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Lunds universitet, Lunds Tekniska Högskola, Fysiska institutionen

Lunds universitet grundades 1666 och rankas återkommande som ett av världens 100 främsta lärosäten. Här finns 42 000 studenter och 7 400 medarbetare i Lund, Helsingborg och Malmö. Vi förenas i vår strävan att förstå, förklara och förbättra vår värld och människors villkor.

Lunds Tekniska Högskola, LTH, är en teknisk fakultet inom Lunds universitet med forskning av hög internationell klass och stora satsningar på pedagogisk mångfald.

Fysiska institutionen är en av Lunds universitets största institutioner med cirka 350 anställda. Vid institutionen finns sju forskningsavdelningar och ett antal större centrumbildningar. Forskningen vid institutionen täcker ett brett spektrum av modern fysik. www.fysik.lu.se.

Introduction
The Division of Atomic Physics at the Faculty of Engineering (LTH), Lund University, Sweden has a staff of over 50 researchers including guest researchers and graduate students. The research at the division is mainly based on the use of lasers, ranging from diode lasers to terawatt lasers at the High-Power Laser Facility. Some areas of research are: basic atomic physics including interactions between intense laser-fields and matter and VUV/XUV laser spectroscopy, quantum electronics, quantum optics and solid state spectroscopy, applied molecular spectroscopy, laser applications in medicine and biology, and industrial applications. More information can be found at http://www.atomic.physics.lu.se/.

This employment is linked to the Quantum Information Group at the Division of Atomic Physics. The group has a strong activity in quantum information and quantum optics based on light-matter interactions in inorganic crystals doped with rare earth ions. These materials have unique properties as solid state quantum materials due to their ability to remain in quantum superposition states over extended periods of time. The group has recently attracted considerable external funding for working with these materials. Current work is focused on the development of hardware for quantum computing and quantum memories and on developing materials where the speed of light can be slowed by 3-5 orders of magnitude for applications in e.g. laser frequency stabilization and medical imaging and treatment. The projects are challenging, technically and scientifically inspiring and constitute an excellent educational environment for graduate students and postdoctoral fellows.

Job assignment
The main task for the doctoral student will be to conduct research education which includes work with research but also completing graduate courses. The work duties can also include teaching and other departmental duties to a maximum of 20 %.

Research focus for this position
Depending on other recruitments and the interest of the applicant the research focus of this position could be in experimental quantum information or in quantum optics in combination with metrology or medical diagnostics as further outline below.

Research focus experimental quantum information
Development of quantum computing hardware explores a rich field of physics and requires detailed studies and understanding of coherent and reversible quantum systems. It requires the creation and control of increasingly complex quantum systems involving superposition and entangled states and characterizing and eliminating decoherence processes. Controlling and tailoring quantum systems, in addition to being necessary for quantum computing, is also important for meeting increasing technology demands of quantum control in the nanophysics and microelectronics areas.

One project in experimental quantum information is developing micro-cavities for controlled interactions between single photons and single atoms as a key element for future quantum technologies

Specific tasks for this project may involve:

  1. To build a micro-cavity with such high finesse and small mode volume that the vacuum light field modes are modified, leading to an enhancement of the spontaneous decay of atoms inside the cavity
  2. To use this enhancement effect (Purcell enhancement) to optically locate and interact with single rare-earth ions inside a crystal
  3. To use the interaction with single ions to control the cavity properties and to form qubit systems for quantum computing.

Another project in experimental quantum information is the control and detection of quantum mechanical states and development of quantum computing schemes for rare earth ion doped inorganic crystals

Specific tasks for this project may involve:

  1. Development of techniques to read out the state of single rare earth ions in inorganic crystals
  2. Developing high fidelity quantum gate operation on qubit states in rare earth doped crystals
  3. Investigating and developing scalable quantum computing schemes in rare earth ion-doped inorganic crystals

Research focus quantum optics and metrology
Time and frequency are the quantities that mankind can measure the most accurately. Improved frequency standards have far reaching consequences such as enabling more accurate determination of natural constants and more accurate tests of special and general relativity.

This project concerns the development of optical cavities for laser frequency stabilization using materials where the speed of light is reduced by 4-5 orders of magnitude compared to its speed in vacuum

Specific tasks for this project may involve:

  1. Using optical pumping in slow light materials to prepare narrow linewidth cavities and investigate how to best lock a laser to such cavities
  2. Slow light cavities reduce the effect of cavity length fluctuations due to the thermal motion of atoms at the cavity surface but effects of stray electric and magnetic fields, temperature and pressure on the slow light speed are yet unknown and need to be investigated
  3. Test the system against frequency stable international state of the art laser-systems

Research focus quantum optics and medical diagnostics
Optical imaging techniques have a molecular sensitivity not attainable with conventional medical imaging techniques. Optical techniques are however limited to shallow tissue depths due to the strong optical scattering that occurs in tissue. This project aims at strongly reducing the limitations on scattering by combining light with ultrasound and with high performance slow light filters which have the ability to only transmit light that has interacted with a locally focused ultrasound pulse in the tissue.

This project concerns optimizing and characterizing materials where the speed of light is reduced by 4-5 orders of magnitude for use in optical imaging and for developing techniques to focus laser beams deep inside the body.

Specific tasks for this project may involve:

  1. Characterizing and improving new slow light materials which can operate in the 700nm -1000nm low absorption window of human tissue
  2. Optimizing material performance by carrying out optical imaging experiments in human tissue phantoms
  3. Comparing the developed system with the performance of other medical imaging techniques like MRI and photo-acoustic tomography in cooperation with researchers in medicine and medical engineering

Entry requirements
A formal requirement for doctoral studies in physics is:

  • a university degree on advanced level within a related field, such as a Master's degree in physics or equivalent, or
  • substantial advanced course work at the Master level, or comparable, including an independent research project

A person meets the specific admission requirements for third cycle studies in Physics if he or she has:

  1. at least 90 credits of relevance to the subject, including at least 60 second-cycle credits, and a second-cycle degree project of at least 30 credits of relevance to the field, or
  2. a second cycle degree in a relevant field.

Other requirements:
Good knowledge in spoken and written English is a requirement.

Basis of assessment
Selection to postgraduate studies is based on the expected ability to perform well in the studies. The evaluation of the ability to perform well is based primarily on the results of studies at the basic and advanced levels, in particular:

  1. Knowledge and skills relevant to postgraduate studies within the research area, such as a broad and thorough preparation in physics.
  2. Estimated ability to work independently and the ability to formulate and solve scientific questions. This ability can be established, for example, based on undergraduate research experiences, a Master's thesis or in a discussion of scientific problems during a possible interview.
  3. Skills in written and oral communication.
  4. Other experience relevant to postgraduate studies, such as professional experience.
  5. We consider good cooperation ability, drive, creativity and ability to organize and structure your work as positive personal attributes.

Terms of employment
Only those admitted to third cycle studies may be appointed to a doctoral studentship. Third cycle studies at LTH consist of full-time studies for 4 years. A doctoral studentship is a fixed-term employment of a maximum of 5 years (including 20% departmental duties). Doctoral studentships are regulated in the Higher Education Ordinance (1998:80).

Application procedure
Applications must contain a covering letter in which applicants describe themselves and their particular research interests and in particular in a non-generic way explains why they are interested in the present position. Applications must also include a CV, a copy of the applicant’s Master’s thesis (or a summary text if the thesis is not yet completed), contact details of at least two references, copies of grade certificates, and any other documents that the applicant wishes to refer to.

Anställningsform Visstidsanställning längre än 6 månader
Tillträde Snarast
Löneform Månadslön
Antal lediga befattningar 1
Sysselsättningsgrad 100 %
Ort Lund
Län Skåne län
Land Sverige
Referensnummer PA2016/4791
Kontakt
  • Stefan Kröll, professor, +46 46 222 9626, stefan.kroll@fysik.lth.se
Facklig företrädare
  • OFR/ST:Fackförbundet ST:s kansli, 046-222 93 62, st@st.lu.se
  • SACO:Saco-s-rådet vid Lunds universitet, 046-222 93 64, kansli@saco-s.lu.se
Publicerat 2016-12-26
Sista ansökningsdag 2017-07-19

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