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RelatedIn quantum computing, a qubit or quantum bit is a unit of quantum information. A qubit is a two-state quantum-mechanical system and is the quantum analogue of the classical bit. In a classical system, a bit would have to be in one state or the other. However, quantum mechanics allows the qubit to be in a superposition of both states at the same time. The possible states for a single qubit can be visualized using a Bloch sphere (see figure 1). Represented on such a sphere, a classical bit could only be at the "North Pole" or the "South Pole", in the locations where I0> and I1> are respectively. The rest of the surface of the sphere is inaccessible to a classical bit, but a qubit state can be represented by any point on the surface or inside of it. Figure 1: Bloch sphere representation of a qubit In the quantum information community, the Bloch Sphere plays a unifying role, because all qubits can be represented this way, no matter how they are practically realized. The most well-known two-level system is the spin^(-1⁄2) particle and other systems are frequently mapped on the spin^(-1⁄2) for better intuition. A general pure state of the qubit can be written in the form: Requirement There are various types of experiments performed in the field of controlling quantum bits, as one experiment can be significantly different from another. Therefore, we will explain in general a common set up for a superconducting qubit experiment. We will focus on the AWG part of the experiment set up: Qubit rotations (on the Bloch sphere) are generated using a wideband I-Q modulated microwave signal generator. The control voltages applied to I and Q entries of a mixer, are generated using two of the four

[Jwcp2424]

[Jwcp2424]

@[]()In quantum computing, a qubit or quantum bit is a unit of quantum information. A qubit is a two-state quantum-mechanical system and is the quantum analogue of the classical bit. In a classical system, a bit would have to be in one state or the other. However, quantum mechanics allows the qubit to be in a superposition of both states at the same time. The possible states for a single qubit can be visualized using a Bloch sphere (see figure 1). Represented on such a sphere, a classical bit could only be at the "North Pole" or the "South Pole", in the locations where I0> and I1> are respectively. The rest of the surface of the sphere is inaccessible to a classical bit, but a qubit state can be represented by any point on the surface or inside of it. Figure 1: Bloch sphere representation of a qubit In the quantum information community, the Bloch Sphere plays a unifying role, because all qubits can be represented this way, no matter how they are practically realized. The most well-known two-level system is the spin^(-1⁄2) particle and other systems are frequently mapped on the spin^(-1⁄2) for better intuition. A general pure state of the qubit can be written in the form: Requirement There are various types of experiments performed in the field of controlling quantum bits, as one experiment can be significantly different from another. Therefore, we will explain in general a common set up for a superconducting qubit experiment. We will focus on the AWG part of the experiment set up: Qubit rotations (on the Bloch sphere) are generated using a wideband I-Q modulated microwave signal generator. The control voltages applied to I and Q entries of a mixer, are generated using two of the four