Laser written circuits for quantum photonics

Meany, Thomas; Gräfe, Markus; Heilmann, René; Pérez-Leija, Armando; Gross, Simon; Steel, M. J.; Withford, Michael J.; Szameit, Alexander

doi:10.1002/lpor.201500061

Cited by 208 publications

(161 citation statements)

References 137 publications

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“…In particular, due to the flexibility of waveguide array writing with fs lasers [197], this platform could enable the observation of linear and nonlinear effects in modulated PT structures.…”

Section: Modulated Latticesmentioning

confidence: 99%

Nonlinear switching and solitons in PT‐symmetric photonic systems

Suchkov

Sukhorukov

Huang

et al. 2016

Laser & Photonics Reviews

346

267

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One of the challenges of the modern photonics is to develop all-optical devices enabling increased speed and energy efficiency for transmitting and processing information on an optical chip. It is believed that the recently suggested ParityTime (PT) symmetric photonic systems with alternating regions of gain and loss can bring novel functionalities. In such systems, losses are as important as gain and, depending on the structural parameters, gain compensates losses. Generally, PT systems demonstrate nontrivial non-conservative wave interactions and phase transitions, which can be employed for signal filtering and switching, opening new prospects for active control of light. In this review, we discuss a broad range of problems involving nonlinear PT-symmetric photonic systems with an intensitydependent refractive index. Nonlinearity in such PT symmetric systems provides a basis for many effects such as the formation of localized modes, nonlinearly-induced PT-symmetry breaking, and all-optical switching. Nonlinear PT-symmetric systems can serve as powerful building blocks for the development of novel photonic devices targeting an active light control.

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Section: Modulated Latticesmentioning

confidence: 99%

Nonlinear switching and solitons in PT‐symmetric photonic systems

Suchkov

Sukhorukov

Huang

et al. 2016

Laser & Photonics Reviews

346

267

View full text Add to dashboard Cite

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“…These attractive features have also enabled advanced experiments and applications of quantum optics and quantum information processing, with many demonstrations using telecommunication-industry-standard Tiindiffused LiNbO 3 waveguides, e.g. see [3][4][5][6][7][8][9] and references therein. Moreover, the ability to combine many components onto a single substrate is required for the implementation of an integrated quantum information processing node that performs local operations, interconnects, and measurements for quantum-secured computing and communications [10].…”

mentioning

confidence: 99%

Properties of a Rare-Earth-Ion-Doped Waveguide at Sub-Kelvin Temperatures for Quantum Signal Processing

et al. 2017

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We characterize the 795 nm 3 H6 to 3 H4 transition of Tm 3+ in a Ti 4+ :LiNbO3 waveguide at temperatures as low as 800 mK. Coherence and hyperfine population lifetimes -up to 117 µs and 2.5 hours, respectively -exceed those at 3 K at least ten-fold, and are equivalent to those observed in a bulk Tm 3+ :LiNbO3 crystal under similar conditions. We also find a transition dipole moment that is equivalent to that of the bulk. Finally, we prepare a 0.5 GHz-bandwidth atomic frequency comb of finesse >2 on a vanishing background. These results demonstrate the suitability of rare-earthdoped waveguides created using industry-standard Ti-indiffusion in LiNbO3 for on-chip quantum applications.PACS numbers: 42.50. Md, 42.82.Gw, 42.50.Gy, 32.70.Cs Integrated optics offers the possibility of scalable manipulation of light due to small guiding volume, chip size, ever-improving fabrication methods, and low loss [1,2]. These attractive features have also enabled advanced experiments and applications of quantum optics and quantum information processing, with many demonstrations using telecommunication-industry-standard Tiindiffused LiNbO 3 waveguides, e.g. see [3][4][5][6][7][8][9] and references therein. Moreover, the ability to combine many components onto a single substrate is required for the implementation of an integrated quantum information processing node that performs local operations, interconnects, and measurements for quantum-secured computing and communications [10]. For example, a chip containing multiplexed sources of entangled photon pairs, Bell-state analyzers, photon number-resolving nondestructive photon detection, and feed-forward qubit-mode translation and selection, e.g. using frequency shifts or on-demand quantum memories, could pave the way to the development of a practical quantum repeater [9,11,12]. A promising avenue to this end, and to quantum information processing in general, is based on qubit interfaces using rare-earth-ion-doped (REI-doped) crystals at cryogenic temperatures [3,5,[12][13][14][15][16]. Consequently, the development of rare-earth-ion-doped waveguides constitutes an exciting and important path towards applications.Many ground-breaking quantum optics experiments, in particular quantum memory for light [13][14][15][16], are based on cryogenically-cooled REIs doped into a variety of bulk crystals. However, work employing REI-doped crystalline waveguides has, until only the past year, been restricted to LiNbO 3 -generally doped with thulium -into which waveguides were fabricated by means of titanium indiffusion [3,5,9,12,17]. A likely explanation for the lack of investigations using other REIs in Ti 4+ :LiNbO 3 is that an earlier low-temperature characterization of -all of which guide light in unperturbed regions of the REI-doped crystal. While the results are promising, it is still unclear how the waveguide fabrication process affects the relevant REI properties for quantum applications and if good properties can be retained using industry-standard Ti-indiffusion in LiNbO 3 .To investi...

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“…This idea represents a rather general paradigm that encompasses and extends previous approaches towards similar goals in one-dimensional photonic environments [11,12]. Using the tools in this paper we can reverse-engineer arbitrary bipartite interactions, such as high-dimensional XY spin Hamiltonians, finding the optical circuits that implement them, and rely on reconfigurable circuits [7] or single-purpose devices [5,6] to implement them.…”

Section: Discussionmentioning

confidence: 91%

“…They can be found at a variety of scales, from classical circuits built using macroscopic lenses and mirrors [1,2], to photonic crystals that achieve routing and confinement by means of nanostructuring a metamaterial [3,4], on-chip waveguides [5], waveguides imprinted using femtosecond pulses [6] or reconfigurable optical microchips [7,8].…”

Section: Introductionmentioning

confidence: 99%

Quantum simulation with a boson sampling circuit

et al. 2016

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In this work we study a system that consists of 2M matter qubits that interact through a boson sampling circuit, i.e., an M -port interferometer, embedded in two different architectures. We prove that, under the conditions required to derive a master equation, the qubits evolve according to effective bipartite XY spin Hamiltonians, with or without local and collective dissipation terms. This opens the door to the simulation of any bipartite spin or hard-core boson models and exploring dissipative phase transitions as the competition between coherent and incoherent exchange of excitations. We also show that in the purely dissipative regime this model has a large number of exact and approximate dark states, whose structure and decay rates can be estimated analytically. We finally argue that this system may be used for the adiabatic preparation of boson sampling states encoded in the matter qubits.

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Laser written circuits for quantum photonics

Cited by 208 publications

References 137 publications

Nonlinear switching and solitons in PT‐symmetric photonic systems

Nonlinear switching and solitons in PT‐symmetric photonic systems

Properties of a Rare-Earth-Ion-Doped Waveguide at Sub-Kelvin Temperatures for Quantum Signal Processing

Quantum simulation with a boson sampling circuit

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