Large-bandwidth Transduction Between an Optical Single Quantum Dot Molecule and a Superconducting Resonator

Tsuchimoto, Yuta; Sun, Zhe; Togan, Emre; Fält, Stefan; Wegscheider, Werner; Wallraff, Andreas; Ensslin, Klaus; İmamoğlu, Ataç; Kroner, Martin

doi:10.1103/prxquantum.3.030336

Cited by 8 publications

(1 citation statement)

References 49 publications

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“…[ 7 ] Together, these properties make QDs promising as spin‐photon interfaces [ 8 ] for the on‐demand generation of 1D photonic cluster states [ 9,10 ] or quantum transduction between microwave and infrared photons. [ 11 ]…”

Section: Introductionmentioning

confidence: 99%

Quantum Dot Molecule Devices with Optical Control of Charge Status and Electronic Control of Coupling

et al. 2022

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Tunnel-coupled pairs of optically active quantum dots-quantum dot molecules (QDMs)-offer the possibility to combine excellent optical properties such as strong light-matter coupling with two-spin singlet-triplet (S − T 0 ) qubits having extended coherence times. The S − T 0 basis formed using two spins is inherently protected against electric and magnetic field noise. However, since a single gate voltage is typically used to stabilize the charge occupancy of the dots and control the inter-dot orbital couplings, operation of the S − T 0 qubits under optimal conditions remains challenging. Here, an electric field tunable QDM that can be optically charged with one (1h) or two holes (2h) on demand is presented. A four-phase optical and electric field control sequence facilitates the sequential preparation of the 2h charge state and subsequently allows flexible control of the inter-dot coupling. Charges are loaded via optical pumping and electron tunnel ionization. Oneand two-hole charging efficiencies of (93.5 ± 0.8)% and (80.5 ± 1.3)% are achieved, respectively. Combining efficient charge state preparation and precise setting of inter-dot coupling allows for the control of few-spin qubits, as would be required for the on-demand generation of 2D photonic cluster states or quantum transduction between microwaves and photons.

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Section: Introductionmentioning

confidence: 99%

Quantum Dot Molecule Devices with Optical Control of Charge Status and Electronic Control of Coupling

et al. 2022

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Quantum information processing with superconducting circuits: A perspective

Wendin

2024

Encyclopedia of Condensed Matter Physics

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Quantum capacities of transducers

Wang

Jiang

2022

Nat Commun

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High-performance quantum transducers, which faithfully convert quantum information between disparate physical carriers, are essential in quantum science and technology. Different figures of merit, including efficiency, bandwidth, and added noise, are typically used to characterize the transducers’ ability to transfer quantum information. Here we utilize quantum capacity, the highest achievable qubit communication rate through a channel, to define a single metric that unifies various criteria of a desirable transducer. Using the continuous-time quantum capacities of bosonic pure-loss channels as benchmarks, we investigate the optimal designs of generic quantum transduction schemes implemented by transmitting external signals through a coupled bosonic chain. With physical constraints on the maximal coupling rate $${g}_{\max }$$ g max , the highest continuous-time quantum capacity $${Q}^{\max }\approx 31.4{g}_{\max }$$ Q max ≈ 31.4 g max is achieved by transducers with a maximally flat conversion frequency response, analogous to Butterworth electric filters. We further investigate the effect of thermal noise on the performance of transducers.

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Large-bandwidth Transduction Between an Optical Single Quantum Dot Molecule and a Superconducting Resonator

Cited by 8 publications

References 49 publications

Quantum Dot Molecule Devices with Optical Control of Charge Status and Electronic Control of Coupling

Quantum Dot Molecule Devices with Optical Control of Charge Status and Electronic Control of Coupling

Quantum information processing with superconducting circuits: A perspective

Quantum capacities of transducers

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