Scientists have made a groundbreaking discovery that sheds light on the origins of quantum entanglement. Using powerful computer simulations, researchers from TU Wien in Vienna and China have unlocked the secrets of the attosecond realm, where quantum entanglement is born. An attosecond is a billionth of a billionth of a second.
This is the timescale where quantum entanglement emerges. The researchers recreated the interactions between atoms and intense laser pulses to study this phenomenon. They focused on atoms hit by an intense laser pulse.
The interactions led to quantum entanglement between two electrons within the atom. “We can show that these two electrons are now quantum entangled,” said Prof. Joachim Burgdörfer from TU Wien.
“You can only analyze them together – and you can perform a measurement on one of the electrons and learn something about the other electron at the same time.”
The researchers have been able to correlate the “birth time” of an electron escaping an atom with the energy state of a second electron remaining within the atom. Surprisingly, this “birth time” isn’t a fixed moment. Instead, it’s a quantum superposition, meaning the electron essentially exists in multiple moments at once.
“This means that the birth time of the electron that flies away is not known, in principle. You could say that the electron itself doesn’t know when it left the atom,” highlighted Prof.
Quantum entanglement’s attosecond insights
Burgdörfer. “It is in a quantum-physical superposition of different states. It has left the atom at both an earlier and a later point in time.”
The energy of the electron remaining in the atom is also uncertain.
If the remaining electron has higher energy, the escaping electron probably left earlier. If the remaining electron has lower energy, the escaping electron probably left a bit later, on average, 232 attoseconds later. “These differences can not only be calculated but also measured in experiments,” said Prof.
Burgdörfer. The team at TU Wien is now working with experimental physicists to confirm these simulations in a real-world lab setting. This deeper understanding of entanglement could revolutionize fields like quantum computing and quantum cryptography.
It’s clear that in the quantum world, even the briefest moments hold a wealth of information. As Prof. Iva Březinová explains, “The electron doesn’t just jump out of the atom.
It is a wave that spills out of the atom, so to speak — and that takes a certain amount of time. It is precisely during this phase that the entanglement occurs, the effect of which can then be precisely measured later by observing the two electrons.”
Johannah Lopez is a versatile professional who seamlessly navigates two worlds. By day, she excels as a SaaS freelance writer, crafting informative and persuasive content for tech companies. By night, she showcases her vibrant personality and customer service skills as a part-time bartender. Johannah's ability to blend her writing expertise with her social finesse makes her a well-rounded and engaging storyteller in any setting.
