Iqra Naz - Department of Software Engineering, NED University of Engineering and Technology, Karachi, Pakistan
Muhammad Miqdad Khan - Department of Physics, NED University of Engineering and Technology, Karachi, Pakistan

Quantum circuits are ideal for most of themodern world problems. They are more efficient and reliablefor many computations that are a challenge for classicalcomputers. Beside this they are themselves more complex todeal with and too much costly to build. Cost is the mostcrucial factor for designing or implementation of any circuitbut when it comes to quantum circuits it becomes the mostunavoidable part of design technique. The hadamard-unitarysandwich technique has an amazing cost reduction potentialin quantum circuits. In this paper we have discussed abouthow H-U-H sandwich technique came up with a breakthrough minimizing the circuit complexity and played leadingrole in cost reduction of quantum circuits by minimizingnumber of gates used. This method also helps in achievinghigh computation power and efficiency with more feasibility.

Quantum circuit; H-U-H sandwich technique; Diagonal matrix; Quantum computing