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| 2. |
- Bolignano, D, et al.
(författare)
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Pulmonary hypertension in CKD
- 2013
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Ingår i: American journal of kidney diseases : the official journal of the National Kidney Foundation. - : Elsevier BV. - 1523-6838. ; 61:4, s. 612-622
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Tidskriftsartikel (refereegranskat)
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| 3. |
- Basset, F. Basso, et al.
(författare)
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Entanglement Swapping with Photons Generated on Demand by a Quantum Dot
- 2019
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Ingår i: Physical Review Letters. - : AMER PHYSICAL SOC. - 0031-9007 .- 1079-7114. ; 123:16
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Tidskriftsartikel (refereegranskat)abstract
- Photonic entanglement swapping, the procedure of entangling photons without any direct interaction, is a fundamental test of quantum mechanics and an essential resource to the realization of quantum networks. Probabilistic sources of nonclassical light were used for seminal demonstration of entanglement swapping, but applications in quantum technologies demand push-button operation requiring single quantum emitters. This, however, turned out to be an extraordinary challenge due to the stringent prerequisites on the efficiency and purity of the generation of entangled states. Here we show a proof-of-concept demonstration of all-photonic entanglement swapping with pairs of polarization-entangled photons generated on demand by a GaAs quantum dot without spectral and temporal filtering. Moreover, we develop a theoretical model that quantitatively reproduces the experimental data and provides insights on the critical figures of merit for the performance of the swapping operation. Our theoretical analysis also indicates how to improve stateof-the-art entangled-photon sources to meet the requirements needed for implementation of quantum dots in long-distance quantum communication protocols.
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| 4. |
- Gyger, Samuel, et al.
(författare)
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On-chip integration of reconfigurable quantum photonics with superconducting photodetectors
- 2021
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Ingår i: 2021 Conference on Lasers and Electro-Optics, CLEO 2021 - Proceedings. - : Institute of Electrical and Electronics Engineers Inc..
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Konferensbidrag (refereegranskat)abstract
- Scaling up quantum optics experiments requires on-chip reconfigurable quantum photonics, but their integration with detectors is a challenge. We show microelectrome-chanical reconfiguration of photonic circuits with on-chip superconducting single-photon detectors and demonstrate key applications.
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| 5. |
- Morley, W. T., et al.
(författare)
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Theory of double Cooper-pair tunneling and light emission mediated by a resonator
- 2019
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Ingår i: Physical Review B. - 2469-9969 .- 2469-9950. ; 100:5
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Tidskriftsartikel (refereegranskat)abstract
- Photon emission by tunneling electrons can be encouraged by locating a resonator close to the tunnel junction and applying an appropriate voltage bias. However, studies of normal metals show that the resonator also affects how the charges flow, facilitating processes in which correlated tunneling of two charges produces one photon. We develop a theory to analyze this kind of behavior in Josephson junctions by deriving an effective Hamiltonian describing processes where two Cooper pairs generate a single photon. We determine the conditions under which the transport is dominated by incoherent tunneling of two Cooper pairs, while also uncovering a regime of coherent double Cooper-pair tunneling. We show that the system can also display an unusual form of photon blockade and hence could serve as a single-photon source.
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| 6. |
- Pestun, Vasily, et al.
(författare)
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Localization techniques in quantum field theories
- 2017
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Ingår i: Journal of Physics A. - : IOP PUBLISHING LTD. - 1751-8113 .- 1751-8121. ; 50:44
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- This is the foreword to the special issue on localization techniques in quantum field theory. The summary of individual chapters is given and their interrelation is discussed.
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| 7. |
- Schimpf, Christian, et al.
(författare)
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Hyperfine interaction limits polarization entanglement of photons from semiconductor quantum dots
- 2023
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Ingår i: Physical Review B. - 2469-9950 .- 2469-9969. ; 108:8
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Tidskriftsartikel (refereegranskat)abstract
- Excitons in quantum dots are excellent sources of polarization-entangled photon pairs, but a quantitative understanding of their interaction with the nuclear spin bath is still missing. Here we investigate the role of hyperfine energy shifts using experimentally accessible parameters and derive an upper limit to the achievable entanglement fidelity. Our results are consistent with all available literature, indicate that spin noise is often the dominant process limiting the entanglement in InGaAs quantum dots, and suggest routes to alleviate its effect.
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| 8. |
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