Scientific News (2016)1 January 2017|IQP SchnabelNegative Wigner function at telecommunication wavelengthPhoto: Ag SchnabelThe Wigner function is a quasi-probability density function that describes a quantum state. The word “quasi” refers to the fact that the Wigner...1 January 2016|IQP SchnabelAlternative to quantum memory?Photo: Ag SchnabelIn the past, multistep entanglement distillation without quantum memory only seemed possible in extremely inefficient form. With our work we show...