Demonstration of a Simple Entangling Optical Gate and Its Use in Bell-State Analysis
Abstract
We demonstrate a new architecture for an optical entangling gate that is significantly simpler than previous realizations, using partially polarizing beam splitters so that only a single optical mode-matching condition is required. We demonstrate operation of a controlled-z gate in both continuous-wave and pulsed regimes of operation, fully characterizing it in each case using quantum process tomography. We also demonstrate a fully resolving, nondeterministic optical Bell-state analyzer based on this controlled-z gate. This new architecture is ideally suited to guided optics implementations of optical gates.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 2005
- DOI:
- arXiv:
- arXiv:quant-ph/0506262
- Bibcode:
- 2005PhRvL..95u0504L
- Keywords:
-
- 03.67.Lx;
- 03.65.Wj;
- 03.67.Mn;
- 42.50.Dv;
- Quantum computation;
- State reconstruction quantum tomography;
- Entanglement production characterization and manipulation;
- Nonclassical states of the electromagnetic field including entangled photon states;
- quantum state engineering and measurements;
- Quantum Physics
- E-Print:
- 4 pages, 3 figures. v2: additional author, improved data and figures (low res), some other minor changes. Accepted for publication in PRL