73 citations · 150 across the 9 of their papers we have counts for
9 papers
Information geometry of quantum critical submanifolds: relevant, marginal and irrelevant operators
Bruno Mera, Nikola Paunković, Syed Tahir Amin +1
We analyze the thermodynamical limit of the quantum metric along critical submanifolds of theory space. Building upon various results previously known in the literature, we relate…
Interferometric geometry from symmetry-broken Uhlmann gauge group with applications to topological phase transitions
Hector Silva, Bruno Mera, Nikola Paunković
We provide a natural generalization of a Riemannian structure, i.e., a metric, recently introduced by Sjöqvist for the space of non degenerate density matrices, to the degenerate c…
Dynamical phase transitions at finite temperature from fidelity and interferometric Loschmidt echo induced metrics
Bruno Mera, Chrysoula Vlachou, Nikola Paunković +2
We study finite-temperature Dynamical Quantum Phase Transitions (DQPTs) by means of the fidelity and the interferometric Loschmidt Echo (LE) induced metrics. We analyse the associa…
Quantum contract signing with entangled pairs
P. Yadav, P. Mateus, N. Paunković +1
We present a quantum scheme for signing contracts between two clients (Alice and Bob) using entangled states and the services of a third trusted party (Trent). The trusted party is…
Quantum key distribution by phase flipping of coherent states of light
G. A. Barbosa, J. van de Graaf, P. Mateus +1
In this paper we present quantum key distribution protocol that, instead of single qubits, uses mesoscopic coherent states of light to encode bit values of a randomly g…
Boltzmann-Gibbs states in topological quantum walks and associated many-body systems: Fidelity and Uhlmann parallel transport analysis of Phase Transitions
Bruno Mera, Chrysoula Vlachou, Nikola Paunković +1
We perform the fidelity analysis for Boltzmann-Gibbs-like states in order to investigate whether the topological order of 1D fermionic systems at zero temperature is maintained at…
Gravity-Matter Entanglement in Regge Quantum Gravity
Nikola Paunković, Marko Vojinović
We argue that Hartle-Hawking states in the Regge quantum gravity model generically contain non-trivial entanglement between gravity and matter fields. Generic impossibility to talk…
Noise and measurement errors in a practical two-state quantum bit commitment protocol
Ricardo Loura, Álvaro J. Almeida, Paulo S. André +3
We present a two-state practical quantum bit commitment protocol, the security of which is based on the current technological limitations, namely the nonexistence of either stable…
Secure -dimensional Simultaneous Dense Coding and Applications
Haozhen Situ, Daowen Qiu, Paulo Mateus +1
Simultaneous dense coding guarantees that Bob and Charlie simultaneously receive their respective information from Alice in their respective processes of dense coding. The idea is…