**doing**

projects marked with

projects marked with

**M**are suitable for a MS thesis (laurea magistrale)projects marked with

**D**are suitable for a PhD thesis (dottorato)*******

soliton generation

soliton generation

- We are analyzing the possibility of reducing the intensity of the time-dependent magnetic field required in the soliton-generation scheme by extending the field action to a segment of finite, though small, length at the chain end. Aim of the analysis is to check whether the scheme can be experimentally implemented using fields of reasonably attainable intensity.

*******

magnetic environment as quantum transmission line

magnetic environment as quantum transmission line

- We are considering an approximation scheme where the chain, still assumed to transmit soliton-like signals, retains its quantum character, though in a large-S semiclassical limit. This allows us to understand if and how the interaction of the qubit with the spins of the chain does influence the dynamics of the chain itself, by what is usually called a quantum back-action.
- As the above approximation is preliminarily showing a significant back-action we are considering the possibility of obtaining an effective entanglement transfer between two qubits by connecting them to distant parts of the chain and then making them talk to each other by the properly quantum-renormalized soliton-like signal.

*******

coherent states and gravitational field

coherent states and gravitational field

- We are exploring the possible connections between quantum information theory and (quantum?) gravity. In particular, by using the parametric representation with environmental coherent states we are trying to understand which are the coherent states that describe the Einstein equations in the classical limit.

- After having formally defined the time after which a generic environment induces full decoherence in the principal system, we are studying how this time depends on the more or less pronounced quantum character of the environment, in order to devise strategies to make such time as long as possible.
**M**

- We are studying the role of global symmetries in the measuring apparatus with attention focused on the possibility that their, possibly spontaneous, breaking be related with the production of a well defined output and the consequent state reduction.
**M(?)&D** - We are considering possible physical realizations of models such as the spin-star we have used for describing the quantum measurement process, aiming at designing at least a gedanken experiment for testing the idea that the breaking of global symmetries in the measuring apparatus be the mechanism leading to the output production.
**M(?)&D**