Nonadiabatic holonomic gates realized by a single-shot implementation

Implementation of Single-Qutrit Quantum Gates via Tripod Adiabatic Passage

We proposed and analyzed implementation of the single-qutrit quantum gates based on stimulated Raman adiabatic passage (STIRAP) between magnetic sublevels in atoms coupled by pulsed laser fields. This technique requires only the control of the relative phase of the driving fields but do not involve any dynamical or geometrical phases, which make it independent of the other interaction details: ...

Single-step implementation of universal quantum gates.

We construct optimized implementations of the controlled-NOT and other universal two-qubit gates that, unlike many of the previously proposed protocols, are carried out in a single step. The new protocols require tunable interqubit couplings but, in return, show a significant improvement in the quality of gate operations. We make specific predictions for coupled Josephson junction qubits and co...

Optical holonomic single quantum gates with a geometric spin under a zero field

Robust gates for holonomic quantum computation

Giuseppe Florio, 2 Paolo Facchi, 2 Rosario Fazio, 5 Vittorio Giovannetti, and Saverio Pascazio Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy INFN, Sezione di Bari, I-70126 Bari, Italy Dipartimento di Matematica, Università di Bari, I-70125 Bari, Italy NEST CNR-INFM & Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy International School for Advanced Studies (...

Exact solutions for universal holonomic quantum gates

We show how one can implement any local quantum gate on specific qubits in an array of qubits by carrying adiabatically a Hamiltonian around a closed loop. We find the exact form of the loop and the Hamiltonian for implementing general one and two qubits gates. Our method is analytical and is not based on numerical search in the space of all loops. email:[email protected] email:[email protected]...