Identification of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Λ</mml:mi></mml:math>-like systems in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mtext>Er</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo>:</mml:mo><mml:msub><mml:mtext>Y</mml:mtext><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>SiO</mml:mtext></mml:mrow><mml:mn>5</mml:mn></mml:msub>

Baldit, E.; Bencheikh, Kamel; Monnier, P.; Briaudeau, S.; Levenson, Juan Ariel; Crozatier, V.; Lorgeré, I.; Bretenaker, Fabien; Gouët, J.-L. Le; Guillot-Noël, O.; Goldner, Philippe

doi:10.1103/physrevb.81.144303

Cited by 50 publications

(40 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ultimately, RE ion doped crystals with better coherence properties are required. For instance, crystals predominantly doped with RE isotopes with non-zero nuclear spin ( 167 Er or 143 Nd) features T 2 100 µs [25,28], while maintaining sufficient optical depth [45]. Even longer coherence times of the hyperfine transitions are attained by operating the microwave memory at a clock transition [46,47], where the spin's precession frequency is to first order insensitive to magnetic field fluctuations.…”

mentioning

confidence: 99%

Microwave multimode memory with an erbium spin ensemble

et al. 2015

View full text Add to dashboard Cite

Hybrid quantum system combining circuit QED with spin doped solids are an attractive platform for distributed quantum information processing. There, the magnetic ions serve as coherent memory elements and reversible conversion elements of microwave to optical qubits. Among many possible spin-doped solids, erbium ions offer the unique opportunity of a coherent conversion of microwave photons into the telecom C-band at 1.54 µm employed for long distance communication. In our work, we perform a time-resolved electron spin resonance study of an Er 3+ :Y2SiO5 spin ensemble at milli-Kelvin temperatures and demonstrate multimode storage and retrieval of up to 16 coherent microwave pulses. The memory efficiency is measured to be 10 −4 at the coherence time of T2 = 5.6 µs. We observe a saturation of the spin coherence time below 50mK due to full polarization of the surrounding electronic spin bath.A future quantum communication technology will combine three basic types of subsystems: Transmission channels, repeater stations and information processing nodes [1,2]. Similarly to classical communication networks, photons propagating through optical fiber channels are ideal for carrying quantum states over long distances and distribute entanglement between information processing nodes [3]. These computational nodes or quantum processors may be realized by employing single atomic or macroscopic solid-state systems. Among a plethora of solid state devices, superconducting (SC) qubits are one of the most promising building blocks for a future quantum computer [4]. Many ground breaking experiments have recently been demonstrated with SC qubits including the measurement of long coherence and relaxation times of up to 0.1 ms [5], coherent operation of up to three-qubit processors [6], the implementation of a deterministic two-qubit gate [7] and the realization of a basic surface code for fault tolerant computing [8]. These qubits operate at microwave frequencies and cryogenic temperatures. In order to embed them into the emerging quantum optical internet technology a coherent interface between optical and microwave photons is required [9].Ensembles of rare-earth (RE) ions doped into a crystal are a suitable system for coherent photon conversion between optical and microwave frequency bands [10][11][12]. Such RE doped crystals are currently at the forefront of quantum communication research, where many thrilling achievements such as the demonstration of a quantum memory at the optical telecom C-band [13], high efficiency storage of optical photons [14], generation of entanglement between two RE doped crystals [15] and quantum teleportation between a telecom O-band photon (1.34 µm) and a RE doped crystal [16] have been reported. Also, RE doped crystals are considered to have a great potential as a multimode optical memory element in a future quantum repeater technology [17], and storage and retrieval of 64 temporal optical modes at the single photon level has been demonstrated [18].A crucial step towards the development of a microwav...

show abstract

mentioning

confidence: 99%

Microwave multimode memory with an erbium spin ensemble

et al. 2015

View full text Add to dashboard Cite

show abstract

“…ions present a hyperfine structure due to 167 Er 3+ isotope, which allows one to identify Λ-type level structures for storage [44]. These features make such crystals very promising for implementation of the cavityassisted Raman scheme.…”

Section: +mentioning

confidence: 99%

Multimode cavity-assisted quantum storage via continuous phase-matching control

Калачев

Kocharovskaya

2013

Phys. Rev. A

View full text Add to dashboard Cite

A scheme for spatial multimode quantum memory is developed such that spatial-temporal structure of a weak signal pulse can be stored and recalled via cavity-assisted off-resonant Raman interaction with a strong angular-modulated control field in an extended Λ-type atomic ensemble. It is shown that effective multimode storage is possible when the Raman coherence spatial grating involves wave vectors with different longitudinal components relative to the paraxial signal field. The possibilities of implementing the scheme in the solid-state materials are discussed.

show abstract

“…1(b). These could be either a collection of NV − centers in diamond [23] or rare earth ion crystal such as Er 3+ ions in Y 2 SiO 5 [24,25]. Each spin system consists of three levels: the optical excited state |r j , and two electronic ground states |g j and |e j .…”

mentioning

confidence: 99%

“…In the dispersive regime, these optical transitions form a Raman transition between the two ground states |g j and |e j , which is also arranged to dispersively couple to the flux qubit. Such optical Λ−type configuration has been demonstrated in both ensemble of NV − centers [23], and Er 3+ host crystals [24,27,28]. The diamond crystal chip is synthesized with (001) surface orientation such that the magnetic field generated by the flux qubit has a component orthogonal to the principal (z) axes of the NV centers [17].…”

mentioning

confidence: 99%

Solid-state optical interconnect between distant superconducting quantum chips

Xia

Twamley

2015

Phys. Rev. A

View full text Add to dashboard Cite

We propose a design for a quantum interface exploiting the electron spins in crystals to swap the quantum states between the optical and microwave. Using sideband driving of a superconducting flux qubit and a combined cavity/solid-state spin ensemble Raman transition, we demonstrate how a stimulated Raman adiabatic passage (STIRAP)-type operation can swap the quantum state between a superconducting flux qubit and an optical cavity mode with a fidelity higher than 90%. We further consider two distant superconducting qubits with their respective interfaces joined by an optical fiber and show a quantum transfer fidelity exceeding 90% between the two distant qubits.PACS numbers: 42.50. Ct, 85.25.Am, 03.67.Hk, 03.67.Lx Superconducting qubits (SQs) are one of the most promising technologies for delivering a quantum computer which will operate within a single superconducting chip [1]. Linking remotely distant superconducting chips via an optical data bus thus opens the door for a quantum internet [2][3][4][5][6]. To permit the optical networking of superconducting quantum chips [1], a coherent quantum interconnect between microwave and optical quantum information as a building block has been developed theoretically and experimentally [7][8][9][10][11][12][13]. One way to achieve this interlinking is to find a method to convert quantum information held within superconducting circuits into quantum information held in optical photons within one node (or interface), then transmit the photons over an optical fibre, and finally reconvert the photonic quantum information back into the target distant superconducting chip.Researchers have recently focused much effort towards devising such a quantum interface, interconverting electromagnetic radiation at different frequencies using either optomechanical quantum systems [7][8][9][10][11]13], or ensemble of ultracold atoms [12]. Although solid-state electronic ensembles have been experimentally demonstrated to be capable of coherent exchange with superconducting circuits [14][15][16][17], only two proposals for a solid-state hybrid quantum interface have been proposed very recently [18,19], and one more abstract scheme for quantum state transfer between two remote NV centers [7]. Experimental progress in magneto-optic frequency conversion exploiting optomechanical resonators has been demonstrated for classical signals [20,21]. We have recently described a design for a magneto-optomechanical quantum interface for and detailed how it can achieve high transfer fidelities between distant flux qubits [13]. All of the published proposals so far are technically challenging, using either optomechanical/magneto-optomechanical systems, or ensembles of trapped atoms in proximity to cryogenic superconducting circuits except [19].In this Letter we show how such an interconversion between microwave and optical quantum information and a quantum internet can be achieved through a solid-state electronic spin ensemble which catalyses the coupling between the flux qubit and photonic cavity mode.W...

show abstract

Identification ofΛ-like systems inEr3+:Y2SiO5

Cited by 50 publications

References 14 publications

Microwave multimode memory with an erbium spin ensemble

Microwave multimode memory with an erbium spin ensemble

Multimode cavity-assisted quantum storage via continuous phase-matching control

Solid-state optical interconnect between distant superconducting quantum chips

Contact Info

Product

Resources

About