First Quantum Computer With Quantum CPU And Separate Quantum RAM

Quantum computers are still in a very early experimental stage. Even the underlying technology best used to implement a quantum computer hasn’t yet been settled upon. The problem is that qubits, the basic objects that a quantum computer works with, are very difficult to control. So it’s not surprising that the larger scale architecture of quantum computers is also not yet determined. Up until now, experimental architectures have not been like the easily reprogrammable Von Neumann architecture of all modern electronic computers. But finally that architecture is being explored for quantum computers.

First Quantum Computer With Quantum CPU And Separate Quantum RAM – Technology Review

Today, Matteo Mariantoni at the UC Santa Barbara and pals reveal the first quantum computer with an information processing unit and a separate random access memory.

Their machine is a superconducting device that stores quantum bits or qubits as counter-rotating currents in a circuit (this allows the qubit to be both a 0 and 1 at the same time). These qubits are manipulated using superconducting quantum logic gates, transferred using a quantum bus and stored in separate microwave resonators.

Let’s say upfront that the result is not a particularly powerful computer. Mariantoni and co show off their device by demonstrating a couple of simple but unspectacular algorithms but ones that were carefully chosen as the building blocks of more impressive tasks such as error correction and factoring large numbers.

Not that they’ve actually done any of those things. What’s impressive, however, is that they soon could since this approach is eminently scalable.

Further reading:

Could this quantum computer be the real deal?

UCSB physicists demonstrate the quantum von Neumann architecture

Implementing the Quantum von Neumann Architecture with Superconducting Circuits

Implementing the Quantum von Neumann Architecture with Superconducting Circuits

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: