Universitat Wien

Singapore University of Technology and Design

University of Vienna

Universitat Rostock

Philip Walther

Jonas Zeuner

Tiago Barbin Batalhao

Joseph Fitzsimons

Marie-Christine Röhsner

Joshua Alexander Kettlewell

Alexander Szameit

Amir Moqanaki

Francesco Massa

Matthias Heinrich

Lukas Maczewsky

Method and system for executing a one-time program comprising at least one instruction operating on at least one input value (a, b) and returning at least one output value (O), wherein each instruction of the one-time program is encoded onto a state of an elementary quantum system, comprising: encoding the at least one input value (a, b) onto a quantum gate according to a pre-defined input-encoding scheme; applying the quantum gate to the at least one elementary quantum system; making a measurement of a resulting state of the at least one elementary quantum system after the quantum gate; and determining the at least one output value from a result of the measurement.

Secure probabilistic one-time program by quantum state distribution

An apparatus for generating narrow-band single and multi-photon state with long coherence length is disclosed. The apparatus comprises a laser pump () producing laser light, a non-linear optical crystal () within an optical cavity (), wherein the optical cavity () comprises at least two mirrors (); and a tuning crystal () situated between the non-linear optical crystal () and a first one () of the at least two mirrors.

Apparatus for generating narrow-band single-photon and multi-photon states with long coherence length

Growing community of inventors

Maria Enzersdorf, Austria

Philip Walther