37 citations · 97 across the 20 of their papers we have counts for
13 papers · 1 filter
Optimal photon budget allocation in E91 protocol
Melis Pahalı, Kadir Durak, Utku Tefek
In order for the deployment of quantum communication technologies in a global scale, it is necessary to meet data exchange demand of various size establishments per certain time in…
Cryptographic Security Concerns on Timestamp Sharing via Public Channel in Quantum Key Distribution Systems
Melis Pahalı, Utku Tefek, Kadir Durak
Quantum key distribution protocols are known to be vulnerable against a side channel attack that exploits the time difference in detector responses used to obtain key bits. The rec…
Noise-Tolerant Object Detection and Ranging Using Quantum Correlations
Hashir Kuniyil, Helin Ozel, Hasan Yılmaz +1
Imaging, detection and ranging of objects in the presence of significant background noise is a fundamental challenge in optical sensing. Overcoming the limitations imposed in conve…
Quantum signatures in quadratic optomechanical heat engine with an atom in a tapered trap
Mohsen Izadyari, Mehmet Öncü, Kadir Durak +1
We investigate how quantum signatures can emerge in a single atom heat engine consisting of an atom confined in a tapered trap and subject to hot and cold thermal reservoirs. A sim…
Feasibility Study for CubeSat Based Trusted Node Configuration Global QKD Network
Ekin Aykut, Hashir Kuniyil, Melis Pahalı +3
Quantum key distribution (QKD) is the most used protocol in the context of quantum cryptography for sharing a private encryption key between two parties. Covid-19 pandemic has rais…
Optimization of collection optics for maximum fidelity in entangled photon sources
Kadir Durak
In this report the decoherence sources for entangled photons created by spontaneous parametric down conversion phenomenon is studied. The phase and spatial distinguishability of ph…
Entanglement demonstration on board a nano-satellite
Aitor Villar, Alexander Lohrmann, Xueliang Bai +14
Global quantum networks for secure communication can be realised using large fleets of satellites distributing entangled photon-pairs between ground-based nodes. Because the cost o…
An attack to quantum systems through RF radiation tracking
Kadir Durak, Naser Jam
A newfound security breach in the physical nature of single photon detectors that are generally used in quantum key distribution is explained, we found that the bit contents of a q…
Optical Post Processing for High Speed Quantum Random Number Generators
Abdulrahman Dandasi, Helin Ozel, Orkun Hasekioglu +1
The speed of quantum random number generators is a major concern for practical quantum applications. However, the bit extraction process limits the final bit rate due to lack of co…
Tailoring the down conversion emission profile via direct imaging with a camera
Hashir Kuniyil, Safak Ozcimen, Kadir Durak
We present the analysis of emission profile of downconverted photons from a critically phase-matched nonlinear crystal. This is done via direct imaging of down converted photons by…
Object Tracking and Identification by Quantum Radar
Kadir Durak, Naser Jam, Cagri Dindar
Quantum Radar is a promising technology that could have a strong impact on the civilian and military realms. In this study we introduce a new concept design for implementing a Quan…
Single atoms coupled to a near-concentric cavity
Chi Huan Nguyen, Adrian Nugraha Utama, Nick Lewty +5
Concentric cavities can lead to strong photon-atom coupling without a need for high finesse or small physical-cavity volume. In a proof-of-principle experiment of this concept we d…
Diffraction-limited Fabry-Perot Cavity in the Near Concentric Regime
Kadir Durak, Chi Huan Nguyen, Victor Leong +2
Nearly concentric optical cavities can be used to prepare optical fields with a very small mode volume. We implement an anaclastic design of a such a cavity that significantly simp…