Topological insulators are pretty new. quantum spin Hall state. Theory in 2005. Confirmed here in 2013. 2019 a new binary switch – which doubles as memory – called vTOPPS is shown theoretically. Next I expect a laptop running off button batteries that you pick up and put down once a day to recharge. https://www.youtube.com/watch?v=O0_246aodCU “Topological insulators’ edge currents are characteristic of a new state of matter, the quantum spin Hall state, which was first proposed in 2005-6 by theorists Charles Kane of the University of Pennsylvania and Shoucheng Zhang of Stanford and SIMES and colleagues. They predicted that electrons of opposite spin would move in opposite directions along a topological insulator’s edges without dissipating heat. These two unusual and desirable properties could ultimately lead to new types of “spintronic” devices that exploit electrons’ spins, rather than merely their charges, to store information.”

Topological insulators are pretty new. quantum spin Hall state.
 
Theory in 2005. Confirmed here in 2013. 2019 a new binary switch – which doubles as memory – called vTOPPS is shown theoretically.
 
Next I expect a laptop running off button batteries that you pick up and put down once a day to recharge.
 
https://www.youtube.com/watch?v=O0_246aodCU
 
 
“Topological insulators’ edge currents are characteristic of a new state of matter, the quantum spin Hall state, which was first proposed in 2005-6 by theorists Charles Kane of the University of Pennsylvania and Shoucheng Zhang of Stanford and SIMES and colleagues. They predicted that electrons of opposite spin would move in opposite directions along a topological insulator’s edges without dissipating heat. These two unusual and desirable properties could ultimately lead to new types of “spintronic” devices that exploit electrons’ spins, rather than merely their charges, to store information.”
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More on spintronics and computer memory. History to present. By DARPA. The development of vTOPPS now has me convinced that YES, qubits will be a pragmatic reality.

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