Quantum state transfer and controlled-phase gate on one-dimensional superconducting resonators assisted by a quantum bus

Hua, Ming; Tao, Ming‐Jie; Deng, Fu‐Guo

doi:10.1038/srep22037

“…As it is well known, superconductors are materials characterised for low losses and better operating characteristics than normal metals. Nowadays, they are regarded as promising quantum materials, widely used in quantum computing networks 20 – 23 , quantum simulators 24 , 25 , loss-less microwave resonators 26 , and AC Josephson junction lasers 27 . Superconductors used as building blocks for PCs fabrication have mainly two advantages over traditional materials.…”

Section: Introductionmentioning

confidence: 99%

Experimental realisation of tunable ferroelectric/superconductor $$({\text {B}} {\text {T}} {\text {O}}/{\text {Y}} {\text {B}}{\text {C}} {\text {O}})_{{\text {N}}}/{\text {S}}{\text {T}}{\text {O}}$$ 1D photonic crystals in the whole visible spectrum

González

¹

,

Ordoñez

²

,

Melo-Luna

³

et al. 2020

Sci Rep

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Emergent technologies that make use of novel materials and quantum properties of light states are at the forefront in the race for the physical implementation, encoding and transmission of information. Photonic crystals (PCs) enter this paradigm with optical materials that allow the control of light propagation and can be used for optical communication, and photonics and electronics integration, making use of materials ranging from semiconductors, to metals, metamaterials, and topological insulators, to mention but a few. Here, we show how designer superconductor materials integrated into PCs fabrication allow for an extraordinary reduction of electromagnetic waves damping, making possible their optimal propagation and tuning through the structure, below critical superconductor temperature. We experimentally demonstrate, for the first time, a successful integration of ferroelectric and superconductor materials into a one-dimensional (1D) PC composed of (BTO/YBCO) N /STO bilayers that work in the whole visible spectrum, and below (and above) critical superconductor temperature T C = 80 K. Theoretical calculations support, for different number of bilayers N, the effectiveness of the produced 1D PCs and may pave the way for novel optoelectronics integration and information processing in the visible spectrum, while preserving their electric and optical properties. The use of electromagnetic (EM) waves as information carriers for communication systems has been in place for many years 1,2 ; as such, EM wavelengths make possible the transmission over large distances but, at the same time, they limit the amount of information they can convey by their frequency: the larger the carrier frequency, the larger the available transmission bandwidth and thus the information-carrying capacity of the communication system 3. For this reason, quantum artificial nanostructured materials such as photonic crystals that are able to transmit at high frequencies and that concentrate the available power within the transmitted electromagnetic wave, thus giving an improved system performance, are desired 4. PCs are artificial periodic structures characterised by a periodic variation of the refractive index with a consequent periodic spatial variation of the dielectric constant, which may be tailored to control light properties 4. They, therefore, allow the appearance of defined frequency ranges and address the issue of forbidden/allowed propagation of electromagnetic waves. As a consequence, the control and tunability of PCs opens a new perspective for information processing and technological

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“…Many physical systems such as spin chain [1,7,6], Josephson-junction array [14], quantum dots [15,16], coupled cavities [3,8,17,18], photonic lattices [19,20], etc have been investigated to realize quantum state transfer. Possibility in precise control of resonance frequencies and coupling strengths of the array, coupled cavities provides a suitable physical system to realize controlled quantum state transfer [3,8,17,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Perfect Quantum State Transfer in Glauber-Fock Cavity Array

Meher

¹

2019

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We study transfer of single photon in an one-dimensional finite Glauber-Fock cavity array whose coupling strengths satisfy a square root law. The evolved state in the array can be mapped to an upper truncated coherent state if the cavities are resonant. Appropriate choices of resonance frequencies provide perfect transfer of a photon between any two cavities in the array. Perfect transfer of the photon allows perfect quantum state transfer between the cavities. Our findings may help in realizing quantum communication and information processing in photonic lattices.

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“…As it is well known, superconductors are materials characterised for low losses and better operating characteristics than normal metals. Nowadays, they are considered as promising quantum materials, widely used in quantum computing networks [22][23][24][25] , quantum simulators 26,27 , loss-less microwave resonators 28 , and AC Josephson junction lasers 29 . Superconductors used as building blocks for PCs fabrication have mainly two advantages over traditional ones.…”

Section: Introductionmentioning

confidence: 99%

Experimental realisation of tunable ferroelectric/superconductor (BTO/YBCO)N/STO 1D photonic crystals in the whole visible spectrum

González,

Ordoñez,

Melo-Luna

et al. 2019

Preprint

0

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Emergent technologies that make use of novel materials and quantum properties of light states are at the forefront in the race for the physical implementation, encoding and transmission of information. Photonic crystals (PCs) enter this paradigm with optical materials that allow the control of light propagation and can be used for optical communication 1 , and photonics and electronics integration 2,3 making use of materials ranging from semiconductors 4 , to metals 5 , metamaterials 6 , and topological insulators 7 , to mention but a few. In particular, here we show how designer superconductor materials integrated into PCs fabrication allow for an extraordinary reduction of electromagnetic waves damping and possibilitate their optimal propagation and tuning through the structure, below critical superconductor temperature. We experimentally demonstrate, for the first time, a successful integration of ferroelectric and superconductor materials into a one-dimensional (1D) PC composed of (BTO/YBCO)N/STO bilayers that work in the whole visible spectrum, and below (and above) critical superconductor temperature (measured in the 10-300 K range). Theoretical calculations support, for different number of bilayers N , the effectiveness of the produced 1D PCs and pave the way for novel optoelectronics integration and information processing in the visible spectrum at low temperature, while preserving their electric and optical properties.

show abstract

Quantum state transfer and controlled-phase gate on one-dimensional superconducting resonators assisted by a quantum bus

Cited by 14 publications

References 73 publications

Experimental realisation of tunable ferroelectric/superconductor $$({\text {B}} {\text {T}} {\text {O}}/{\text {Y}} {\text {B}}{\text {C}} {\text {O}})_{{\text {N}}}/{\text {S}}{\text {T}}{\text {O}}$$ 1D photonic crystals in the whole visible spectrum

Experimental realisation of tunable ferroelectric/superconductor $$({\text {B}} {\text {T}} {\text {O}}/{\text {Y}} {\text {B}}{\text {C}} {\text {O}})_{{\text {N}}}/{\text {S}}{\text {T}}{\text {O}}$$ 1D photonic crystals in the whole visible spectrum

Perfect Quantum State Transfer in Glauber-Fock Cavity Array

Experimental realisation of tunable ferroelectric/superconductor (BTO/YBCO)N/STO 1D photonic crystals in the whole visible spectrum

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