Qubit array, quantum computer, and quantum information processing method

A quantum information processing method performed by a qubit array having at least two quantum dot lines extending in a first direction,

• the qubit array including
• a single qubit gate section for performing a single qubit gate operation for a plurality of quantum bits on the quantum dot lines,
• an entanglement state generation section that includes a longitudinal two qubit gate section for performing a two qubit gate operation in the first direction for the plurality of quantum bits and a lateral two qubit gate section for performing a two qubit gate operation in a second direction for the plurality of quantum bits, the second direction being different from the first direction,
• an XY single qubit gate section for performing a rotation operation around a preset arbitrary axis for the plurality of quantum bits according to a program given from outside,
• a Z measurement section for performing a measurement operation for the plurality of quantum bits, and
• a control section for moving the plurality of quantum bits in the first direction,
• the method comprising:
• a first step of performing a single qubit gate operation for a first quantum bit and a second quantum bit in the single qubit gate section;
• a second step of moving the first quantum bit and the second quantum bit to the entanglement state generation section by the control section;
• a third step of entangling the first quantum bit and the second quantum bit in the entanglement state generation section;
• a fourth step of moving the first quantum bit and the second quantum bit to the XY single qubit gate section by the control section;
• a fifth step of performing the rotation operation for at least one of the first quantum bit and the second quantum bit in the XY single qubit gate section;
• a sixth step of moving the first quantum bit and the second quantum bit to the Z measurement section by the control section;
• and
• a seventh step of performing the measurement operation for at least one of the first quantum bit and the second quantum bit in the Z measurement section.