We have reserved a block of rooms at the nearby Hotel Kong Arthur (Nørre Søgade 11, 1370 København K, Tel: +45 3311 1212). You can walk to the Niels Bohr Institute by the lakes (see map here).
Those arriving together can take a taxi from the airport to the hotel (we will send a taxi voucher beforehand). Alternatively take the metro which is even faster. We will send tickets beforehand or you can get one (3-zoner) for 36 DKK from a vending machine or at the DSB counter (this must be stamped before getting on). Get off at Nørreport - the hotel is a 5 min walk from there.
If there is any problem, please do not hesitate to contact the NBIA Coordinator Anette Luff Studsgård (+45 30450072).