Margarida Ribau Almeida

Margarida Almeida

Academic position:	PhD Student
Joining date:	01-10-2018
Roles in IT:	PhD Student
Thematic Line:	Optics and Photonics
Group:	Optical Quantum Communications – Av

Email: Send Email
Address: IT – Aveiro
Instituto de Telecomunicações
Campus Universitário de Santiago
P-3810-193 AVEIRO - PORTUGAL
Tel: +351 234 377 900

http://www.cienciavitae.pt/AA1E-A1EF-BE39

https://www.orcid.org/0000-0003-1812-5971

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25-02-2025

Best paper award at Photoptics 2025

The paper titled “Slice Reconciliation in Continuous-Variable Quantum Key Distribution using Discrete Modulation” from the authors Margarida Almeida, Armando N. Pinto and Nuno A. Silva was awarded best paper at 13th International Conference on Photonics, Optics and Laser Technology (Photoptics) in February 2025.

07-11-2024

Quantum Technology for Space Security: IT Leads NATO-Funded QSCAN Project

The QSCAN project will demonstrate the Secure Multiparty Computation (SMC) protocol for Space Surveillance Tracking within the Portuguese Quantum Communication Infrastructure.

15-10-2024

News@IT - Latest issue

In our latest newsletter, Issue 115, we are pleased to feature an exclusive interview with Carlos Salema, a distinguished scientist and one of the founding members of the Instituto de Telecomunicações.

30-08-2024

Margarida Almeida won two prestigious awards for her contributions in quantum communications research area

Margarida Almeida, a researcher in Quantum Communications and a PhD student in Electrical Engineering at the University of Aveiro, recently received two prestigious awards at the Research Summit Conference held at the University of Aveiro, Portugal.

23-05-2022

Best paper at II Workshop de Comunicação e Computação Quântica from XL SBRC

The paper entitled “CV-QKD Security Limits Using Higher-Order Probabilistic Shaped Regular M-APSK Constellations” from the authors Margarida Almeida, Daniel Pereira, Nelson J. Muga, Margarida Facão, Armando N. Pinto and Nuno A. Silva was awarded best paper at II Workshop de Comunicação e Computação Quântica (WQuantum) from XL Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos.

Scientific Achievements

Thesis Information

Real Time Implementation of a Continuous Variable Quantum Key Distribution System, Universidade de Aveiro, PhD Student, Margarida Ribau Almeida, Supervisor: N. A. Silva, Co-supervisor: A. N. Pinto, jul-2022 - set-2026

Academic Activities

1Supervision of BSc theses

As Co-supervisor

Continuous-variable quantum key distribution over channels with polarization drift, BSc Student, Beatriz Pereira Farias, Concluded 06-2024

Publications

8Papers in Journals

M. Almeida, A. N. Pinto, N. A. Silva, Robustness of continuous variable quantum key distribution under strong polarization drift, EPJ Quantum Technology, Vol. 12, No. 1, pp. -, October, 2025,
| Abstract | BibTex
M. Almeida, D. Pereira, A. N. Pinto, N. A. Silva, Classical channel bandwidth requirements in continuous variable quantum key distribution systems, IET Quantum Communication, Vol. 0, No. 0, pp. 1 - 11, July, 2024,
| Abstract | BibTex
D. Pereira, M. Almeida, A. N. Pinto, N. A. Silva, Impact of transmitter imbalances on the security of continuous variables quantum key distribution, EPJ Quantum Technology, Vol. 10, No. 1, pp. 1 - 13, June, 2023,
| Abstract | BibTex
M. Almeida, D. Pereira, M. Facão, A. N. Pinto, N. A. Silva, Reconciliation Efficiency Impact on Discrete Modulated CV-QKD Systems Key Rates, Journal of Lightwave Technology, Vol. 41, No. 19, pp. 6134 - 6141, May, 2023,
| Abstract | BibTex
D. Pereira, M. Almeida, M. Facão, A. N. Pinto, N. A. Silva, Probabilistic shaped 128-APSK CV-QKD transmission system over optical fibres, Optics Letters, Vol. 47, No. 15, pp. 3948 - 3948, July, 2022,
| Abstract | BibTex
M. Almeida, D. Pereira, N. J. Muga, M. Facão, A. N. Pinto, N. A. Silva, Secret key rate of multi-ring M-APSK continuous variable quantum key distribution, Optics Express, Vol. 29, No. 23, pp. 38669 - 38669, November, 2021,
| Abstract | Full text (PDF 2 MBs) | BibTex
D. Pereira, M. Almeida, M. Facão, A. N. Pinto, N. A. Silva, Impact of receiver imbalances on the security of continuous variables quantum key distribution, EPJ Quantum Technology, Vol. 8, No. 1, pp. 1 - 12, October, 2021,
| Abstract | BibTex
M. Almeida, D. Pereira, M. Facão, A. N. Pinto, N. A. Silva, Impact of imperfect homodyne detection on measurements of vacuum states shot noise, Optical and Quantum Electronics, Vol. 52, No. 503, pp. 1 - 13, November, 2020,
| Abstract | BibTex

15Papers in Conferences

M. Almeida, Í. G. Guilherme, A. N. Pinto, N. A. Silva, Quantifying the effect of polarization drift on continuous-variable QKD security, SPIE Photonics Europe, Strasbourg, France, Vol., pp. -, April, 2026,
| Abstract | BibTex
Í. G. Guilherme, M. Almeida, A. N. Pinto, N. A. Silva, Polarization Multiplexing CV-QKD with Polarization Drift Post-Compensation, SPIE Security + Defence, Madrid, Spain, Vol. 13676, pp. 1367608-1 - 1367608-11, September, 2025,
| Abstract | BibTex
M. Almeida, Í. G. Guilherme, A. N. Pinto, N. A. Silva, Polarization Multiplexing CV-QKD with Polarization Drift Pre-Compensation, International Conference of Transparent Optical Network (ICTON), Barcelona, Spain, Vol., pp. -, July, 2025,
| Abstract | BibTex
C. Bastos, F. Pinto, R. Bacar, G. Anjos, M. Almeida, A. N. Pinto, R. Chaves, T. Dias, J. Afonso, R. Calé, M. Freitas, L. Maia, L. Magalhães, A. Muñiz, R. Cantó, J. Brito, J. Ballesta, R. Méndez, S. Laschet, S. Ramacher, P. James, L. Torresetti, P. Piscione, A. Abdulwahed, P. Giardina, V. Martin, L. Ortiz, A. Pastor, N. J. Muga, N. A. Silva, DL Lopez, M. Vieira, DISCRETION: First field demonstration of a quantum enabled SDN in the context of a military exercise, International Conference on Military Communications and Information Systems ICMCIS ICMCIS, Oeiras, Portugal, Vol., pp. -, May, 2025,
| Abstract | BibTex
M. Almeida, A. N. Pinto, N. A. Silva, Slice Reconciliation in Continuous-Variable Quantum Key Distribution using Discrete Modulation, Photoptics, Porto, Portugal, Vol., pp. -, February, 2025,
| Abstract | BibTex
M. Almeida, A. N. Pinto, N. A. Silva, Polarization Drift Impact on the Performance of CV-QKD, Conf. on Quantum Cryptography - QCRYPT, Vigo, Spain, September, 2024 | BibTex
N. A. Silva, M. Almeida, N. J. Muga, A. N. Pinto, Impact of Limited Classical Channel Bandwidth on the Secret Key Rate of a CV-QKD system, International Conf. on Transparent Networks – ICTON, Bari, Italy, Vol., pp. -, July, 2024,
| Abstract | BibTex
M. Almeida, G. Anjos, J. Martins, A. N. Pinto, N. A. Silva, An FPGA-based Physical Layer for a CV-QKD System, International Conf. on Applications of Optics and Photonics - AOP, Aveiro, Portugal, Vol., pp. -, July, 2024 | BibTex
M. Almeida, A. N. Pinto, N. A. Silva, Modulation variance optimization in discrete modulated CV-QKD systems, SPIE Sensors + Imaging, Amsterdam, Netherlands, Vol., pp. -, September, 2023,
| Abstract | BibTex
G. Anjos, M. Almeida, J. Martins, N. A. Silva, N. J. Muga, A. N. Pinto, An FPGA-based physical layer approach for a CV-QKD transmitter, International Conference of Transparent Optical Network (ICTON), Bucharest, Romania, Vol., pp. -, July, 2023,
| Abstract | BibTex
D. Pereira, N. A. Silva, M. Almeida, A. N. Pinto, Optimization of continuous variables quantum key distribution using discrete modulation, SPIE Sensors + Imaging, Berlin, Germany, September, 2022,
| Abstract | BibTex
M. Almeida, A. N. Pinto, N. A. Silva, CV-QKD Imperfections Impact on Shot-Noise Measurement, Iberic Meeting of Optics Students IMOS, Aveiro, Portugal, Vol., pp. -, June, 2022,
| Abstract | BibTex
M. Almeida, D. Pereira, N. J. Muga, M. Facão, A. N. Pinto, N. A. Silva, CV-QKD Security Limits Using Higher-Order Probabilistic Shaped Regular M-APSK Constellations, SBRC Workshop de Comunicação e Computação Quântica WQuantum, Fortaleza, Brazil, Vol., pp. -, May, 2022,
| Abstract | BibTex
M. Almeida, M. Facão, N. J. Muga, A. N. Pinto, N. A. Silva, Secret key extraction in direct reconciliation CV-QKD systems, Telecoms Conference ConfTELE, Leiria, Portugal, Vol., pp. -, February, 2021 | BibTex
N. A. Silva, M. Almeida, D. Pereira, M. Facão, N. J. Muga, A. N. Pinto, Role of Device Imperfections on the Practical Performance of Continuous-Variable Quantum Key Distribution Systems, International Conf. on Transparent Networks – ICTON, Angers, France, Vol. We.D5.3, pp. -, July, 2019,
| Abstract | BibTex

1Non-refereed Publications

N. A. Silva, M. J. Ferreira, S. T. Mantey, M. Almeida, G. Anjos, N. J. Muga, A. N. Pinto, Tecnologias Quânticas em Criptografia, PTDC/EEI-TEL/8017/2020, May 2025,
| Abstract | Full text (PDF 225 KBs) | Other Resources

Projects

Currently running projects2

Acronym	Name	Funding Agency	Start date	Ending date
QSCAN	Quantum-Enabled Secure Multiparty Computation for Space Surveillance Tracking	NATO	01-03-2024	28-02-2027
QuantaGenomics	Quantum Enabled Secure Multiparty Computation for Genomic Medicine	EU / FCT / Programme ERA-NET Cofund QuantERA II	01-05-2022	30-04-2026

Closed Projects3

Acronym	Name	Funding Agency	Start date	Ending date
DISCRETION	Disruptive SDN secure communications for European Defence	EU	01-12-2021	31-05-2025
PTQCI	Portuguese Quantum Communications Infrastructure - PTQCI	EU	01-01-2023	30-06-2025
Q.DOT	SI I&DT Copromoção Nr. 039728 - Distributed Quantum Oblivious Transfer	P2020	01-10-2019	30-06-2022

Other Scientific Achievements

6Awards

Í. G. Guilherme, M. Almeida, A. N. Pinto, N. A. Silva, Best Paper Award, Best paper award for the paper entitled "Polarization Multiplexing CV-QKD with Polarization Drift Post-Compensation", presented at SPIE Security + Defence, held in Madrid, Spain, Sept. 2023, 01-09-2025
M. Almeida, A. N. Pinto, N. A. Silva, Best paper award at Photoptics 2025, Best paper award with the paper titled “Slice Reconciliation in Continuous-Variable Quantum Key Distribution using Discrete Modulation” received at at 13th International Conference on Photonics, Optics and Laser Technology (Photoptics) in February 2025., 01-02-2025
M. Almeida, A. N. Pinto, N. A. Silva, Best Communication Award, Best communication award with the work entitled "Optimization of CV-QKD Systems for Field Deployment" exploring the topic of PhD thesis, received in the Research Summit 2024, Aveiro, Portugal, July 2024, 01-07-2024
M. Almeida, A. N. Pinto, N. A. Silva, Best Communication Award, Best communication in Engineering award with the work entitled "Optimization of CV-QKD Systems for Field Deployment" exploring the topic of PhD thesis, received in the Research Summit 2024, Aveiro, Portugal, July 2024, 01-07-2024
M. Almeida, A. N. Pinto, N. A. Silva, Best Paper Award, Best paper award for the paper entitled "Modulation variance optimization in discrete modulated CV-QKD systems", presented at Emerging Imaging and Sensing Technologies for Security and Defense conference, part of SPIE Sensors + Imaging 2023 (Security + Defense), held in Amsterdam, Netherlands, Sept. 2023, 01-09-2023
M. Almeida, D. Pereira, N. J. Muga, M. Facão, A. N. Pinto, N. A. Silva, Best paper in Workshop, Best paper in the II Workshop de Comunicação e Computação Quântica with the paper entitled "CV-QKD Security Limits Using Higher-Order Probabilistic Shaped Regular M-APSK Constellations", received in the II Workshop de Comunicação e Computação Quântica (WQuantum) from XL Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos, 23 May, Uberlândia, Brazil, 2022, 01-05-2022

Related UN SDG

Activities from this researcher fall under the following United Nations Strategic Development Goals (SDGs):

IT Member Profile