TY - JOUR
T1 - Squeezing giant spin states via geometric phase control in cavity-assisted Raman transitions
AU - Xia, Keyu
N1 - Copyright The Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.
PY - 2017/10/9
Y1 - 2017/10/9
N2 - Squeezing ensemble of spins provides a way to surpass the standard quantum limit in quantum metrology and test the fundamental physics as well, and therefore attracts broad interest. Here we propose an experimentally accessible protocol to squeeze a giant ensemble of spins via the geometric phase control (GPC). Using the cavity-assisted Raman transition (CART) in a double Λ-type system, we realize an effective Dicke model. Under the condition of vanishing effective spin transition frequency, we find a particular evolution time where the cavity decouples from the spins and the spin ensemble is squeezed considerably. Our scheme combines the CART and the GPC, and has the potential to improve the sensitivity in quantum metrology with spins by about two orders.
AB - Squeezing ensemble of spins provides a way to surpass the standard quantum limit in quantum metrology and test the fundamental physics as well, and therefore attracts broad interest. Here we propose an experimentally accessible protocol to squeeze a giant ensemble of spins via the geometric phase control (GPC). Using the cavity-assisted Raman transition (CART) in a double Λ-type system, we realize an effective Dicke model. Under the condition of vanishing effective spin transition frequency, we find a particular evolution time where the cavity decouples from the spins and the spin ensemble is squeezed considerably. Our scheme combines the CART and the GPC, and has the potential to improve the sensitivity in quantum metrology with spins by about two orders.
UR - http://www.scopus.com/inward/record.url?scp=85031028669&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/CE1101013
U2 - 10.1038/s41598-017-12486-1
DO - 10.1038/s41598-017-12486-1
M3 - Article
C2 - 28993677
AN - SCOPUS:85031028669
SN - 2045-2322
VL - 7
SP - 1
EP - 7
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 12836
ER -