Figure 1
From: Qubit gate operations in elliptically trapped polariton condensates
(a) Sketch of the proposed polariton condensate qubit system. Two polariton condensates are formed at distinct regions of a microcavity plane, within an elliptical trap in the presence of a nonresonant continuous wave (CW) laser pump with a hexagonal shape. These trapped condensates host superfluid circularly current states whose direction is defined by opposite OAM, as represented by the red circled arrows in each trap. The linear combination of clockwise and anticlockwise OAM states defines the orthogonal \(|p_x\rangle\)- and \(|p_y\rangle\)-modes in the optically generated trap and are the basis states for a two-level qubit in each polariton condensate. Both the initial qubit states and qubit gates for an individual trap can be tuned by the corresponding auxiliary off-resonant laser beams. Moreover, the coupling between two qubits can be switched on and off by a control laser pulse that creates a potential barrier between the two traps (not shown). (b) Spatial representation of the p-modes, corresponding to the qubit basis states. The right panel illustrates the energy splitting \(\Delta \varepsilon\) between the modes, which can be tuned by stretching out the hexagonal trap.
