The intriguing genuinely quantum phenomena of quantum entanglement and quantum coherence are the basis of the advantages witnessed in quantum technologies. We investigate their paramount role in the phenomena of superadditivity and superactivation of quantum channel capacities. Importantly, we investigate how their hidden manifestation in the indefinite causal order framework could be harnessed to generate entanglement in quantum networks in a distributed manner. This lays the ground to new ways of looking at future networks in their full quantum nature, and better understanding their potential to achieve unprecedented practical levels.

Distributed quantum computing is one of the most appealing applications in the panorama of Quantum Technologies. In fact, distributed architectures could be our bridge to step beyond the current NISQ era. This is why we work to achieve large-scale integration of quantum technologies. By inter-connecting spatially distributed quantum processors, we would achieve a scalable architecture resistant to noise. Our roadmap towards a distributed quantum computing ecosystem is outlined in the figure on the left. Each layer from the above picture is of crucial importance to be able to perform quantum algorithm over a distributed architecture. We detail this here.

The design of complex systems – such as communication networks – is commonly simplified through an abstract model, which enables the characterization and standardization of the different functionalities by abstracting from the particulars of the underlying technologies. When it comes to the Quantum Internet a standard model is missing. Moreover, the peculiarities of quantum phenomena impose a major paradigm shift and prohibit a one-to-one mapping between classical Internet protocol stack and the Quantum Internet services. Indeed, the key resource for quantum communications, i.e., the phenomenon of quantum entanglement, revolutionizes the very concept of communication network. Specifically, entanglement gives birth to a wider concept of connectivity that affects the entire protocol stack functionalities impose new challenges for the network design. For an in depth discussion click here .

Our milestones towards the *Quantum Internet*.

September 19^{th} 2017

Marcello Caleffi gave the tutorial **Toward Practical Quantum Communications** at *International Tyrrhenian Workshop on Digital Communication* in Palermo (Italy).

October 23^{th} 2017

info Caleffi gave the talk **Toward a Quantum Internet** within the "New Systems and Objects" Panel at *Visions for Future Communications Summit* in Lisbon (Portugal).

December 4^{th} 2017

Marcello Caleffi gave the IEEE Computer Society Distinguished Visitor talk **2020: Toward Distributed Quantum Computing** at *Singapore Polytechnic* in Singapore.

December 8^{th} 2017

Marcello Caleffi gave the IEEE Computer Society Distinguished Visitor talk **2020: Toward Distributed Quantum Computing** at *Institute of Information Science, Academia Sinica* in Taipei (Taiwan)

January 12^{th} 2018

Angela Sara Cacciapuoti and Marcello Caleffi gave the tutorial **2020: Toward Practical Quantum Networks** at *IEEE CCNC 2018: the IEEE Consumer Communications & Networking Conference* in Las Vegas (USA).

January 16^{th} 2018

Marcello Caleffi gave the tutorial **Network Design for Distributed Quantum Computing** at *Italian Networking Workshop 2018* in Courmayeur (Italy).

March 6^{th} 2018

Marcello Caleffi gave the talk **Network Design for Distributed Quantum Computing** at *CNR IREA* in Naples (Italy).

May 20^{th} 2018

Angela Sara Cacciapuoti and Marcello Caleffi gave the tutorial **Network Design for Distributed Quantum Computing** at *IEEE ICCC 2018: the IEEE International Conference on Communications* in Kansas City (USA).

June 26^{th} 2018

Marcello Caleffi gave the talk **Quantum Internet: from Communication to Distributed Computing!** at the annual meeting of *Telecommunications and Information Technologies National Group (GTTI)* in Bari (Italy).

Sep. 6^{th} 2018

Our invited paper **Quantum Internet: from Communication to Distributed Computing!** at *ACM/IEEE NanoCom 2018: the International Conference on Nanoscale Computing and Communication* is available **here**.

November 26^{th} 2018

Marcello Caleffi gave the IEEE Computer Society Distinguished Visitor talk **Quantum Internet** at *Riga Technical University* in Riga (Latvia).

November 27^{th} 2018

Marcello Caleffi gave the IEEE Computer Society Distinguished Visitor talk **2020: Toward Practical Quantum Computing** at *TalTech: Tallinn University of Technology* in Tallinn (Estonia).

December 18^{th} 2018

Angela Sara Cacciapuoti gave the talk **Towards the Quantum Internet: a multidisciplinary efort** at *Cineca* in Bologna (Italy).

March 12^{th} 2019

Marcello Caleffi gave the keynote **The Quantum Internet: Understanting and Leveraging Quantum Networks for the Defense Domain** for *Optronics Captech, European Defense Agency (EDA)* in Toulose (France).

April 5^{th} 2019

Our invited paper **Toward the Quantum Internet: a Directional-Dependent Noise Model for Quantum Signal Processing!** at *IEEE ICASSP 2019: the IEEE International Conference on Acoustics, Speech and Signal Processing* is available **here**.

May 13^{th} 2019

Angela Sara Cacciapuoti and Marcello Caleffi will give the tutorial **Quantum Communications: Signal Processing meets Entanglement** at *IEEE ICASSP 2019: the IEEE International Conference on Acoustics, Speech and Signal Processing* in Brighton (UK).

May 20^{th} 2019

Angela Sara Cacciapuoti and Marcello Caleffi will give the tutorial **Quantum Internet: Wiring the Weirdness** at *IEEE ICCC 2019: the IEEE International Conference on Communications* in Shanghai (China).

November 18^{th} 2019

Telespazio’s CEO, **Luigi Pasquali**, awarded the Voyager prize to the proposal "*The Quantum Switch: enabling Noiseless Quantum communications for CyberSecurity Applications*", developed by a team from the University of Naples *Federico II* made up by **Angela Sara Cacciapuoti**, **Marcello Caleffi**, **Vincenzo D'Ambrosio** and **Carlo Forestiere**.

Further info**here**

Further info

December 5^{th} 2019

Angela Sara Cacciapuoti gave the talk **Beyond 5G: the Quantum Internet** at *5G Italy 2019* in Roma (Italy).

December 19^{th} 2019

Marcello Caleffi gave the talk **Quantum Trajectories for the Quantum Internet: Noiseless Communications through Noisy Channels** at Cineca 2nd workshop on *"Quantum Computing and High Performance Computing"* in Bologna (Italy).

May 4^{th} 2020

Angela Sara Cacciapuoti, Marcello Caleffi and Lajos Hanzo will give the tutorial **Quantum Signal Processing & Communications – a Glimpse beyond Moore’s Law** at *IEEE ICASSP 2020: the IEEE International Conference on Acoustics, Speech and Signal Processing* in Barcellona (Spain).

June 7^{th} 2020

Angela Sara Cacciapuoti, Marcello Caleffi and Lajos Hanzo will give the tutorial **Quantum Communications a A Glimpse Beyond Moore's Law** at *IEEE ICCC 2020: the IEEE International Conference on Communications* in Dublin (Ireland).

December 2^{th} 2020

Marcello Caleffi will give the talk **Quantum Internet** at *5G Italy 2020*.

December 11^{th} 2020

Angela Sara Cacciapuoti, Marcello Caleffi, Anthony Soong and Lajos Hanzo will give the tutorial **Quantum Communications - A Glimpse Beyond Moore's Law** at *IEEE GLOBECOM 2020*.

October 22^{th} 2021

Marcello Caleffi gave the talk **The Quantum Internet: A Communication Engineering Perspective** at *IEEE QCE 2021*.

December 3^{th} 2021

Angela Sara Cacciapuoti, Federico Mattei and Antonio Manzalini will give the talk **Quantum Internet** at *5g Italy 2021*.

December 8^{th} 2021

Angela Sara Cacciapuoti will give the talk **Quantum Internet: from classical to quantum path** at *Quantum Innovation 2021*.

December 9^{th} 2021

Angela Sara Cacciapuoti and Michele Grossi gave the talk **Towards Quantum Distributed Computing** at *IEEE GLOBECOM 2021*.

December 10^{th} 2021

Angela Sara Cacciapuoti received the international award **Stars in Computer Networking and Communications 2021** from *N2Women *.