Exploring Dephasing of a Solid-State Quantum Emitter via Time- and Temperature-Dependent Hong-Ou-Mandel Experiments

2015/07/31 by A. Thoma, Alexander Thoma, P. Schnauber +18 · 187 citations
Computer Science · Physics and Astronomy · #Common emitter #Condensed matter physics #Dephasing #Engineering physics #Materials science #Optoelectronics #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum mechanics #Semiconductor Quantum Structures and Devices #Solid-state #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevlett.116.033601

published in Physical Review Letters 116(3), 033601 (American Physical Society) · 11 pages, 7 figures

arxiv created 2015/12/22 · openalex publication_date 2016/01/19 · arxiv updated 2016/01/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We probe the indistinguishability of photons emitted by a semiconductor quantum dot (QD) via time- and temperature-dependent two-photon interference (TPI) experiments. An increase in temporal separation between consecutive photon emission events reveals a decrease in TPI visibility on a nanosecond time scale, theoretically described by a non-Markovian noise process in agreement with fluctuating charge traps in the QD's vicinity. Phonon-induced pure dephasing results in a decrease in TPI visibility from (96±4)% at 10 K to a vanishing visibility at 40 K. In contrast to Michelson-type measurements, our experiments provide direct access to the time-dependent coherence of a quantum emitter on a nanosecond time scale.

Citations

• Dephasing in Quantum Dots: Quadratic Coupling to Acoustic Phonons
• A Quantum Dot Single-Photon Turnstile Device
• Measurement of the Ultrafast Spectral Diffusion of the Optical Transition of Nitrogen Vacancy Centers in Nano-Size Diamond Using Correlation Interferometry

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