Control and enhancement of interferometric coupling between two photonic qubits
arXiv:1701.05220 · doi:10.1103/PhysRevA.93.042321
Abstract
We theoretically investigate and experimentally demonstrate a procedure for conditional control and enhancement of an interferometric coupling between two qubits encoded into states of bosonic particles. Our procedure combines local coupling of one of the particles to an auxiliary mode and single-qubit quantum filtering. We experimentally verify the proposed procedure using a linear optical setup where qubits are encoded into quantum states of single photons and coupled at a beam splitter with a fixed transmittance. With our protocol, we implement a range of different effective transmittances, demonstrate both enhancement and reduction of the coupling strength, and observe dependence of two-photon bunching on the effective transmittance. To make our analysis complete, we also theoretically investigate a more general scheme where each particle is coupled to a separate auxiliary mode and show that this latter scheme enables to achieve higher implementation probability. We show that our approach can be extended also to other kinds of qubit-qubit interactions.
arXiv comment11 pages, 9 figures, REVTeX4
References in corpus (23)
- The Quantum Internet
- Review article: Linear optical quantum computing
- Quantum information with Rydberg atoms
- Multi-photon entanglement and interferometry
- Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
- Quantum computing with trapped ions
- Boson Sampling on a Photonic Chip
- Experimental Boson Sampling
- Experimental boson sampling in arbitrary integrated photonic circuits
- Photonic Boson Sampling in a Tunable Circuit
- Realization of Three-Qubit Quantum Error Correction with Superconducting Circuits
- Implementation of a Toffoli Gate with Superconducting Circuits
- Linear Optical CNOT Gate in the Coincidence Basis
- Linear Optics C-Phase gate made simple
- Amplifying Single-Photon Nonlinearity Using Weak Measurement
- Demonstration of a simple entangling optical gate and its use in Bell-state analysis
- Demonstration of an optical quantum controlled-NOT gate without path interference
- On the experimental verification of quantum complexity in linear optics
- Experimental quantum process tomography of non trace-preserving maps
- Efficient experimental estimation of fidelity of linear optical quantum Toffoli gate
- Experimental implementation of the optimal linear-optical controlled phase gate
- Fock-state view of weak-value measurements and implementation with photons and atomic ensembles
- Quantum controlled-Z gate for weakly interacting qubits