Fault-tolerant scalable modular quantum computer architecture with an enhanced control of multi-mode couplings between trapped ion qubits

A quantum computer comprising:

• a plurality of logic units, the plurality of logic units comprising:
• a first logic unit including a first plurality of qubits, the first plurality of qubits including a first ion qubit,
• a second logic unit including a second plurality of qubits, the second plurality of qubits including a second ion qubit, and
• a third logic unit including a third plurality of qubits, the third plurality of qubits including a third ion qubit;
• a laser configured to:
• stimulate a state transition T1 of the first ion qubit,
• stimulate a state transition T2 of the second ion qubit, and
• stimulate a state transition T3 of the third ion qubit and a subsequent state transition T4 of the third ion qubit;
• and
• a photonic interconnect network, operatively coupled to the plurality of logic units, to connect, via multiplexing, the result of state transition T3 to the first logic unit and the result of state transition T4 to the second logic unit by mapping the result of state transition T3 and the result of state transition T4 to respective photons propagated through the photonic interconnect network.

A quantum computer comprising:

• a plurality of logic units, the plurality of logic units comprising:
• a first logic unit including a first plurality of qubits, the first plurality of qubits including a first ion qubit,
• a second logic unit including a second plurality of qubits, the second plurality of qubits including a second ion qubit, and
• a third logic unit including a third plurality of qubits, the third plurality of qubits including a third ion qubit and a fourth ion qubit;
• a laser configured to:
• stimulate a state transition T1 of the first ion qubit,
• stimulate a state transition T2 of the second ion qubit,
• stimulate a state transition T3 of the third ion qubit, and
• stimulate a state transition T4 of the fourth ion qubit;
• and
• a photonic interconnect network, operatively coupled to the plurality of logic units, to connect, via multiplexing, the result of state transition T3 to the first logic unit and the result of state transition T4 to the second logic unit by mapping the result of state transition T3 and the result of state transition T4 to respective photons propagated through the photonic interconnect network.