| dc.creator | Taddei, Márcio M. | |
| dc.creator | Cariñe Catrileo, Jaime | |
| dc.creator | Martínez, Daniel | |
| dc.creator | García, Tania | |
| dc.creator | Guerrero, Nayda | |
| dc.creator | Abbott, Alastair A. | |
| dc.creator | Araújo, Mateus | |
| dc.creator | Branciard, Cyril | |
| dc.creator | Gómez, Esteban S. | |
| dc.creator | Walborn, Stephen P. | |
| dc.creator | Aolita, Leandro | |
| dc.creator | Lima, Gustavo | |
| dc.date | 2021-12-27T00:38:39Z | |
| dc.date | 2021-12-27T00:38:39Z | |
| dc.date | 2021-02 | |
| dc.date.accessioned | 2022-10-18T12:08:35Z | |
| dc.date.available | 2022-10-18T12:08:35Z | |
| dc.identifier | PRX Quantum, Vol. 2, Iss. 1, February - April 2021, 0103200 | |
| dc.identifier | 2691-3399 | |
| dc.identifier | http://repositoriodigital.ucsc.cl/handle/25022009/2564 | |
| dc.identifier | 10.1103/PRXQuantum.2.010320 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4442142 | |
| dc.description | Artículo de publicación ISI | |
| dc.description | Models for quantum computation with circuit connections subject to the quantum superposition principle have recently been proposed. In them, a control quantum system can coherently determine the order in which a target quantum system undergoes N gate operations. This process, known as the quantum N-switch, is a resource for several information-processing tasks. In particular, it provides a computational advantage—over fixed-gate-order quantum circuits—for phase-estimation problems involving N unknown unitary gates. However, the corresponding algorithm requires an experimentally unfeasible target-system dimension (super)exponential in N. Here, we introduce a promise problem for which the quantum N-switch gives an equivalent computational speedup with target-system dimension as small as 2 regardless of N. We use state-of-the-art multicore optical-fiber technology to experimentally demonstrate the quantum N-switch with N = 4 gates acting on a photonic-polarization qubit. This is the first observation of a quantum superposition of more than N = 2 temporal orders, demonstrating its usefulness for efficient phase estimation. | |
| dc.language | en | |
| dc.publisher | American Physical Society | |
| dc.source | https://doi.org/10.1103/PRXQuantum.2.010320 | |
| dc.subject | Quantum computation | |
| dc.subject | Quantum information processing | |
| dc.title | Computational advantage from the quantum superposition of multiple temporal orders of photonic gates | |
| dc.type | Artículos de revistas | |
