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Indirect quantum tomography of quadratic Hamiltonians

ArXiv identifier:

1004.5018

Speakers:

Koji Maruyama

Authors:

D. Burgarth, K. Maruyama, F. Nori

A number of many-body problems can be formulated using Hamiltonians that are quadratic in the creation and annihilation operators. Here, we show how such quadratic Hamiltonians can be efficiently estimated indirectly, employing very few resources. We find that almost all properties of the Hamiltonian are determined by its surface, and that these properties can be measured even if the system can only be initialised to a mixed state.

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Quantum Africa 2010

Submission deadline:

Tuesday, June 29, 2010

Registration deadline:

Friday, July 30, 2010

Quantum Africa is a new series of conferences planned to take place consecutively in several African countries. The start of the series will be hosted in Durban by the Centre for Quantum Technology with a conference on progress in quantum technologies. Just as a successful preceding conference, it will feature many international renowned speakers and experts in quantum information processing, quantum optics, ultra-cold atoms and other relevant areas of quantum technologies. We hope to welcome many guests from Africa as well as from overseas.

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Three-day introductory course on quantum information and ultracold quantum gases

We offer a three-day introductory course on quantum information and ultracold quantum gases, addressed to advanced undergraduate students before or just starting with a master or diploma thesis. Specialized knowledge in the field is not required, just basic knowledge in quantum physics and AMO physics.

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UKZN Research Group secures communication for the 2010 World Cup

Building on the quantumCity initiative, the eThekwini Municipality and the Centre for Quantum Technology, a research group of the University of KwaZulu-Natal (UKZN), has moved to secure the network linking the Moses Mabhida Stadium and the Joint Operation Centre in the city of Durban during the 2010 FIFA World Cup.

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Post -doc position at the atom chip lab in Israel

At the atom chip lab in Ben-Gurion university in Israel we do a wide range of work from fundamental theory, through experiments and ending with material engineering for quantum optics. Candidates for post-doc positions in any of the above categories are welcome to apply. The BGU university is very close to the red sea, the mediterranean sea and the dead sea. We are in the midst of an exotic region filled with archaeology thousands of years old, fascinating geology and breathtaking nature.

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Theorists at MPQ find surprising behaviours in quantum random networks

The small-world property (that everyone has a few-step connection to celebrities), for instance, is a prominent result derived in this field. A group of scientists around Professor Cirac, Director at the Max Planck Institute of Quantum Optics (Garching near Munich) and Leader of the Theory Division, has now introduced complex networks in the microscopic, so called, quantum regime (Nature Physics, Advanced Online Publication, DOI:10.1038/NPHYS1665).

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International Conference On Quantum Systems, Classical Measurements and Consequences

'''Topics'''
* Decoherence, Quantum-Classical transition
* Tomography
* Zeno dynamics
* Geometric Quantum Mechanics
* Separation and Entanglement
* Stochastic Quantum Dynamics

'''Venue'''
* Prashanti Kutiram, Swami Vivekananda Yoga Research Foundation, Bangalore, India

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DPG Physics School 2010 "Nanophotonics Meets Quantum Optics"

In this school, world-renowned experts on the quantum mechanical coupling of light and matter using micro- and nanophotonics components will give lectures, starting at an introductory level and leading up to problems of current research. The tutorial nature of the courses makes them particularly suited for advanced students at the Diplom/M.Sc. level as well as PhD students.

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High-NOON states

Physicists in Israel are the first to entangle five photons in a NOON state – the superposition of two extreme quantum states. Unlike previous schemes for creating such states, the researchers claim that their new technique can entangle an arbitrarily large number of photons – so called “high-NOON states”. This could be good news for those developing quantum metrology techniques because high-NOON states could be used to improve the precision of a range of different measurements.

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