Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 33 for “"quantum memories"”.
-
Solid-State Quantum Memories for Near-Term Quantum Repeaters
Over the past decade, quantum computers have emerged as a promising technology to enable transformational advances in information processing and communication and solve problems that are intractable to classical computers. While there is great promise in linking quantum computers together over long …
-
A scalable quantum computation platform : solid state quantum memories coupled to photonic integrated circuits
Quantum computation and communication systems exploit quantum mechanical effects to surpass their classical counterparts in certain applications. However, while proof-of-principle experimental demonstrations have been performed, these are limited to a handful of nodes with limited - and often …
-
Multiplexed Quantum Networks for High-Fidelity Entanglement Distribution
… experimentally realizing the building blocks of quantum repeaters. Repeater architectures with multiplexed quantum memories have been proposed to increase entanglement distribution rates, but an open challenge is to maintain entanglement fidelity over long distances. In this thesis, I present a …
-
Photonic Entanglement for a Quantum Repeater
Quantum Key Distribution (QKD) has opened a new avenue for secure communication, by allowing one to distribute a random secret key between two users that are connected through a public channel without revealing information to unauthorized parties. If a message is encrypted with the one time pad (a …
-
Building efficient light-matter interfaces for quantum systems
Efficient collection of photons from quantum memories, such as quantum dots (QDs) and nitrogen vacancy (NVs) centers in diamond, is essential for various quantum technologies. This thesis describes the design, fabrication, and utilization of novel photonic structures and systems to achieve …
-
Quantum Information Processing with Color Center Qubits: Theory of Initialization and Robust Control
Quantum information technologies include secure quantum communications and ultra precise quantum sensing that are significantly more efficient than their classical counterparts. To enable such technologies, we need a scalable quantum platform in which qubits are con trollable. Color centers provide …
-
Techniques for Deployed Quantum Networks with Solid-State Defect Centers
… tremendous progress towards the development of quantum networks, wherein quantum states are transmitted over long distances for applications in distributed quantum computing, quantum-enhanced metrology, and quantum key distribution. In particular, recent results have demonstrated the fundamental …
-
Topics in quantum information theory and quantum many-body physics
… two results relating to the intersection between quantum information theory and quantum many-body physics. The first pertains to quantum algorithms, where few computational problems are believed to exhibit exponential separation between quantum and classical performance. For those that are, …
-
Superconducting nanowire single-photon detectors on aluminum nitride photonic integrated circuits
… advances in integrated single-photon sources and quantum memories, onchip integration of high-performance single-photon detectors becomes increasingly important. The superconducting nanowire single-photon detector (SNSPD) is the leading single-photon counting technology for quantum information …
-
Analysis of a Deterministic Entangled Photon Pair Source using Single Photons
Quantum repeaters are the most promising approach for distributing entanglement over long distances. Recent approaches to develop quantum repeaters involve the use of deterministic entangled photon pair sources. On the other hand heralded entangled photon pair sources have been proposed …
-
Hyperfine Interaction of the Group IV Color Centers
… candidates for spin-photon interfaces for use in quantum information technologies. They feature highly coherent optical transitions, as well as native electron and nuclear spins that can be used as quantum memories. While the optical and electronic properties of these defects have been studied …
-
Large-Scale Characterization of Quantum Emitters in High-Purity Diamond
Solid state quantum memories, such as color centers in diamond, are a leading platform for the distribution of quantum information. Quantum repeaters will require many qubit registers at every quantum network node, each with long-lived spin states and high-quality single photon emissions. Here, we …
-
Coherent Processes in Rare-Earth-Ion-Doped Solids
… a number of coherent processes, such as quantum information processing, superradiance and electromagnetically induced transparency, which have been experimentally implemented using rare-earth-ion-doped crystals. The rare-earths are a class of elements that have in common, an atomic …
-
CORRELATED PHOTON PAIRS AND MULTIPHOTON STATES FROM A COLD ATOMIC ENSEMBLE
… neutral atom systems and realizing distributed quantum networks. This thesis presents the realization and characterization of a high-brightness, temporally correlated photon-pair source at near-resonant wavelengths of 780 nm and 795 nm in an optically dense cold <sup>87</sup>Rb ensemble. The …
-
Frequency down-conversion for quantum networking with nitrogen-vacancy centers in diamond
Quantum frequency conversion (QFC) devices are critical to building long-distance quantum networks, which would connect quantum memories located at distant nodes through optical channels for efficient entanglement distribution. The nitrogen-vacancy (NV) center in diamond is an attractive candidate …
-
Design of Efficient Acoustic Interfaces for Quantum Emitters in Diamond
Solid-state atomic defects--known as quantum emitters--in diamond are a valuable technology for quantum networking and computing due to their optically active transitions that interface on-chip systems with flying photons as well as their long-lived spin transitions that function as quantum …
-
Super-resolution localization and readout of individual solid-state qubits
A central goal in quantum information science is to establish entanglement across multiple quantum memories in a manner that allows individual control and readout of each constituent qubit. In the area of solid state quantum optics, a leading system is the negatively charged nitrogen vacancy center …
-
Quantum acoustics with a released thickness-mode mechanical resonator
The circuit quantum acoustodynamics (cQAD) platform integrates the strong nonlinearity of superconducting Josephson elements with high-quality mechanical resonators, enabling potential applications in quantum memories, transducers, and sensors. A central challenge in this field is achieving strong …
-
Nanoscale engineering of spin-based quantum devices in diamond
The development of quantum technologies from the bottom-up requires engineering and control at the level of single quanta. In this thesis, we explore the engineering of a particular quantum system: optically active defects in diamond, known as color centers. Color centers have a variety of …
-
Optical cavity integrated surface ion trap for enhanced light collection
… qubits that can be transmitted to connect remote quantum systems. Single photons transmitted from two remote sites, each entangled with one quantum memory, can be used to entangle distant quantum memories by interfering on a beam splitter. Efficient remote entanglement generation relies upon …
Page 1 of 2