135 citations · 269 across the 16 of their papers we have counts for
19 papers
Coherent consensus for the estimation and classification of phases
Roberto Ruiz, Alessandro Luongo, Sergi Ramos-Calderer +1
Inspired by quantum metrology, we propose a coherent consensus primitive to enhance the collaborative performance of independent quantum classifiers at the decision boundary. The b…
Quantum Contextuality and Entanglement-Free Grover Search in a Trapped-Ion Optical Qudit
Tarun Dutta, Jasper Phua Sing Cheng, Alex Jin +3
Quantum computational advantage is generally attributed to coherent interference and other non-classical resources, yet their respective roles remain difficult to disentangle in ex…
Scalable Determination of Penalization Weights for Constrained Optimizations on Approximate Solvers
Edoardo Alessandroni, Sergi Ramos-Calderer, Michel Krispin +7
Quadratic unconstrained binary optimization (QUBO) provides problem formulations for various computational problems that can be solved with dedicated QUBO solvers, based on classic…
Experimental Realization of the Markov Chain Monte Carlo Algorithm on a Quantum Computer
Baptiste Claudon, Sergi Ramos-Calderer, Jean-Philip Piquemal
Quantum algorithms present a quadratically improved complexity over classical ones for certain sampling tasks. For instance, the Quantum Amplitude Estimation (QAE) algorithm promis…
Quantum-Inspired Algorithms beyond Unitary Circuits: the Laplace Transform
Noufal Jaseem, Sergi Ramos-Calderer, Gauthameshwar S. +3
Quantum-inspired algorithms can deliver substantial speedups over classical state-of-the-art methods by executing quantum algorithms with tensor networks on conventional hardware.…
Fast quantum measurement tomography with optimal error bounds
Leonardo Zambrano, Sergi Ramos-Calderer, Richard Kueng
We present a two-step protocol for quantum measurement tomography that is light on classical co-processing cost and still achieves optimal sample complexity. Given measurement data…
Qibocal: an open-source framework for calibration of self-hosted quantum devices
Andrea Pasquale, Edoardo Pedicillo, Juan Cereijo +16
Calibration of quantum devices is fundamental to successfully deploy quantum algorithms on current available quantum hardware. We present Qibocal, an open-source software library t…
Quantum encoder for fixed Hamming-weight subspaces
Renato M. S. Farias, Thiago O. Maciel, Giancarlo Camilo +3
We present an exact -qubit computational-basis amplitude encoder of real- or complex-valued data vectors of components into a subspace of fixed Hamming weight $…
Efficient option pricing with unary-based photonic computing chip and generative adversarial learning
Hui Zhang, Lingxiao Wan, Sergi Ramos-Calderer +9
In the modern financial industry system, the structure of products has become more and more complex, and the bottleneck constraint of classical computing power has already restrict…
Qibolab: an open-source hybrid quantum operating system
Stavros Efthymiou, Alvaro Orgaz-Fuertes, Rodolfo Carobene +13
We present Qibolab, an open-source software library for quantum hardware control integrated with the Qibo quantum computing middleware framework. Qibolab provides the software laye…
Alleviating the quantum Big- problem
Edoardo Alessandroni, Sergi Ramos-Calderer, Ingo Roth +2
A major obstacle for quantum optimizers is the reformulation of constraints as a quadratic unconstrained binary optimization (QUBO). Current QUBO translators exaggerate the weight…
Towards an open-source framework to perform quantum calibration and characterization
Andrea Pasquale, Stavros Efthymiou, Sergi Ramos-Calderer +3
In this proceedings we present Qibocal, an open-source software package for calibration and characterization of quantum processing units (QPUs) based on the Qibo framework. Qibocal…
Efficient quantum interpolation of natural data
Sergi Ramos-Calderer
We present efficient methods to interpolate data with a quantum computer that complement uploading techniques and quantum post-processing. The quantum algorithms are supported by t…
An Optimized Quantum Implementation of ISD on Scalable Quantum Resources
Andre Esser, Sergi Ramos-Calderer, Emanuele Bellini +2
The security of code based constructions is usually assessed by Information Set Decoding (ISD) algorithms. In the quantum setting, amplitude amplification yields an asymptotic squa…
Solving systems of Boolean multivariate equations with quantum annealing
Sergi Ramos-Calderer, Carlos Bravo-Prieto, Ruge Lin +4
Polynomial systems over the binary field have important applications, especially in symmetric and asymmetric cryptanalysis, multivariate-based post-quantum cryptography, coding the…
Variational Quantum Eigensolver for SU() Fermions
Mirko Consiglio, Wayne J. Chetcuti, Carlos Bravo-Prieto +5
Variational quantum algorithms aim at harnessing the power of noisy intermediate-scale quantum computers, by using a classical optimizer to train a parameterized quantum circuit to…
Qibo: a framework for quantum simulation with hardware acceleration
Stavros Efthymiou, Sergi Ramos-Calderer, Carlos Bravo-Prieto +5
We present Qibo, a new open-source software for fast evaluation of quantum circuits and adiabatic evolution which takes full advantage of hardware accelerators. The growing interes…
Quantum Search for Scaled Hash Function Preimages
Sergi Ramos-Calderer, Emanuele Bellini, José I. Latorre +2
We present the implementation of Grover's algorithm in a quantum simulator to perform a quantum search for preimages of two scaled hash functions, whose design only uses modular ad…
Quantum unary approach to option pricing
Sergi Ramos-Calderer, Adrián Pérez-Salinas, Diego García-Martín +4
We present a quantum algorithm for European option pricing in finance, where the key idea is to work in the unary representation of the asset value. The algorithm needs novel circu…