How To Reach Us


Service de Physique de l'Etat Condensé (SPEC)
L'Orme des Merisiers
91190 Saint-Aubin, France
SPEC is located 20km south-west of Paris, in a place called Orme des Merisiers (see map). It is part of the area called Plateau de Saclay

By train and bus

From Paris or the airport, take the train RER B (Time Tables here) direction Saint-Remy-les-Chevreuse. Then, there are several possibilities:

  • Exit at Le Guichet (approx. 35 minutes from Paris, 1h15 from Charles-de-Gaulle) and take the pedestrian underpass at the front of the train. Turn right after the cafe and cross the street. A pedestrian way on the left (marked "Parc de Stationnement de Corbeville") leads to the bus station. Free shuttles run from the left side of the street (opposite the bus station) every 15 minutes from 8.00 am to 9.45am and at 12.55 pm. They reach Orme des Merisiers 7 minutes later. Outside these hours, take bus 269-02 at the bus station. It leaves every 20-25 minutes and reaches Orme des Merisiers in approx. 15 minutes. This bus is free with a weekly or monthly pass "Navigo zone 5"; otherwise, tickets can be purchased on the bus; if you have subway tickets for Paris (ticket t) you can also use those.
  • Exit at Massy-Palaiseau (approx. 25 minutes from Paris, 1h05 from Charles-de-Gaulle). Walk up the stairs at the front of the train, turn left and walk down the steps on your right. Continue for 20 meters until you reach bus stop 91-06. This bus is free with the weekly or monthly pass "Navigo zones 4-5"; otherwise, tickets can be purchased on the bus; if you have subway tickets (ticket t) for Paris you can also use those. Exit the bus at Orme des Merisiers (20 minutes from Massy-Palaiseau). Timetables can be found on the website of public transportation in Paris area (Departure point: Gare de Massy Palaiseau, Arrival point: Orme des Merisiers).
  • Sometimes taxis are also available in Le Guichet. They can cost around 15-20 euros. If there are no taxis in Le Guichet, you can order one by phone. Two of the larger companies you can find in the yellow pages are Taxis D'Orsay (01 69 28 82 67) and Taxis Les Ulis (01 69 07 48 88). Two warnings: we got those numbers ourselves from the yellow pages, and have no other information about these companies. Also, the driver may not speak English.

By car

  • Determine the best route with mappy or viamichelin. As arrival point, fill in Route de l'Orme, town Saint-Aubin, zip code 91190. Enter Orme des Merisiers. SPEC is located right of the road.