20240046132. MULTI-MODE COUPLER FOR QUANTUM GATES simplified abstract (INTERNATIONAL BUSINESS MACHINES CORPORATION)

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MULTI-MODE COUPLER FOR QUANTUM GATES

Organization Name

INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor(s)

Muir Kumph of Croton on Hudson NY (US)

MULTI-MODE COUPLER FOR QUANTUM GATES - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240046132 titled 'MULTI-MODE COUPLER FOR QUANTUM GATES

Simplified Explanation

The patent application presents techniques and couplers for managing coupling between qubits. The coupler consists of three Josephson junctions (JJs) and is connected to a first and second qubit. The first and second JJs are symmetrical, allowing for the creation of a first mode of oscillation and a second mode of oscillation opposite to the first mode. The third JJ facilitates a division between the first and second modes. The activation status of a ZZ gate between the qubits can be controlled based on the excitation status of the first mode and the relationship between the first and second modes. When no pulse is applied to the coupler, the ZZ gate is inactive and there is no coupling. When a pulse is applied, the first mode is in an excited state, activating the ZZ gate and creating a coupling between the qubits.

  • Techniques and couplers for managing coupling between qubits are presented.
  • The coupler comprises three Josephson junctions (JJs) and is connected to a first and second qubit.
  • The first and second JJs are symmetrical, allowing for the creation of a first mode of oscillation and a second mode of oscillation opposite to the first mode.
  • The third JJ facilitates a division between the first and second modes.
  • The activation status of a ZZ gate between the qubits can be controlled based on the excitation status of the first mode and the relationship between the first and second modes.
  • When no pulse is applied to the coupler, the ZZ gate is inactive and there is no coupling.
  • When a pulse is applied, the first mode is in an excited state, activating the ZZ gate and creating a coupling between the qubits.

Potential Applications

  • Quantum computing
  • Quantum information processing
  • Quantum communication

Problems Solved

  • Managing coupling between qubits
  • Controlling activation status of ZZ gate
  • Facilitating division between oscillation modes

Benefits

  • Improved control over qubit coupling
  • Enhanced performance of quantum computing systems
  • Increased efficiency in quantum information processing


Original Abstract Submitted

techniques and couplers for managing coupling between qubits are presented. a coupler can be between, and connected to, a first qubit and second qubit. the coupler can comprise three josephson junctions (jjs). the first and second jjs can be symmetrical, which facilitates creation of a first mode of oscillation and second mode of oscillation opposite of the first mode. third jj facilitates a division between the first and second modes. an activation status of a zz gate between the first and second qubits can be controlled based on excitation status of first mode and a relationship between first mode and second mode, the excitation status being based on whether a pulse is applied to the coupler. when no pulse is applied, zz gate is inactive and there is no coupling. when pulse is applied, first mode is in excited state activating zz gate, and there is a coupling between qubits.

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