Why You Should Care About Quantum Theory / Mechanics
It hints of an incredibly exciting future!
by Eric Haseltine Ph.D.
In case you haven’t heard, Quantum science is white hot right now, with excited talk of unimaginably powerful quantum computers, ultra-efficient quantum communication and impenetrable cyber security through quantum encryption.
Why all the hype?
Simply put, Quantum science promises giant leaps forward instead of the baby steps we have grown accustomed to through everyday science. Everyday science, for example, gives us new computers that double in power every 2-3 years, whereas Quantum science promises computers with many trillions of times more power than the most muscular computer available today.
In other words Quantum science, if successful, will produce a seismic shift in technology that will reshape the world as we know it, in even more profound ways than the Internet or smartphones did.
The breathtaking possibilities of Quantum science all arise from one simple truth: quantum phenomena completely break the rules that limit what “classical” (normal) phenomena can accomplish.
Two examples where Quantum science makes what used to be impossible suddenly possible, are quantum superposition and quantum entanglement.
Let's tackle quantum superposition first.
In the normal world, an object such as a baseball can only be in one place at one time. But in the quantum world, a particle such as an electron can occupy an infinite number of places at the same time, existing in what physicists call a superposition of multiple states. So in the quantum world, one thing sometimes behaves like many different things.
Now let's examine quantum entanglement by extending the baseball analogy a little further. In the normal world two baseballs sitting in dark lockers in major league stadiums in Los Angeles and Boston are totally independent of each other, such that if you opened one of the storage lockers to look at one baseball, absolutely nothing would happen to the other baseball in a dark storage locker 3,000 miles away. But in the quantum world, two individual particles, such as photons can be entangled, such that the mere act of sensing one photon with a detector instantaneously forces the other photon, no matter how far away, to assume a particular state.
Such entanglement means that in the quantum universe, multiple distinct entities can sometimes behave as a single entity, no matter how far apart the distinct entities are.
This would be the equivalent of changing the state of one baseball—say, forcing it to be on the top vs. bottom shelf of a storage locker—simply by opening a storage locker 3,000 miles away and gazing at an entirely different baseball.
These “impossible” behaviors make quantum entities ideal for doing the impossible with, for example, computers. In normal computers a stored bit of information is either a zero or a one, but in a quantum computer a stored bit, called a Qubit (quantum bit), is both zero and one at the same time. Thus, where a simple memory store of 8 bits can contain any individual number from 0 to 255 (2^8=256) a memory of 8 Qubits can store 2^8= 256 separate numbers all at once! The ability to store exponentially more information is why quantum computers promise a quantum leap in processing power (Already being undertaken).
Which brings us to the intersection of Quantum science and neurobiology. The human brain is a far more powerful processor than any computer available today: does it achieve some of this awesome power by harnessing quantum weirdness in the same way that quantum computers do?
Up until very recently, physicists’ answer to that question has been a resounding “No.”
Quantum phenomena such as superposition rely on isolating those phenomena from the surrounding environment, particularly heat in the environment that sets particles in motion, upsetting the hyper-delicate quantum house of cards of superposition and forcing a particular particle to occupy either point A or point B, but never both at the same time.
Thus, when scientists study quantum phenomena they go to great lengths to isolate the material they’re studying from the surrounding environment, usually by lowering the temperature in their experiments to nearly absolute zero. (-459.67 f)
But evidence is mounting from the world of plant physiology that some biological processes that rely on quantum superposition occur at normal temperatures, raising the possibility that unimaginably strange world of quantum mechanics may indeed intrude into the every day workings of other biological systems, such as our nervous systems.
Evolution, in its relentless quest to engineer the most energy-efficient life forms, appears to have ignored physicists’ belief that useful quantum effects can’t happen in the warm, wet environments of biology.
The discovery of quantum effects in plant biology has given rise to an entirely new field of science called quantum biology. In the past few years, quantum biologists have unearthed evidence of quantum mechanical properties in magnetic field perception in the eyes of some birds (enabling the birds to navigate during migration).
Did evolution also make our brains hyper-efficient at generating useable energy or transmitting and storing information among neurons using quantum effects such as superposition and entanglement?
Neuroscientists are at the very beginning of investigating this possibility, but I for one am excited about the nascent field of quantum neuroscience because it could lead to jaw-dropping breakthroughs in our understanding of the brain.
I say this because the history of science teaches us that the biggest breakthroughs almost always come from ideas that, before a particular breakthrough occurs, sound incredibly weird. Einstein’s discovery that space and time are really the same thing (general relativity) is one example, Darwin’s discovery that humans evolved from more primitive life forms, is another. And of course, Planck, Einstein and Bohr’s discovery of quantum mechanics in the first place, is yet another.
The Sarasota Patriots tries to keep up with the latest on cutting edge science especially Quantum Mechanics, String Theory and the biological science of Gene & DNA manipulation using the incredible new tool CRISPR. Its all geared for the novice, so head over to their science section for the latest, videos too.