Publications

2023

1. Self-Testing with Dishonest Parties and Device-Independent Entanglement Certification in Quantum Communication Networks

   Gláucia Murta, and Flavio Baccari

   Phys. Rev. Lett., Oct 2023
2. Continuity of robustness measures in quantum resource theories

   Jonathan Schluck, Gláucia Murta, Hermann Kampermann, and 2 more authors

   Journal of Physics A: Mathematical and Theoretical, Jun 2023
3. Overcoming Fundamental Bounds on Quantum Conference Key Agreement

   Giacomo Carrara, Gláucia Murta, and Federico Grasselli

   Phys. Rev. Appl., Jun 2023
4. Boosting device-independent cryptography with tripartite nonlocality

   Federico Grasselli, Gláucia Murta, Hermann Kampermann, and 1 more author

   Quantum, Apr 2023

2022

1. Secure Anonymous Conferencing in Quantum Networks

   Federico Grasselli, Gláucia Murta, Jarn Jong, and 4 more authors

   PRX Quantum, Oct 2022

2021

1. Quantum Key Distribution Overcoming Extreme Noise: Simultaneous Subspace Coding Using High-Dimensional Entanglement

   Mirdit Doda, Marcus Huber, Gláucia Murta, and 3 more authors

   Phys. Rev. Appl., Mar 2021
2. Entropy Bounds for Multiparty Device-Independent Cryptography

   Federico Grasselli, Gláucia Murta, Hermann Kampermann, and 1 more author

   PRX Quantum, Jan 2021
3. Genuine multipartite entanglement is not a precondition for secure conference key agreement

   Giacomo Carrara, Hermann Kampermann, Dagmar Bruß, and 1 more author

   Phys. Rev. Res., Mar 2021

2020

1. Quantum Conference Key Agreement: A Review

   Gláucia Murta, Federico Grasselli, Hermann Kampermann, and 1 more author

   Advanced Quantum Technologies, Mar 2020

   Abs

   Abstract Conference key agreement (CKA), or multipartite key distribution, is a cryptographic task where more than two parties wish to establish a common secret key. A composition of bipartite quantum key distribution protocols can accomplish this task. However, the existence of multipartite quantum correlations allows for new and potentially more efficient protocols, to be applied in future quantum networks. Here, the existing quantum CKA protocols based on multipartite entanglement are reviewed, both in the device-dependent and the device-independent scenario.

2. Key rates for quantum key distribution protocols with asymmetric noise

   Gláucia Murta, Filip ę\fidek, Jérémy Ribeiro, and 2 more authors

   Phys. Rev. A, Jun 2020
3. Verifiable hybrid secret sharing with few qubits

   Victoria Lipinska, Gláucia Murta, Jérémy Ribeiro, and 1 more author

   Phys. Rev. A, Mar 2020

2019

1. Towards a realization of device-independent quantum key distribution

   G Murta, S B Dam, J Ribeiro, and 2 more authors

   Quantum Science and Technology, Jul 2019

   Abs

   In the implementation of device-independent (DI) quantum key distribution (QKD) we are interested in maximizing the key rate, i.e. the number of key bits that can be obtained per signal, for a fixed security parameter. In the finite size regime, we furthermore also care about the minimum number of signals required before key can be obtained at all. Here, we perform a fully finite size analysis of device independent protocols using the CHSH inequality both for collective and coherent attacks. For coherent attacks, we sharpen the results recently derived in Arnon-Friedman et al (2018 Nat. Commun. 9 459), to reduce the minimum number of signals before key can be obtained. In the regime of collective attacks, where the devices are restricted to have no memory, we employ two different techniques that exploit this restriction to further reduce the number of signals. We then discuss experimental platforms in which DIQKD may be implemented. We analyse Bell violations and expected QBER achieved in previous Bell tests with distant setups and situate these parameters in the security analysis. Moreover, focusing on one of the experimental platforms, namely nitrogen-vacancy based systems, we describe experimental improvements that can lead to a DI QKD implementation in the near future.

2018

1. Fully device-independent conference key agreement

   Jérémy Ribeiro, Gláucia Murta, and Stephanie Wehner

   Phys. Rev. A, Feb 2018
2. Anonymous transmission in a noisy quantum network using the W state

   Victoria Lipinska, Gláucia Murta, and Stephanie Wehner

   Phys. Rev. A, Nov 2018

2017

1. Genuine-multipartite entanglement criteria based on positive maps

   Fabien Clivaz, Marcus Huber, Ludovico Lami, and 1 more author

   Journal of Mathematical Physics, Nov 2017
2. Tightness of correlation inequalities with no quantum violation

   Ravishankar Ramanathan, Marco Túlio Quintino, Ana Belén Sainz, and 2 more authors

   Phys. Rev. A, Jan 2017

2016

1. Generalized xor games with d outcomes and the task of nonlocal computation

   Ravishankar Ramanathan, Remigiusz Augusiak, and Gláucia Murta

   Phys. Rev. A, Feb 2016
2. Quantum bounds on multiplayer linear games and device-independent witness of genuine tripartite entanglement

   Gláucia Murta, Ravishankar Ramanathan, Natália Móller, and 1 more author

   Phys. Rev. A, Feb 2016

2015

1. Bounds on quantum nonlocality via partial transposition

   Karol Horodecki, and Gláucia Murta

   Phys. Rev. A, Jul 2015

2014

1. Characterizing the Performance of xor Games and the Shannon Capacity of Graphs

   Ravishankar Ramanathan, Alastair Kay, Gláucia Murta, and 1 more author

   Phys. Rev. Lett., Dec 2014