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Engineering and Imaging Nonlocal Spi...

Davis, Emily Jane.

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Engineering and Imaging Nonlocal Spin Dynamics in an Optical Cavity.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Engineering and Imaging Nonlocal Spin Dynamics in an Optical Cavity./
Author:	Davis, Emily Jane.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
Description:	185 p.
Notes:	Source: Dissertations Abstracts International, Volume: 82-02, Section: B.
Contained By:	Dissertations Abstracts International82-02B.
Subject:	Theoretical physics. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28103949
ISBN:	9798662510487

Engineering and Imaging Nonlocal Spin Dynamics in an Optical Cavity.
Davis, Emily Jane.

Engineering and Imaging Nonlocal Spin Dynamics in an Optical Cavity. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 185 p.

Source: Dissertations Abstracts International, Volume: 82-02, Section: B.

Thesis (Ph.D.)--Stanford University, 2020.

This item must not be sold to any third party vendors.

Photon-mediated interactions between atoms coupled to an optical cavity are a powerful tool for engineering entangled states and many-body Hamiltonians. These applications motivate the construction of an optical cavity enabling coherent nonlocal spin interactions, with transverse optical access for high-resolution imaging and addressing of atomic sub-ensembles. Using this apparatus, we implement a nonlocal Heisenberg Hamiltonian, where the relative strength and sign of spin-exchange and Ising couplings are controllable parameters. This tunability enables the demonstration of an interaction-induced protection of spin coherence against single-atom dephasing terms. The optical access afforded by a near-concentric cavity facilitates local control and imaging of the magnetization for Hamiltonian tomography and spatially resolved detection of the spin coherence. Imaging also allows for the first observation of cavity-mediated spin mixing in a spin-1 system, a new mechanism for generating correlated atom pairs. Whereas the single-mode cavity most naturally mediates all-to-all couplings, I will also discuss progress in generalizing to control the distance-dependence of the interactions, with prospects in engineering the spatial structure of entanglement. I furthermore propose and analyze two specific protocols in quantum control enabled by strong and tunable atom-light interactions. I first introduce a protocol that enables entanglement-enhanced measurements near the Heisenberg limit while reducing technical requirements on detection. This is accomplished via an interaction-enhanced readout that relies on reversing the sign of global Ising interactions. Dispersive atom-light interactions also enable heralded schemes, in which a high-fidelity pure state is produced upon probabilistic detection of a single photon. In this context, I show how a time-shaped single-photon pulse can "paint" an arbitrary superposition of coherent spin states while avoiding infidelities due to finite cavity linewidth.

ISBN: 9798662510487Subjects--Topical Terms:

2144760
Theoretical physics.
Subjects--Index Terms:

Entanglement

Engineering and Imaging Nonlocal Spin Dynamics in an Optical Cavity.
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245 1 0 $a Engineering and Imaging Nonlocal Spin Dynamics in an Optical Cavity.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 185 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-02, Section: B.
500 $a Advisor: Schleier-Smith, Monika;Hollberg, Leo;Safavi-Naeini, Amir.
502 $a Thesis (Ph.D.)--Stanford University, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Photon-mediated interactions between atoms coupled to an optical cavity are a powerful tool for engineering entangled states and many-body Hamiltonians. These applications motivate the construction of an optical cavity enabling coherent nonlocal spin interactions, with transverse optical access for high-resolution imaging and addressing of atomic sub-ensembles. Using this apparatus, we implement a nonlocal Heisenberg Hamiltonian, where the relative strength and sign of spin-exchange and Ising couplings are controllable parameters. This tunability enables the demonstration of an interaction-induced protection of spin coherence against single-atom dephasing terms. The optical access afforded by a near-concentric cavity facilitates local control and imaging of the magnetization for Hamiltonian tomography and spatially resolved detection of the spin coherence. Imaging also allows for the first observation of cavity-mediated spin mixing in a spin-1 system, a new mechanism for generating correlated atom pairs. Whereas the single-mode cavity most naturally mediates all-to-all couplings, I will also discuss progress in generalizing to control the distance-dependence of the interactions, with prospects in engineering the spatial structure of entanglement. I furthermore propose and analyze two specific protocols in quantum control enabled by strong and tunable atom-light interactions. I first introduce a protocol that enables entanglement-enhanced measurements near the Heisenberg limit while reducing technical requirements on detection. This is accomplished via an interaction-enhanced readout that relies on reversing the sign of global Ising interactions. Dispersive atom-light interactions also enable heralded schemes, in which a high-fidelity pure state is produced upon probabilistic detection of a single photon. In this context, I show how a time-shaped single-photon pulse can "paint" an arbitrary superposition of coherent spin states while avoiding infidelities due to finite cavity linewidth.
590 $a School code: 0212.
650 4 $a Theoretical physics. $3 2144760
650 4 $a Optics. $3 517925
650 4 $a Atomic physics. $3 3173870
653 $a Entanglement
653 $a Coherent spin states
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690 $a 0753
690 $a 0748
710 2 $a Stanford University. $3 754827
773 0 $t Dissertations Abstracts International $g 82-02B.
790 $a 0212
791 $a Ph.D.
792 $a 2020
793 $a English
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