Quantum entanglement is a complex phenomenon in physics, usually rarely explained as an invisible link between quantum objects that are far apart. This allows one to have an immediate effect on the other. Albert Einstein famously dismissed this idea of entanglement as “a far-fetched and spooky act.” In practice, entanglement is better understood as information, but it’s certainly bland. Therefore, today all news articles, explainers, opinion pieces, and artistic interpretations of quantum entanglement equate this phenomenon with Einstein’s uncanny. Things got even worse, and the 2022 Nobel Prize in Physics went to Alan Aspect, John F. Krauser, and Anton Zeilinger for their quantum entanglement experiments. But it’s time to let go of this adjective. Calling Tangle creepy completely misrepresents how it really works and hinders our ability to make sense of it.
In 1935, physicist Erwin Schrödinger coined the term entanglement., emphasize that it wasn’t one Rather of It is a feature of quantum mechanics and forces a complete departure from classical thinking. He was writing in response to the famous paper (known to physicists simply as his EPR argument) by Einstein, Boris Podolski, and Nathan Rosen who argued that quantum physics was incomplete. rice field.of new york times The headline read, “Einstein Attacks Quantum Theory,” cementing the widespread perception that Einstein hated quantum physics.
The EPR discussion concerns the everyday conception of reality as a collection of objects in the world whose physical properties are waiting to be revealed by measurement. This is how most of us intuitively understand reality.Einstein’s theory of relativity fits this understanding, and reality is local, That is, you cannot affect other things at speeds faster than the speed of light. But EPR has shown that quantum physics is incompatible with these ideas. That is the inability to explain the theory of local reality. So there was something missing in quantum physics. Einstein suggested that in order to perfect quantum physics, scientists should look for “deeper” theories of local reality. Although many physicists have argued in defense of quantum theory, the issue remained open until his 1964 physicist John S. Bell proposed an experiment that could rule out the existence of local reality. Krauser was the first to run the test, later refined and completed by Aspect and Seilinger.
A typical article on entanglement states that entanglement occurs when particles interact to create a “link” that persists no matter how far apart those particles are. Furthermore, the action performed on a single particle is Immediately Influence or be said to influence others. But what even many experts misunderstand is quantum physics. won’t Say.Quantum physics says nothing about how the world works teeth. Instead, quantum physics only describes the experiments we do to test theories about how the world works, and we give the probabilities of the possible outcomes of the experiments. The urge to interpret the concept of quantum physics as a prescription for physical reality stems from the unfortunate way we have traditionally taught physics.
I teach Quantum Physics to Second Year Computer Science students at the University of Technology, Sydney. Every fall, I give her teens practical knowledge by guiding them through the process of manipulating quantum phenomena themselves without calling quantum entanglement creepy. A former student said he understood the 2022 Nobel Prize in Physics report. This is because I have students program quantum computers to generate entanglement. Another former student told me he had trouble understanding where there should be some mysterious eerieness.
Physics teachers typically begin a lecture on Einstein’s entanglement, introduce concepts such as local realism, and necessarily end by evoking the experimenter’s free will. But it doesn’t have to be this way. From the point of view of information rather than physics, it is much easier to understand how quantum physics works and how it deviates from the classical world.
Imagine two people, Alice and Bob, are involved in a crime and are being interrogated in separate rooms with no communication. They are each asked one of two possible questions. They must corroborate each other’s stories in order to be released. But there’s a catch: the question contains a trap, and if both are asked her second question, both must answer. oppose to answer. Alice and Bob know all this before heading to the room for questioning. So they do their due and devise a strategy so that the responses are related in an appropriate way. However, it soon becomes apparent that there is no strategy that can free them, since they do not know which questions the other investigators have asked. is. This is done by accepting to fail in one of four cases and giving the same answer to all questions in both.
So far, Alice and Bob have only used classical information. But by sharing quantum information, you have a 75%+ chance of success. They do this by devising strategies using the mathematics of quantum information rather than classical information. Intuitive understanding of the solution requires some familiarity with linear algebra, so I won’t go into detail here. However, it is true that the quantum information they share requires correlation and is intertwined. This looks creepy to investigators because they reason with only classical information. But it’s not creepy. Correlations are everywhere in any information theory. Seen through the lens of quantum information, entanglement is neither strange nor unusual, but expected. The information perspective brilliantly illustrates the core problem that demands a classical description of quantum phenomena. It’s the wrong language. The Nobel laureate was the first to point this out as a fact about nature. Today, we can follow in their footsteps by creating entanglements and processing correlated quantum information with real quantum computers.
Einstein wanted to identify the whole of nature with a simple, compact classical description.But we now know that quantum Information provides the most accurate descriptions of nature written in languages we don’t speak. By embracing this, we free ourselves from the limitations of traditional physics and can teach physics more naturally by fostering active learning. The perspective of quantum information reveals some of the most profound questions in physics. Quantum information, for example, is key to understanding the mysteries of black holes and possibly the universe as a whole. It also leads to new quantum techniques that rapidly and automatically encode and process quantum information.
In the second half of the 20th century, computers rapidly changed every aspect of society, changing our understanding of the universe and ourselves. I thought it was the ultimate tool for this purpose, but I was wrong.Scientists now believe the ultimate machine is quantum A computer with possibilities that we haven’t realized yet. Determining what problems quantum computers will solve when they become ubiquitous is an exercise in observing crystals. However, we already know that it can solve some problems, such as factoring, searching databases, and simulating chemical reactions. If you have a problem like this, you may be in the market for quantum computers. I think you’ll love it; Einstein, on the other hand, would have hated it.
