RT Journal Article
T1 Evading Vacuum Noise: Wigner Projections or Husimi Samples?
A1 Müller, C. R.
A1 Peuntinger, P.
A1 Dirmeier, Thomas
A1 Khan, I.
A1 Vogl, U.
A1 Leuchs, Gerd
A1 Sánchez Soto, Luis Lorenzo
A1 Teo, Y. S.
A1 Hradil, Zdenek
A1 Řeháček, J.
AB The accuracy in determining the quantum state of a system depends on the type of measurement performed. Homodyne and heterodyne detection are the two main schemes in continuous-variable quantum information. The former leads to a direct reconstruction of the Wigner function of the state, whereas the latter samples its Husimi Q function. We experimentally demonstrate that heterodyne detection outperforms homodyne detection for almost all Gaussian states, the details of which depend on the squeezing strength and thermal noise.
PB American Physical Society
SN 0031-9007
YR 2016
FD 2016-08-11
LK https://hdl.handle.net/20.500.14352/19001
UL https://hdl.handle.net/20.500.14352/19001
LA eng
NO © 2016 American Physical Society.We thank Herbert Welling and Sascha Wallentowitz for discussions about different aspects of optical heterodyne detection. We acknowledge financial support from the European Research Council (Advanced Grant PACART), the Spanish MINECO (Grant No. FIS2015-67963-P), the Technology Agency of the Czech Republic (Grant No. TE01020229), the Grant Agency of the Czech Republic (Grant No. 15-03194S), and the IGA Project of Palacký University (Grant No. IGA PrF 2016-005).
NO Unión Europea. FP7
NO European Research Council (ERC)
NO Ministerio de Economía y Competitividad (MINECO)
NO Technologická agentura České republiky (TAČR) = Technology Agency of the Czech Republic, República Checa
NO Czech Science Foundation (GACR), República Checa
NO Palacký University (IGA Project)
DS Docta Complutense
RD 22 abr 2025