UNSW unveils complete design of a silicon quantum computer chip

ZDNet

A team of engineers from the University of New South Wales (UNSW) has unveiled the design of a working chip that can integrate quantum interactions. According to UNSW, the design, which can be manufactured using mostly standard industry processes and components, comprises a "novel architecture" that allows quantum calculations to be performed using existing semiconductor components, known as CMOS -- complementary metal-oxide-semiconductor. CMOS is the basis for all modern chips. "We often think of landing on the Moon as humanity's greatest technological marvel, but creating a microprocessor chip with a billion operating devices integrated together to work like a symphony -- that you can carry in your pocket -- is an astounding technical achievement, and one that's revolutionised modern life," Andrew Dzurak, director of the Australian National Fabrication Facility at UNSW, said. "With quantum computing, we are on the verge of another technological leap that could be as deep and transformative. But a complete engineering design to realise this on a single chip has been elusive.


UNSW has found a way to access information stored within atoms

ZDNet

The University of New South Wales (UNSW) has announced the demonstration of a compact sensor for accessing information stored in the electrons of individual atoms, touted as a breakthrough that brings a scalable quantum computer in silicon one step closer. UNSW is banking on silicon being the key to building the first quantum computer and the results of the research, conducted within the Professor Michelle Simmons-led Simmons group at the Centre of Excellence for Quantum Computation and Communication Technology (CQC2T), show how this may be achieved. Quantum bits (qubits) made from electrons hosted on single atoms in semiconductors is a promising platform for large-scale quantum computers, the university believes, and creating qubits by precisely positioning and encapsulating individual phosphorus atoms within a silicon chip is the approach Simmons' teams are taking. Read also: Australia's ambitious plan to win the quantum race However, adding in all the connections and gates required for scale up of the phosphorus atom architecture was the challenge the researchers were faced with. "To monitor even one qubit, you have to build multiple connections and gates around individual atoms, where there is not a lot of room," Simmons said.


Australian experts find new way to build quantum computer

Daily Mail - Science & tech

Researchers in Australia have found a new way to build quantum computers using a'flip flop' chip design. Quantum computers promise to harness the strange ability of subatomic particles to exist in more than one state at a time. This could allow them to solve problems that are too complex or time-consuming for existing computers. It could also pave the way for machines that are completely impenetrable to hackers using conventional methods of attack. Researchers in Australia have found a new way to build quantum computers which they say would make them dramatically easier and cheaper to produce at scale.


Quantum Computing Update: 'Quantum Memory' Created Using Phosphorous-Doped Silicon Nanostructure

International Business Times

In the quantum realm, at least insofar as we can understand, particles are in a state of superposition, wherein they exist in two or more states simultaneously -- a cat that is both dead and alive, so to speak. However, this "coherence" lasts for only a fraction of a second before the whole system decoheres -- a phenomenon that marks the transition from the realm of quantum to classical mechanics. The fact that a coherent quantum state is short-lived is what allows reality as we know it to exist, but, for researchers looking to exploit superposition to create quantum computers, this presents a major roadblock. For these researchers, looking for ways to least delay decoherence -- thereby preserving the state of superposition that makes quantum computers so much faster than their conventional counterparts -- is a key goal. Read: Schrödinger's Cat Is Now Dead And Alive In Two Boxes Now, in a study published in the latest edition of the journal Quantum Science and Technology, a team of researchers has demonstrated the storage and retrieval of quantum information in a single atom of phosphorus embedded in a silicon crystal.


Shoot an atom into silicon, and you may have the beginnings of a quantum computer

PCWorld

Take one atom of the element antimony, use an ion beam to shoot it into a silicon substrate, and you just may be on your way to building a working quantum computer. That's according to researchers at Sandia National Laboratories, who announced this week that they've used that technique with promising results. In their experiment, described in the journal Applied Physics Letters, the researchers used an ion beam generator to insert the antimony atom into an industry-standard silicon substrate -- a process that took just microseconds. That atom, equipped with five electrons, carries one more than a silicon atom does. Because electrons pair up, the odd antimony electron remains free.