Demonstration of a fundamental quantum logic gate
Abstract
We demonstrate the operation of a two-bit ``controlled-NOT'' quantum logic gate, which, in conjunction with simple single-bit operations, forms a universal quantum logic gate for quantum computation. The two quantum bits are stored in the internal and external degrees of freedom of a single trapped atom, which is first laser cooled to the zero-point energy. Decoherence effects are identified for the operation, and the possibility of extending the system to more qubits appears promising.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 1995
- DOI:
- 10.1103/PhysRevLett.75.4714
- Bibcode:
- 1995PhRvL..75.4714M
- Keywords:
-
- 89.80.+h;
- 03.65.-w;
- 32.80.Pj;
- Quantum mechanics;
- Optical cooling of atoms;
- trapping