Towards waveshape-insensitive flying qubit gates
- authored by
- I. Babushkin, U. Morgner, A. Demircan
- Abstract
Temporal/spectral waveshapes of photons involved in gate operation are absolutely crucial for the gate operation. In particular, if we consider linear logic approaches [1] the photons in different channels should be un-correlated and indistinguishable [2] , [3]. The waveshape is also important for so called coherent photon conversion (CPC) proposed in [4]. It uses four wave mixing (FWM) between single-photons in presence of a strong coherent field. For instance, two photons in the distinct modes which we call here signal s and idler i (see Fig. 1a ) can be converted into a pump p photon and then back, demonstrating Rabi-like oscillations; after each oscillation, the phase of the wavepacket is shifted by π , leading to a nonlinear sign (NS) gate functionality. However, since only time-coincident ( t i = t s ) parts of the two-photon wavepacket interact, almost any waveshape leads to a non-ideal gate operation [5]. This problem was elegantly solved in [6] where the signal and idler are assumed to propagate through each other with nonzero velocity (see Fig. 1a ), and interaction of independent photons was demonstrated.
- Organisation(s)
-
Institute of Quantum Optics
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
- Type
- Conference contribution
- Publication date
- 2021
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Mechanics of Materials
- Electronic version(s)
-
https://doi.org/10.1109/CLEO/Europe-EQEC52157.2021.9542122 (Access:
Closed)