Quantum signaling in cavity qed connecting repositories. Finally, we study the continuous transition from the quantum to the classical limit of cavity qed. For that, you need a more basic level book in qft, where the very. Apr 17, 2003 possible realization of entanglement, logical gates, and quantum information transfer with superconducting quantum interferencedevice qubits in cavity qed chuiping yang and shihi chu department of chemistry, university of kansas, lawrence, kansas 66045 and kansas center for advanced scienti. As in the field of cavity quantum electrodynamics, a single photon within a single mode cavity coherently couples to a quantum object atom. Optical approaches to quantum information processing and quantum computing. Modern experiments qnd measurements on photons and photon blockade are discussed and.
Jonsson, 1eduardo martnmart nez, 1,2 3 and achim kempf,2 3 4 1department of applied mathematics, university of waterloo, 200 university avenue w. 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. Superadiabatic holonomic quantum computation in cavity qed. Cavity quantum electrodynamics request pdf researchgate. Introductory textbook for cavity quantum electrodynamics. Quantum computing with cavity qed the university of new mexico. We give a brief overview of cavity qed and its roles in quantum information science. In cavity qed one is able to prepare quantum states for the electromagnetic field stored in a resonant cavity. Cavity quantum electrodynamics an overview sciencedirect. A onedimensional transmission line resonator in circuit qed acting as quantum data bus generates a common cavity mode and interacts with each cpb. In particular, we discuss setups in optical cavity qed, where either atoms serve as stationary qubits, or photons serve as flying qubits. Cavity qed in a molecular ion trap university of chicago. This text arose in the course of the hauptseminar experimentelle quantenoptik in ws 2010 at the tu kaiserslautern, organized by prof. Feb 01, 2010 we theoretically present a scheme to realize the scalable geometric quantum computing with cooperpair box cpb qubits in circuit qed.
Lectures on quantum mechanics graduate level textbook. A solidstate quantum computer based on localized electron spins as qubits is therefore of potential interest. We present a concise but complete conceptual treatment of quantum computing implemented with cavity quantum. Algorithmic aspects of quantum computing cpsc 489504 689604 course information, fall 2001 instructor. Apr 28, 2000 we propose a scheme for quantum computing using highq cavities in which the qubits are represented by single cavity modes restricted in the space spanned by the two lowest fock states. In this article basic ideas of quantum computing qc using cavity quantum electrodynamics. Recent activity in this area has pioneered powerful new approaches to the study of. An optical system like cavity qed may have some advantage on this problem, therefore we consider a quantum computation based on cavity qed.
Implementations of quantum computing using cavity quantum. A cavityqed scheme for clusterstate quantum computing using. Strong interactions of single atoms and photons in cavity qed. The electronic spin degrees of freedom in semiconductors typically have decoherence times that are several orders of magnitude longer than other relevant time scales. Quantum memory is used for storage of the photon qubits. In this work, we address the prospects of cavity qed with respect to system control and coherent e. In this work, we propose a scheme to realize qis of an arbitrary twoatom state. Hekking, in macroscopic quantum coherence and quantum computing, edited by d. Cavity quantum electrodynamics with andersonlocalized modes. Kimble norman bridge laboratory of physics 1233, california institute of technology, pasadena, ca 91125 abstract. Feb 07, 20 iiiv quantum light source and cavityqed on silicon.
In the optical version of cqed 2,schematicallyshowninfig. Cavity qed approaches quantum information processing quantum. Among the implementation of hardware design for quantum computing such as cavity qed, ion trap, nuclear magnetic resonance, quantum dots, and superconducting systems, cavity qed is one of the most promising schemes because the basic interaction within cavity qed is the vacuum rabi oscillation and the strong coupling of cavity field and atom. Cavity quantum electrodynamics for superconducting. In particular, ions can be loaded easily into deep rf traps and are held independent of their internal state. But if you learn griffiths completely, and also have knowledge of special relativity, in principle you can start with qft. 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. Quantum information science and technology roadmapping. Circuit qed is a novel onchip realization of cavity qed. 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. Solid state approaches to quantum information processing and quantum computing. Typically, cqed devices are engineered so that the qubits primarily couple to a single cavity mode.
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 discuss approaches for manipulating quantum information and performing. It could in principle be used to construct a quantum computer. Cavity quantum electrodynamics an overview sciencedirect topics. In order to access the quantum and the classical regimes we control and sense the thermal photon number in the cavity over. An introduction to quantum computing using cavity qed concepts. Cavity quantum electrodynamics cavity qed is the study of the interaction between light confined in a reflective cavity and atoms or other particles, under. Theory paper on soft quantum matter in multimode cavity qed published in. Decoherence, continuous observation, and quantum computing. Cavity qed with superconducting circuits coherent quantum mechanics with individual photons and qubits basic approach. We present a concise but complete conceptual treatment of quantum computing implemented with cavity quantum electrodynamics cqed. Scalable architectures have also been suggested using these gates. Dec 03, 2004 cavity quantum electrodynamics addresses a fascinating question in physics.
Code information in simple systems atoms, photons and use state superpositions and entanglement to. Iv the case where the cavity and qubit are tuned in resonance and in sec. Here, a scheme that realizes controlled interactions between two distant quantum dot spins is proposed. Pdf scalable quantum computation with cavity qed systems. The quantum coupling is provided by strong atom cavity interaction. Feb 19, 2021 to create such photon and to process the information they carry, cavity qed has a great potential to exploit. Quantum computing on multiatomic ensembles in quantum electrodynamics cavity.
Cavity quantum electrodynamics qed with insitu tunable interactions is important for developing novel systems for quantum simulation and computing. In this talk, we shall first give a brief overview of the subject and then discuss the implementation of quantum logic gates in cavity qed systems. Pdf quantum computing on multiatomic ensembles in quantum. Strong coupling circuit qed quantum nonlinearities in. 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. Cavity qed approaches quantum information processing. Quantum computing employs the principle of coherent superposition and quantum entanglement to solve certain problems much faster than on a conventional computer.
Griffiths is an absolutely basic level book in qm, while qed is a part of quantum field theory qft. Experiments on atoms in cavities can be described by elementary models but reveal intriguing subtleties of the interplay of coherent dynamics with external couplings. Quantum information splitting of an arbitrary twoatom. Cavity qed and quantum computation in the weak coupling. Scalable geometric quantum computing with cooperpair box. Individual trapped atoms for cavity qed quantum information applications a thesis presented to the academic faculty by kevin m. Toward scalable quantum computation with cavity qed systems. Cavity quantum electrodynamics with andersonlocalized. A coherence preservation control strategy in cavity qed. We show how decoherence affects the computation, and methods to prevent it. This enables eavesdropper to use optimal photon number attack to determine the key.
The ability to tune the dispersive shifts of a cavity qed system provides more functionality for performing either quantum measurements or logical manipulations. Quantum information splitting of an arbitrary twoatom state. Mar 02, 2020 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. The result is a design for quantum computation that provides the potential for a high density of quantum information stor age and processing.
Quantum information processing in cavityqed springerlink. A number of cavity quantum electrodynamics qed based schemes for implementing quantum information processing and communication have been suggested. Fn the coherent interaction between light and matter in the context of cavity quantum electrodynamics cavity qed has been under intensive study in recent. Pdf quantum information processing using quantum dot. Nov 15, 2002 modern cavity quantum electrodynamics cavity qed illuminates the most fundamental aspects of coherence and decoherence in quantum mechanics. The qubits are transferred in two pairs of processing nodes blue and green pairs for realization of single and two qubit gates. Jun 05, 2017 adiabatic quantum control is a powerful tool for quantum engineering and a key component in some quantum computation models, where accurate control over the timing of the involved pulses is not needed. Iiiv quantum light source and cavityqed on silicon. Research article a coherence preservation control strategy. It offers the possibility to realize an exceptionally strong coupling between arti. Exotic quantum states of circuit quantum electrodynamics in the. Scheme of quantum computer based on multiatomic ensembles in single mode qed cavity coupled with external flying photon qubits. Pdf quantum information processing using quantum dot spins.
As an approximate model we realize it as the n atoms taviscummings hamiltonian interacting with n external laser. Possible realization of entanglement, logical gates, and. It is to this cavity qed circus with nying photons, falling qubits, and fantastic. 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. Cavity quantum electrodynamics for superconducting electrical. The basic building blocks of a quantum computer are quantum logic gates. Before cavity qed, you have to first learn basic qed. Pdf encoded universality of quantum computations on the.
Cavity qed, possibly in combination with optical dipole traps, is the most promising technique for realizing an interface between different carriers of quantum information, implemented either with freespace atoms emitting photons in a random direction probabilistic approach, or with atoms in highfinesse cavities where the strong atomphoton. V the case of large detuning which leads to lifetime enhancement of the qubit. Vi, a quantum nondemolition readout protocol is presented. Cavity qed quantum computing schemes are scalable to a relatively large number of qubits represented by single atoms placed in an optical cavity. I want to give a short introduction also from the theoretical point of view to the fascinating field of cavity quantum electrodynamics cqed. Quantum information science and technology roadmapping project.
Realization of onequbit logical operations is discussed. So far, cavity qed experiments have been realized with a wide range of twolevel systems, including atoms 3, ions 4, cooperpair boxes 5, and. This architecture is attractive both as a macroscopic analog of atomic physics experiments and for quantum computing and control, since it. In this scope, the warburton group in basel developed a gated semiconductor quantum dot strongly coupled to an optical micro cavity. Individual trapped atoms for cavity qed quantum information. Computing with quantum logic a quantum gate couples two qubits through a conditional unitary operation if a is true, then do b. In addition to demonstrating dramatic changes in spontaneous emission, cavity qed has led to the creation of new kinds of microscopic masers that operate with a single atom and a few photons or with photons emitted in pairs in a twophoton.
Specifically, this method uses an en semble of spectrally resolved atoms in a spectral hole burn ing solid. A coherence preservation control strategy in cavity qed based. 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 networks based on cavity qed 1 introduction no. Quantum information processing and measurement in circuit. Recently, multiatom entangled states, such as the ghz states 18, the w states 19 and the cluster states 20 have been exploited for carrying out teleportation in cavity qed systems. Circuit quantum electrodynamics circuit qed provides a means of studying the fundamental interaction between light and matter quantum optics. However, the adiabatic condition requires that the process be very slow and thus limits its application in quantum computation, where quantum gates are preferred to be fast due to the limited. Our achievement is an important step towards the physical implementation of cavity qedbased distributed quantum computation and a. The qubits are transferred in two pairs of processing nodes blue and green pairs for.
Cavity qed and quantum computation in the weak coupling regime. Observation of dressed states of distant atoms with delocalized. Highcontrast qubit interactions using multimode cavity qed. Drive the qubitresonator system in the fardetuned regime, but close to the cavity resonance frequency. Quantum information processing in cavityqed request pdf.
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