@article { , title = {Temporal quantum correlations and Leggett-Garg inequalities in multilevel systems}, abstract = {We show that the quantum bound for temporal correlations in a Leggett-Garg test, analogous to the Tsirelson bound for spatial correlations in a Bell test, strongly depends on the number of levels N that can be accessed by the measurement apparatus via projective measurements. We provide exact bounds for small N that exceed the known bound for the Leggett-Garg inequality, and we show that in the limit N → ∞ the Leggett-Garg inequality can be violated up to its algebraic maximum.}, doi = {10.1103/PhysRevLett.113.050401}, eissn = {1079-7114}, issn = {0031-9007}, issue = {5}, journal = {Physical Review Letters}, publicationstatus = {Published}, publisher = {American Physical Society}, url = {https://hull-repository.worktribe.com/output/898483}, volume = {113}, keyword = {Specialist Research - Other}, year = {2014}, author = {Budroni, Costantino and Emary, Clive} }