Patents by Inventor Cristian Urbina

Cristian Urbina has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Device for reinitializing a quantum bit device having two energy states
    Patent number: 6930318
    Abstract: The device for reinitializing to a state |0> a quantum bit device, or Qubit as it is otherwise known, having two states |0> and |1> associated with respective energy levels E0 and E1 where E0<E1 comprises first means (31, 32) for generating a temporary increase in the probability of the quantum bit device relaxing from the state |1> to the state |0> and second means (21) for absorbing the transition energy ?E01=E1?E0 ceded by the quantum bit device when it relaxes from the state |1> to the state |0>. The device is applicable to Qubits having different physical media.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: August 16, 2005
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Denis Vion, Daniel Esteve, Philippe Joyez, Hugues Pothier, Pierre-François Orfila, Cristian Urbina, Eddy Collin, Grégoire Ithier
  • DEVICE FOR REINITIALIZING A QUANTUM BIT DEVICE HAVING TWO ENERGY STATES
    Publication number: 20050098773
    Abstract: The device for reinitializing to a state |0> a quantum bit device, or Qubit as it is otherwise known, having two states |0> and |1> associated with respective energy levels E0 and E1 where E0<E1 comprises first means (31, 32) for generating a temporary increase in the probability of the quantum bit device relaxing from the state |1> to the state |0> and second means (21) for absorbing the transition energy ?E01=E1?E0 ceded by the quantum bit device when it relaxes from the state |1> to the state |0>. The device is applicable to Qubits having different physical media.
    Type: Application
    Filed: December 12, 2003
    Publication date: May 12, 2005
    Inventors: Denis Vion, Daniel Esteve, Philippe Joyez, Hugues Pothier, Pierre-Francois Orfila, Cristian Urbina, Eddy Collin, Gregoire Ithier
  • Superconducting quantum-bit device based on Josephson junctions
    Patent number: 6838694
    Abstract: A superconducting quantum-bit device based on Josephson junction has a charge as a first principal degree of freedom assigned to writing and a phase as a second principal degree of freedom assigned to reading. The device comprises a Cooper-pair box comprising first and second Josephson junctions defining a charge island of the Cooper-pair box closing up onto a superconducting loop. A read circuit comprises a read Josephson junction JL inserted into the superconducting loop and having a Josephson energy Ej at least 50 times greater than the Josephson energy of each of the first and second Josephson junctions.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: January 4, 2005
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Daniel Esteve, Denis Vion, Michel Devoret, Cristian Urbina, Philippe Joyez, Hughes Pothier, Pierre-Francois Orfila, Abdelhahim Aassime, Audrey Cottet
  • Superconducting quantum-bit device based on josephson junctions
    Publication number: 20030207766
    Abstract: A superconducting quantum-bit device based on Josephson junction has a charge as a first principal degree of freedom assigned to writing and a phase as a second principal degree of freedom assigned to reading. The device comprises a Cooper-pair box comprising first and second Josephson junctions defining a charge island of the Cooper-pair box closing up onto a superconducting loop. A read circuit comprises a read Josephson junction JL inserted into the superconducting loop and having a Josephson energy Ej at least 50 times greater than the Josephson energy of each of the first and second Josephson junctions.
    Type: Application
    Filed: September 16, 2002
    Publication date: November 6, 2003
    Inventors: Daniel Esteve, Denis Vion, Michel Devoret, Cristian Urbina, Philippe Joyez, Hughes Pothier, Pierre-Francois Orfila, Abdelhahim Aassime, Audrey Cottet