42 citations · 149 across the 21 of their papers we have counts for
22 papers
Entangling Atomic Quantum Memories Using High-Order Modulated Coherent States
Chaohan Cui, Prajit Dhara, Saikat Guha
High-order coherent-state modulation and collective midpoint measurements enable multi-ebit entanglement distribution between cavity-coupled atomic memories. An SRM-inspired 16-QAM…
Non-Markovian delay-assisted sensing with waveguide-coupled quantum emitters
Prajit Dhara, Isack Padilla, Saikat Guha +2
We show that in a minimal setup of two waveguide-coupled quantum emitters, separated by long distances and subject to an external field, time-delayed feedback can be a resource for…
Optimum-Transmission Free-Space Optical Communications
Prajit Dhara, Babak N. Saif, Jeffrey H. Shapiro +1
Slepian developed the Prolate Spheroidal Wavefunction (PSW) spatial-mode basis, which forms the normal modes of the Fresnel-propagation kernel of a free-space optical communication…
Scheduling in Quantum Satellite Networks: Fairness and Performance Optimization
Ashutosh Jayant Dikshit, Naga Lakshmi Anipeddi, Prajit Dhara +5
Quantum satellite networks offer a promising solution for achieving long-distance quantum communication by enabling entanglement distribution across global scales. This work formul…
Full-stack Physics-level model of cascaded entanglement links
J. Gabriel Richardson, Prajit Dhara, Abhishek Bhatt +2
While the last few decades have seen a proliferation of experimental demonstrations of entanglement sources, practicality of deployment has been a secondary concern. Recently, the…
Coherent State Assisted Entanglement Generation Between Quantum Memories
Chaohan Cui, Prajit Dhara, Saikat Guha
Generating entanglement deterministically at a capacity-approaching rate is critical for next-generation quantum networks. We revisit previous protocols and present a readily-reali…
Blockwise Post-processing in Satellite-based Quantum Key Distribution
Minu J. Bae, Nitish K. Panigrahy, Prajit Dhara +5
Free-space satellite communication has significantly lower photon loss than terrestrial communication via optical fibers. Satellite-based quantum key distribution (QKD) leverages t…
Interfacing Gottesman-Kitaev-Preskill Qubits to Quantum Memories
Prajit Dhara, Liang Jiang, Saikat Guha
Gottesman-Kitaev-Preskill (GKP) states have been demonstrated to pose significant advantages when utilized for fault-tolerant all optical continuous-variable quantum computing as w…
Entangling Quantum Memories at Channel Capacity
Prajit Dhara, Liang Jiang, Saikat Guha
Entangling quantum memories, mediated by optical-frequency or microwave channels, at high rates and fidelities is key for linking qubits across short and long ranges. All well-know…
Blockwise Key Distillation in Satellite-based Quantum Key Distribution
Minu J. Bae, Nitish K. Panigrahy, Prajit Dhara +4
Free-space satellite communication has significantly lower photon loss than terrestrial communication via optical fibers. Satellite-based quantum key distribution (QKD) leverages t…
Phonon-Induced Decoherence in Color-Center Qubits
Prajit Dhara, Saikat Guha
Electron spin states of solid-state defects such as Nitrogen- and Silicon-vacancy {\em color centers} in diamond are a leading quantum-memory candidate for quantum communications a…
Entangling Quantum Memories via Heralded Photonic Bell Measurement
Prajit Dhara, Dirk Englund, Saikat Guha
A common way to entangle quantum memories is via photonic entanglement swaps. Each of two memories, connected by an optical channel, emits a photonic qubit entangled with itself, a…
Exploring the possibility of a complex-valued non-Gaussianity measure for quantum states of light
Andrew J. Pizzimenti, Prajit Dhara, Zacharie Van Herstraeten +2
We consider a quantity that is the differential relative entropy between a generic Wigner function and a Gaussian one. We prove that said quantity is minimized with respect to its…
Zero-Added-Loss Entangled Photon Multiplexing for Ground- and Space-Based Quantum Networks
Kevin C. Chen, Prajit Dhara, Mikkel Heuck +4
We propose a scheme for optical entanglement distribution in quantum networks based on a quasi-deterministic entangled photon pair source. By combining heralded photonic Bell pair…
Optimal Entanglement Distribution using Satellite Based Quantum Networks
Nitish K. Panigrahy, Prajit Dhara, Don Towsley +2
Recent technological advancements in satellite based quantum communication has made it a promising technology for realizing global scale quantum networks. Due to better loss distan…
Heralded-Multiplexed High-Efficiency Cascaded Source of Dual-Rail Polarization-Entangled Photon Pairs using Spontaneous Parametric Down Conversion
Prajit Dhara, Spencer J. Johnson, Christos N. Gagatsos +2
Deterministic sources of high-fidelity entangled qubit pairs encoded in the dual-rail photonic basis, i.e., presence of a single photon in one of two orthogonal modes, are a key en…
Multiplexed quantum repeaters based on dual-species trapped-ion systems
Prajit Dhara, Norbert M. Linke, Edo Waks +2
Trapped ions form an advanced technology platform for quantum information processing with long qubit coherence times, high-fidelity quantum logic gates, optically active qubits, an…
Coherent manipulation of graph states composed of finite-energy Gottesman-Kitaev-Preskill-encoded qubits
Kaushik P. Seshadreesan, Prajit Dhara, Ashlesha Patil +2
Graph states are a central resource in measurement-based quantum information processing. In the photonic qubit architecture based on Gottesman-Kitaev-Preskill (GKP) encoding, the g…
Subexponential rate versus distance with time-multiplexed quantum repeaters
Prajit Dhara, Ashlesha Patil, Hari Krovi +1
Quantum communications capacity using direct transmission over length- optical fiber scales as , where is the fiber's loss coefficient. The rate achieved usi…
Role of polarized tip-enhanced Raman spectroscopy in the enhancement of interface optical phonon modes in AlGaN multi-quantum wells
A. K. Sivadasan, Prajit Dhara, Chirantan Singha +5
Group III nitride based two-dimensional multi-quantum well (MQW) nanostructures find remarkable applications in the visible to ultraviolet light sources. The interface optical (IFO…
Near Field Scanning Optical Imaging of Gold Nanoparticles in the Sub-Wavelength Limit
Prajit Dhara, A. K. Sivadasan
The near-field scanning optical microscopic (NSOM) imaging of Au nanoparticles with size in the sub-wavelength limit (<wavelength/2N.A.) is reported. The NSOM imaging technique can…
Optical imaging of metallic and semiconductor nanostructures at sub wavelength regime
A. K. Sivadasan, Kishore K. Madapu, Prajit Dhara
The near field scanning optical microscopy (NSOM) is not only a tool for imaging of objects in the sub wavelength limit but also a prominent characteristic tool for understanding t…