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Can a double controlled gate be used in quantum computing?
Furthermore, we will show that this double-controlled gate can be used to implement the three-qubit Deutsch gate and is therefore universal for quantum computing in itself, adding yet another tool in our toolbox for efficient quantum gates.
How are quantum gates used in holonomic computing?
This system can efficiently accomplish various quantum information tasks, including generation of entanglement of the two qubits and conditional three-qubit quantum gates, such as the Toffoli and Fredkin gates. Furthermore, the system realizes a conditional geometric gate which may be used for holonomic (non-adiabatic) quantum computing.
Which is an efficient tunable quantum gate system?
Here we propose a superconducting circuit for implementing a tunable system consisting of a qutrit coupled to two qubits. This system can efficiently accomplish various quantum information tasks, including generation of entanglement of the two qubits and conditional three-qubit quantum gates, such as the Toffoli and Fredkin gates.
Which is a universal gate in a logic circuit?
A universal gate is a gate which can implement any Boolean function without need to use any other gate type. The NAND and NOR gates are universal gates. In practice, this is advantageous since NAND and NOR gates are economical and easier to fabricate and are the basic gates used in all IC digital logic families.
How are quantum gates described as unitary operators?
Quantum gates are unitary operators, and are described as unitary matrices relative to some basis. Usually we use the computational basis, which unless we compare it with something, just means that we for a d -level quantum system (such as a qubit, or a quantum register) have labeled the orthogonal basis vectors
When do you use controlled ZZ in Qiskit?
Just as the CNOT applies an XX to its target qubit whenever its control is in state | 1⟩|1⟩, the controlled- ZZ applies a ZZ in the same case. In Qiskit it can be invoked directly with where c and t are the control and target qubits.
What should the coupling strengths of a quantum gate be?
For typical experimental parameters, the coupling strengths J ’s are in the range of few to some tenths of MHz, while the energies Δ’s and δ ’s are in the 10 GHz range. We choose realistic values of the experimental parameters so as to stay within the transmon regime 13.