Journal
MODERN PHYSICS LETTERS B
Volume 26, Issue 18, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217984912300104
Keywords
Quantum metrology; quantum entanglement; Bose-Einstein condensates; light-matter interfaces
Funding
- EPSRC [EP/H03031X/1]
- US EOARD [093020]
- EU
- Department of Science and Technology, Government of India, through the fast-track scheme for young scientist [100/IFD/5771/2010-11]
- Engineering and Physical Sciences Research Council [EP/H03031X/1] Funding Source: researchfish
- EPSRC [EP/H03031X/1] Funding Source: UKRI
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We scrutinize the role of quantum entanglement in quantum metrology and discuss recent advances in nonlinear quantum metrology that allow improved scalings of the measurement precision with respect to the available resources. Such schemes can surpass the conventional Heisenberg limited scaling of 1/N of quantum enhanced metrology. Without investing in the preparation of entangled states, we review how systems with intrinsic nonlinearities such as Bose-Einstein condensates and light-matter interfaces can provide improved scaling in single parameter estimation.
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