2000 character limit reached
Quantum sensing of time dependent electromagnetic fields with single electron excitations
Published 9 May 2024 in quant-ph and cond-mat.mes-hall | (2405.05796v1)
Abstract: In this study, we investigate the potential of electronic interferometers for probing the quantum state of electromagnetic radiation on a chip at sub-nanosecond time scales. We propose to use single electron excitations propagating within an electronic Mach-Zehnder interferometer in the Aharonov-Bohm dominated regime. We discuss how information about the quantum state of the electromagnetic radiation is encoded into the interference contribution to the average outgoing electrical current. By investigating squeezed radiation and single edge magnetoplasmons probed by Leviton pulses in a realistic setup, we show that single electron interferometers have the potential to probe quantum radiation in the time domain with sub-nanosecond to pico-second time resolution. Our research could have significant implications for probing the fundamental properties of light in the microwave to tera-Hertz domains at extremely short time scales.
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- This is justified by observing that Sba(ω0)|2/𝒬0S_{ba}(\omega_{0})|^{2}/\mathcal{Q}_{0}italic_S start_POSTSUBSCRIPT italic_b italic_a end_POSTSUBSCRIPT ( italic_ω start_POSTSUBSCRIPT 0 end_POSTSUBSCRIPT ) | start_POSTSUPERSCRIPT 2 end_POSTSUPERSCRIPT / caligraphic_Q start_POSTSUBSCRIPT 0 end_POSTSUBSCRIPT is significantly smaller than unity and experimentally achieved squeezing parameters are below z≃0.0719similar-to-or-equals𝑧0.0719z\simeq 0.0719italic_z ≃ 0.0719. Even a 3 dBtimes3decibel3\text{\,}\mathrm{dB}start_ARG 3 end_ARG start_ARG times end_ARG start_ARG roman_dB end_ARG noise reduction corresponds to z≃0.1733similar-to-or-equals𝑧0.1733z\simeq 0.1733italic_z ≃ 0.1733.
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- The radius one reflects the relaxation resistance Rq=RK/2subscript𝑅𝑞subscript𝑅𝐾2R_{q}=R_{K}/2italic_R start_POSTSUBSCRIPT italic_q end_POSTSUBSCRIPT = italic_R start_POSTSUBSCRIPT italic_K end_POSTSUBSCRIPT / 2 of the circuit predicted in Ref. [107].
- We will discuss other cases later but for the average current, any other contribution would be irrelevant.
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