People From Belfast

"More generally, the hidden variable account of a given system becomes entirely different when we remember that it has undoubtedly interacted with numerous other systems in the past and that the total wave function will certainly not be factorable. The same effect complicates the hidden variable account of the theory of measurement, when it is desired to include part of the 'apparatus' in the system. Bohm of course was well aware of these features of his scheme, and has given them much attention. However, it must be stressed that, to the present writer's knowledge, there is no proof that any hidden variable account of quantum mechanics must have this extraordinary character. It would therefore be interesting, perhaps, to pursue some further 'impossibility proofs,' replacing the arbitrary axioms objected to above by some condition of locality, or of separability of distant systems."

"The theorem tells you that maybe there must be something happening faster than light, although it pains me even to say that much. The theorem certainly implies that Einstein's concept of space and time, neatly divided up into separate regions by light velocity, is not tenable. But then, to say that there's something going faster than light is to say more than I know."

"It can be argued that in trying to see behind the formal predictions of quantum theory we are just making trouble for ourselves. Was not precisely this the lesson that had to be learned before quantum mechanics could be constructed, that it is futile to try to see behind the observed phenomena?"

"The discomfort that I feel is associated with the fact that the observed perfect s seem to demand something like the ‘genetic’ hypothesis [identical twins, carrying with them identical genes]. For me, it is so reasonable to assume that the photons in those experiments carry with them programs, which have been correlated in advance, telling them how to behave. This is so rational that I think that when Einstein saw that, and the others refused to see it, he was the rational man. The other people, although history has justified them, were burying their heads in the sand. I feel that Einstein’s intellectual superiority over Bohr, in this instance, was enormous; a vast gulf between the man who saw clearly what was needed, and the obscurantist. So for me, it is a pity that Einstein’s idea doesn’t work. The reasonable thing just doesn’t work."

"1 + P(b, c) ≥ |P(a, b) － P(a, c)|"

"A final moral concerns terminology. Why did such serious people take so seriously axioms which now seem so arbitrary? I suspect that they were misled by the pernicious misuse of the word ‘measurement’ in contemporary theory. This word very strongly suggests the ascertaining of some preexisting property of some thing, any instrument involved playing a purely passive role. Quantum experiments are just not like that, as we learned especially from Bohr. The results have to be regarded as the joint product of ‘system’ and ‘apparatus,’ the complete experimental set-up."

"Bohr was inconsistent, unclear, willfully obscure and right. Einstein was consistent, clear, down-to-earth and wrong."

"To know the quantum mechanical state of a system implies, in general, only statistical restrictions on the results of measurements. It seems interesting to ask if this statistical element be thought of as arising, as in classical statistical mechanics, because the states in question are averages over better defined states for which individually the results would be quite determined. These hypothetical 'dispersion free' states would be specified not only by the quantum mechanical state vector but also by additional 'hidden variables' - 'hidden' because if states with prescribed values of these variables could actually be prepared, quantum mechanics would be observably inadequate."

"The concept of 'measurement' becomes so fuzzy on reflection that it is quite surprising to have it appearing in physical theory at the most fundamental level... does not any analysis of measurement require concepts more fundamental than measurement? And should not the fundamental theory be about these more fundamental concepts?"

"I am a Quantum Engineer, but on Sundays I Have Principles."

"The first charge against 'measurement', in the fundamental axioms of quantum mechanics, is that it anchors there the shifty split of the world into 'system' and 'apparatus'. A second charge is that the word comes loaded with meaning from everyday life, meaning which is entirely inappropriate in the quantum context."

"The idea that elimination of coherence, in one way or another, implies the replacement of 'and' by 'or', is a very common one among solvers of the 'measurement problem'. It has always puzzled me."

"While the founding fathers agonized over the question 'particle' or 'wave', de Broglie in 1925 proposed the obvious answer 'particle' and 'wave'. Is it not clear from the smallness of the scintillation on the screen that we have to do with a particle? And is it not clear, from the diffraction and interference patterns, that the motion of the particle is directed by a wave? De Broglie showed in detail how the motion of a particle, passing through just one of two holes in screen, could be influenced by waves propagating through both holes. And so influenced that the particle does not go where the waves cancel out, but is attracted to where they cooperate. This idea seems to me so natural and simple, to resolve the wave-particle dilemma in such a clear and ordinary way, that it is a great mystery to me that it was so generally ignored."

"I told Wheeler that I had had a number of conversations with Bell about quantum theory. "He’s a wonderful fellow," Wheeler noted. "Did he say to you," Wheeler asked, laughing, "‘I’d rather be clear and wrong, than foggy and right’?" I told Wheeler that Bell had not used exactly those words, but that it certainly sounded like him. I also told Wheeler that from the time that Bell began to study the quantum theory, he had conceptual problems with it, and that I had asked Bell if, at that time, he thought that the theory might simply be wrong—to which Bell had answered, "I hesitated to think it might be wrong, but I knew that it was rotten." At this, Wheeler burst into a marvelous peal of laughter. The idea of the young Bell rebelling against the "rottenness" of the quantum theory struck Wheeler as incredibly funny."

"Theoretical physicists live in a classical world, looking out into a quantum-mechanical world. The latter we describe only subjectively, in terms of procedures and results in our classical domain."

"John S. Bell (1928–1990, right) and I at in Bell’s office 10 years after the neutrino experiment. We were the quasi-official theorists of that experiment. We did not do very well, all things considered, because of inexperience and ignorance. After the experiment, in 1963, we both went to SLAC, where I wrote my computer program and he developed his famous inequalities. We also discussed other things, even wrote a paper together that was never published. He considered his work on the fundaments of quantum mechanics as a hobby, mainly to be done in the evening, at home. He told me that he intended to do away definitely with this nonsense of hidden variables, and so he did. Later he drifted more and more into this subject, and as I consider it as some sort of foolishness not good for anything having to do with the real world, I once asked him: “Why are you doing this? Does it make the slightest difference in the calculations such as I am doing?” To which he answered: “You are right, but are you not interested and curious about the interpretation?” He was right too, up to a point. While his work became very important, as it could be verified by experiment, often in this branch of physics the discussions are on the level of finding out how many angels can dance on the point of a needle. But even so: there are interesting things there."

"In a theory in which parameters are added to quantum mechanics to determine the results of individual measurements, without changing the statistical predictions, there must be a mechanism whereby the setting of one measuring device can influence the reading of another instrument, however remote. Moreover, the signal involved must propagate instantaneously, so that such a theory could not be Lorentz invariant. Of course, the situation is different if the quantum mechanical predictions are of limited validity. Conceivably they might apply only to experiments in which the settings of the instruments are made sufficiently in advance to allow them to reach some mutual rapport by exchange of signals with velocity less than or equal to that of light. In that connection, experiments of the type proposed by Bohm and Aharonov, in which the settings are changed during the flight of the particles, are crucial."

"Surely, after 62 years, we should have an exact formulation of some serious part of quantum mechanics? By 'exact' I do not of course mean 'exactly true'. I mean only that the theory should be fully formulated in mathematical terms, with nothing left to the discretion of the theoretical physicist . . . until workable approximations are needed in applications. By 'serious' I mean that some substantial fragment of physics should be covered. Nonrelativistic 'particle' quantum mechanics, perhaps with the inclusion of the electromagnetic field and a cut-off interaction, is serious enough."

"I agree with them about that: ORDINARY QUANTUM MECHANICS (as far as I know) IS JUST FINE FOR ALL PRACTICAL PURPOSES. Even when I begin by insisting on this myself, and in capital letters, it is likely to be insisted on repeatedly in the course of the discussion. So it is convenient to have an abbreviation for the last phrase: FOR ALL PRACTICAL PURPOSES = FAPP."

"The difference between loneliness and mere solitariness, after all, is that the lonely sensibility wants to be otherwise. There is a reaching out that never quite touches. In MacNeice’s best work, the ingeniousness and inevitable failure of that reaching indicates the depth of the longing. He is a superb love poet, for instance, yet his love poems often foreground their own ephemerality, like ice sculptures in the summertime."

"The elegance in MacNeice's poetry is more one of sensuality now and less one of ingenuity, and the poems he is writing are the experiences of a lonely contemplative person, occupied with himself and with the world we share."

"O early one morning I walked out like Agag, Early one morning to walk through the fire Dodging the pythons that leaked on the pavements With tinkle of glasses and tangle of wire."

"I am not yet born; forgive me For the sins that in me the world shall commit, my words When they speak me, my thoughts when they think me, My treason engendered by traitors beyond me, My life when they murder by means of my Hands, my death when they live me."

"Then twangling their bibles with wrath in their nostrils From Bonehill Fields came Bunyan and Blake: "Laredo the golden is fallen, is fallen; Your flame shall not quench nor your thirst shall not slake.""

"Though patriotism includes a sentimental, as it were a family, feeling for place, we can distinguish the ethical motive from the sentimental. At certain times in certain countries there has been a moral urgency to be patriotic when the actual or ideal policy of a man’s nation has been a sine qua non for his conscience. But to-day patriotism, in so far as it means subordination to a specifically national policy, is superannuated. This war, we assume, is not being fought-not by most of us-for any merely national end; we are fighting it, primarily and clearly, for our lives, and secondarily, and, alas! vaguely, for a new international order."

"Some on commission, some for the love of learning, Some because they have nothing better to do Or because they hope these walls of books will deaden The drumming of the demon in their ears."

"I am not yet born; O hear me. Let not the bloodsucking bat or the rat or the stoat or the clubfooted ghoul come near me."

"Politics: distrust all parties but consider capitalism must go."

"It’s no go the Yogi-Man, it’s no go Blavatsky, All we want is a bank balance and a bit of skirt in a taxi."

"In my own prejudice ... I would have of a poet ... whose worlds would not be too esoteric ... fond of talking ... capable of pity and laughter ... appreciative of women ... involved in personal relationships ... susceptible to physical impressions..."

"It’s no go my honey love, it’s no go my poppet; Work your hands from day to day, the winds will blow the profit. The glass is falling hour by hour, the glass will fall for ever, But if you break the bloody glass you won’t hold up the weather."

"If the term “poet's poet” means a poet whose virtuosity can be fully appreciated only by other poets, it may be applied to MacNeice. But if it were taken to imply that his work cannot be enjoyed by the larger public of poetry readers, the term would be misleading. He had the Irishman's unfailing ear for the music of verse, and he never published a line that is not good reading. I am very proud of having published the first volume he had to offer after coming down from the university."

"Where skill will no longer languish nor energy be trammelled To competition and graft, Exploited in subservience but not allegiance To an utterly lost and daft System that gives a few at fancy prices Their fancy lives, While ninety-nine in the hundred who never attend the banquet Must wash the grease of ages off the knives."

"And in a disused shed in Co. Wexford, Deep in the grounds of a burnt-out hotel, Among the bathtubs and the washbasins A thousand mushrooms crowd to a keyhole."

"It's practically my subject, my theme: solitude and community; the weirdness and terrors of solitude: the stifling and consolations of community. Also, the consolations of solitude."

"Include me in your lamentations."

"Are they gay buses?"

"Taigs don't pay rates."

"[it] shows that some loyalist paramilitaries are looking ahead and contemplating what needs to be done to maintain our separate Ulster identity - a "very valuable return to reality" he added."

"They are poofs. I don't care if they are ratepayers. As far as I am concerned they are perverts."

"5,000 subhuman animals."

"Northern Ireland has always been, part of Britain."

"I can kick your ass, so shut the fuck up! Who ever put out a magazine about you? No one, that's who! and tonight I get to fuck any girl I please! Come on bitches!"

"I have no regret that someone openly identified with terrorist organisations and activities meets his death the same way."

"Our message to the perverts who voted for them [Sinn Féin] is that they will not get anything through this council."

"The GAA is the sporting wing of the IRA."

"Irish is a leprechaun language."

"Leadbelly."

"Would this council be prepared to congratulate all those who have done a good job on two sides of the border?"

"I once drank fenian blood at a black mass. I liked it."