The Department of Microtechnology and Nanoscience focuses on research, innovation and education within the fields of future electronics, photonics, bio- and nanosystems. A close collaboration with Swedish and international partners within academia, industry and society enables scientific excellence and creates an innovative environment. In addition to the 200 researchers and PhD students, MC2 houses a cleanroom for micro- and nanofabrication with the latest equipment.

Information about the research and the project
Quantum computers, i.e. devices in which quantum information can be encoded, processed and read out, are expected to solve certain computational tasks faster than classical computers. This property is referred to as quantum advantage. Despite the optimism towards the possible forthcoming achievements in quantum technologies, a conclusive experimental evidence of quantum advantage is still lacking: it has not yet been possible to build a quantum computer with a number of qubits that is large enough to practically beat classical machines.

The Continuous-Variable (CV) approach is emerging as a promising alternative to the use of qubits for information encoding. While qubits are encoded on two-level quantum systems, the CV approach relies on quantized variables with a continuous spectrum: for instance, the position and momentum of a particle, or the amplitude (q) and phase (p) quadratures of the quantized electromagnetic field. Up to one-million optical modes have been entangled in CV in 2016, which represents a striking progress with respect to DV systems, where only a few tens of qubits can be entangled nowadays. Therefore, CV systems are promising to overcome the problem of scalability. Furthermore, CV implementations beyond the purely optical realm are started to being studied, namely in opto-mechanics, or with microwaves coupled to superconducting devices.

The goal of this PhD project is to explore the origins of quantum advantage for computation in CV architectures, and to assess whether simple criteria can be provided. A particular focus will be given on sub-universal models of quantum computation that allow one to efficiently sample from a probability distribution that cannot be efficiently sampled with a classical computer.

For this project, we seek for a motivated student with interests and possibly expertises at the cross-over between quantum physics and computer science. The PhD will be carried at Chalmers University of Technology in Gothenburg, where regular exchanges with experimentalist and theorists working on superconducting qubits (Per Delsing, Göran Johansson, Jonas Bylander) are in order. Further collaborations will involve the computer science group of Elham Kashefi in Paris. 

Major responsibilities
Your major responsibilities are to pursue your own doctoral studies. You are expected to develop your own scientific concepts and communicate the results of your research verbally and in writing in English. The position generally also includes teaching on Chalmers' undergraduate level or performing other duties corresponding to 20 per cent of working hours.

Position summary
Full-time temporary employment. The position is limited to a maximum of five years.

Qualifications
To qualify as a PhD student, you must have a master's level degree corresponding to at least 240 higher education credits in a relevant field.

The position requires sound verbal and written communication skills in English. Chalmers offers Swedish courses.

Chalmers continuously strives to be an attractive employer. Equality and diversity are substantial foundations in all activities at Chalmers.

Application procedure
The application should be marked with Ref 20180049 and written in English. The application should be sent electronically and be attached as pdf-files, as below:

CV: (Please name the document: CV, Family name, Ref. number)
• CV
• Other, for example previous employments or leadership qualifications and positions of trust.
• Two references that we can contact.

Personal letter: (Please name the document as: Personal letter, Family name, Ref. number)
• 1-3 pages where you introduce yourself and present your qualifications.
• Previous research fields and main research results.
• Future goals and research focus. Are there any specific projects and research issues you are primarily interested in?

Other documents:
• Copies of bachelor and/or master’s thesis.
• Attested copies and transcripts of completed education, grades and other certificates, eg. TOEFL test results.

Please use the button at the foot of the page to reach the application form. The files may be compressed (zipped).

Application deadline: 18 March, 2018

For questions, please contact:
Dr Giulia Ferrini, e-mail: giulia.ferrini@gmail.com

*** Chalmers declines to consider all offers of further announcement publishing or other types of support for the recruiting process in connection with this position. *** 
   



Chalmers University of Technology conducts research and education in engineering sciences, architecture, technology-related mathematical sciences, natural and nautical sciences, working in close collaboration with industry and society. The strategy for scientific excellence focuses on our eight Areas of Advance; Building Futures, Energy, Information & Communication Technology, Life Science, Materials Science, Nanoscience & Nanotechnology, Production and Transport. The aim is to make an active contribution to a sustainable future using the basic sciences as a foundation and innovation and entrepreneurship as the central driving forces. Chalmers has around 11,000 students and 3,000 employees. New knowledge and improved technology have characterised Chalmers since its foundation in 1829, completely in accordance with the will of William Chalmers and his motto: Avancez!