Deterministic generation of a bit-stream of single-photon pulses

Law, C. K.; Kimble, H. J.

doi:10.1080/09500349708231869

Cited by 170 publications

(170 citation statements)

References 19 publications

Supporting

Mentioning

168

Contrasting

Order By: Relevance

“…The measured data is in very good agreement with a perturbative calculation of the coupling strengthg between |f 0 D and |g1 D . Our calculations show that the strength of the Raman transition is reduced in comparison to the one implemented in a Λ level system [23,27] by the destructive interference between the two second order transition paths which couple |f 0 D and |g1 D . We also determined the fidelity of the swap operation which utilized the cavity-assisted Raman process, by both numerical and analytical means.…”

Section: Discussionmentioning

confidence: 82%

Microwave-induced amplitude- and phase-tunable qubit-resonator coupling in circuit quantum electrodynamics

et al. 2015

View full text Add to dashboard Cite

In the circuit quantum electrodynamics architecture, both the resonance frequency and the coupling of superconducting qubits to microwave field modes can be controlled via external electric and magnetic fields to explore qubit -photon dynamics in a wide parameter range. Here, we experimentally demonstrate and analyze a scheme for tuning the coupling between a transmon qubit and a microwave resonator using a single coherent drive tone. We treat the transmon as a three-level system with the qubit subspace defined by the ground and the second excited states. If the drive frequency matches the difference between the resonator and the qubit frequency, a Jaynes-Cummings type interaction is induced, which is tunable both in amplitude and phase. We show that coupling strengths of about 10 MHz can be achieved in our setup, limited only by the anharmonicity of the transmon qubit. This scheme has been successfully used to generate microwave photons with controlled temporal shape [Pechal et al., Phys. Rev. X 4, 041010 (2014)] and can be directly implemented with superconducting quantum devices featuring larger anharmonicity for higher coupling strengths.

show abstract

Section: Discussionmentioning

confidence: 82%

Microwave-induced amplitude- and phase-tunable qubit-resonator coupling in circuit quantum electrodynamics

et al. 2015

View full text Add to dashboard Cite

show abstract

“…This is possible with cavity QED systems, as has been discussed by Refs. [20][21][22]. In addition, in order to perform a successful conditional measurement, the photodiode needs to have a time resolution better than 1/ω m .…”

Section: Practical Considerationsmentioning

confidence: 99%

Open quantum dynamics of single-photon optomechanical devices

et al. 2013

View full text Add to dashboard Cite

We study the quantum dynamics of a Michelson interferometer with Fabry-Perot cavity arms and one movable end mirror, and driven by a single photon-an optomechanical device previously studied by Marshall et al. as a device that searches for gravity decoherence. We obtain an exact analytical solution for the system's quantum mechanical equations of motion, including details about the exchange of the single photon between the cavity mode and the external continuum. The resulting time evolution of the interferometer's fringe visibility displays interesting new features when the incoming photon's frequency uncertainty is narrower or comparable to the cavity's line width-only in the limiting case of much broader-band photon does the result return to that of Marshall et al., but in this case the photon is not very likely to enter the cavity and interact with the mirror, making the experiment less efficient and more susceptible to imperfections. In addition, we show that in the strong-coupling regime, by engineering the incoming photon's wave function, it is possible to prepare the movable mirror into an arbitrary quantum state of a multidimensional Hilbert space.

show abstract

“…Because of the general validity of these results, we will first state and prove them without referring to any particular physical system. This will be then applicable to all sequential setups, like streams of photonic qubits emitted either by a cavity QED (CQED) source [4,5] or by a quantum dot coupled to a microcavity [6,7].…”

mentioning

confidence: 99%

Sequential Generation of Entangled Multiqubit States

et al. 2005

View full text Add to dashboard Cite

We consider the deterministic generation of entangled multiqubit states by the sequential coupling of an ancillary system to initially uncorrelated qubits. We characterize all achievable states in terms of classes of matrix-product states and give a recipe for the generation on demand of any multiqubit state. The proposed methods are suitable for any sequential generation scheme, though we focus on streams of single-photon time-bin qubits emitted by an atom coupled to an optical cavity. We show, in particular, how to generate familiar quantum information states such as W, Greenberger-Horne-Zeilinger, and cluster states within such a framework. For this purpose, a lot of effort has been made in recent years to develop efficient and deterministic single-photon sources [4 -7].Photonic multiqubit states can be generated by letting a source emit photonic qubits in a sequential manner [8]. If we do not initialize the source after each step, the created qubits will be, in general, entangled. Moreover, if we allow for specific operations inside the source before each photon emission, we will be able to create different multiqubit states at the output. In fact, this is a particular instance of a general sequential generation scheme, where an ancillary system is coupled in turn to a number of initially uncorrelated qubits.It is the purpose of this Letter to provide a complete characterization of all multipartite quantum states achievable within a sequential generation scheme. It turns out that the classes of states attainable with increasing resources are exactly given by the hierarchy of so-called matrix-product states (MPS) [9,10]. These states typically appear in the theory of one-dimensional spin systems [11], as they are the variational set over which density matrix renormalization group techniques are carried out [12]. Thus, our analysis stresses the importance of MPS, since we show that they naturally appear in a completely different and relevant physical context. Moreover, particular instances of lowdimensional MPS, like cluster states [13] or GreenbergerHorne-Zeilinger (GHZ) states [14], are a valuable resource in quantum information [15]. Conversely, we will provide a recipe for the generation on demand of any multiqubit state within a sequential generation scheme. Because of the general validity of these results, we will first state and prove them without referring to any particular physical system. This will be then applicable to all sequential setups, like streams of photonic qubits emitted either by a cavity QED (CQED) source [4,5] or by a quantum dot coupled to a microcavity [6,7].In the second part, we will focus on the physical implementation of these ideas within the realm of CQED. The role of the ancillary system will be performed by a D-level atom coupled to a single mode of an optical cavity. The sequentially generated qubits will be time-bin qubits j0i and j1i, describing the absence and presence of a photon emitted from the cavity in a certain time interval (see Fig. 1).We will concentrate on setups...

show abstract

Deterministic generation of a bit-stream of single-photon pulses

Cited by 170 publications

References 19 publications

Microwave-induced amplitude- and phase-tunable qubit-resonator coupling in circuit quantum electrodynamics

Microwave-induced amplitude- and phase-tunable qubit-resonator coupling in circuit quantum electrodynamics

Open quantum dynamics of single-photon optomechanical devices

Sequential Generation of Entangled Multiqubit States

Contact Info

Product

Resources

About