Differences
This shows you the differences between two versions of the page.
|
research:quantum_communication:device_independent_qkd [2012/04/05 16:00] thew |
research:quantum_communication:device_independent_qkd [2012/12/06 22:52] (current) bkorzh [Device Independent QKD] |
||
|---|---|---|---|
| Line 4: | Line 4: | ||
| The concept of [[publications:bib:acin2007a|Device Independent QKD]] is relatively new, however, conceptually we have not come so far from Ekert's [[http://prl.aps.org/abstract/PRL/v67/i6/p661_1|original proposal]] for entanglement-based QKD. A recent proposal for Device Independent Quantum Key Distribution (DI-QKD) has brought this fascinating concept into the realms of experimental feasibility [[publications:bib:gisin2010|]]. However, while in theory this could make DI-QKD experimentally feasible, in practice it remains somewhat more of a grand challenge. Nonetheless, a grand challenge that, if realised, could provide a means of securing quantum communication independent of the technology of the devices. | The concept of [[publications:bib:acin2007a|Device Independent QKD]] is relatively new, however, conceptually we have not come so far from Ekert's [[http://prl.aps.org/abstract/PRL/v67/i6/p661_1|original proposal]] for entanglement-based QKD. A recent proposal for Device Independent Quantum Key Distribution (DI-QKD) has brought this fascinating concept into the realms of experimental feasibility [[publications:bib:gisin2010|]]. However, while in theory this could make DI-QKD experimentally feasible, in practice it remains somewhat more of a grand challenge. Nonetheless, a grand challenge that, if realised, could provide a means of securing quantum communication independent of the technology of the devices. | ||
| + | {{ :research:quantum_communication:diqkd_solution83.png?&direct&500|The DI-QKD scenario. Alice and Bob exchange key material as per standard protocols by measuring (M) their photons and performing some classical communication. DI-QKD security requires that every time they choose a measurement (X,Y), they get an output (a0,a1), (b0,b1) with greater that 0.83 efficiency. Transmission loss alone makes this impossible for communication distances. However, if the source (S) is on one (Alice’s) side and there is a heralded photon amplifier (HPA) on the other, then Bob only chooses his measurement when the HPA indicates that the photon has arrived, thus overcoming the problem of transmission loss.}} | ||
| We currently have several activities in this direction. One is based on the concept of using weak photon-photon nonlinearities for heralding entanglement generation. We recently published a [[publications:bib:sangouard2011a|PRL]] on the proof of principle for [[research:quantum_communication:entanglement_swapping:faithful_entanglement_swapping|Faithful Entanglement Swapping Based on Sum-Frequency Generation]] . More recently we have been working on Heralded Photon Amplification, which is one of the key concepts for experimentally feasible DI-QKD. | We currently have several activities in this direction. One is based on the concept of using weak photon-photon nonlinearities for heralding entanglement generation. We recently published a [[publications:bib:sangouard2011a|PRL]] on the proof of principle for [[research:quantum_communication:entanglement_swapping:faithful_entanglement_swapping|Faithful Entanglement Swapping Based on Sum-Frequency Generation]] . More recently we have been working on Heralded Photon Amplification, which is one of the key concepts for experimentally feasible DI-QKD. | ||
| - | |||
| For More information - Contact: [[members:rob_thew|]] | For More information - Contact: [[members:rob_thew|]] | ||
| - | |||
| - | Team: [[members:hugo_zbinden|Hugo Zbinden]], [[members:nicolas_sangouard|]], [[members:bruno_sanguinetti|]], [[members:clara_osorio|]], [[members:anthony_martin|Anthony Martin]], [[members:enrico_pomarico|]], [[members:natalia_bruno|]], [[members:thiago_barbosa_dos_santos|Thiago Guerreiro]] | ||
| - | |||
| ===== Recent Work ===== | ===== Recent Work ===== | ||
| Line 16: | Line 13: | ||
| We have recently been working on nonlinear optics at the single photon level. This seemingly low efficiency process can have some fascinating advantages. [[research:quantum_communication:entanglement_swapping:faithful_entanglement_swapping|Read More]] | We have recently been working on nonlinear optics at the single photon level. This seemingly low efficiency process can have some fascinating advantages. [[research:quantum_communication:entanglement_swapping:faithful_entanglement_swapping|Read More]] | ||
| + | ===== Selected Articles ===== | ||
| - | + | [[publications:bib:osorio2012a|Heralded photon amplification for quantum communication]], C. I. Osorio, N. Bruno, N. Sangouard, H. Zbinden, N. Gisin, R. T. Thew, Phys. Rev. A 86, 023815 (2012) | |
| - | ===== Selected Articles ===== | + | |
| [[research:quantum_communication:entanglement_swapping:faithful_entanglement_swapping|Faithful Entanglement Swapping Based on Sum-Frequency Generation]], N Sangouard, B Sanguinetti, N Curtz, N Gisin, R Thew, H Zbinden, Phys. Rev. Lett. 106, 120403 (2011) | [[research:quantum_communication:entanglement_swapping:faithful_entanglement_swapping|Faithful Entanglement Swapping Based on Sum-Frequency Generation]], N Sangouard, B Sanguinetti, N Curtz, N Gisin, R Thew, H Zbinden, Phys. Rev. Lett. 106, 120403 (2011) | ||
| Line 25: | Line 22: | ||
| [[publications:bib:acin2007a|Device-Independent Security of Quantum Cryptography against Collective Attacks]], A. Acin, N. Brunner, N. Gisin, S. Massar, S. Pironio, V. Scarani, Phys. Rev. Lett. 98, 230501 (2007) | [[publications:bib:acin2007a|Device-Independent Security of Quantum Cryptography against Collective Attacks]], A. Acin, N. Brunner, N. Gisin, S. Massar, S. Pironio, V. Scarani, Phys. Rev. Lett. 98, 230501 (2007) | ||
| - | |||
