Journal
PHYSICAL REVIEW A
Volume 79, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.012306
Keywords
BCS theory; fermion systems; Heisenberg model; information theory; superconductivity; superfluidity
Categories
Funding
- Elite Network of Bavaria QCCC
- DFG within SFB 631
- DFG Cluster of Excellence Munich-Centre for Advanced Photonics
- QUANTOP
- Danish Natural Science Research Council (FNU)
Ask authors/readers for more resources
The notion of paired fermions is central to important condensed-matter phenomena such as superconductivity and superfluidity. While the concept is widely used and its physical meaning is clear, there exists no systematic and mathematical theory of pairing that would allow us to unambiguously characterize and systematically detect paired states. We propose a definition of pairing and develop methods for its detection and quantification applicable to current experimental setups. Pairing is shown to be a quantum correlation different from entanglement, giving further understanding in the structure of highly correlated quantum systems. In addition, we will show the resource character of paired states for precision metrology, proving that the BCS states allow phase measurements at the Heisenberg limit.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available