Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.100502
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Funding
- National Science Foundation [PHY05-51164]
- W. M. Keck Foundation Center for Extreme Quantum Information Theory
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Transport in a quantum point contact (QPC) can be used to generate many-body entanglement of Fermi seas in the leads. A universal relation is found between the generated entanglement entropy and the fluctuations of electric current, which is valid for any protocol of driving the QPC. This relation offers a basis for direct electric measurement of entanglement entropy. In particular, by utilizing space-time duality of 1D systems, we relate electric noise generated by opening and closing the QPC periodically in time with the seminal S = 1/3 logL prediction of conformal field theory.
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