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Nonreciprocity Realized with Quantum Nonlinearity.
- Source :
-
Physical review letters [Phys Rev Lett] 2018 Sep 21; Vol. 121 (12), pp. 123601. - Publication Year :
- 2018
-
Abstract
- Nonreciprocal devices are a key element for signal routing and noise isolation. Rapid development of quantum technologies has boosted the demand for a new generation of miniaturized and low-loss nonreciprocal components. Here, we use a pair of tunable superconducting artificial atoms in a 1D waveguide to experimentally realize a minimal passive nonreciprocal device. Taking advantage of the quantum nonlinear behavior of artificial atoms, we achieve nonreciprocal transmission through the waveguide in a wide range of powers. Our results are consistent with theoretical modeling showing that nonreciprocity is associated with the population of the two-qubit nonlocal entangled quasidark state, which responds asymmetrically to incident fields from opposing directions. Our experiment highlights the role of quantum correlations in enabling nonreciprocal behavior and opens a path to building passive quantum nonreciprocal devices without magnetic fields.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 121
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 30296135
- Full Text :
- https://doi.org/10.1103/PhysRevLett.121.123601