Details
| Original language | English |
|---|---|
| Article number | 053820 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 87 |
| Issue number | 5 |
| Publication status | Published - 15 May 2013 |
Abstract
Spin squeezing of collective atomic spins can be achieved conditionally via probing with light and subsequent homodyne detection, as is done in a quantum nondemolition measurement. Recently it has been shown that squeezing can also be created unconditionally by a properly designed dissipative dynamics. We compare the two approaches in a Gaussian description and optimize over all Gaussian light-matter interactions. We find that in the optimal unconditional scheme based on dissipation the level of squeezing scales with optical depth as d -1/2. In contrast, the optimal conditional scheme based on measurement of light - which in fact is not a quantum nondemolition measurement - can provide squeezing which scales as d-1. Our results apply directly also to the creation of entanglement in the form of nonlocal spin squeezing of two atomic ensembles.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 87, No. 5, 053820, 15.05.2013.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Dissipative versus conditional generation of gaussian entanglement and spin squeezing
AU - Vasilyev, Denis V.
AU - Muschik, Christine A.
AU - Hammerer, Klemens
PY - 2013/5/15
Y1 - 2013/5/15
N2 - Spin squeezing of collective atomic spins can be achieved conditionally via probing with light and subsequent homodyne detection, as is done in a quantum nondemolition measurement. Recently it has been shown that squeezing can also be created unconditionally by a properly designed dissipative dynamics. We compare the two approaches in a Gaussian description and optimize over all Gaussian light-matter interactions. We find that in the optimal unconditional scheme based on dissipation the level of squeezing scales with optical depth as d -1/2. In contrast, the optimal conditional scheme based on measurement of light - which in fact is not a quantum nondemolition measurement - can provide squeezing which scales as d-1. Our results apply directly also to the creation of entanglement in the form of nonlocal spin squeezing of two atomic ensembles.
AB - Spin squeezing of collective atomic spins can be achieved conditionally via probing with light and subsequent homodyne detection, as is done in a quantum nondemolition measurement. Recently it has been shown that squeezing can also be created unconditionally by a properly designed dissipative dynamics. We compare the two approaches in a Gaussian description and optimize over all Gaussian light-matter interactions. We find that in the optimal unconditional scheme based on dissipation the level of squeezing scales with optical depth as d -1/2. In contrast, the optimal conditional scheme based on measurement of light - which in fact is not a quantum nondemolition measurement - can provide squeezing which scales as d-1. Our results apply directly also to the creation of entanglement in the form of nonlocal spin squeezing of two atomic ensembles.
UR - http://www.scopus.com/inward/record.url?scp=84877969098&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.87.053820
DO - 10.1103/PhysRevA.87.053820
M3 - Article
AN - SCOPUS:84877969098
VL - 87
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 5
M1 - 053820
ER -