TY - JOUR
AU - Andriichuk, Valentyn
AB - We propose an experimentally feasible scheme for a source of itinerant microwave photons. It also features a quantum router that controls the direction of quantum microwave signals. This scheme consists of two superconducting qubits coupled to the transmission line in different regimes (strong and dispersive coupling). The dispersive coupling induces a shift in the resonance frequencies of coupled resonators, which depend on the dispersively coupled qubit state. We use this qubit to switch the direction of photon emission so that one output channel is blocked and the other is open, and vice versa, by changing the qubit state. We tune the bare frequencies of resonators and other system parameters to obtain a high efficient routing of photons. To demonstrate it, we implement a theoretical model of the proposed scheme and use the Jaynes–Cummings approach to describe the photon-matter interaction. We formulate a time-dependent wave function to study the behaviour of the proposed system. We derive and numerically solve a set of equations of motion governing the evolution of a single-photon wave packet. As a result, it is shown that the quantum signal can be routed in one of the two channels with high efficiency—nearly 90%.
TI - Single-Photon Source with Emission DirectionControlled by aQubit State
JF - Journal of Low Temperature Physics
DO - 10.1007/s10909-023-02978-y
DA - 2023-08-01
UR - https://www.deepdyve.com/lp/springer-journals/single-photon-source-with-emission-directioncontrolled-by-aqubit-state-hG00wo48Wx
SP - 91
EP - 112
VL - 212
IS - 3-4
DP - DeepDyve
ER -