Quantum Random Access Memory

A quantum digital circuit, comprising:

• a first Toffoli gate;
• a S gate;
• a SWAP gate;
• and
• a second Toffoli gate.

An electronic communications method, comprising:

• receiving, by one or more Hadamard gates, one or more qubits;
• applying, by the one more Hadamard gates, an algorithm to one or more qubits to address 2n locations in a quantum random access memory (QRAM)
• searching, by a S gate, an address location in the 2n locations;
• assigning, by a quantum processor, by first n qubits of the one or more qubits of the register |qy>,
• marking, by a Toffoli gate, an address which matches the address location associated with the register |qy>,
• applying, by a SWAP gate or another Toffoli gate, a value to the first n qubits;
• removing, by a third Toffoli gate, a marking entangled over qubit |dq>, and applying, by another S gate, to the one more qubits to undo the effect of the S gate.