My quantum experiment, which has consumed me for greater than a 12 months now, has dredged up a creepy, long-buried reminiscence. It dates again to the late Nineteen Seventies, after I was a housepainter residing in Denver. One day I discovered myself in a grungy saloon on Denver’s dusty japanese outskirts. Behind the bar was an aquarium with a single, nasty-looking fish hovering in it. A silver, saucer-sized, snaggle-toothed, milky-eyed, blind piranha.
Now after which, the bartender netted just a few minnows from a fishbowl and dropped them into the piranha’s cubicle. The piranha froze for an instantaneous, then darted this manner and that, jaws snapping, because the minnows fled. The piranha saved bumping, with audible thuds, into the glass partitions of its jail. That defined the protuberance on its snout, which resembled a tiny battering ram. Sooner or later the piranha devoured all of the hapless minnows, whereupon it returned to its listless, suspended state.
What does this poor creature need to do with quantum mechanics? Here’s what. Our trendy scientific worldview and far of our know-how—together with the laptop computer on which I’m writing these phrases—relies on quantum rules. And but a century after its invention, physicists and philosophers can not agree on what quantum mechanics means. The idea raises deep and, I’m guessing, unanswerable questions on matter, mind and “reality,” whatever that is.
More than a half century in the past, Richard Feynman suggested us to just accept that nature is mindless. “Do not keep saying to yourself … ‘But how can [nature] be like that?’” Feynman warns in The Character of Physical Law, “because you will get ‘down the drain,’ into a blind alley from which nobody has yet escaped. Nobody knows how it can be like that.” Most physicists have adopted Feynman’s recommendation. Ignoring the oddness of quantum mechanics, they merely apply it to perform numerous duties, resembling predicting new particles or building more powerful computers.
Another deep-thinking physicist, John Bell, deplored this example. In his traditional 1987 work Speakable and Unspeakable in Quantum Mechanics, Bell chides physicists who apply quantum mechanics whereas blithely disregarding its “fundamental obscurity”; he calls them “sleepwalkers.” But Bell acknowledges that efforts to “interpret” quantum mechanics in order that it is smart have failed. He likens interpretations such because the many-world hypothesis and pilot-wave theory to “literary fiction.”
Today, there are extra interpretations than ever, however they deepen fairly than dispel the thriller on the coronary heart of issues. The extra I dwell on puzzles resembling superposition, entanglement and the measurement downside, the extra I determine with the piranha. I’m blindly thrashing about for insights, epiphanies, revelations. Every at times I feel I’ve grasped some slippery truth, however my satisfaction is at all times fleeting. Sooner or later, I find yourself crashing into an invisible barrier. I don’t really know where I am or what’s happening. I’m in the dark.
The primary distinction between me and piranha is that it’s contained in the aquarium, and I’m on the surface, wanting in. I can take solace from the truth that my world is far larger than the piranha’s, and that I do know many issues that the fish can not. But it’s all too straightforward to think about some enlightened, superintelligent being standing outdoors our world, taking a look at us with the identical pity and smug superiority that we really feel towards the piranha.
Plato presents himself as this enlightened being in his well-known parable of the cave, which I make my freshman humanities lessons learn each semester. The parable describes individuals confined to a cave for his or her total lives. They are prisoners, however they don’t know they’re prisoners. An evil trickster behind them has constructed a hearth, by the use of which he tasks shadows of every thing from aardvarks to zebras onto the cave wall in entrance of the prisoners. The cave dwellers mistake these shadows for actuality. Only by escaping the cave can the prisoners uncover the good, sunlit actuality past it.
We are the benighted prisoners within the cave, and Plato, the enlightened thinker, is attempting to tug us into the sunshine. But isn’t it doable, even possible, that Plato and different self-appointed saviors, who say they’ve seen the sunshine and wish us to see it too, are charlatans? Or loons? Given our profound capacity for self-deception, isn’t it possible that while you suppose you’ve left the cave, you’ve truly simply swapped one set of illusions for one more? These are the questions with which I torment my college students. Here are a few of their responses:
- Clearly, some individuals are ignorant and deluded, like flat-earthers, and others are well-informed. So sure, we will and do escape the cave of ignorance by going to varsity and finding out physics, chemistry, historical past, philosophy and so forth. We can scale back our ignorance nonetheless additional with the assistance of dependable information sources, such because the New York Times and Fox News, and touring to different nations to find out how different individuals see the world.
- Yes, we will escape the cave by finding out physics and different fields, however we solely find yourself in one other cave, with equations projected on the partitions as an alternative of silhouettes of aardvarks and so forth. The new cave could also be extra attention-grabbing, snug and better-illuminated than the cave we have been in earlier than, nevertheless it’s nonetheless a cave. Only just a few uncommon souls expertise final actuality, like Buddha, Jesus and Einstein.
- Plato wasn’t actually speaking about worldly data, he was speaking about spiritual knowledge, or enlightenment. So sure, we will depart the cave and see the sunshine of reality, however solely by accepting the teachings of nice sages resembling Buddha, Moses, Jesus or Muhammad, and maybe by working towards religious disciplines resembling prayer and meditation.
- With the assistance of philosophy, artwork, meditation and psychedelics, we will develop into extra conscious that we’re in a cave, in a state of phantasm; we will know, kind of, what we don’t know. But no mere human ever escapes the cave, not even the best sages and scientists. Not even Plato, Stephen Hawking or L. Ron Hubbard. Only God, if there’s a God, can understand absolute reality. And maybe not even God.
- Who cares if we’re in a cave or not? If we’re having enjoyable, that’s all that issues. (Although only some of my college students have the braveness to voice this selection, I believe it’s what a lot of them suppose, particularly the enterprise majors.)
To be sincere, the fourth possibility—that not even God can escape the cave, plus the references to psychedelics, Stephen Hawking and L. Ron Hubbard—is mine. But my college students provide you with the opposite choices on their very own, with minimal prodding from me. By the time we’re carried out with this train, I begin feeling responsible about rubbing the younger, harmless faces of the non–enterprise majors on this planet’s inscrutability. To make them really feel a bit of higher, I deliver up one other chance that often doesn’t happen to them:
If we understand we’re within the cave, isn’t that the identical, kind of, as escaping from it? Actually, if “ultimate reality” is inaccessible to us, isn’t that the identical, kind of, as saying that it doesn’t exist? And therefore that the cave, the world through which we reside each day, is the one and solely actuality? And therefore that the enterprise majors are proper, and we should always just chill out and enjoy ourselves?
Maybe. On good days, I look out the window of my residence on the shining Hudson River, crisscrossed by boats, and on the Manhattan skyline, a logo of humanity’s ever-growing knowledge of and power over nature, and I feel, Yes, this is actuality, there may be nothing else. But then I keep in mind the quantum mist on the core of actuality, which not even the neatest sages can penetrate, and to which most of us are oblivious. And I keep in mind the piranha, bumping time and again into the partitions of its world, blind to its personal blindness.
This is an opinion and evaluation article; the views expressed by the creator or authors should not essentially these of Scientific American.
Further Reading:
Is the Schrödinger Equation True?
Quantum Mechanics, the Chinese Room Experiment and the Limits of Understanding
Quantum Mechanics, the Mind-Body Problem and Negative Theology
I discover the bounds of information in my two most up-to-date books, Mind-Body Problems, out there without spending a dime on-line, and Pay Attention: Sex, Death, and Science.
See my latest chat with Russian writer/artist Nikita Petrov, through which we discuss in regards to the blind piranha, Plato’s cave and psychedelics.
Discussion about this post