TY - JOUR

T1 - Two-photon interference in an atom-quantum dot hybrid system

AU - Vural, Hüseyin

AU - Portalupi, Simone L.

AU - Maisch, Julian

AU - Kern, Simon

AU - Weber, Jonas H.

AU - Jetter, Michael

AU - Wrachtrup, Jörg

AU - Löw, Robert

AU - Gerhardt, Ilja

AU - Michler, Peter

N1 - Funding information: Deutsche Forschungsgemeinschaft (DFG) (GE 2737/55, MI 500/30-1); Max-Planck-Gesellschaft (MPG); Baden-Württemberg Stiftung Post-doc Eliteprogramm via the project “Hybride Quantensysteme für Quantensensorik.”

PY - 2018/3/27

Y1 - 2018/3/27

N2 - Future quantum networks will need flying qubits and stationary nodes. As for the generation of single photons which may act as flying qubits, resonantly-excited single semiconductor quantum dots are ideal in terms of their on-demand single-photon emission, their indistinguishability, and their brightness. Atomic systems can effectively act as mediators for photon-photon interactions, storage media, or building blocks for stationary qubits. Here we hybridize these two systems and investigate the non-classical interference of spectral Lorentzian-shaped photons, fine-tuned between the cesium (Cs)-D1 hyperfine resonances. The temporal delay in the hot dispersive atomic cesium vapor amounts up to 50 times the photons initial width and reveals beats on the single quanta. The photons' indistinguishability is preserved even after atomic-enabled delay. This proves that the interaction with the Cs-vapor conserves the photons' coherence. The role of spectral diffusion in the solid state emitter is studied via the strong dependence of the single and two-photon experiments on the frequency. Our results pave the way to efficient hybrid interfaces between quantum dots and hot atomic vapors as storage media in future quantum networks.

AB - Future quantum networks will need flying qubits and stationary nodes. As for the generation of single photons which may act as flying qubits, resonantly-excited single semiconductor quantum dots are ideal in terms of their on-demand single-photon emission, their indistinguishability, and their brightness. Atomic systems can effectively act as mediators for photon-photon interactions, storage media, or building blocks for stationary qubits. Here we hybridize these two systems and investigate the non-classical interference of spectral Lorentzian-shaped photons, fine-tuned between the cesium (Cs)-D1 hyperfine resonances. The temporal delay in the hot dispersive atomic cesium vapor amounts up to 50 times the photons initial width and reveals beats on the single quanta. The photons' indistinguishability is preserved even after atomic-enabled delay. This proves that the interaction with the Cs-vapor conserves the photons' coherence. The role of spectral diffusion in the solid state emitter is studied via the strong dependence of the single and two-photon experiments on the frequency. Our results pave the way to efficient hybrid interfaces between quantum dots and hot atomic vapors as storage media in future quantum networks.

KW - Quantum Hybrid Systems

KW - Atomic Vapors

KW - Cesium

KW - Quantum Dots

KW - Hong-Ou-Mandel

UR - http://www.scopus.com/inward/record.url?scp=85045966186&partnerID=8YFLogxK

U2 - 10.1364/OPTICA.5.000367

DO - 10.1364/OPTICA.5.000367

M3 - Article

VL - 5

SP - 367

EP - 373

JO - OPTICA

JF - OPTICA

SN - 2334-2536

IS - 4

ER -