Ricerc@Sapienza

In this project, our aim is to present a new platform, i.e. the so-called instrumental process, to generate and certify a form of strong randomness, which can be achieved through the intrinsically random nature of quantum physics.
We adopt a photonic platform to implement an instrumental process, equipped with active feed-forward of information and gain random bits from the measurement outputs of two parties (Alice and Bob), who share a bipartite entangled state.
The generation of random numbers constitutes a cardinal challenge for a plethora of fields, ranging from scientific numerical simulations, cryptography, to safeguarding privacy and gambling.
Indeed, the non-local correlations of entangled particles allow to gain string of numbers whose randomness can be certified with no assumptions about the internal working of the adopted device. With respect to the aforementioned seminal work in this direction and its newest developments, the instrumental scenario represents a most convenient choice, since it does not require any space-like separation between the parties. Besides the ease of implementation, the instrumental scenario enables to adopt only one input random seed for the generator, without suffering any locality loophole, therefore requiring less initial randomness. Moreover, this process ensures also a higher gain of random bits than the usual Bell scenario, since it gets only one trit as input to generate two output bits.