QUANTUM DYNAMICS AND NONLINEAR DYNAMICS

 

 

PREVIOUS PROJECTS

Super-Bloch Oscillations

Bismuth Qubits in Silicon

AC-driven BECs

Double-Kicked Atoms

Quantum Chaotic Ratchets

Rydberg Molecules in Fields

Chaos and Tunnelling Diodes

Rydberg Atoms

 

PUBLICATIONS

publications


Other links

Quantum Dynamics Group

Theoretical Atomic Physics

Atomic Theory Group photo

Jobs and PhD studentships

How to contact/find us

 

We are investigating the behaviour of quantum systems which are promising candidates for the development of future quantum technologies, such as quantum computers and quantum sensors. These include the theoretical investigation of how quantum spins qubits interact with the surrounding environment which causes the qubit to lose its quantum coherence. Often the environment can be itself a collection of other quantum spins and decoherence by a quantum bath can be rather different from decoherence by classical noise. One example are hybrid spin electronic-nuclear qubits where we have shown theoretically that the coherence times can vary by orders of magnitude at certain optimal working points. We are part of the UCL quantum information group and collaborate with experimental groups at the London Centre for Nanotechnology. We are also investigating the theory of optomechanical cooling of small mechanical resonators into the quantum ground state, in particular of small silica spheres and nanodiamonds levitated in optical fields. This project is a collaboration with the optomechanics group currently implementing experimental realisations of levitated systems .
In the past we have investigated the quantum behaviour of systems with a chaotic limit or quantum systems with a component of nonlinear dynamics. See below for some of our previous work in these areas.


There are potential Phd opportunities in the following areas:

(1) Optomechanics: towards sensing at the quantum limit

(2) Quantum spin dynamics: suppressing decoherence by quantum spin baths


There is also a 12 month post-doctoral or visitor position currently open in either of these two areas
We welcome enquiries from prospective PhD students or other researchers and visitors.
For further information contact Prof. T S Monteiro: TEL.+44 (020)7679 3504 t.monteiro@ucl.ac.uk

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Classical vs Quantum phase space (Wigner functions) of atomic electron in a strong magnetic field: (a)chaotic(b)mixed(c)regular

 

Resonant
Bifurcations of electronic orbits in the RTD.

Tunnelling Diodes

Rydberg Atoms in
Atoms in external fields
external fields

Rydberg Molecules in
Wavefunctions
of H2 in a
magnetic fields