Bounding the quantum dimension with contextuality
2014 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 89, no 6Article in journal (Refereed) Published
We show that the phenomenon of quantum contextuality can be used to certify lower bounds on the dimension accessed by the measurement devices. To prove this, we derive bounds for different dimensions and scenarios of the simplest noncontextuality inequalities. Some of the resulting dimension witnesses work independently of the prepared quantum state. Our constructions are robust against noise and imperfections, and we show that a recent experiment can be viewed as an implementation of a state-independent quantum dimension witness.
Place, publisher, year, edition, pages
American Physical Society , 2014. Vol. 89, no 6
IdentifiersURN: urn:nbn:se:liu:diva-109183DOI: 10.1103/PhysRevA.89.062107ISI: 000338016100003OAI: oai:DiVA.org:liu-109183DiVA: diva2:737362