properties if some single (monistic) substantial reality.  This was advocated by Bertrand Russell, etc., and is increasingly popular today. It allows for 'property dualism', but not 'substantial dualism'.

In fact, such neutral monism has features that make it strange as a fundamental theory. I agree that it at first sounds good to have 'information' is the fundamental basis for both physical and mental realities. However, information is essentially mathematical and formal. That is what information essentially means. And anything mathematical cannot change! And one thing we know about the physical and mental worlds, is that there are causes and changes there. Furthermore, mathematics is necessary -- it cannot be otherwise -- but the world we live in is contingent -- it could be otherwise. This holds whether or not we believe in free will. To say that reality is made out of information is like going back to Pythagoras, whose follows took the world to be made out of triangles. That is all form and no substance. There is no actuality. Clearly not the best choice for theory of reality!

I insist, instead, that in order to understand the existence of physical and mental things, we need to treat them as actually existing. They cannot be merely concepts, hypotheses, forms, or information. We may describe some of them by mathematics but actual things are not constituted by mathematics. This amounts to taking an Aristotelian view of reality, wherein every real thing is some kind of substance and has powers for change. This can immediately be contrasted with an extreme Platonic view, wherein only ideal forms are real, and things in our world are merely some kind of image or shadow of those ideal forms.

Following Aristotle, we can analyze the nature of individual things. We see how they all have some form and are all composed of some matter (Greek hyle). I am going to say that objects all have some form, and that form is a form of some underlying substance or stuff. By the term ‘form’, I refer not just to the external shape of an object, but to all the internal structure and descriptive details necessary to make a full account of what actually exists at a given moment. Spatial structures are forms, and so also are any other structures needed, whether they are spatial or not. This use of the term ‘form’ refers only to static or categorical properties that can be attributed at any one time. It therefore excludes causal principles since these describe what might happen at later times. The form and substance of each thing can be intellectually distinguished, but they never exist apart in reality. It is never the case that the form of a thing is here and the substance of it is over there.

This is to adopt a realism that takes seriously the need for substance and also for changes and processes involving substantial objects. Each object cannot merely exist self-sufficiently but must be closely linked to others by causes and/or effects. We therefore need a serious account of how causes exist and operate and how the causal powers of objects are related to their substantial nature. Because science is continually discovering new kinds of causes and new ways of causation, the realism here is not a naive realism wherein we take as real just what appears to our senses. There are enormously many things and causes that science postulates that are not apparent to our senses but are inferred from empirical or theoretical considerations.

The present realism, because it stresses the leading role of causes and powers in generating new processes, is going to be called ‘generative realism.’ If we want a slogan, we could say
“No process without structure, no structure without substance, no substance without power, no power without process."

My slogan can indeed be interpreted physically. But it is not confined to what is physical, since I want to apply it to mental and spiritual things too, and also consider applying to what is divine (God). All I am doing here is to avoid purely formal accounts of these things as being complete descriptions: as well as form, we also need process, substance, power, etc. I want to avoid purely abstract descriptions of mind, or accounts which are purely mathematical! Certainly a mathematical theory of communication can exists as a description of the forms of things, but things are not themselves purely mathematical. Because I apply the slogan also to mental, spiritual and divine things, I do not follow a purely neutral monism. I see all physical, mental, spiritual and divine things as existing substances with powers, process and form each. These are not 'distinct levels of abstraction' of some single monist substance.

Many past descriptions have been more poetic than literal. So much so, that we wonder if true statements can be accurately made about what is 'mind' and 'spirit'. So I have been seeking to form a non-metaphorical account of the way God starts the process, and how it is carried on through spiritual and mental worlds to the physical realm. 

I admit that there are still questions concerning whether units of measure are even possible for these things. I am more inclined that science has to develop more towards a theory of dispositions (affordances) and qualities, even if there are no numbers to go with them. Think even now how cognitive modeling works in psychology: they examine structures and processing, even without the 'units of measure'.

The objects in minds certainly carry information, but they are much more than only information! For example, to describe something only by information tells you nothing about the propensities it has for various effects. This is the 'further' that you mention: objects can and should be characterized also by capability, productivity, potential actions, dispositions, etc. And that the specific actions depend on the form (in-form-ation) of the object. This is not impossibly difficult. Psychologists interested in preferences and motives do it all the time.

In order to understand more, we have to get a better idea of all the different kinds of desires and affections. I claim that all mental propensities / affordances / dispositions are in fact various desires and affections: that is what their substance really is. And every kind of thought and concept and information-in-the-mind has to be caused by some appropriate kind of desire: in particular, the desire for knowing that particular thing, and then for using it to produce the wanted effects. That is, each kind of concept stage of Piaget (etc) must be linked to an individual kind of desire and affection. That is were Erikson comes in: he examined the stages and levels of emotional (psychosocial) development. He did this independently, but I report in my book that his levels agree surprisingly well with Piaget's levels. (This agreement was first shown by John Gowan.)   Mental propensities are the true substance of the mind, not information.


In part, this is extracted from a forum at Skeptiko
that discusses my book "Starting Science From God"