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I am trying to implement a full adder with minimum of 8 qubits to add two 4 bit integers. Integer 1 will be added on q[0-3] while integer 2 will be added on q[4-7]. The output will be measured on q[0-3].

So far I created a full adder to be measured on 2 states but I am having trouble manipulating this code to measure on 4 states. Below is qiskit code:

qc = QuantumCircuit(8,2)

AND gate1 implementation


qc.ccx(0,1,3)


OR gate1 implementation


qc.cx(0,4) 
qc.cx(1,4)


OR gate2 implementation


qc.cx(2,5) 
qc.cx(4,5)


AND gate2 implementation


qc.ccx(2,4,6)


OR gate implementation


qc.x(3)
qc.x(6)
qc.ccx(3,6,7)
qc.x(7)
Bob
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1 Answers1

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If you are aiming to perform arithmetic on a quantum computer, you should take a look at methods that involve the Quantum Fourier Transform: https://arxiv.org/abs/2005.00443

Quantum Brilliance
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