Publications (4)
Entangling the whole by beam splitting a part
Callum Croal, Christian Peuntinger, Vanessa Chille +4
A beam splitter is a basic linear optical element appearing in many optics experiments and is frequently used as a continuous-variable entangler transforming a pair of input modes…
Quantumness of Gaussian Discord: Experimental Evidence and Role of System-Environment Correlations
Vanessa Chille, Niall Quinn, Christian Peuntinger +5
We provide experimental evidence of quantum features in bi-partite states classified as entirely classical according to a conventional criterion based on the Glauber P-function but…
Continuous-variable quantum digital signatures over insecure channels
Matthew Thornton, Hannah Scott, Callum Croal +1
Digital signatures ensure the integrity of a classical message and the authenticity of its sender. Despite their far-reaching use in modern communication, currently used signature…
Free-space quantum signatures using heterodyne detection
Callum Croal, Christian Peuntinger, Bettina Heim +6
Digital signatures guarantee the authorship of electronic communications. Currently used "classical" signature schemes rely on unproven computational assumptions for security, whil…