Quantum computation and quantum-state engineering driven by dissipation

Autor(en)

Frank Verstraete, Michael M. Wolf, J. Ignacio Cirac

Abstrakt

The strongest adversary in quantum information science is decoherence, which arises owing to the coupling of a system with its environment(1). The induced dissipation tends to destroy and wash out the interesting quantum effects that give rise to the power of quantum computation(2), cryptography(2) and simulation(3). Whereas such a statement is true for many forms of dissipation, we show here that dissipation can also have exactly the opposite effect: it can be a fully fledged resource for universal quantum computation without any coherent dynamics needed to complement it. The coupling to the environment drives the system to a steady state where the outcome of the computation is encoded. In a similar vein, we show that dissipation can be used to engineer a large variety of strongly correlated states in steady state, including all stabilizer codes, matrix product states(4), and their generalization to higher dimensions(5).

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Max-Planck-Institut für Quantenoptik

Journal

Nature Physics

Band

5

Seiten

633-636

Anzahl der Seiten

4

ISSN

1745-2473

DOI

https://doi.org/10.1038/NPHYS1342

Publikationsdatum

09-2009

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/0d14d008-83ea-4305-a4f2-d012e40170b8