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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.23002 |
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| _version_ | 1866915886866104320 |
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| author | Schnüriger, Gian-Marco Kroner, Martin Togan, Emre Knüppel, Patrick Delteil, Aymeric Fält, Stefan Wegscheider, Werner Imamoglu, Atac |
| author_facet | Schnüriger, Gian-Marco Kroner, Martin Togan, Emre Knüppel, Patrick Delteil, Aymeric Fält, Stefan Wegscheider, Werner Imamoglu, Atac |
| contents | Cavity exciton--polaritons are quasiparticles that form when quantum well excitons hybridize with a cavity mode. Here, we carry out photon correlation measurements under continuous wave resonant laser excitation to demonstrate quantum correlations between cavity--polaritons. Our experiments reveal an unexpectedly strong dependence of polariton interactions on cavity--exciton detuning. When the polaritons are predominantly exciton-like, we observe a transition from photon antibunching to bunching as the laser is tuned across the polariton resonance, in agreement with a simple Kerr-nonlinearity model. When the lower-branch polariton energy is tuned to induce a two-polariton Feshbach resonance with the biexciton mode, the degree of polariton antibunching becomes independent of the laser detuning: we explain our finding by invoking a dissipative blockade mechanism arising from large biexciton broadening. Our experiments demonstrate that the strong polariton blockade regime would be achieved by reducing the polariton decay rate by a factor of 10. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_23002 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum correlations and dissipative blockade of polaritons in a tunable fiber cavity Schnüriger, Gian-Marco Kroner, Martin Togan, Emre Knüppel, Patrick Delteil, Aymeric Fält, Stefan Wegscheider, Werner Imamoglu, Atac Mesoscale and Nanoscale Physics Cavity exciton--polaritons are quasiparticles that form when quantum well excitons hybridize with a cavity mode. Here, we carry out photon correlation measurements under continuous wave resonant laser excitation to demonstrate quantum correlations between cavity--polaritons. Our experiments reveal an unexpectedly strong dependence of polariton interactions on cavity--exciton detuning. When the polaritons are predominantly exciton-like, we observe a transition from photon antibunching to bunching as the laser is tuned across the polariton resonance, in agreement with a simple Kerr-nonlinearity model. When the lower-branch polariton energy is tuned to induce a two-polariton Feshbach resonance with the biexciton mode, the degree of polariton antibunching becomes independent of the laser detuning: we explain our finding by invoking a dissipative blockade mechanism arising from large biexciton broadening. Our experiments demonstrate that the strong polariton blockade regime would be achieved by reducing the polariton decay rate by a factor of 10. |
| title | Quantum correlations and dissipative blockade of polaritons in a tunable fiber cavity |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2603.23002 |