Researchers at the California Institute of Technology have developed a quantum eraser to correct the problems in quantum computing systems"Erase"Mistake. This technology involves light in a laser"Tweezers"Neutral atoms in alkaline earth can be detected and errors can be corrected by fluorescence. This innovation increases the entanglement rate of the Redberg neutral atomic system tenfold, taking a key step in improving the reliability and scalability of quantum computers.
Future quantum computers are expected to revolutionize problem-solving in various fields, such as creating sustainable materials, developing new drugs, and revealing complex problems in fundamental physics. However, these groundbreaking quantum systems are currently more error-prone than the classical computers we use today. Wouldn't it be nice if researchers could come up with a special quantum eraser and erase mistakes?
For the first time, the researchers successfully demonstrated"Erase"Identification and removal of errors.
According to the journal Nature, a team of researchers led by the California Institute of Technology was the first to demonstrate a quantum eraser. Physicists have demonstrated that they can pinpoint and correct what quantum computing systems are called"Erase"Wrong bug.
Adam Shaw, co-first author of the new study and a graduate student in the lab of Manuel Endres at Caltech, a professor of physics at Caltech, said:"It is often difficult to detect errors in quantum computers, because the mere act of looking for errors can lead to more errors. But our research shows that with some meticulous control, we can pinpoint and eliminate certain errors without consequences, which is where the name erasure comes from. "
Quantum computers are based on the laws of physics in the subatomic realm, such as entanglement, a phenomenon in which particles remain connected to each other and mimic without direct contact. In the new study, the researchers focused on a quantum computing platform that uses arrays of neutral atoms or uncharged atoms. Specifically, they manipulated the closure made in a laser"Tweezers"Neutral atoms within a single alkaline earth. These atoms are excited to a high-energy state, ie"Redberg"state, in which neighboring atoms begin to interact with each other.
While errors in quantum devices are often difficult to detect, researchers have shown that with careful control, some errors can make atoms glow. Using this capability, the researchers performed a quantum simulation using an array of atoms and a laser beam, as shown in the figure. Experiments have shown that they can get rid of the wrong atoms that emit light, making quantum simulations run more efficiently. **California Institute of Technology Lance-Lynda.
Pascal Scholl, another co-first author of the study, explains:"The atoms in our quantum system talk to each other and become entangled"He was a postdoctoral scholar at the California Institute of Technology and now works for a quantum computing company called Pasqal in France.
Entanglement is the key to quantum computers surpassing classical computers. "However, nature does not like to maintain this state of quantum entanglement"Scholl explains. "Eventually, an error occurs, destroying the entire quantum state. These entangled states can be seen as a basket full of apples, and the atom is the apple. Over time, some apples will start rotting, and if these apples are not taken out of the basket and replaced with fresh ones, then all the apples will rot quickly. It is not clear how these errors can be prevented completely, so the only possible way to do so is to detect and correct them"。
The new error capture system is designed in such a way that the wrong atom fluoresces or emits light when irradiated by a laser. scholl said"We have images of luminescent atoms that tell us that the error is in, so we can exclude them from the final count, or use additional laser pulses to proactively correct them. "
The theory of implementing erase detection in neutral atomic systems was first proposed by Jeff Thompson, a professor of electrical and computer engineering at Princeton University, and his colleagues. The team also recently reported on a demonstration of the technology in the journal Nature.
The Caltech team says they can increase the overall rate or fidelity of entanglement by eliminating and locating errors in their Redberg atomic system. In the new study, the team found that only one out of 1,000 pairs of atoms failed to entangle. This is a 10-fold improvement over previous results and is the highest rate of entanglement observed in this type of system.
At the end of the day, these results bode well for quantum computing platforms using Redberg's array of neutral atoms. Neutral atoms are the most scalable type of quantum computer, but until now they have had high entangled fidelity.
Reference: Erase Conversion in a High-Fidelity Redberg Quantum Simulator by Pascal Scholll, Adam LShaw, Richard Bing-Shiun Tsai, Ran Finkelstein, Joonhee Choi, and Manuel Endres, October 11, 2023, Nature.
doi: 10.1038/s41586-023-06516-4
Compilation**: scitechdaily