Nicholas Hedges

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Disordered Time

June 27, 2022 by Nicholas Hedges

In my last post I talked about entropy, in particular with reference to a book I’ve recently re-read by Carlo Rovelli called ‘The Order of Time’. I ended with the question (one as much for myself as anyone else); what has this got to do with my work?

So, here goes with (the beginnings of) an answer.

As I’ve said, my work has often sought to imagine past moments as if they are ‘now’ in order to better empathise with those who lived at the time; in particular those who lived through traumatic events.

Borrowing from the world of physics and what I’ve gleaned about entropy, I can look at a past moment as something which has a very low entropy (and here, of course, I’m using these terms in a loose,  ‘poetic’ way rather than anything scientific). The past is like the sandcastle as opposed to the pile of sand (but with far fewer possible configurations of state than the castle).

This is because the past moment has happened and therefore its form is fixed; there are no different configurations by which it can enter the next moment as the next moment has also already happened. If we think of the moment we are living now, then we can think of it as having very high entropy as there are countless possible configurations by which we, as people living in this particular moment, can enter the next and so on. We are like the pile of sand as opposed to the castle.

Below is a photograph taken in Oxford in 1897 to celebrate Queen Victoria’s Diamond Jubliee.

Queen Victoria's Diamond Jubilee, Oxford 1897
© Oxfordshire County Council

I want to look at this photograph as being illustrative of a moment in time rather than as an object in its own right. So what do we see?

If we are going to try and recreate a past moment, we have to try and think of that moment as it happens, not as it was. So, when I look at an image like this, at a moment frozen in time 125 years ago, I try to imagine the scene just before the image was taken and for a short while after. To do that, I might zoom in on a detail – one of the people – and imagine them moving. I imagine the noise of the scene, the sounds they might have heard and think about what they might have been saying (if anything).

Detail from a scene in Oxford, 1897
Detail from a scene in Oxford, 1897
Detail from a scene in Oxford, 1897

It’s easy to animate the faces above, but to animate the moment, I have to zoom out a little, to catch more of the scene around them. If we look at the boy in the first image for example, we can see that he is standing with a girl and a small boy. The girl is clearly talking to him but his eyes are on the camera. The small boy beside her looks impatient as if he wants to be doing something else.

Detail from a photograph taken in Oxford in 1897

And we can continue to zoom out and allow more of the moment to reveal itself.

Detail from a scene in Oxford, taken in 1897

One thing I do find with photographs like this, is that it’s often those people who are in the background and who are completely oblivious to the picture being taken that allow me to animate the scene. For example, this man (below) up a ladder adjusting the bunting.

Detail of a photograph taken in Oxford in 1897

One can imagine him working and the effort he is making and the fact he’s unaware that he is part of the picture allows me to reach beyond the edges of the photograph. It’s as if, through his being unaware of the photograph, the boundaries of the photograph are dissolved and the moment is given rein to move (a piece I made as part of my MA several years ago – Creatures –  is concerned with this very idea).

But what has  this all got to do with entropy?

The present moment has ‘high entropy’ in that the number of possible configurations (the different configurations that our blurred vision does not distinguish between) which will take this moment into the next are vast. But for a past moment, such as the one above, the number is practically zero, in that the moment has come and gone. It’s ‘entropy’ is very low. So if we are to try and imagine this moment in 1897 as if it’s now, we have to ‘disorder time’ and imagine the scene as if its ‘entropy’ is as high as he moment in which we now exist.

In a post from several years ago (Windows, Bicycles and Catastrophe) I talked about these background details and how they can help bring a past moment to life.

In the picture above, the horses and carts locate the photograph in the early 1900s but it’s the windows – the open windows – which help me locate myself in the time. Why? Because the rooms behind the windows are spaces outside the photograph; spaces oblivious to the photograph being taken. It’s as if they have escaped the moment frozen by the camera. The open windows also speak of a time before the photograph was taken and therefore give the photograph a sense of duration which, like the rooms behind them, also extend the boundaries of the image. When the photographer took the photo, the windows had been open a while beforehand; people had (obviously) opened them and I can begin to imagine those moments. I can imagine being in one of those rooms, looking out through the open window and seeing the horses down on the street and hearing the sounds of the city. These open windows therefore can help us see the past moment as it happens rather than as it was. They ascribe the picture a duration and give it flow.

In his book, The Order of Time, Carlo Rovelli writes: “The growth of entropy itself happens to open new doors through which entropy can increase further.” In the case of this image, Rovelli’s doors are our windows but the effect is the same. We begin to disorder time and locate among these details, pockets of potential. Instead of everything being fixed, there is room for manoeuvre, for change; entropy increases.

As I wrote in my previous post: …our blurred view of the world equates to our recognition of things as things; objects with form, and it’s because of this that we experience the flow of time; the sandcastle collapsing on the beach and the castle falling slowly to ruin. 

This blurring is the term used to describe how we perceive the world. We see things as particular (things as things; objects with form as opposed to how they are at the microscopic level). Rovelli writes: “The notion of particularity is born only at the moment we begin to see the universe in a blurred and approximate way. Boltzmann has shown that entropy exists because we describe the world in a blurred fashion. He has demonstrated that entropy is precisely the quantity that counts how many are the different configurations that our blurred vision does not distinguish between.”

In the case of the past itself and our view of it, our ‘blurred view’ is that of the object, the photograph, the relic. It is the knowledge we derive from sources; diaries, letters etc.

Rovelli continues: “The difference between past and future is deeply linked to this blurring. So, if I could take into account all the details of the exact, microscopic state of the world, would the characteristic aspects of the flowing of time disappear? Yes. If I observe the microscopic state of things, then the difference between past and future vanishes.”

A quote from William Blake is pertinent to this point: “If the doors to perception were cleansed, then everything would appear to man as it is – infinite.”

If then, we imagine the entirety of the past as being akin to the world at the microscopic level, then as we look beyond what our blurred vision allows us to see of the past (beyond the relics and artefacts) and see the details (for example, the rooms beyond the windows), then, just as at the microscopic level, where the difference between past and future collapses, so it does when we focus our attention on those seemingly insignificant details; details which we might well experience in our own, everyday lives.

One aspect I want to return to is the flow of time. As I wrote above: “These open windows therefore help us see the past moment as it happens rather than as it was. They ascribe the picture a duration and give it flow.” But this will have to wait for my next post.

Filed Under: Time

Entropy

June 26, 2022 by Nicholas Hedges

My work has often involved an exploration of time, in particular, how we can best imagine a past moment as ‘now’. Recently I’ve been re-reading Carlo Rovelli’s ‘The Order of Time’ and have been particularly interested in entropy and the part it plays in the fact time always flows from the past towards the future.

But what is entropy and what has it got to do with time? Well, the answer is complex and would require a book to answer it properly. However, as a layman, and as far as I understand it, entropy is, at a very basic level, the measurement of how much atoms in a given substance are free to spread out, move and arrange themselves in random ways.

As ever, Professor Brian Cox describes it perfectly here:

The difference between past and future lies in this “natural disordering that leads to gradually less particular, less special structures” [Rovelli, The Order of Time]; structures like the piles of sand as opposed to the sandcastle.

One aspect of Rovelli’s book I took a while to grasp was the idea of ‘blurring’. Rovelli asks the question, why do phenomena that we observe around us in the cosmos begin in a state of lower entropy in the first place. He describes a pack of cards:

“If the first twenty-six cards in a pack are all red and the next twenty-six are all black, we say that the configuration of the cards is particular; that it is ordered. This order is lost when the pack is shuffled. The initial ordered configuration is a configuration ‘of low entropy. But notice that it is particular if we look at the colour of the cards – red or black. It is particular because I am looking at the colour. Another configuration will be particular if the first twenty-six cards consist of only hearts and spades. Or if they are all odd numbers, or the twenty- six most creased cards in the pack, or exactly the same twenty-six of three days ago … Or if they share any other characteristic.

If we think about it carefully, every configuration is particular; every configuration is singular, if we look at all of its details, since every configuration always has something about it that characterises it in a unique way. Just as, for its mother, every child is particular and unique. It follows that the notion of certain configurations being more particular than others (twenty-six red cards followed by twenty-six black, for example) makes sense only if I limit myself to noticing only certain aspects of the cards (in this case, the colours). If I distinguish between all the cards, the configurations are all equivalent: none of them is more or less particular than others. The notion of ‘particularity’ is born only at the moment we begin to see the universe in a blurred and approximate way.

The notion of particularity, is born only at the moment we begin to see the universe in a blurred and approximate way. Boltzmann has shown that entropy exists because we describe the world in a blurred fashion. He has demonstrated that entropy is precisely the quantity that counts how many are the different configurations that our blurred vision does not distinguish between.”

The difference between past and future is deeply linked to this blurring. So, if I could take into account all the details of the exact, microscopic state of the world, would the characteristic aspects of the flowing of time disappear? Yes. If I observe the microscopic state of things, then the difference between past and future vanishes.

The future of the world, for instance, is determined by its present state – though neither more nor less than is the past. We often say that causes precede effects and yet, in the elementary grammar of things, there is no distinction between ’cause’ and ‘effect’.”

It was this line which took me a while to grasp: “He has demonstrated that entropy is precisely the quantity that counts how many are the different configurations that our blurred vision does not distinguish between.”

If we think back to the sandcastle and the pile of sand we can imagine the number of different configurations of each and can easily imagine that the number of configurations for the castle are far, far fewer than of the pile of sand. The castle therefore has few configurations that our ‘blurred vision does not distinguish between’ (low entropy) as opposed to the sand pile (high entropy).

As far as I understand it then, our blurred view of the world equates to our recognition of things as things; objects with form, and it’s because of this that we experience the flow of time; the sandcastle collapsing on the beach and the castle falling slowly to ruin.

But what has this to do with my work?

See my next blog post to find out.

Filed Under: Time

© Nicholas Hedges 2006-20

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