63 citations · 290 across the 14 of their papers we have counts for
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Lecture notes on quantum computing
Anton Frisk Kockum, Ariadna Soro, Laura García-Álvarez +4
These are the lecture notes of the master's course "Quantum Computing", taught at Chalmers University of Technology every fall since 2020, with participation of students from RWTH…
Building trust for continuous variable quantum states
Ulysse Chabaud, Tom Douce, Frédéric Grosshans +2
In this work we develop new methods for the characterisation of continuous variable quantum states using heterodyne measurement in both the trusted and untrusted settings. First, b…
Continuous-variable nonlocality and contextuality
Rui Soares Barbosa, Tom Douce, Pierre-Emmanuel Emeriau +2
Contextuality is a non-classical behaviour that can be exhibited by quantum systems. It is increasingly studied for its relationship to quantum-over-classical advantages in informa…
Probabilistic Fault-Tolerant Universal Quantum Computation and Sampling Problems in Continuous Variables
Tom Douce, Damian Markham, Elham Kashefi +2
Continuous-Variable (CV) devices are a promising platform for demonstrating large-scale quantum information protocols. In this framework, we define a general quantum computational…
Continuous-Variable Sampling from Photon-Added or Photon-Subtracted Squeezed States
Ulysse Chabaud, Tom Douce, Damian Markham +3
We introduce a new family of quantum circuits in Continuous Variables and we show that, relying on the widely accepted conjecture that the polynomial hierarchy of complexity classe…
Continuous-Variable Instantaneous Quantum Computing is hard to sample
T. Douce, D. Markham, E. Kashefi +5
Instantaneous quantum computing is a sub-universal quantum complexity class, whose circuits have proven to be hard to simulate classically in the Discrete-Variable (DV) realm. We e…
Coupling a single Nitrogen-Vacancy center to a superconducting flux qubit in the far off resonance regime
Tom Douce, Michael Stern, Nicim Zagury +2
We present a theoretical proposal to couple a single Nitrogen-Vacancy (NV) center to a superconducting flux qubit (FQ) in the regime where both systems are off resonance. The coupl…
Toolbox for continuous variable entanglement production and measurement using spontaneous parametric down conversion
Guillaume Boucher, Tom Douce, David Bresteau +5
We provide a toolbox for continuous variables quantum state engineering and characterization of biphoton states produced by spontaneous parametric down conversion in a transverse p…
Parity-dependent State Engineering and Tomography in the ultrastrong coupling regime
S. Felicetti, T. Douce, G. Romero +2
Reaching the strong coupling regime of light-matter interaction has led to an impressive development in fundamental quantum physics and applications to quantum information processi…
Quantum search with modular variables
A. Ketterer, T. Douce, A. Keller +2
We give a dimension independent formulation of the quantum search algorithm introduced in [L. K. Grover, Phys. Rev. Lett. {\bf 79}, 325 (1997)]. This algorithm provides a quadratic…
Quantum search with non--orthogonal entangled states
T. Douce, A. Ketterer, A. Keller +2
We propose a classical to quantum information encoding system using non--orthogonal states and apply it to the problem of searching an element in a quantum list. We show that the p…
Direct measurement of the biphoton Wigner function through two-photon interference
Tom Douce, Andreas Eckstein, Stephen P. Walborn +5
The Hong-Ou-Mandel (HOM) experiment was a benchmark in quantum optics, evidencing the quantum nature of the photon. In order to go deeper, and obtain the complete information about…