Archive for the ‘computing’ category: Page 490
Jan 8, 2019
IBM unveils first standalone quantum computer
Posted by Genevieve Klien in categories: computing, quantum physics
Jan 8, 2019
Intel Lakefield Brings Its 3D Chip-Stacking Tech to Life
Posted by Klaus Baldauf in category: computing
Weeks after introducing Foveros, its 3D logic stacking technology, Intel has shown off a motherboard that puts it to use.
Jan 7, 2019
Quantum scientists demonstrate world-first 3D atomic-scale quantum chip architecture
Posted by James Christian Smith in categories: computing, nanotechnology, quantum physics
University of New South Wales researchers at the Centre of Excellence for Quantum Computation and Communication Technology (CQC2T) have shown for the first time that they can build atomic precision qubits in a 3D device — another major step towards a universal quantum computer.
The team of researchers, led by 2018 Australian of the Year and Director of CQC2T Professor Michelle Simmons, have demonstrated that they can extend their atomic qubit fabrication technique to multiple layers of a silicon crystal — achieving a critical component of the 3D chip architecture that they introduced to the world in 2015. This new research was published today in Nature Nanotechnology (“Spin read-out in atomic qubits in an all-epitaxial three-dimensional transistor”).
Jan 7, 2019
UNSW claims demonstration of 3D atomic-scale quantum chip architecture
Posted by Genevieve Klien in categories: computing, quantum physics
The 3D architecture is touted as a major step in the development of a blueprint to build a large-scale quantum computer.
Jan 7, 2019
A fast quantum interface between different spin qubit encodings
Posted by James Christian Smith in categories: computing, mathematics, quantum physics
“Open Article” smile Spin-based quantum computers have the potential to tackle difficult mathematical problems that cannot be solved using ordinary computers, but many problems remain in making these machines scalable. Now, an international group of researchers led by the RIKEN Center for Emergent Matter Science have crafted a new architecture for quantum computing. By constructing a hybrid device made from two different types of qubit—the fundamental computing element of quantum computers –they have created a device that can be quickly initialized and read out, and that simultaneously maintains high control fidelity.
Single-spin qubits in semiconductor quantum dots hold promise for universal quantum computation with demonstrations of a high single-qubit gate fidelity above 99.9% and two-qubit gates in conjunction with a long coherence time. However, initialization and readout of a qubit is orders of magnitude slower than control, which is detrimental for implementing measurement-based protocols such as error-correcting codes. In contrast, a singlet-triplet qubit, encoded in a two-spin subspace, has the virtue of fast readout with high fidelity. Here, we present a hybrid system which benefits from the different advantages of these two distinct spin-qubit implementations. A quantum interface between the two codes is realized by electrically tunable inter-qubit exchange coupling. We demonstrate a controlled-phase gate that acts within 5.5 ns, much faster than the measured dephasing time of 211 ns. The presented hybrid architecture will be useful to settle remaining key problems with building scalable spin-based quantum computers.
Jan 7, 2019
Qubits Communications
Posted by James Christian Smith in categories: computing, quantum physics
Qubits or quantum bits are the fundamental building block for quantum information processes. Whereas conventional computers store and process data as a series of ‘1’s and ‘0’s, quantum computers use the properties of a quantum system, such as the polarization of a photon or the spin of an electron.
Read the latest Research articles in Qubits from Nature Communications.
Jan 6, 2019
IBM Aims to Build the First Commercial Quantum Computer in ‘the Next Few Years’
Posted by Genevieve Klien in categories: computing, quantum physics
Jan 6, 2019
A Physics Breakthrough Could Lead to a New Generation of Advanced Electronics
Posted by Genevieve Klien in categories: computing, particle physics
Get ready to get excited about excitons.
Excitons are quirky quasiparticles that exist only in semiconducting and insulating materials. Recently, a team of researchers in Lausanne, Switzerland discovered a way to control how excitons flow. Not only that, they also discovered new properties of the particles which they claim could lead to a new generation of electronic devices with transistors that lose less energy as heat. The results of their study were published this week in the journal Nature Photonics.