Entropy – Dreamyoga

Here is last night’s dream which is out of the blue and does not relate to the day to day of fence repair after another visit by the wild boars. Where this came from I have no clue.

I am walking through central London, Mayfair Piccadilly. It is a bright sunny day. I notice people converging on an ornate building in light coloured near white stone. It is a hybrid of Burlington House the old Royal Society of Chemistry where I spent many enjoyable hours in the library and of The Royal Society. People are gathering for some kind of scientific meeting. There is a mixture of academics and industry figures. I am not invited to this meeting. Through the doors and in the atrium I can see a reception desk which is being staffed by some women whom I used to know, a generation younger than me.

On a whim I walk in to say hi. They greet me and I ask if there is any chance of a cup of coffee. They get me one and warn me that it is not all that. I see that the conference is on “New Frontiers in Memory”. It has the theme of molecular architectures and memory and is of a think tank type of conjecture meeting. Rob walks in with one of the invited speakers who is a yank around 40. He is some kind of big cheese at the conference. Rob and I recognise each other after all these years. He introduces me to the speaker who is going to talk on protein molecular architectures and memory storage in the brain. He tells me that memory is all about entropy. You have to work against entropy to remember.

Rob invites me upstairs to look around. There are academic posters and a coffee service area. We queue and get a coffee and then stand at a pub style chest height table. In my mind’s eye I can see the way the cheese tries to address a memory array stored in a synthetic gel matrix. It is his way of modelling a wet memory, a mimic of biological memory which he seeks to incorporate into the next generation computers. I say to him that the encoding is of two types and that there are intrinsic and extrinsic entropies. The intrinsic entropy relates to where an individual amino acid is found along a protein chain and the pattern of its neighbour molecules. The extrinsic entropy is related to its local environment, degrees of folding and how space filling it is, how many gaps and voids are incorporated in the macroscopic protein structure. He says that he not previously thought about the molecular location entropy within a given protein strand. It might answer one of the questions he has. I can see in my mind’s eye an address matrix or tensor in mathematical form which defines coordinates for a given amino acid in a 3d protein amongst a wider gel matrix. The intrinsic lack of entropy is how a memory is stored. Memory works my comparing entropy. Anything not expected entropically is a memory. Low entropy is memory.

I say that the coffee is poor and that I hope they enjoy the meeting. I am off in search of a Starbucks, Costa or Caffè Nero.

The dream ends and I think WTF was that…

This dream came after watching Roger Penrose discus “before the big bang” on YouTube. He suggested that in a thermalized black body compliant universe evidenced by the cosmic microwave background energy spectrum where E=hν = mc², time or inverse time, frequency, does not exist in the absence of matter. “Time” can be curved to “before” the big bang of our current universe. Similarly at an infinitely expanded universe full only of radiation, photons, time again has no meaning without mass.

The dream starts in the refreshment area or bar off a hall full of poster presentations at a “perimeter” conference on quantum and quantum computing. I am talking with a “famous” prof in his early forties and he is holding court to some post docs and post grads. He is skinny with a beard and unruly hair. He is white. As far as he is concerned, I am a nobody.

I say to him that if I have understood it correctly the biggest drawback for quantum computing is qubit coherence time and thereby quantum fidelity. He says yes.

I say that a qubit is a counter-entropic state artificially manufactured in matter in many systems. In these matter based systems tremendous cooling is required to prevent coupling to the nearby thermal bath states which tend to bring about dephasing and lack of fidelity for the prepared qubit. He agrees.

I say that is why they need fuck off big fridges to get close to absolute zero, which is again a counter entropic state when viewed more than locally. He agrees.

That dephasing happens on a temperature and proximity dependent time scale.

I say that thermodynamics is a property of matter and hence time, without matter entropy as no meaning, nor does thermodynamics.

I ask him why nobody is pursuing fast or ultrafast time domain quantum computing? He does not reply.

I say to him if the prepared qubit state is addressed before dephasing occurs, we can use time to outwit or outpace thermalization to bath. Time domain quantum computing could be the answer.

He nods.

I say that the other problem stems from the cycle time of write to zero of the matter involved in the prepared qubits. It should be possible to use a second pulse similar to the state preparation one to reset the qubit clock on a hundreds of megahertz laser repetition rate. We then have a prepare and subsequent write to zero even if the qubit state has been used or partially used in computation. The matter is then ready for us to contravene entropy by writing a qubit.

As the dream ends, I think that it is a fair way from Guru Rinpoche.

Tag: Entropy

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