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Building Efficient Light Matter Interfaces For Quantum Systems
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Book Synopsis Building Efficient Light-matter Interfaces for Quantum Systems by : Tsung-Ju Jeff Lu
Download or read book Building Efficient Light-matter Interfaces for Quantum Systems written by Tsung-Ju Jeff Lu and published by . This book was released on 2015 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 potentially world-record photon collection from quantum dots. This technique can also be applied to NVs in diamond in the near future. Also, the NV- charged state has second-scale coherence times at room temperature that make it a promising candidate for solid state memories in quantum computers and quantum repeaters. NV- is an individually addressable qubit system that can be optically initialized, manipulated, and measured. On-chip entanglement generation would be the basis of scalability for quantum information processing technologies. These properties have enabled recent demonstrations of heralded quantum entanglement and teleportation between two separated NV centers. To improve the entanglement probability in such schemes, it is imperative to improve the efficiency with which single photons from a NV center can be guided into a low-loss single-mode waveguide. As such, a second component of this thesis focuses on the development of a photonic integrated circuit based on aluminum nitride that would incorporate pre-selected, long-lived NV center quantum memories as well as pre-selected, high-performance superconducting nanowire single-photon detectors (SNSPDs). This hybrid device would have the capability to perform on-chip entanglement of photons from separate quantum memories to build up a quantum repeater necessary for long-distance quantum communication and distributed quantum computing.
Book Synopsis Strong Light-matter Coupling by : Leong Chuan Kwek
Download or read book Strong Light-matter Coupling written by Leong Chuan Kwek and published by World Scientific. This book was released on 2013-12-23 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics of strong light-matter coupling has been addressed in different scientific communities over the last three decades. Since the early eighties, atoms coupled to optical and microwave cavities have led to pioneering demonstrations of cavity quantum electrodynamics, Gedanken experiments, and building blocks for quantum information processing, for which the Nobel Prize in Physics was awarded in 2012. In the framework of semiconducting devices, strong coupling has allowed investigations into the physics of Bose gases in solid-state environments, and the latter holds promise for exploiting light-matter interaction at the single-photon level in scalable architectures. More recently, impressive developments in the so-called superconducting circuit QED have opened another fundamental playground to revisit cavity quantum electrodynamics for practical and fundamental purposes. This book aims at developing the necessary interface between these communities, by providing future researchers with a robust conceptual, theoretical and experimental basis on strong light-matter coupling, both in the classical and in the quantum regimes. In addition, the emphasis is on new forefront research topics currently developed around the physics of strong light-matter interaction in the atomic and solid-state scenarios.
Book Synopsis A Versatile Source of Light-matter Quantum States Based on Laser-cooled Atoms by : Pau Farrera Soler
Download or read book A Versatile Source of Light-matter Quantum States Based on Laser-cooled Atoms written by Pau Farrera Soler and published by . This book was released on 2018 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum information is a fascinating field that studies situations in which information is encoded as quantum states. This encoding is affected by quantum physical effects (such as superposition or entanglement) and its study has led to exciting discoveries from both fundamental and applied perspectives. An interesting system within this field is a quantum light-matter interface, able to interface quantum states encoded in light and those encoded in matter. These systems can combine the long distance transmission advantage of photonic states with the storage and processing capabilities of matter states. The main goal of this thesis was to develop a quantum light-matter interface able to distribute the photonic state to other interfaces based on different platforms. This versatility could open new possibilities that combine the advantages of the different platforms. In this thesis we studied the challenges to make these hybrid connections possible and we performed two examples of such connections. Our quantum light-matter interface is based on a cloud of Rubidium atoms that are laser-cooled in a magneto-optical trap. We operate the atomic system using the Duan-Lukin-Cirac-Zoller scheme in order to generate pairs consisting on a single photon and an atomic collective spin excitation (so-called spin-wave). Spin-waves can later be mapped efficiently into a second single photon, which allows for synchronization capabilities. We use this scheme to generate different types of quantum states, such as heralded on-demand single photons and photonic qubits, photon-photon correlated states, or entanglement between photonic and atomic qubits. Firstly, we studied two capabilities needed in order to perform the mentioned hybrid connections: the frequency and temporal tunability of the photonic states. In the first one we studied the frequency conversion of the single photons paired with spin-waves in the atomic medium. We could convert their wavelength from 780 nm to 1550 nm using a nonlinear crystal waveguide, while still showing quantum statistics of the field. In the second one we showed a temporal tunability of the single photons with durations ranging from around 10 ns to 10 us. The studied statistics of the fields indicate that the photons are close to Fourier-transform-limited, allowing for photon bandwidth tunability. In the third work we studied the generation of a light-matter entangled state in which the photonic state is encoded as a time-bin qubit. Two key ingredients enabled this experiment: a magnetic-field-induced atomic dephasing that allows to create spin-waves in two distinguishable temporal qubit modes, and largely imbalanced Mach-Zehnder interferometers that enabled the qubit analysis. Photonic time-bin encoding has the advantages of low decoherence in optical fibers and direct suitability for frequency conversion. Finally, we took advantage of these studied capabilities in order to transfer photonic quantum states generated by our laser-cooled atomic system to two different types of light-matter interfaces. The first one was a laser-cooled Rubidium cloud able to transfer single photons into Rydberg excitations. We showed that the quantum statistics of our photonic fields are preserved after the Rydberg storage, which represents a first step for future studies of quantum nonlinear effects using the long range Rydberg interaction. The second one was a crystal doped with Praseodymium ions. In this work the photonic quantum state transfer happened between systems with different atomic species, being a truly hybrid example that was enabled by quantum frequency conversion. These results show a quantum light-matter interface where the properties of the photonic states can be tuned for an optimal interaction with other matter platforms. The proof-of-principle photonic quantum state transfers to the Rydberg and doped-crystal systems open the way to study new experiments that combine advantages of different platforms.
Book Synopsis Solid-state light-matter interfaces on the quantum test bench by : Christoph Clausen
Download or read book Solid-state light-matter interfaces on the quantum test bench written by Christoph Clausen and published by . This book was released on 2013 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantum Simulations with Photons and Polaritons by : Dimitris G. Angelakis
Download or read book Quantum Simulations with Photons and Polaritons written by Dimitris G. Angelakis and published by Springer. This book was released on 2017-05-03 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews progress towards quantum simulators based on photonic and hybrid light-matter systems, covering theoretical proposals and recent experimental work. Quantum simulators are specially designed quantum computers. Their main aim is to simulate and understand complex and inaccessible quantum many-body phenomena found or predicted in condensed matter physics, materials science and exotic quantum field theories. Applications will include the engineering of smart materials, robust optical or electronic circuits, deciphering quantum chemistry and even the design of drugs. Technological developments in the fields of interfacing light and matter, especially in many-body quantum optics, have motivated recent proposals for quantum simulators based on strongly correlated photons and polaritons generated in hybrid light-matter systems. The latter have complementary strengths to cold atom and ion based simulators and they can probe for example out of equilibrium phenomena in a natural driven-dissipative setting. This book covers some of the most important works in this area reviewing the proposal for Mott transitions and Luttinger liquid physics with light, to simulating interacting relativistic theories, topological insulators and gauge field physics. The stage of the field now is at a point where on top of the numerous theory proposals; experiments are also reported. Connecting to the theory proposals presented in the chapters, the main experimental quantum technology platforms developed from groups worldwide to realize photonic and polaritonic simulators in the laboratory are also discussed. These include coupled microwave resonator arrays in superconducting circuits, semiconductor based polariton systems, and integrated quantum photonic chips. This is the first book dedicated to photonic approaches to quantum simulation, reviewing the fundamentals for the researcher new to the field, and providing a complete reference for the graduate student starting or already undergoing PhD studies in this area.
Book Synopsis Narrowband Single Photons for Light-Matter Interfaces by : Markus Rambach
Download or read book Narrowband Single Photons for Light-Matter Interfaces written by Markus Rambach and published by Springer. This book was released on 2018-08-28 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a step-by-step guide on how to construct a narrowband single photon source for the integration with atom-based memory systems. It combines the necessary theoretical background with crucial experimental methods and characterisations to form a complete handbook for readers at all academic levels. The future implementation of large quantum networks will require the hybridisation of photonic qubits for communication with quantum memories in the context of information storage. Such an interface requires carefully tailored single photons to ensure compatibility with the chosen memory. The source itself is remarkable for a number of reasons, including being the spectrally narrowest and brightest source of its kind; in addition, it offers a novel technique for frequency stabilisation in an optical cavity, together with exceptional portability. Starting with a thorough analysis of the current literature, this book derives the essential parameters needed to design the source, describes its individual components in detail, and closes with the characterisation of a single photon source.
Book Synopsis Nanoscale Quantum Optics by : M. Agio
Download or read book Nanoscale Quantum Optics written by M. Agio and published by IOS Press. This book was released on 2020-10-07 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the launch of the Quantum Technology Flagship Programme by the European Commission, developments in the realization of new technologies based on quantum physics have been recognized as a priority. These are important for cryptographic techniques for telecommunications security, new computing hardware that can solve problems so far inaccessible even to the latest generation of supercomputers, and precision standards and sensors with important applications ranging from materials science to medical diagnostics. This book presents a collection of lectures from the International School of Physics Enrico Fermi on Nanoscale Quantum Optics, held in Varenna, Italy, from 23 – 28 July 2018. The course was attended by 60 students, researchers and lecturers, and provided an opportunity to train a new generation of scientists on topics that promise great innovations in science and technology. Included here are 9 lectures and seminars and 3 poster contributions from the school. Subjects covered include: basic concepts for quantum optics and quantum technologies; materials for quantum nanophotonics; quantum optics and non-classical light generation; creating quantum correlations between quantum-dot spins; platforms for telecom-entangled photon sources; nanoscale sensing and quantum coherence; and nano-optomechanics, among others. The book offers a valuable overview of the state-of-the-art and current trends in nanoscale quantum optics. It will be invaluable for all those with an interest in this subject.
Book Synopsis Light-Matter Interactions and Quantum Optics by : Jonathan Keeling
Download or read book Light-Matter Interactions and Quantum Optics written by Jonathan Keeling and published by . This book was released on 2014-08-28 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regarding the positive aims of this course, they are: to discuss how tomodel the quantum behaviour of coupled light and matter; to introducesome simple models that can be used to describe such systems; to dis-cuss methods for open quantum systems that arise naturally in the contextof coupled light and matter; and to discuss some of the more interestingphenomena which may arise for matter coupled to light. Semiclassical be-haviour will be discussed in some sections, both because an understandingof semiclassical behaviour (i.e. classical radiation coupled to quantum me-chanical matter) is useful to motivate what phenomena might be expected;and also as comparison to the semiclassical case is important to see whatnew physics arises from quantised radiation.
Author :National Academies of Sciences, Engineering, and Medicine Publisher :National Academies Press ISBN 13 :0309499542 Total Pages :315 pages Book Rating :4.3/5 (94 download)
Book Synopsis Manipulating Quantum Systems by : National Academies of Sciences, Engineering, and Medicine
Download or read book Manipulating Quantum Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-09-14 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of atomic, molecular, and optical (AMO) science underpins many technologies and continues to progress at an exciting pace for both scientific discoveries and technological innovations. AMO physics studies the fundamental building blocks of functioning matter to help advance the understanding of the universe. It is a foundational discipline within the physical sciences, relating to atoms and their constituents, to molecules, and to light at the quantum level. AMO physics combines fundamental research with practical application, coupling fundamental scientific discovery to rapidly evolving technological advances, innovation and commercialization. Due to the wide-reaching intellectual, societal, and economical impact of AMO, it is important to review recent advances and future opportunities in AMO physics. Manipulating Quantum Systems: An Assessment of Atomic, Molecular, and Optical Physics in the United States assesses opportunities in AMO science and technology over the coming decade. Key topics in this report include tools made of light; emerging phenomena from few- to many-body systems; the foundations of quantum information science and technologies; quantum dynamics in the time and frequency domains; precision and the nature of the universe, and the broader impact of AMO science.
Book Synopsis Light-Matter Interactions, Quantum Memories, and Atom-Photon Gates by : G. P. Teja
Download or read book Light-Matter Interactions, Quantum Memories, and Atom-Photon Gates written by G. P. Teja and published by . This book was released on 2024-02-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea of a classical computer is well known to us. A computer in its rudimentary form is a device that takes information in terms of classical bits, performs logic gates on the bits and yields output-bits. Whereas a quantum computer (QC) uses two-level quantum systems (qubits) for computation. In QC's the qubits are typically initialized in a desired state or a superposition state. Then unitary rotations (gate-operations) are applied and finally the output states are measured. A variety of systems are being explored to realize a practical quantum computer e.g. superconducting qubits (SQ) [1, 2], trapped ions [3], Rydberg atoms [4], quantum dots [5, 6] and photonic systems [7, 8]. The physical systems that act as qubits are realized using the various degrees of freedom of the system, e.g. energy levels of atoms and ions, charge states in quantum dots and the charge and flux states of SQ. The initialization, gate operations and readout of the qubits are performed using light-matter interactions. For photonic qubits polarization can be used for encoding a qubit. Such encoding is ideal for communication, as the polarization qubits doesn't have a bath. But the two-qubit gate operations are difficult with polarization qubits, as photons do not interact easily. For quantum computation with photons, the qubits are encoded in an infinite-dimensional harmonic oscillator [9], and the gate operations are performed using beams splitters, phase shifters, homodyne detectors and number resolving detectors.
Book Synopsis Strong Light-matter Coupling: From Atoms To Solid-state Systems by : Leong-chuan Kwek
Download or read book Strong Light-matter Coupling: From Atoms To Solid-state Systems written by Leong-chuan Kwek and published by World Scientific. This book was released on 2013-12-23 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics of strong light-matter coupling has been addressed in different scientific communities over the last three decades. Since the early eighties, atoms coupled to optical and microwave cavities have led to pioneering demonstrations of cavity quantum electrodynamics, Gedanken experiments, and building blocks for quantum information processing, for which the Nobel Prize in Physics was awarded in 2012. In the framework of semiconducting devices, strong coupling has allowed investigations into the physics of Bose gases in solid-state environments, and the latter holds promise for exploiting light-matter interaction at the single-photon level in scalable architectures. More recently, impressive developments in the so-called superconducting circuit QED have opened another fundamental playground to revisit cavity quantum electrodynamics for practical and fundamental purposes.This book aims at developing the necessary interface between these communities, by providing future researchers with a robust conceptual, theoretical and experimental basis on strong light-matter coupling, both in the classical and in the quantum regimes. In addition, the emphasis is on new forefront research topics currently developed around the physics of strong light-matter interaction in the atomic and solid-state scenarios.
Author :National Academies of Sciences, Engineering, and Medicine Publisher :National Academies Press ISBN 13 :030947969X Total Pages :273 pages Book Rating :4.3/5 (94 download)
Book Synopsis Quantum Computing by : National Academies of Sciences, Engineering, and Medicine
Download or read book Quantum Computing written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-04-27 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum mechanics, the subfield of physics that describes the behavior of very small (quantum) particles, provides the basis for a new paradigm of computing. First proposed in the 1980s as a way to improve computational modeling of quantum systems, the field of quantum computing has recently garnered significant attention due to progress in building small-scale devices. However, significant technical advances will be required before a large-scale, practical quantum computer can be achieved. Quantum Computing: Progress and Prospects provides an introduction to the field, including the unique characteristics and constraints of the technology, and assesses the feasibility and implications of creating a functional quantum computer capable of addressing real-world problems. This report considers hardware and software requirements, quantum algorithms, drivers of advances in quantum computing and quantum devices, benchmarks associated with relevant use cases, the time and resources required, and how to assess the probability of success.
Book Synopsis Quantum Network with Multiple Cold Atomic Ensembles by : Bo Jing
Download or read book Quantum Network with Multiple Cold Atomic Ensembles written by Bo Jing and published by Springer Nature. This book was released on 2022-03-16 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the novel research in quantum memory networking, especially quantum memories based on cold atomic ensembles. After discussing the frontiers of quantum networking research and building a DLCZ-type quantum memory with cold atomic ensemble, the author develops the ring cavity enhanced quantum memory and demonstrates a filter-free quantum memory, which significantly improves the photon-atom entanglement. The author then realizes for the first time the GHZ-type entanglement of three separate quantum memories, a building block of 2D quantum repeaters and quantum networks. The author also combines quantum memories and time-resolved measurements, and reports the first multiple interference of three single photons with different colors. The book is of good reference value for graduate students, researchers, and technical personnel in quantum information sciences.
Book Synopsis Interfaces Between Light and Matter for Quantum Information Processing by : Nils Trautmann
Download or read book Interfaces Between Light and Matter for Quantum Information Processing written by Nils Trautmann and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Principles of Nano-Optics by : Lukas Novotny
Download or read book Principles of Nano-Optics written by Lukas Novotny and published by Cambridge University Press. This book was released on 2012-09-06 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully revised and in its second edition, this standard reference on nano-optics is ideal for graduate students and researchers alike.
Book Synopsis A Quantum Light-matter Interface with Rydberg Polaritons in a Cold Atomic Ensemble by : Emanuele Distante
Download or read book A Quantum Light-matter Interface with Rydberg Polaritons in a Cold Atomic Ensemble written by Emanuele Distante and published by . This book was released on 2017 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atom-light Interfaces for Quantum Information Processing by : Jesse Llewellyn Everett
Download or read book Atom-light Interfaces for Quantum Information Processing written by Jesse Llewellyn Everett and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emergence of quantum physics from the page to the lab and the world at large is an exciting development of recent years. The prospects of absolutely secure communication and efficient simulation of physical systems have spurred great human effort into understanding these possibilities and turning them into realities. Photons are the most easily manipulated quantum particles and are a promising candidate for implementing these technologies. Limitations of photons include the difficulty of keeping objects that move at the speed of light, and producing strong interactions between particles that do not normally interact. The work presented in this thesis is motivated by the possibility of overcoming these limitations. The ability to faithfully store and reproduce a quantum state is essential for many quantum information technologies. Quantum memories for light have been developed over the last two decades to provide this ability. The group at the Australian National University developed the gradient echo memory (GEM): A quantum state of light can be controllably stored and released from an atomic ensemble by the use of additional optical fields and magnetic field gradients. This scheme was previously shown to preserve the quantum characteristics of the light. We used the GEM scheme with a cold rubidium ensemble to create the first optical memory that simultaneously beat the no-cloning limit, a benchmark for many of the technologies relying on quantum memories, and the loss rate for a delay line composed of optical fibre. We also created an analogue to a pulsed optical resonator using GEM with a warm rubidium vapour. This was done by replacing the circulating optical field of a resonator with light stored in the memory, and replacing the coupling of light into and out of that circulating mode with storage and recall from the memory. The bandwidth and repetition rate of this resonator were rapidly tunable as they were controlled by external optical and magnetic fields. We worked on implementing GEM with strings of thousands of atoms strongly coupled to the evanescent field of an optical nanofibre. This raised new possibilities for creating a true random access memory that would allow a more flexible use of the multi-mode capacity of GEM. We developed the theory for a novel type of stationary light in the gradient echo memory. Our stationary light scheme relies on the destructive interference of counter-propagating optical fields throughout the memory. The optical intensity scales with optical depth, as with other forms of stationary light. However, as the destructive interference could be set up over a much greater distance, more of the optical depth is available for generating stationary light. Finally, we studied how a control-phase gate for single-photon optical states could be implemented using a nonlinear interaction with stationary light. The stationary light generated by one state modulates the phase of another state stored in the memory. The second state modifies the stationary light, also producing a back-action on the first state and generating the required cross-phase shift.
