Interfacing microwave qubits and optical photons via spin ensembles

Blum, Susanne; O’Brien, Christopher; Lauk, Nikolai; Bushev, Pavel; Fleischhauer, Michael; Morigi, Giovanna

doi:10.1103/physreva.91.033834

Cited by 56 publications

(54 citation statements)

References 59 publications

(101 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These circuits operate at microwave frequencies while longdistance communication is performed with light in the optical band. Enabling superconducting quantum information processors to communicate on a large-scale quantum network will therefore require the quantumcoherent conversion of microwaves to optical frequencies and vice versa [3][4][5][6][7][8][9][10][11]. Converting quantum information contained in photons with one frequency to photons with another also has potential applications to efficient atom-photon coupling [12], fast quantum gates [13,14], measurement schemes [15,16], astronomy [17], frequency standards [17,18], and quantum computing [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…In these approaches the conversion is mediated by, respectively, a nano-mechanical resonator [7][8][9][23][24][25][26][27][28], an ensemble of trapped atoms [10,11,[29][30][31], and an ensemble of spins in a solid (e.g., NV-centers in diamond) [32][33][34][35][36]. A number of experiments have already demonstrated proof-ofprinciple conversion between microwaves and optical frequencies using a nano-mechanical system [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microwave-to-optical frequency conversion using a cesium atom coupled to a superconducting resonator

et al. 2017

View full text Add to dashboard Cite

A candidate for converting quantum information from microwave to optical frequencies is the use of a single atom that interacts with a superconducting microwave resonator on one hand and an optical cavity on the other. The large electric dipole moments and microwave transition frequencies possessed by Rydberg states allow them to couple strongly to superconducting devices. Lasers can then be used to connect a Rydberg transition to an optical transition to realize the conversion. Since the fundamental source of noise in this process is spontaneous emission from the atomic levels, the resulting control problem involves choosing the pulse shapes of the driving lasers so as to maximize the transfer rate while minimizing this loss. Here we consider the concrete example of a cesium atom, along with two specific choices for the levels to be used in the conversion cycle. Under the assumption that spontaneous emission is the only significant source of errors, we use numerical optimization to determine the likely rates for reliable quantum communication that could be achieved with this device. These rates are on the order of a few Mega-qubits per second.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microwave-to-optical frequency conversion using a cesium atom coupled to a superconducting resonator

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Based on this effective interaction, we discuss two quantum state conversion protocols, i.e., a double-swap protocol and a dark-state scheme. Different from the previous works [29][30][31][32][33], here we introduce a dark mode of the collective spin excitations, and propose an adiabatic conversion approach with this dark mode. We show that the conversion process is extremely robust against spin dissipations, as the dark mode is decoupled from the collective spin excitations.…”

Section: Introductionmentioning

confidence: 99%

Quantum microwave-optical interface with nitrogen-vacancy centers in diamond

Zhou

et al. 2017

Phys. Rev. A

View full text Add to dashboard Cite

We propose an efficient scheme for a coherent quantum interface between microwave and optical photons using nitrogen-vacancy (NV) centers in diamond. In this setup, an NV center ensemble is simultaneously coupled to an optical and a microwave cavity. We show that, by using the collective spin excitation modes as an intermediary, quantum states can be transferred between the microwave cavity and the optical cavity through either a double-swap scheme or a dark-state protocol. This hybrid quantum interface may provide interesting applications in single microwave photon detections or quantum information processing.

show abstract

“…Since the molecule is embedded in a waveguide, the shift can lead to measurable effects even for light pulses containing few photons. This is a major advantage over existing hybrid proposals that requires strong optical fields [2,14,26,28,31,[36][37][38][39][40][41][42], which will lead to decoherence due to quasiparticles created by photon absorption [43].…”

mentioning

confidence: 99%

Interfacing Superconducting Qubits and Single Optical Photons Using Molecules in Waveguides

et al. 2017

View full text Add to dashboard Cite

We propose an efficient light-matter interface at optical frequencies between a single photon and a superconducting qubit. The desired interface is based on a hybrid architecture composed of an organic molecule embedded inside an optical waveguide and electrically coupled to a superconducting qubit placed near the outside surface of the waveguide. We show that high fidelity, photon-mediated, entanglement between distant superconducting qubits can be achieved with incident pulses at the single photon level. Such a low light level is highly desirable for achieving a coherent optical interface with superconducting qubit, since it minimizes decoherence arising from the absorption of light. 42.50.Ex, 85.25.Cp Rapid progress in engineering and control of their physical properties, have made superconducting (SC) qubits, one of the most promising candidates for future quantum processors [1][2][3][4]. If such processors are connected together into a quantum internet [5], it would allow immense applications ranging from secure communication over long distances [6][7][8] to distributed quantum computation [9][10][11] and advanced protocols for distributed sensing and atomic clocks [12]. Quantum communication over long distances can, however, only be accomplished through optical means making it a necessity to build light-matter interfaces at optical frequencies [5,13]. This has stimulated immense interest in devising ways of efficiently coupling optical photons to SC systems [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Tremendous success have been achieved in coupling photons to SC qubit at microwave frequencies [30,31], while in the optical domain, only limited indirect coupling has been achieved using transducers [32][33][34]. Coherent coupling of quantum fields at optical frequencies to a SC system thus remains an outstanding challenge. A principle obstacle to this is the large mismatch between the energy scales of an optical photon (∼ 1 eV) and a SC qubit (∼ 100 µeV) [30] making the absorption of even a single optical photon a major disturbance for a SC system. In fact such effects are used in SC detectors for detection of optical photons [35]. To suppress such disturbances it is therefore highly desirable to keep the number of optical photons to a minimum.In this letter we propose a scheme to interface optical photons with a SC qubit at light levels involving only a single or a few photons. To achieve this we introduce a hybrid solidstate architecture depicted in Fig. 1(a) comprising, a molecule embedded in an optical waveguide with a SC qubit fabricated near its surface (∼ 100 − 500 nm). In comparison to the magnetic coupling considered previously [23-25, 31, 36-41], a key feature of our scheme is the electric coupling between the molecule and SC qubit. The coupling strength can then be orders of magnitude stronger thus allowing for strong coupling in the system. As the SC qubit we consider a Cooper pair box (CPB) where the two quantum states are defined by a single Cooper pair being on each o...

show abstract

Interfacing microwave qubits and optical photons via spin ensembles

Cited by 56 publications

References 59 publications

Microwave-to-optical frequency conversion using a cesium atom coupled to a superconducting resonator

Microwave-to-optical frequency conversion using a cesium atom coupled to a superconducting resonator

Quantum microwave-optical interface with nitrogen-vacancy centers in diamond

Interfacing Superconducting Qubits and Single Optical Photons Using Molecules in Waveguides

Contact Info

Product

Resources

About