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E-Mail IMAGE: The postage-stamp sized chip at the heart of an iPhone 5 has around one billion transistors. view more Credit: Errol Hunt (FLEET) New FLEET research confirms the potential for topological materials to substantially reduce the energy consumed by computing. The collaboration of FLEET researchers from University of Wollongong, Monash University and UNSW have shown in a theoretical study that using topological insulators rather than conventional semiconductors to make transistors could reduce the gate voltage by half, and the energy used by each transistor by a factor of four. To accomplish this, they had to find a way to overcome the famous Boltzmann s tyranny that puts a lower limit on transistor switching energy. ....
Qubits Comprised Of Holes Could Be The Trick To Build Faster, Larger Quantum Computers A new study indicates holes the solution to operational speed/coherence trade-off, potential scaling up of qubits to a mini-quantum computer. Quantum computers are predicted to be much more powerful and functional than today’s ‘classical’ computers. One way to make a quantum bit is to use the ‘spin’ of an electron, which can point either up or down. To make quantum computers as fast and power-efficient as possible we would like to operate them using only electric fields, which are applied using ordinary electrodes. Although spin does not ordinarily ‘talk’ to electric fields, in some materials spins can interact with electric fields indirectly, and these are some of the hottest materials currently studied in quantum computing. ....