MAROKO133 Eksklusif ai: Swiss scientists crack quantum noise problem with 99.9% accurate s

📌 MAROKO133 Update ai: Swiss scientists crack quantum noise problem with 99.9% acc

Scientists in Switzerland have come closer to building stable quantum computers after developing a swap gate made of neutral atoms that can deliver 99.9 percent accuracy while operating across 17,000 qubits.

Led by Tilman Esslinger, PhD, a professor at the Institute of Quantum Electronics at ETH Zurich, the research team turned to geometric phases, an approach that makes quantum logic operations more robust against experimental noise.

Using this method, the scientists realized a high-quality swap gate, or a quantum exchange. This is a fundamental quantum operation that exchanges the states of two qubits.

Swap gates typically rely on interactions like tunneling or collisions that are highly sensitive to imperfections. In contrast, this novel method depends on the path a quantum system takes rather than on unstable external factors.

The researchers also proved that the gate can be applied to several thousands of qubits at the same time.

A stable quantum step

Quantum computers rely on qubits, the fundamental, quantum-mechanical units of information. Unlike classical bits that are either 0 or 1, they can exist in multiple states at once. But controlling qubits precisely is notoriously difficult.

Even tiny fluctuations in temperature, laser intensity, or even environmental noise can disrupt them. To address the challenge, the team designed a swap gate based purely on geometric phases, that exchanges the quantum state of two qubits.

This means that if qubit A is in state 0 and qubit B is in state 1, after the execution of the swap gate, qubit A will be in state 1 and qubit B in state 0. These gates help route quantum information.

Hence, the outcome is set by the system’s path, not external fluctuations, which makes the gate more resistant to noise. To achieve this, the researchers trapped extremely cold potassium atoms in an optical lattice, a grid-like structure formed by laser light.

These atoms act as qubits, with their spin states encoding quantum information. By carefully manipulating the laser configuration, the team brought pairs of atoms close enough for their quantum wavefunctions to overlap in space. This way, they triggered the geometric phase that enables the swap operation.

Promising results

Because the potassium atoms are fermions and can not share the same quantum state, the manipulation produced a geometric phase.

“Unlike dynamical phases, this geometric phase is largely independent of the speed with which we manipulate the atoms, or how strongly the laser intensity fluctuates during the process,” Konrad Viebahn, PhD, the experiment’s junior group leader, noted.

As a result, the new swap gate achieved a precision of 99.91 percent. It was also able to operate simultaneously across 17,000 qubit pairs.

“We can now make lots of swap gates with neutral atoms,” Esslinger concluded in a press statement. “But of course we still need a few other ingredients to build a working quantum computer.” He added the next step involves pairing swap gates with a quantum gas microscope to visualize and selectively control qubit pairs.

Meanwhile, by introducing atomic collisions, the researchers achieved “half”-swap gates, that cause the qubits to become quantum mechanically entangled. This is a prerequisite for executing quantum algorithms.

The study has been published in the journal Nature.

🔗 Sumber: interestingengineering.com

📌 MAROKO133 Update ai: Student Dies When Hospital Has No ICU Doctors, Calls One on

The parents of a 26-year-old dental student named Conor Hylton are suing a Connecticut hospital after their son died in its “telehealth” intensive care unit where no critical care doctors were actually present, they allege in the lawsuit.

According to the wrongful death complaint filed against Yale New Haven Health, the largest healthcare provider in the state, Hylton visited the emergency room at its Bridgeport Hospital Milford Campus because of abdominal pain and vomiting on the morning of August 14, 2024. When his condition worsened, he was admitted to the hospital ICU and diagnosed with pancreatitis, dehydration, metabolic acidosis, and alcohol withdrawal, per a medical analysis cited in the suit.

Rather than receiving traditional care, however, Hylton was unwittingly plunged into a cold experiment in using remote work to offset hospital staffing shortages, which could be a grim portent in an age of AI automation. During the late hours he was admitted to the ICU, there were no on-hand ICU intensivists — the term for doctors that specialize in providing critical care — the suit alleges. Instead, the wing outsourced this to a “tele-ICU” service, which relies on off-site intensivists.

No on-site physician assessed Hylton for hours, despite his rapidly deteriorating condition. A hospitalist — a doctor that provides general medical care for in-patients but doesn’t specialize in critical care — was assigned to Hylton, but allegedly never saw him. 

In the early morning after he was admitted at around 4:30 AM, Hylton became unresponsive. He “slid down in bed, his eyes rolled back and he… exhibited seizure-like activity, vomited, became bradycardic and code was called,” the complaint alleges, as reported by Law & Crime. “He was intubated, but he could not be resuscitated, and he was pronounced dead.”

The pronouncement, according to the suit, was done by a “tele-health” provider on a video screen. 

The family, meanwhile, was never notified about Hylton’s condition, they claim. If they had the chance to have a say, they never would’ve allowed their son to go into a “tele-ICU.”

“It’s a fake ICU,” the family’s attorney Joel Faxon told CT Insider in a recent interview. “It’s not real because no patient would ever consent if they told… they’re not going to have a doctor in here. They’re going to be on the tube.”

In the lawsuit, the parents argue the ICU “violated hospital policy because no on-site doctor assessed Mr. Hylton from the time he was admitted to the ICU until after he exhibited seizure-like activity.” The ICU never provided bed-side monitoring, nor assessments for his pain levels and other basic medical measures that could’ve been taken by a doctor. It in particular points to an alleged failure to protect Hylton’s airways as he was being administered powerful sedatives, CT Insider noted, which may have contributed to his death. 

The lawsuit follows an investigation from the Connecticut Department of Public Health that concluded that the hospital failed to ensure quality medical care was provided” to Hylton, Law & Crime noted.

More on: America’s Largest Hospital System Ready to Start Replacing Radiologists With AI, Its CEO Says

The post Student Dies When Hospital Has No ICU Doctors, Calls One on Videochat Who Pronounces Him Dead Remotely, Lawsuit Claims appeared first on Futurism.

🔗 Sumber: futurism.com