Six-State Memristor Opens Door to Weird Computing(spectrum.ieee.org)

74 pointsby kavalecvor 12 Jahren21 comments

spectrum.ieee.org

Six-State Memristor Opens Door to Weird Computing

http://spectrum.ieee.org/semiconductors/memory/sixstate-memristor-opens-door-to-weird-computing

8 comments

taconvor 12 Jahren

Stan Williams of HP Labs gave a talk recently at Rice, his alma mater. He was describing the "HP Machine" they are working on, with memristors at the bottom of a hardware and software stack rearchitected from scratch. Don't look to be able to buy any memristors from HP anytime soon. HP predicts that their own internal demand, in producing the HP Machine, will consume all their memristor production for years.

grondiluvor 12 Jahren

> Stan Williams of HP Labs gave a talk recently at Rice

Any link?

taconvor 12 Jahren

Here is the abstract of the talk. There was a video made, but I don't see it online yet.

http://www.k2i.rice.edu/EventsList.aspx?EventRecord=23375

ehsanu1vor 12 Jahren

Managed to find it here: https://mediacosmos.rice.edu/app/plugin/embed.aspx?ID=vVUTzF...

cbennettvor 12 Jahren

thanks very much for this! had been looking for some time for a quite recent Williams talk

glibgilvor 12 Jahren

Here you go https://news.ycombinator.com/item?id=8651143

grondiluvor 12 Jahren

Haha.

walterbellvor 12 Jahren

Let's see if one of four fundamental electronic components will be independently productized and sold by other vendors or countries to everyone-but-HP. Anyone remember IBM hardware monopolies?

Would we like a world where HP makes memristors, Google makes resistors, Amazon makes capacitors, and everyone else waits for leftover inventory?

vegedorvor 12 Jahren

ChuckMcMvor 12 Jahren

Oh that is pretty clever. I wonder what the write time is. Even a reliable 6 level memory would be useful giving you four useful states (2 bits), a non-initialized, and an initialized undef state.

chmvor 12 Jahren

    For example, the largest unsigned binary 64-bit integer—18,446,744,073,709,551,615—
    could be held in 20 bits instead of 64.

This should read "could be held in 20 digits instead of 64 bits."

jlangenauervor 12 Jahren

If "bit" is a portmanteau of "binary digit", wouldn't the analogue in a senary[1] number system be a "sit"?

[1] http://en.wikipedia.org/wiki/Senary

FD3SAvor 12 Jahren

This is an interesting implementation of the memristor, but I still think the real breakthrough will be in the two state memristor [1]. Once memristor fabrication technology is mature, we are going to see a massive paradigm shift away from the Von Neumann architecture.

All the details are in the linked video by HP's Stan Williams. Definitely worth a watch if you're interested in the future of computing

1. https://www.youtube.com/watch?v=bKGhvKyjgLY (start at 38m for future computing implications)

EDIT:

Another video [2], but a bit more in depth. Recommended if the material in the first was a bit confusing as Stan was short on time to explain some of the details.

2. https://www.youtube.com/watch?v=QFdDPzcZwbs

sliverstormvor 12 Jahren

he doesn't seem to talk about the end of the Von Neuman architecture. Explain that part?

FD3SAvor 12 Jahren

Start here, around the 38 min mark:

http://youtu.be/bKGhvKyjgLY?t=37m59s

sliverstormvor 12 Jahren

yeah, still don't see where he talks about architecture. He explains how memristors can be used for logic, but con Neuman is not implicitly wedded to transistors.

Don't get me wrong, I think they will be useful.

cbennettvor 12 Jahren

Here is the paper for any one curious in a look at the actual configuration of the nanowire device: thankfully there is no pay-gating http://pubs.acs.org/doi/abs/10.1021/nn505139m

ivanchevor 12 Jahren

I found interesting that world's first mechanical computer, Charles Babbage's "Analytical Machine" had a base-10 fixed point arithmetic [1], and we could soon have base-10 RRAM...

[1] https://en.wikipedia.org/wiki/Analytical_Engine

rpedelavor 12 Jahren

Assuming they work out performance and other engineering issues, could this be used to implement something like qubits?

acjohnson55vor 12 Jahren

There's nothing in the article that would make me think that this is the case. A qubit is a fundamentally different concept, in which a computation can be performed on all possible states simultaneously. This seems to just be getting more states out of a single classical element.

adrianNvor 12 Jahren

No, you can think of a qubit as a unit vector in the complex plane. It can have two real values, but also all kinds of complex values. Computing with a qubit is rotating the vector around, measuring it collapses its imaginary state to a real state. The probability which state you get depends on the rotation at the time of the measurement.

rasz_plvor 12 Jahren

so how is that any different from NAND MLC and TLC? I bet they already got it patented with a cute "on a memristor" at the end of application title.