If you know one thing about quantum mechanics, it’s that Schrodinger’s cat is both dead and alive. This is what physicists call a “superposition”. But what does this really mean? And what does it have to do with entanglement? This video explains it.
What is the universe really made of? What is truly fundamental in the reality that we perceive? This video is about QFT: Quantum field theory – simplified.
Everything that you see is thought to be made of up of particles. This is what most people are taught in science class. The only problem is it is not true. And physicists have known this for decades. Particles are really not fundamental. The best theory in physics tells us that there really are no particles at all, only fields. Particles are merely waves in the field. Fields are fluid-like substances that can be perturbed, vibrate, and experience excitations. What exactly are fields?Continue reading “What is the universe really made of? Quantum Field Theory visualized”
It seems like quantum computers will likely be a big part of our computing future—but getting them to do anything super useful has been famously difficult. Lots of new technologies are aiming to get commercially viable quantum computing here just a little bit faster, including one innovation that shrinks quantum technology down onto a chip. Enter: the cryogenic chip. But first, a quick refresher on how quantum computing works. Unlike a classical bit, a quantum computer uses quantum bits, or qubits, to make calculations. These qubits have the potential to be super powerful, providing quantum computers with the potential to run really complex calculations exponentially faster than classical computers. But qubits are also really, really hard to both make and control. Today, quantum computers have less than 100 qubits, but in order to tackle problems we want answers to, we will need to scale up to million-qubit systems. That means that we will need a more sustainable way to control the behavior of qubits. One solution? A cryogenic computer chip. Intel just debuted a chip its calling Horse Ridge, a technology that takes the electronics needed to control the qubits, and puts them on a chip that’s capable of functioning at about 4 Kelvin, so they can live inside the cryogenic chamber with the qubits. But how does this cryogenic chip work, how realistic of a solution is it really, and what could it mean for the future of quantum computing?
We have looked at how a transistor works, the fundamental unit of classical computers, and how a quantum computer works in theory, taking advantage of quantum superposition to hold exponentially more information than classical computers. Now we look at the practical side of making a quantum bit, or qubit. How do you put it in a state where it is stable? How do you read and write information on it? These processes are described for a solid-state qubit – a phosphorous atom in a silicon crystal substrate. Both the electron and the nucleus of the phosphorous atom can be used as qubits.
Our universe is an amalgamation of different objects following a wide spectrum of sizes, ranging from the smallest particles to the jumbo astronomical objects. being able to perceive the nature and behavior of all these sizes has been one ultimate goal of mankind since ages. But, as a single medicine cannot cure all the diseases, Similarly, a single scientific theory cannot work well at all the scales. So where we can efficiently describe the motion of a billiard ball or the motion of the planets around the Sun, using the same laws we cannot describe the behavior of smallest entities in the nature. This is where quantum physics comes into picture. But what it really is? What led to the development of this theory and how is it different from classical physics? This is Q and A and here is the answer to the ques What is Quantum Physics?Continue reading “What Is Quantum Physics, Exactly?”
In the late 1970s, two physicists in Switzerland set out to invent a new type of microscope using quantum physics that would allow them to do something no one had ever done before: see the individual atoms in a sheet of metal.
Scientists have proposed to build a functional wormhole tunnel by simulating quantum entangled black holes in a lab. Quanta Magazine reports the linked black holes are theoretically able to teleport quantum information via the tunnel.
Black holes were thought to totally obliterate the objects they consume. However, the experiment will test a new idea in physics that evaporating black holes actually send information about subsumed objects back to the universe via Hawking radiation.
Citing California Institute of Technology physicist Sepehr Nezami, the outlet reports the research team believes a black hole could be forced to disgorge intact information after it is entangled with another black hole on a quantum level.
Stanford University’s Adam Brown is cited as saying quantum circuitry could make a functional analog for entangled black holes. If the theory is correct, this circuitry would be able to instantly transmit and decrypt qubits, also known as quantum teleportation.
Quantum theory may be weird—superposition and entanglement of particles that in our normal world would make no sense—but quantum theory is truly how the microworld works. What does all this weirdness mean? How to go from microworld weirdness to macroworld normalcy? Will we ever make sense out of quantum mechanics?
Quantum computing could change the world. It could transform medicine, break encryption and revolutionize communications and artificial intelligence. Companies like IBM, Microsoft and Google are racing to build reliable quantum computers. China has invested billions. Recently, Google claimed that it had achieved quantum supremacy – the first time a quantum computer has outperformed a traditional one. But what is quantum computing and how do quantum computers work?