ZhETF, Vol. 139,
p. 636 (April 2011)
(English translation - JETP,
Vol. 112, No. 4,
available online at www.springer.com
ENGINEERING OF SCHRÖDINGER CAT STATES BY A SEQUENCE OF DISPLACEMENTS AND PHOTON ADDITIONS OR SUBTRACTIONS
Received: October 14, 2009
A method to generate Schrödinger cat states in free propagating optical fields based on the use of displaced states (or displacement operators) is developed. Some optical schemes with photon-added coherent states are studied. The schemes are modifications of the general method based on a sequence of displacements and photon additions or subtractions adjusted to generate Schrödinger cat states of a larger size. The effects of detection inefficiency are taken into account.