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Scientists in China have created a practical quantum version of the simple AND operation, which may help quantum computing reach successful near-term applications. In the new study, qubits encode three states. This extra state temporarily holds the data needed to perform the AND operation.

The development of quantum technology is currently one of the most popular frontiers of advanced science, and is considered as a significant indicator of a country's sci-tech level. On a structural basis, a quantum computer consists of multiple quantum gates. Fault-tolerant quantum computation requires high-fidelity operation on the gates, stressing the priority of developing a reliable and efficient way to examine…

A new study from researchers at Japan's RIKEN Center for Quantum Computing and Toshiba reveals a high-fidelity quantum gate that promises to significantly...

Terry Rudolph, PsiQuantum & Imperial College London During a recent visit to the wild western town of Pasadena I got into a shootout at high-noon trying to explain the nuances of this question …

A precision diagnostic developed at the Department of Energy's Sandia National Laboratories is emerging as a gold standard for detecting and describing problems inside quantum computing hardware.

Researchers were able to execute the world's fastest two-qubit gate operation, bringing the future of quantum computing one step closer.

A precision diagnostic is emerging as a gold standard for detecting and describing problems inside quantum computing hardware.

MIT professor of physics Wolfgang Ketterle received a Vannevar Bush Faculty Fellowship to study quantum science and build new quantum devices using ultracold dysprosium atoms.

Researchers have succeeded in developing a technique to quickly search for the optimal quantum gate sequence for a quantum computer using a probabilistic method.

A potentially game-changing theoretical approach to quantum computing hardware avoids much of the problematic complexity found in current quantum computers. The strategy implements an algorithm in natural quantum interactions to process a variety of real-world problems faster than classical computers or conventional gate-based quantum computers can.

When combined with Qiskit software tools, the 156-qubit R2 Heron quantum processor can perform 5,000 two-qubit gate operations — double the previous best — meaning it's ready for complex quantum computations, IBM scientists say.

Using a superconducting qubit called fluxonium, MIT researchers in the departments of Physics and EECS, and in the Research Laboratory of Electronics, developed two new control techniques to achieve a world-record single-qubit fidelity of 99.998%.

Introduction Quantum researchers require access to different types of quantum hardware from digital, also known as gate-based, quantum processing units (QPUs) to analog devices that are capable of addressing specific problems that are hard to solve using classical computers. Today, Amazon Braket, the quantum computing service from AWS, continues to deliver on its commitment to […]

MIT physicists developed a technique to arrange atoms in much closer proximity than previously possible, down to 50 nanometers. The group plans to use the method to manipulate atoms into configurations that could generate the first purely magnetic quantum gate — a key building block for a new type of quantum computer.

The standard approach toward building quantum computers, called the gate model, involves arranging qubits in circuits and making them interact with each other in a fixed sequence. In contrast, Burnaby, Canada-based D-Wave has long focused on what are called annealing quantum computers.

A research partnership at the Advanced Quantum Testbed (AQT) at Lawrence Berkeley National Laboratory (Berkeley Lab) and Chicago-based Super.tech (acquired by ColdQuanta in May 2022) demonstrated how to optimize the execution of the ZZ SWAP network protocol, important to quantum computing. The team also introduced a new technique for quantum error mitigation that will improve the network protocol's implementation…

Researchers have achieved a key milestone toward the development of a fault-tolerant quantum computer. They were able to demonstrate a two-qubit gate fidelity of 99.5 percent -- higher than the 99 percent considered to be the threshold for building fault-tolerant computers -- using electron spin qubits in silicon, which are promising for large-scale quantum computers as the nanofabrication technology for building…

Merons are spin textures with a half-unit topological charge found in chiral magnetic materials. Here, the authors show that merons with nanometer-scale size are stable and can be used to perform quantum computing gate operations by applying a magnetic field or spin-polarized current.

Researchers from RIKEN and QuTech—a collaboration between TU Delft and the Netherlands Organisation for Applied Scientific Research (TNO)— have achieved a key milestone toward the development of a fault-tolerant quantum computer. They were able to demonstrate a two-qubit gate fidelity of 99.5 percent—higher than the 99 percent considered to be the threshold for building fault-tolerant computers—using electron spin…