## Search

Now showing items 1-10 of 49

#### Resource-Efficient High-Dimensional Entanglement Detection via Symmetric Projections

(2023-10-25)

We introduce two families of criteria for detecting and quantifying the entanglement of a bipartite quantum state of arbitrary local dimension. The first is based on measurements in mutually unbiased bases and the second ...

#### Time Dynamics in Quantum Field Theory Systems

(2022-12-23)

In this doctoral thesis, we develop and investigate new mathematical tools that are intended to allow for a rigorous description of non–perturbative quantum field theory (QFT) dynamics. Here, the term QFT is to be understood ...

#### Quantum-enhanced Doppler lidar

(2022-12-01)

We propose a quantum-enhanced lidar system to estimate a target’s radial velocity, which employs squeezed and frequency-entangled signal and idler beams. We compare its performance against a classical protocol using a ...

#### Bi-Frequency Illumination: A Quantum-Enhanced Protocol

(2022-11-01)

Quantum-enhanced, idler-free sensing protocol to measure the response of a target object to the frequency of a probe in a noisy and lossy scenario is proposed. In this protocol, a target with frequency-dependent reflectivity ...

#### Open-Air Microwave Entanglement Distribution for Quantum Teleportation

(2022-10-01)

Microwave technology plays a central role in current wireless communications, including mobile communication and local area networks. The microwave range shows relevant advantages with respect to other frequencies in ...

#### Approximating the quantum approximate optimization algorithm with digital-analog interactions

(2022-10-01)

The quantum approximate optimization algorithm was proposed as a heuristic method for solving combinatorial optimization problems on near-term quantum computers and may be among the first algorithms to perform useful ...

#### Hybrid quantum-classical heuristic for the bin packing problem

(2022-07-09)

Optimization problems is one of the most challenging applications of quantum computers, as well as one of the most relevants. As a consequence, it has attracted huge efforts to obtain a speedup over classical algorithms ...

#### Extended State Space for Describing Renormalized Fock Spaces in QFT

(2022-06-04)

In quantum field theory (QFT) models, it often seems natural to use, instead of wave functions from Fock space, wave functions that are not square-integrable and have prefactors involving divergent integrals (known as ...

#### Classical dynamics from self-consistency equations in quantum mechanics

(2022-05-09)

During the last three decades, P. Bóna has developed a non-linear generalization of quantum mechanics, based on symplectic structures for normal states and offering a general setting which is convenient to study the emergence ...

#### Implementing Bogoliubov Transformations Beyond the Shale-Stinespring Condition

(2022-04-28)

We provide two extensions of a dense subspace of Fock space, such that Bogoliubov transformations become implementable on them, even though they violate the Shale-Stinespring condition, so they are not implementable on ...