Satellite‐based distribution of hybrid entanglement

Do, Hung; Malaney, Robert; Green, Jonathan

doi:10.1002/que2.60

Cited by 13 publications

(7 citation statements)

References 58 publications

(155 reference statements)

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“…In such schemes, the use of the TMSV entangled teleportation channel (a CV channel) can be utilized as the resource to teleport the DV qubit state [80], and so our proposed scheme operates directly. Our scheme also operates directly on more complex quantum states such as hybrid DV-CV entangled states -even on both components of such states [81]. This flexibility of CV entanglement channels over DV entanglement channels is another advantage offered by our scheme.…”

Section: A Other Quantum States and Operationsmentioning

confidence: 99%

Enhanced Uplink Quantum Communication with Satellites via Downlink Channels

Villaseñor,

He,

Wang

et al. 2021

Preprint

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In developing the global Quantum Internet, quantum communication with low-Earth-orbit satellites will play a pivotal role. Such communication will need to be two way: effective not only in the satellite-to-ground (downlink) channel but also in the ground-to-satellite channel (uplink). Given that losses on this latter channel are significantly larger relative to the former, techniques that can exploit the superior downlink to enhance quantum communication in the uplink should be explored. In this work we do just that -exploring how continuous variable entanglement in the form of two-mode squeezed vacuum (TMSV) states can be used to significantly enhance the fidelity of ground-to-satellite quantum-state transfer relative to direct uplink-transfer. More specifically, through detailed phase-screen simulations of beam evolution through turbulent atmospheres in both the downlink and uplink channels, we demonstrate how a TMSV teleportation channel created by the satellite can be used to dramatically improve the fidelity of uplink coherentstate transfer relative to direct transfer. We then show how this, in turn, leads to the uplink-transmission of a higher alphabet of coherent states. Additionally, we show how non-Gaussian operations acting on the received component of the TMSV state at the ground station can lead to even further enhancement. Since TMSV states can be readily produced in situ on a satellite platform and form a reliable teleportation channel for most quantum states, our work suggests future satellites forming part of the emerging Quantum Internet should be designed with uplink-communication via TMSV teleportation in mind.

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Section: A Other Quantum States and Operationsmentioning

confidence: 99%

Enhanced Uplink Quantum Communication with Satellites via Downlink Channels

Villaseñor,

He,

Wang

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In such schemes, the use of the TMSV entangled teleportation channel (a CV channel) can be utilized as the resource to teleport the DV qubit state [95]. Thus the scheme operates directly on this and more complex quantum states such as hybrid DV-CV entangled states -even on both components of such states [96]. This flexibility of CV entanglement channels over DV entanglement channels is another advantage offered by this scheme.…”

Section: A Other Quantum States and Operationsmentioning

confidence: 99%

Enhanced Uplink Quantum Communication With Satellites via Downlink Channels

Villaseñor

Wang

et al. 2021

IEEE Trans. Quantum Eng.

Self Cite

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In developing the global Quantum Internet, quantum communication with low-Earth-orbit satellites will play a pivotal role. Such communication will need to be two way: effective not only in the satellite-to-ground (downlink) channel but also in the ground-to-satellite channel (uplink). Given that losses on this latter channel are significantly larger relative to the former, techniques that can exploit the superior downlink to enhance quantum communication in the uplink should be explored. In this work we do just that -explore how continuous variable entanglement in the form of two-mode squeezed vacuum (TMSV) states can be used to significantly enhance the fidelity of ground-to-satellite quantum-state transfer relative to direct uplink-transfer. More specifically, through detailed phase-screen simulations of beam evolution through turbulent atmospheres in both the downlink and uplink channels, we demonstrate how a TMSV teleportation channel, created by the satellite, can be used to dramatically improve the fidelity of uplink coherent-state transfer relative to direct transfer. We then show how this, in turn, leads to the uplink-transmission of a higher alphabet of coherent states. Additionally, we show how non-Gaussian operations, acting on the received component of the TMSV state at the ground station, can lead to even further enhancement. Since TMSV states can readily be produced in situ on a satellite platform and form a reliable teleportation channel for most quantum states, our work suggests that future satellites forming part of the emerging Quantum Internet should be designed with uplink-communication via TMSV teleportation in mind.

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“…As a typical non-Gaussian state of light, optical cat states have been experimentally prepared by subtracting one photon [19][20][21][22], two photons [23] and three photons [24] from squeezed vacuum states. Since a squeezed vacuum state is a continuous-variable quantum resource and the photon detection is a typical discretevariable technique, the preparation of an optical cat state involves hybrid quantum information processing techniques [26][27][28]. The prepared optical cat states have been applied in quantum teleportation of cat states [21], tele-amplification [29], preparation of hybrid entangled states [30][31][32][33], and the Hadamard gate [34].…”

Section: Introductionmentioning

confidence: 99%

Experimental Preparation and Manipulation of Squeezed Cat States via an All‐Optical In‐Line Squeezer

Wang

Zhang

Qin

et al. 2022

Laser & Photonics Reviews

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The squeezed cat state, an essential quantum resource, can be used for quantum error correction and slowing decoherence of the optical cat state. However, preparing a squeezed cat state with high generation rate, and effectively manipulating it, remain challenging. In this work, a high-performance all-optical in-line squeezer is developed to prepare a squeezed cat state and manipulate the phase of the quadrature squeezing. This scheme has the advantages that the phase of the quadrature squeezing of the squeezed cat state can be manipulated by changing the working condition of the squeezer, and that a higher generation rate can be achieved via the deterministic squeezing operation of the in-line squeezer. The generation rate of squeezed cat states reaches 2 kHz, the same as that of the initial cat state. The all-optical in-line squeezer proposed here removes the requirements of electro-optic and opto-electric conversions necessary for an off-line squeezer, thus enabling high-bandwidth squeezing operations on non-Gaussian states. These results provide an efficient method to prepare and manipulate optical squeezed cat states, which makes a step closer to their applications in all-optical quantum information processing.

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Satellite‐based distribution of hybrid entanglement

Cited by 13 publications

References 58 publications

Enhanced Uplink Quantum Communication with Satellites via Downlink Channels

Enhanced Uplink Quantum Communication with Satellites via Downlink Channels

Enhanced Uplink Quantum Communication With Satellites via Downlink Channels

Experimental Preparation and Manipulation of Squeezed Cat States via an All‐Optical In‐Line Squeezer

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