134 citations · 330 across the 15 of their papers we have counts for
15 papers
Fast GHZ encoding with fidelity
Laura Shou, T. C. Mooney, Twesh Upadhyaya +1
We prove that -fidelity -qubit Greenberger--Horne--Zeilinger (GHZ) encoding can be performed in time using all-to-all 2-local Hamiltonians with bounded 2…
Thermal Throttling of Quantum State Transfer
Twesh Upadhyaya, T. C. Mooney, Yifan Hong +1
Quantum state transfer on qubit lattices is a crucial step in a panoply of quantum information processing tasks. Understanding its fundamental limits in the presence of practical i…
Numerical security framework for quantum key distribution with bypass channels
Lewis Wooltorton, Twesh Upadhyaya, Mohsen Razavi
Satellite based quantum key distribution (QKD) aims to establish secure key exchange over long distances despite significant technological challenges. To alleviate some of these ch…
Robustness-Runtime Tradeoff for Quantum State Transfer
Twesh Upadhyaya, Yifan Hong, T. C. Mooney +1
Quantum state transfer is the primitive of transporting an unknown state on one site of a lattice to another. Using power-law interactions, recent state transfer protocols achieve…
Bosonic statistics enhance Maxwell's demon in photonic experiment
Malaquias Correa Anguita, Sara Marzban, William F. Braasch +4
Maxwell's demon elucidates the value of information in thermodynamics, using measurement and feedback: he evolves an equilibrated gas into a nonequilibrium state, from which one mi…
Majorization theory for quasiprobabilities
Twesh Upadhyaya, Zacharie Van Herstraeten, Jack Davis +3
The question of how to characterize disorder arises in a wide variety of settings, including information theory, economics, and quantum thermodynamics. The theory of majorization p…
Composable free-space continuous-variable quantum key distribution using discrete modulation
Kevin Jaksch, Thomas Dirmeier, Yannick Weiser +16
Continuous-variable (CV) quantum key distribution (QKD) allows for quantum secure communication with the benefit of being close to existing classical coherent communication. In rec…
Noncommuting conserved charges in quantum thermodynamics and beyond
Shayan Majidy, William F. Braasch, Aleksander Lasek +3
Thermodynamic systems typically conserve quantities ("charges") such as energy and particle number. The charges are often assumed implicitly to commute with each other. Yet quantum…
Non-Abelian transport distinguishes three usually equivalent notions of entropy production
Twesh Upadhyaya, William F. Braasch, Gabriel T. Landi +1
We extend entropy production to a deeply quantum regime involving noncommuting conserved quantities. Consider a unitary transporting conserved quantities ("charges") between two sy…
Imperfect Phase-Randomisation and Generalised Decoy-State Quantum Key Distribution
Shlok Nahar, Twesh Upadhyaya, Norbert Lütkenhaus
Decoy-state methods [1-3] are essential to perform quantum key distribution (QKD) at large distances in the absence of single photon sources. However, the standard techniques apply…
Finite-Size Security for Discrete-Modulated Continuous-Variable Quantum Key Distribution Protocols
Florian Kanitschar, Ian George, Jie Lin +2
Discrete-Modulated (DM) Continuous-Variable Quantum Key Distribution (CV-QKD) protocols are promising candidates for commercial implementations of quantum communication networks du…
An Improved Correction Term for Dimension Reduction in Quantum Key Distribution
Twesh Upadhyaya, Thomas van Himbeeck, Norbert Lütkenhaus
The dimension reduction method enables security proofs of quantum key distribution (QKD) protocols that are originally formulated in infinite dimensions via reduction to a tractabl…
Dimension Reduction in Quantum Key Distribution for Continuous- and Discrete-Variable Protocols
Twesh Upadhyaya, Thomas van Himbeeck, Jie Lin +1
We develop a method to connect the infinite-dimensional description of optical continuous-variable quantum key distribution (QKD) protocols to a finite-dimensional formulation. The…
Asymptotic security analysis of discrete-modulated continuous-variable quantum key distribution
Jie Lin, Twesh Upadhyaya, Norbert Lütkenhaus
Continuous-variable quantum key distribution (CV QKD) protocols with discrete modulation are interesting due to their experimental simplicity and their great potential for massive…
Lift & Project Systems Performing on the Partial-Vertex-Cover Polytope
Konstantinos Georgiou, Andy Jiang, Edward Lee +3
We study integrality gap (IG) lower bounds on strong LP and SDP relaxations derived by the Sherali-Adams (SA), Lovasz-Schrijver-SDP (LS+), and Sherali-Adams-SDP (SA+) lift-and-proj…