We give a brief overview of cavity qed and its roles in quantum information science. The principal obstacle to quantum information processing with many qubits is decoherence. Recent activity in this area has pioneered powerful new approaches to the study of. Schoelkopf1 1departments of physics and applied physics, yale university, new haven, connecticut 06520, usa 2department of physics, indiana university, bloomington, indiana. Traditionally, quantum chemistry investigates molecular systems assuming that the photon field, which leads to the interaction of charged particles, is well approximated by the coulomb interaction.
Circuit cavity quantum electrodynamics cqed using superconducting resonators and josephson junction based qubits has demonstrated the essential building blocks of gate based quantum computing and quantum optics 1. Mar 12, 2010 the interaction between a single photon and a single quantized emitter is the core of cavity quantum electrodynamics qed and constitutes a node in a quantum information network 1, 2. Circuit qed is a novel onchip realization of cavity qed. Cavity quantum electrodynamics scientific american. In this work, we address the prospects of cavity qed with respect to system control and coherent e. Dissipationassisted quantum computation in atomcavity. The subject of quantum computing brings together ideas from classical information theory, computer science, and quantum physics. Circuit quantum electrodynamics circuit qed, and the closely related field of cavity quantum electrodynamics cavity qed, are growing areas of modern theoretical and experimental physics which have found a range of exciting applications from the construction of nascent quantum computers to the study of fundamental quantum. Cavity quantum electrodynamics an overview sciencedirect. The operations can be efficiently implemented using.
Such systems are of great interest in the study of the fundamental quantum mechanics of open systems, the engineering of quantum states, and measurementinduced decoherence and have also been proposed as possible. Building blocks for modular circuit qed quantum computing to order a book, go to christopher james axline, ph. Pdf we present a concise but complete conceptual treatment of quantum computing implemented with cavity quantum electrodynamics cqed. It could in principle be used to construct a quantum computer. Carmichael1 1department of physics, university of auckland, private bag 92019, auckland, new zealand. Richard feynman and yuri manin later suggested that a quantum computer had the potential to simulate things that a classical computer could not. Pdf an introduction to quantum computing using cavity. Cavity quantum electrodynamics with andersonlocalized.
Pdf superadiabatic holonomic quantum computation in cavity qed. Indeed, it was in lightmatter interactions between single atoms and photons in optical cavities, a research field known as cavity quantum electrodynamics qed, that physicists saw the earliest. Information can be identified as the most general thing which must propagate from a cause to an effect. On the other hand, quantum optics describe the photon field in detail while approximating the matter systems via few levels. Before cavity qed, you have to first learn basic qed. Quantum information processing and quantum optics with. Quantum computation using circuit cavity qed phys 576, winter 2007. Band, yshai avishai, in quantum mechanics with applications to nanotechnology and information science, 20. Code information in simple systems atoms, photons and use state superpositions and entanglement to. The introduction of concepts from cavity quantum electrodynamics to superconducting circuits yielded circuit quantum electrodynamics, a platform eminently suitable to quantum information. Cavity quantum electrodynamics cavity qed is the study of the interaction between light confined in a reflective cavity and atoms or other particles, under conditions where the quantum nature of light photons is significant. Experiments on atoms in cavities can be described by elementary models but reveal intriguing subtleties of the interplay of coherent dynamics with external couplings.
Dec 03, 2004 cavity quantum electrodynamics addresses a fascinating question in physics. Cavity quantum electrodynamics with andersonlocalized modes. Jonsson, 1eduardo martnmart nez, 1,2 3 and achim kempf,2 3 4 1department of applied mathematics, university of waterloo, 200 university avenue w. We present a concise but complete conceptual treatment of quantum computing implemented with cavity quantum electrodynamics cqed. Schoelkopf1 1departments of physics and applied physics, yale university, new haven, connecticut 06520, usa 2department of physics, indiana university, bloomington, indiana 47405, usa. Strong coupling circuit qed quantum nonlinearities in. Oct 09, 2012 cavity qed processes engender an intimate correlation between the states of the atom and those of the field, and so their study provides new insights into quantum aspects of the interaction.
Solid state approaches to quantum information processing and quantum computing. In this paper we treat a cavity qed quantum computation. Quantum information and cavity qed principle of cavity qed experiments. So far, cavity qed experiments have been realized with a wide range of twolevel systems, including atoms, ions, cooperpair boxes, and semiconductor quantum dots. In particular, we discuss setups in optical cavity qed, where either atoms serve as stationary qubits, or photons serve as flying qubits. But if you learn griffiths completely, and also have knowledge of special relativity, in principle you can start with qft. Computing with quantum logic a quantum gate couples two qubits through a conditional unitary operation if a is true, then do b. In cavity qed one is able to prepare quantum states for the electromagnetic field stored. Pellizzari t, gardiner s a, cirac j i and zoller p 1995 decoherence, continuous observation, and quantum computing. One source of decoherence is spontaneous emission which causes loss of. Quantum computing began in the early 1980s, when physicist paul benioff proposed a quantum mechanical model of the turing machine.
Individual trapped atoms for cavity qed quantum information applications a thesis presented to the academic faculty by kevin m. We show how to implement quantum gates and networks using highq cavities in which the qubits are represented by single cavity modes restricted in the space spanned by the two lowest fock states. The interaction between a single photon and a single quantized emitter is the core of cavity quantum electrodynamics qed and constitutes a node in a quantum information network 1, 2. An introduction to quantum computing using cavity qed. Aug 04, 2003 based on resonant atomic interactions with classical fields and dispersive couplings with quantized cavity fields we discuss schemes for the implementation of certain quantum computing algorithms. We then discuss schemes to implement several important quantum algorithms such as the discrete quantum fourier transform qft algorithm and grovers quantum search algorithm based on. Superconducting quantum circuit qed for quantum computing. Cavity quantum electrodynamics 4 and ion trap experiments 5 are ideally suited for these experiments. The quantum cavity qed system is adopted as a typical example to illustrate the merits, where the proposed scheme can be realized in a tripod configuration by appropriately controlling the pulse. Oct 26, 2015 quantum computing neutral atoms, molecules and cavity qed a. Griffiths is an absolutely basic level book in qm, while qed is a part of quantum field theory qft. Possible schemes to implement the basic quantum gates for quantum computation have been presented based on cavity quantum electrodynamics qed systems. Muti cavity operations in circuit quantum electrodynamics.
In cavity qed one is able to prepare quantum states for. Sep 28, 2017 creating practical solidstate, quantum computers that operate at roomtemperature is a challenging task. In particular we discuss implementations of grovers algorithm and the quantum fourier transform. Quantum information processing in cavityqed springerlink. Both implement a simple quantum system, made up of a single twolevel system a spin12 strongly interacting with a mesoscopic quantum oscillator a spring. Proposed realization of the dickemodel quantum phase transition in an optical cavity qed system f. Teleported operations between logical qubits in circuit quantum electrodynamics. This site is like a library, use search box in the widget to get ebook that you want. Qed quantum electrodynamics an overview sciencedirect. Pdf scalable quantum computation with cavity qed systems.
Universal quantum computing with arbitrary continuousvariable encoding 6. Cavity quantum electrodynamics addresses a fascinating question in physics. It could in principle be used to construct a quantum computer the case of a single 2level atom in the cavity is mathematically described by the jaynescummings. Nov 15, 2002 modern cavity quantum electrodynamics cavity qed illuminates the most fundamental aspects of coherence and decoherence in quantum mechanics. Cavity quantum electrodynamics for superconducting. Based on cavity qed of free atoms, we theoretically investigate the implementation of a threequbit quantum phase gate in which the three qubits are represented by the photons in modes of the cavity. Cavity quantum electrodynamics for superconducting electrical.
Roomtemperature cavity quantum electrodynamics with strongly. Quantum signaling in cavity qed connecting repositories. Muticavity operations in circuit quantum electrodynamics. An introduction to quantum computing using cavity qed concepts by zachary burell. Neutral atoms and molecules provide a promising test bed for the development of scalable general purpose quantum processors, and for quantum simulators as special purpose quantum computers involving a very large number of qubits. Moreover, all proposals for quantum computation using atoms interacting via a common cavity mode 19 require that the atoms are trapped in the cavity in a. We then discuss schemes to implement several important quantum algorithms such as the discrete quantum fourier transform qft algorithm and grovers quantum search algorithm based on these. For cqed, which is analogous to the conventional optical cavityqed, the quantum trajectory approach seems the most natural choice 1214, 19, 20.
Cavity qed approaches quantum information processing quantum. Cavity qed approaches quantum information processing. Highcontrast qubit interactions using multimode cavity qed. Pra 82, 043612 2010 university of virginia condensed matter seminar feb 3, 2011. An introduction to quantum computing using cavity qed concepts. Quantum gates and networks with cavity qed systems.
The paper is intended as a brief overview for professionals who are coming over to the field from other areas and who may have not discussed the concepts behind quantum computing during their technical training. Optical approaches to quantum information processing and quantum computing. Introduction to measurement based quantum computation. Proposed realization of the dickemodel quantum phase. Namely, we consider a model of quantum computation based on n atoms of lasercooled and trapped linearly in a cavity and realize it as the n atoms taviscummings hamiltonian interacting with n external laser fields. Quantum bayesian rule for weak measurements of qubits in. Scalable architectures have also been suggested using these gates. Individual trapped atoms for cavity qed quantum information. Modern cavity quantum electrodynamics cavity qed illuminates the most fundamental aspects of coherence and decoherence in quantum mechanics. Measurementbased quantum computation with mechanical oscillators related talks. Quantum computing on multiatomic ensembles in quantum electrodynamics cavity. Monitoringthedecoherenceofmesoscopicquantumsuperpositions. With the aid of a modelbuilding approach, readers discover the answer to this question and come to appreciate its important applications in computing, cryptography. Quantum information processing in cavityqed request pdf.
From optical to solid state systems superconducting quantum circuits and nanomechanical systems aprial 4, tue 16. Quantum computation roadmap quantum information science. This is because stored information is readily destroyed by thermal noise. It offers the possibility to realize an exceptionally strong coupling between arti. Atoms and molecules in cavities, from weak to strong. A number of cavity quantum electrodynamics qed based schemes for implementing quantum information processing and communication have been suggested. Cavity quantum electrodynamics cqed studies the properties of atoms coupled to discrete photon modes in high q cavities. So far, cavity qed experiments have been realized with a wide range of twolevel systems, including atoms 3, ions 4, cooperpair boxes 5, and. Cavity quantum electrodynamics download ebook pdf, epub. We solve the schr\\ odinger equation of the model in the weak coupling regime to construct the. Cavity quantum electrodynamics for superconducting electrical circuits.
Click download or read online button to get cavity quantum electrodynamics book now. Isolating qubits from their environment maintain addressability of qubits reading out the state of qubits coupling qubits to each other converting stationary qubits to flying qubits what is this good for. An architecture for quantum computation alexandre blais,1 renshou huang,1,2 andreas wallraff,1 s. Strongly coupled cavity qed systems show great promise for coherent processing of quantum information in the contexts of quantum computing, communication and cryptography. Introductory textbook for cavity quantum electrodynamics. Oct 19, 2004 possible schemes to implement the basic quantum gates for quantum computation have been presented based on cavity quantum electrodynamics qed systems.
722 558 535 988 1268 441 529 296 101 1452 747 1161 66 147 1379 1432 658 1504 938 1336 1437 1508 253 956 1258 487 105 825 651 108 1443 69 264 1477 77 717 778 1463 362 722 577