Tunable Coupling of a Double Quantum Dot Spin System to a Mechanical Resonator

Nano Letters
S G CarterD Gammon

Abstract

The interaction of quantum systems with mechanical resonators is of practical interest for applications in quantum information and sensing and also of fundamental interest as hybrid quantum systems. Achieving a large and tunable interaction strength is of great importance in this field as it enables controlled access to the quantum limit of motion and coherent interactions between different quantum systems. This has been challenging with solid state spins, where typically the coupling is weak and cannot be tuned. Here we use pairs of coupled quantum dots embedded within cantilevers to achieve a high coupling strength of the singlet-triplet spin system to mechanical motion through strain. Two methods of achieving strong, tunable coupling are demonstrated. The first is through different strain-induced energy shifts for the two QDs when the cantilever vibrates, resulting in changes to the exchange interaction. The second is through a laser-driven AC Stark shift that is sensitive to strain-induced shifts of the optical transitions. Both of these mechanisms can be tuned to zero with electrical bias or laser power, respectively, and give large spin-mechanical coupling strengths.

References

Mar 24, 2005·Physical Review Letters·H J KrennerJ J Finley
Jan 18, 2006·Science·E A StinaffD Gammon
Aug 19, 2007·Science·Xiaodong XuL J Sham
Jun 13, 2012·Nano Letters·Christopher E KuklewiczBrian D Gerardot
Dec 18, 2013·Physical Review Letters·E R MacQuarrieG D Fuchs
Jul 11, 2014·Nano Letters·Michele MontinaroMartino Poggio
Jul 19, 2014·Nature Communications·Preeti OvartchaiyapongAnia C Bleszynski Jayich
Jul 26, 2014·Physical Review Letters·J TeissierP Maletinsky
Apr 29, 2015·Nature Nanotechnology·Florian J R SchüleinHubert J Krenner
Jul 18, 2015·Nature Communications·Patrick M VoraDaniel Gammon
Jul 16, 2017·Nature Communications·Mathieu MunschRichard J Warburton
May 24, 2018·Nature Communications·Young-Ik SohnMarko Lončar
Nov 23, 2018·Nature·K J SatzingerA N Cleland
Jan 5, 2019·Physical Review Letters·S G CarterD Gammon

❮ Previous
Next ❯

Citations

Dec 23, 2020·Nature Nanotechnology·Jan KettlerJean-Philippe Poizat
Jun 3, 2021·Nature Communications·Maxim K ZalalutdinovBrian H Houston

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.