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Measurement-based dynamic control of mesoscopic many-body systems

Total Cost €


EC-Contrib. €






 MECTRL project word cloud

Explore the words cloud of the MECTRL project. It provides you a very rough idea of what is the project "MECTRL" about.

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Project "MECTRL" data sheet

The following table provides information about the project.


Organization address
city: AARHUS C
postcode: 8000

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Denmark [DK]
 Total cost 1˙499˙406 €
 EC max contribution 1˙499˙406 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-STG
 Funding Scheme ERC-STG
 Starting year 2015
 Duration (year-month-day) from 2015-05-01   to  2020-04-30


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    AARHUS UNIVERSITET DK (AARHUS C) coordinator 1˙499˙406.00


 Project objective

Quantum control is an ambitious framework for steering dynamics from initial states to arbitrary desired final states. It has over the past decade been used extensively with immense success for control of low- dimensional systems in as varied fields as molecular dynamics and quantum computation. Only recently have efforts been initiated to extend this to higher-dimensional many-body systems. Most generic quantum control schemes to date, however, put quite heavy requirements on the controllability of either the system Hamiltonian or a set of measurement operators. This will in many realistic scenarios prohibit an efficient realization.

Within this proposal, I will develop a new quantum control scheme, which is minimalistic on system requirements and therefore ideally suited for the efficient and reliable optimization of many-body control problems. The fundamentally new ingredient is the total quantum evolution dictated by a combination of fixed many-body time evolution and the precise knowledge of the quantum back-action due to repeated quantum non-destruction (QND) measurements of a single projection operator. The main focus of this proposal is theoretical and experimental quantum engineering of the dynamics in systems, which are sufficiently small to calculate the measurement back-action exactly and sufficiently large to have interesting many-body properties. Recent experimental advances in single site manipulation of bosons in optical lattices have enabled the high fidelity preparation exactly such mesoscopic samples of atoms (5-50). This forms an ideal starting point for many-body quantum control, and we will i.a. demonstrate engineering of quantum phase transitions and preparation of highly non-classical Schödinger cat states.

Finally, using the results from an online graphical interface allowing users of the internet to solve quantum problems we will attempt to build next-generation optimization computer algorithms with a higher level of cognition built in.


year authors and title journal last update
List of publications.
2016 M Moreno-Cardoner, J F Sherson, G De Chiara
Non-Gaussian distribution of collective operators in quantum spin chains
published pages: 103015, ISSN: 1367-2630, DOI: 10.1088/1367-2630/18/10/103015
New Journal of Physics 18/10 2019-05-29
2017 M A Kristensen, M Gajdacz, P L Pedersen, C Klempt, J F Sherson, J J Arlt, A J Hilliard
Sub-atom shot noise Faraday imaging of ultracold atom clouds
published pages: 34004, ISSN: 0953-4075, DOI: 10.1088/1361-6455/50/3/034004
Journal of Physics B: Atomic, Molecular and Optical Physics 50/3 2019-05-29
2016 Brendan Reid, Maria Moreno-Cardoner, Jacob Sherson, Gabriele De Chiara
Manipulating matter waves in an optical superlattice
published pages: , ISSN: 2469-9926, DOI: 10.1103/physreva.94.063629
Physical Review A 94/6 2019-05-29
2016 Jens Jakob W. H. Sørensen, Mads Kock Pedersen, Michael Munch, Pinja Haikka, Jesper Halkjær Jensen, Tilo Planke, Morten Ginnerup Andreasen, Miroslav Gajdacz, Klaus Mølmer, Andreas Lieberoth, Jacob F. Sherson
Exploring the quantum speed limit with computer games
published pages: 210-213, ISSN: 0028-0836, DOI: 10.1038/nature17620
Nature 532/7598 2019-05-24
2016 M. Gajdacz, A. J. Hilliard, M. A. Kristensen, P. L. Pedersen, C. Klempt, J. J. Arlt, J. F. Sherson
Preparation of Ultracold Atom Clouds at the Shot Noise Level
published pages: , ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.117.073604
Physical Review Letters 117/7 2019-05-24

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