Progress of Theoretical and Experimental Physics (PTEP) is the successor of Progress of Theoretical Physics, which was founded by Hideki Yukawa in 1946 and over the years has published many important articles mainly in theoretical physics, including several papers that have led to the Nobel prize in physics. Its area of coverage has included high-energy physics, nuclear physics, astrophysics and cosmology, mathematical physics, and condensed matter physics.

On the other hand, experimental physics has enjoyed tremendous growth since the founding of the journal. To incorporate experimental physics as an equally important part as theoretical physics, Progress of Theoretical and Experimental Physics has been launched as a sister title to the Journal of Physical Society of Japan (JPSJ), replacing Progress of Theoretical Physics. The journal is being published by the Physical Society of Japan in collaboration with Oxford University Press. We will begin publishing regular issues from January 2013, following on from a number of special issues published in 2012.

The journal is fully open access and available online only. This policy will allow anyone with internet access to download all published papers free of any subscription fee. Furthermore, it will facilitate the rapid and world-wide communication of high-quality scientific results to all researchers and the general public, in response to the ever-increasing need for making important scientific achievements accessible to all members of society.

PTEP is an international journal and welcomes the submission of papers from authors all over the world. As a new initiative, we will place strong emphasis on the Letters section of our journal. The rapid communication of novel results in a short Letter format has gained considerably more importance in recent years. We are re-invigorating our efforts to accelerate our peer review process, especially for the Letters section. Electronic publication as an online only journal will certainly facilitate such rapid publication.

We are fortunate to have in place an international team of editors and reviewers who contribute a great deal of time and effort to the peer-review process for which we are extremely grateful. As Editor-in Chief, I would also like to acknowledge the dedication of our editorial staff both at the Physical Society of Japan and at Oxford University Press.

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