• UCSBgauchos twitter avatar
    WWP Captures History with First Ever Big West Championship! RECAP https://t.co/VtSwS4GVd8
    6 hours 15 min ago
  • ucsantabarbara twitter avatar
    What's all this 'buzz' about? Find out here: https://t.co/DjvGfLgg8r https://t.co/TqjbZHur68
    6 hours 31 min ago
  • UCSBgauchos twitter avatar
    .@UCSB_Baseball walks off on Hawaii to finish sweep & win 16th straight at home. RECAP >>> https://t.co/9QcccfjiPe https://t.co/zXnR1riZek
    7 hours 34 min ago
  • UCSBgauchos twitter avatar
    Three Big West titles in 2 days for UCSB. Not bad.
    10 hours 5 min ago
  • UCSBgauchos twitter avatar
    UCSB celebrates its first Big West WWP title and NCAA bid ever! https://t.co/JZITF8MwAw
    10 hours 6 min ago
  • ucsantabarbara twitter avatar
    Today is the deadline for incoming freshmen to SIR. Do you remember when you officially became a #FutureGaucho? https://t.co/DuurN2Whil
    15 hours 26 min ago
  • ArtsandLectures twitter avatar
    RT @TheBarbBuzz: Arlington Theatre is buzzing again: https://t.co/p85cLiQIjO - RT @ArtsandLectures David Sedaris is bringing stories and la…
    1 day 5 hours ago
  • UCSBgauchos twitter avatar
    Gauchos Battle to Doubleheader Split in Final Home Games of 2016 https://t.co/dG52Hvk7SR
    1 day 6 hours ago
  • ArtsandLectures twitter avatar
    RT @randomhouse: In Santa Barbara? Come see Jill Leovy and David Sedaris at UCSB @ArtsandLectures TOMORROW at 7PM.
    1 day 7 hours ago
  • ArtsandLectures twitter avatar
    RT @grupocorpo: #video da turne nos Estados Unidos - ep 2 | @ArtsandLectures @whitebirddance #grupocorpo #USAtour https://t.co/8qEXvAZLFk
    1 day 7 hours ago
  • ArtsandLectures twitter avatar
    David Sedaris is bringing stories and laughs to the Arlington Theatre on Sunday at 7. @ArtsandLectures #funnyman #ThisAmericanLife
    1 day 7 hours ago
  • UCSBgauchos twitter avatar
    Grover's blast gives @UCSB_Baseball its 15th straight home W, a new program record! RECAP >> https://t.co/LkmDfIw4p0 https://t.co/sTMUGB582j
    1 day 7 hours ago
  • UCSBgauchos twitter avatar
    Murphy's Golden Goal Sends No. 9 UCSB to Championship Game! https://t.co/jcuBJ59FGQ
    1 day 8 hours ago
  • ucsantabarbara twitter avatar
    #UCSB students develop skills while producing deliverables that solve environmental problems for real-world clients. https://t.co/txhMIVw3Hr
    1 day 15 hours ago
  • UCSBgauchos twitter avatar
    Palomares's RBI Doubles Power UCSB to 9-3 Win Over Hawai'i https://t.co/X9BzJu0sVy
    2 days 5 hours ago

UCSB Physicists Demonstrate the Quantum von Neumann Architecture, a Quantum Processor, and a Quantum Memory on a Chip

Thursday, September 1, 2011 - 17:00
Santa Barbara, CA

A new paradigm in quantum information processing has been demonstrated by physicists at UC Santa Barbara. Their results are published in this week's issue of Science Express online.

UCSB physicists have demonstrated a quantum integrated circuit that implements the quantum von Neumann architecture. In this architecture, a long-lived quantum random access memory can be programmed using a quantum central processing unit, all constructed on a single chip, providing the key components for a quantum version of a classical computer.

The UCSB hardware is based on superconducting quantum circuits, and must be cooled to very low temperatures to display quantum behavior. The architecture represents a new paradigm in quantum information processing, and shows that quantum large-scale-integration

is within reach.

The quantum integrated circuit includes two quantum bits (qubits), a quantum communication bus, two bits of quantum memory, and a resetting register comprising a simple quantum computer. "Computational steps take a few billionths of a second, comparable to a classical computer, but the great power is that a quantum computer can perform a large number of calculations simultaneously," said Matteo Mariantoni, postdoctoral fellow in the Department of Physics. "In our new UCSB architecture we have explored the possibility of writing quantum information to memory, while simultaneously performing other quantum calculations.

"On the quantum von Neumann architecture, we were able to run the quantum Fourier transform and a three-qubit Toffoli gate –– key quantum logic circuits for the further development of quantum computing," said Mariantoni.

 

The UCSB experiment was pursued primarily by Mariantoni, under the direction of Andrew N. Cleland and John M. Martinis, both professors of physics. Mariantoni was supported in this work by an Elings Prize Fellowship in Experimental Science from UCSB's California NanoSystems Institute.

 

 

 


 

 

[RETURN TO TOP]  

 

 

Top photo: The quantum von Neumann machine: Two qubits are coupled to a quantum bus, realizing a quCPU. Each qubit is accompanied by a quantum memory as well as a zeroing register. The quantum memories together with the zeroing register realize the quRAM.
Credit: Peter Allen, UCSB

 

Cleland Group
Martinis Group