Chinese Optics Letters, Volume. 15, Issue 9, 092701(2017)
Effect of unbalanced and common losses in quantum photonic integrated circuits
Fig. 1. Eigenmodes of coupled waveguides. (a) A schematic of a directional coupler. (b) The cross-section electric field distributions of the eigenmodes for different cases. From the left column to right, the pictures correspond to the (i) ideal case
Fig. 2. (Color online) Two coupled waveguides with an unbalanced linear loss. (a) By injecting a single photon in port 1 in Fig.
Fig. 3. (Color online) Single-photon and two-photon interference on a BS with shared CL. (a) Relative probability in two waveguides with single-photon input. (b) The mode overlap
Fig. 4. (Color online) Fidelity of quantum gates formed by a BS with shared loss. All quantum gates are decomposed to BSs and phase shifters and we assume the phase shifters are ideal. The fidelity is the minimum value searched through all input quantum states. (a) The gate fidelity for a BS, single-qubit operation, and quantum C-NOT gate. (b) The minimum fidelity for any two-qubit gate and any two-qubit quantum state. In the calculations,
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Ming Li, Changling Zou, Guangcan Guo, Xifeng Ren. Effect of unbalanced and common losses in quantum photonic integrated circuits[J]. Chinese Optics Letters, 2017, 15(9): 092701
Category: Quantum optics
Received: Mar. 16, 2017
Accepted: May. 23, 2017
Published Online: Jul. 19, 2018
The Author Email: Xifeng Ren (renxf@ustc.edu.cn)