Analysis of an experimental quantum logic gate by complementary classical operations
arXiv:quant-ph/0608005 · doi:10.1142/S0217732306021281
Abstract
Quantum logic gates can perform calculations much more efficiently than their classical counterparts. However, the level of control needed to obtain a reliable quantum operation is correspondingly higher. In order to evaluate the performance of experimental quantum gates, it is therefore necessary to identify the essential features that indicate quantum coherent operation. In this paper, we show that an efficient characterization of an experimental device can be obtained by investigating the classical logic operations on a pair of complementary basis sets. It is then possible to obtain reliable predictions about the quantum coherent operations of the gate such as entanglement generation and Bell state discrimination even without performing these operations directly.
14 pages, 1 figure, 3 tables, Brief Review for Modern Physics Letters A, includes a more detailed analysis of the experimental data in Phys. Rev. Lett. 95, 210506 (2005) (quant-ph/0506263). v2 has minor corrections in layout
References in corpus (17)
- Separability of Mixed States: Necessary and Sufficient Conditions
- Measurement of conditional phase shifts for quantum logic
- Bell Inequalities and the Separability Criterion
- Quantum oscillations in two coupled charge qubits
- Complete Characterization of a Quantum Process: the Two-Bit Quantum Gate
- Optimization of entanglement witnesses
- Detecting Genuine Multipartite Entanglement with Two Local Measurements
- Linear Optical CNOT Gate in the Coincidence Basis
- Experimental Controlled-NOT Logic Gate for Single Photons in the Coincidence Basis
- Linear Optics C-Phase gate made simple
- 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
- Quantum phase gate for photonic qubits using only beam splitters and post-selection
- Experimental Teleportation of a Quantum Controlled-NOT Gate
- Experimental demonstration of a non-destructive controlled-NOT quantum gate for two independent photon-qubits
- Complementary classical fidelities as an efficient criterion for the evaluation of experimentally realized quantum operations
- Quantum parallelism of the controlled-NOT operation: an experimental criterion for the evaluation of device performance