In a landmark 1935 paper, Albert Einstein, Boris Podolsky, and Nathan Rosen published what became the first glimpse into one of the truly bizarre aspects of the quantum world: what physicists now call Quantum tangle, A phenomenon that seems to suggest that there are missing parts in our broader picture of reality.
The main problem addressed the observation that the quantum state of any one particle in a group that shares interactions with each other cannot be described independently regardless of the state of the other particles. Perhaps most intriguingly, the mysterious entangled nature of these interactions seemed to persist even when particles were separated at great distances, a phenomenon Einstein called “spooky action at a distance.”
“So one leads one to the conclusion,” Physicists wrote at that time“The description of reality as given by a wave function is not complete.”
Entanglement is an essential component of Quantum mechanics This is absent in classical mechanics. While it remains a mystery, studies involving it have occasionally led to unique insights into the nature of the quantum world.
This was recently the case for a team of researchers at Purdue University, who said they had succeeded in generating a new source of light generated by entangled images, which could help measure ultrafast events. The method devised by the researchers relied on generating entangled photons at wavelengths without a natural source, which fall within the extreme ultraviolet portions of the spectrum.
In their paper, recently published in physical review research, The team proposed generating pairs of entangled quantum photons in the extreme ultraviolet regime at attosecond measurements—that is, 1×10−18 of a second.
According to study co-author Dr. Niranjan Shivaram, associate professor of physics and astronomy at Purdue Institute for Quantum Science and Engineering, said that the entangled photons the team studied are “guaranteed to reach a specific location within a very short period of attoseconds, as long as they travel the same distance.”
According to Shivaram, the observed latency correlations with the new production of these light particles allow them to help measure ultrafast events.
“An important application in attosecond measurement,” Shivaram He said in a statementwhich allows researchers to “push the limits of measuring the shortest time-scale phenomena.”
Shivaram adds: “This source of entangled photons can also be used in quantitative imaging and spectroscopy, where entangled photons have been shown to enhance the ability to obtain information, but now in XUV and even X-ray wavelengths.”
The study authors note that understanding electrons and their role in the behavior of atoms is key in terms of understanding the timing of such events. Electrons move in time scales that occur in attoseconds, as with the photons in their study, and in femtoseconds (one quadrillionth of a second). To understand electrons, physicists are required to be able to measure their motion on such remarkably short timescales.
Ultimately, Purdue’s Shivaram research team has a wide range of applications, including developing methods for controlling electrons to engineer chemical reactions, along with producing unique new materials and even innovative new nanotechnologies.
“The possibilities for discovery are many,” Shivaram said, adding that such research could play a role in studying zeptosecond phenomena — events in a time scale of only one millisecond — which are currently impossible to explore due to the lack of lasers capable of producing pulses. In such small unfathomable intervals.
“Our unique approach of using entangled photons instead of photons in laser pulses could allow us to reach the zeptosecond system,” says Shivaram, noting that it will require developments, perhaps within the next half-decade, that could allow such measurements to finally become reality.
The team’s paper, “Atosecond entangled photons from the two-photon decay of unstable atoms: a source for attosecond experiments and beyond,” by Yimeng Wang, Sedant Pandey, Chris H. Green, and Niranjan Shivaram was published in Physical Review Research And the It can be read online.