Description: Macintosh HD:Users:anazir1:Dropbox:MANQS.pdf     Welcome to the Manchester Noisy Quantum Systems Group (MaNQS)

 

       We work on the theory of open quantum systems, with an emphasis on developing new methods applicable beyond

       standard approximations.

       Applications range from solid-state quantum devices to biomolecular systems.

 

       Group Members  

      

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       Ahsan Nazir

       Contact Details

       Photon Science Institute and School of Physics & Astronomy, University of Manchester

       http://www.psi.manchester.ac.uk/

       http://www.physics.manchester.ac.uk/

      

 

 

                      Zach Blunden-Codd (PhD student)       Dave Newman (PhD student)      Henry Maguire (PhD student)

 

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                                                 CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 96
                                

       News

 

Job Opportunity: Research Associate - Theory of Open Quantum Systems: See https://www.jobs.manchester.ac.uk/displayjob.aspx?jobid=11012 for further particulars


In this EPSRC-funded position, you will specialise in developing the theory of the dynamics and thermodynamics of open quantum systems beyond weak-coupling regimes, with application to solid-state and molecular systems.

 

       New Group Member: Welcome to Henry Maguire who has joined the group as a PhD student.

 

       Congratulations to Jake on passing his PhD viva!

 

New Publication: Energy transfer in structured and unstructured environments: master equations beyond the Born-Markov approximations, Jake Iles-Smith, Arend G. Dijkstra, Neill Lambert and Ahsan Nazir, J. Chem. Phys. 144, 044110 (2016) We explore excitonic energy transfer dynamics in a molecular dimer system coupled to both structured and unstructured oscillator environments, using the reaction-coordinate formalism to go beyond weak and Markovian system-environment interactions.

 

New Publication: Vibronic resonances facilitate excited state coherence in light harvesting proteins at room temperature, Fabio Novelli, Ahsan Nazir, Gethin H. Richards, Ashkan Roozbeh, Krystyna E. Wilk, Paul M.G. Curmi, Jeffrey A. Davis, J. Phys. Chem. Lett. 6, 4573 (2015) – In this collaborative work with Jeff DavisÕ group in Swinburne, we identify coherent superpositions in photosynthetic light-harvesting complexes facilitated by strong vibronic mixing among excited states.

 

       New Group Member: Welcome to Dave Newman who has joined the group as a PhD student.

 

New Preprint: Quantum correlations of light and matter through environmental transitions, Jake Iles-Smith and Ahsan Nazir, arXIv:1412.6044 – Here we show that quantum light-matter correlations may be generated through interactions with a thermal environment in cavity QED systems.

 

New Publication: Dissipation enhanced vibrational sensing in an olfactory molecular switch, A. Checinska, F. A. Pollock, L. Heaney, A. Nazir, J. Chem. Phys. 142, 025102 (2015) – We demonstrate that dissipation can play a constructive role in facilitating sensitive and selective operation in molecular switch devices.

 

Congratulations to Jake on his first paper! Environmental dynamics, non-Gaussianity, and the emergence of noncanonical equilibrium states in open quantum systems, Jake Iles-Smith, Neill Lambert, Ahsan Nazir, Phys. Rev. A 90, 032114 (2014)

 

Experiment-theory collaboration leads to a new PRL: Temperature-dependent Mollow triplet spectra from a single quantum dot: Rabi frequency renormalisation and sideband linewidth insensitivity, Yu-Jia Wei, Yu He, Yu-Ming He, Chao-Yang Lu, Jian-Wei Pan, Christian Schneider, Martin Kamp, Sven Hšfling, Dara P. S. McCutcheon, Ahsan Nazir, Phys. Rev. Lett. 113, 097401 (2014)

 

       Recent Papers

 

         Dissipation enhanced vibrational sensing in an olfactory molecular switch,

         A. Checinska, F. A. Pollock, L. Heaney, A. Nazir, J. Chem. Phys. 142, 025102 (2015)

 

Environmental dynamics, non-Gaussianity, and the emergence of noncanonical equilibrium states in open quantum systems,

Jake Iles-Smith, Neill Lambert, Ahsan Nazir, Phys. Rev. A 90, 032114 (2014)

 

Temperature-dependent Mollow triplet spectra from a single quantum dot: Rabi frequency renormalisation and sideband linewidth insensitivity,

Yu-Jia Wei, Yu He, Yu-Ming He, Chao-Yang Lu, Jian-Wei Pan, Christian Schneider, Martin Kamp, Sven Hšfling, Dara P. S. McCutcheon, Ahsan Nazir, Phys. Rev. Lett. 113, 097401 (2014)

 

         A generalized multi-polaron expansion for the spin-boson model: Environmental entanglement and the biased two-state system

         S. Bera, A. Nazir, A. W. Chin, H. U. Baranger, S. Florens, Phys. Rev. B 90, 075110 (2014)

 

        Stabilizing spin coherence through environmental entanglement in strongly dissipative quantum systems

         S. Bera, S. Florens, H. U. Baranger, N. Roch, A. Nazir, A. W. Chin, Phys. Rev. B 89, 121108(R) (2014) (chosen as an EditorÕs Suggestion)

 

Model of the optical emission of a driven semiconductor quantum dot: Phonon-enhanced coherent scattering and off-resonant sideband narrowing,

D. P. S. McCutcheon and A. Nazir, Phys. Rev. Lett. 110, 217401 (2013)

        

A multi-site variational master equation approach to dissipative energy transfer,

F. A. Pollock, D. P. S. McCutcheon, B. W. Lovett, E. M. Gauger, and A. Nazir, New J. Phys. 15, 075018 (2013) (invited special issue article)

 

Tradeoff between Leakage and Dephasing Errors in the Fluxonium Qubit,

D. A. Herrera-Mart’, A. Nazir, and S. D. Barrett, Phys. Rev. B 88, 094512 (2013)

 

         Please see Google Scholar for a full list: http://scholar.google.co.uk/citations?user=IuYH1HcAAAAJ&hl=en

 

       Preprints

 

         Vibronic resonances facilitate excited state coherence in light harvesting proteins at room temperature,

         Fabio Novelli, Ahsan Nazir, Gethin H. Richards, Ashkan Roozbeh, Krystyna E. Wilk, Paul M.G. Curmi, Jeffrey A. Davis, arXIv:1503.00251

 

Quantum correlations of light and matter through environmental transitions,

Jake Iles-Smith and Ahsan Nazir, arXIv:1412.6044

 

         Full list of arXiv papers: http://arxiv.org/find/all/1/all:+AND+nazir+quantum/0/1/0/all/0/1