29 citations · 137 across the 22 of their papers we have counts for
22 papers
Concatenating Algebraic Codes over High-Rate Quantum LDPC Codes
Adam Wills, Michael E. Beverland, Lev S. Bishop +4
Different quantum error correction schemes trade off overhead, error suppression, and hardware connectivity. Code concatenation can relax these tradeoffs by using an outer code who…
First-order and interior-point methods for entanglement detection
Javier Pena, Vikesh Siddhu, Sridhar Tayur
Quantum entanglement lies at the heart of quantum information science, yet its reliable detection in high-dimensional or noisy systems remains a fundamental computational challenge…
Polar Codes for Erasure and Unital Classical-Quantum Markovian Channels
Jaswanthi Mandalapu, Vikesh Siddhu, Krishna Jagannathan
We consider classical-quantum (cq-)channels with memory, and establish that Arıkan-constructed polar codes achieve the classical capacity for two key noise models, namely for (i) q…
Basic entanglement distillation with realistic noise
Vikesh Siddhu, Erick Winston, David C. McKay +1
Entanglement distillation is a key component of modular quantum computing and long-range quantum communications. However, this powerful tool to reduce noise in entangled states is…
Distilled remote entanglement between superconducting qubits across optical channels
Nicolas Dirnegger, Moein Malekakhlagh, Vikesh Siddhu +5
A promising quantum computing architecture comprises modules of superconducting quantum processors linked via optical channels using quantum transducers. As quantum transducer hard…
Uniform Additivity of Tripartite Optimized Correlation Measures
Joshua Levin, Ariel Shlosberg, Vikesh Siddhu +1
Information theory provides a framework for answering fundamental questions about the optimal performance of many important quantum communication and computational tasks. In many c…
Adaptive Channel Reshaping for Improved Entanglement Distillation
Dina Abdelhadi, Tomas Jochym-O'Connor, Vikesh Siddhu +1
Quantum communication and computation heavily rely on entanglement distillation protocols. There is a plethora of distillation protocols for Pauli channels and also for some non-Pa…
Batch Entanglement Detection in Parameterized Qubit States using Classical Bandit Algorithms
K. Bharati, Vikesh Siddhu, Krishna Jagannathan
Entanglement is a key property of quantum states that acts as a resource for a wide range of tasks in quantum computing. Entanglement detection is a key conceptual and practical ch…
Entanglement sharing across a damping-dephasing channel
Vikesh Siddhu, Dina Abdelhadi, Tomas Jochym-O'Connor +1
Entanglement distillation is a fundamental information processing task whose implementation is key to quantum communication and modular quantum computing. Noise experienced by such…
Maximum expectation of observables with restricted purity states
Vikesh Siddhu, John Smolin
Assessment of practical quantum information processing (QIP) remains partial without understanding limits imposed by noise. Unfortunately, mere description of noise grows exponenti…
Optimal one-shot entanglement sharing
Vikesh Siddhu, John Smolin
Sharing entanglement across quantum interconnects is fundamental for quantum information processing. We discuss a practical setting where this interconnect, modeled by a quantum ch…
On the separation of correlation-assisted sum capacities of multiple access channels
Akshay Seshadri, Felix Leditzky, Vikesh Siddhu +1
The capacity of a channel characterizes the maximum rate at which information can be transmitted through the channel asymptotically faithfully. For a channel with multiple senders…
The platypus of the quantum channel zoo
Felix Leditzky, Debbie Leung, Vikesh Siddhu +2
Understanding quantum channels and the strange behavior of their capacities is a key objective of quantum information theory. Here we study a remarkably simple, low-dimensional, si…
Generic nonadditivity of quantum capacity in simple channels
Felix Leditzky, Debbie Leung, Vikesh Siddhu +2
Determining capacities of quantum channels is a fundamental question in quantum information theory. Despite having rigorous coding theorems quantifying the flow of information acro…
Unital Qubit Queue-channels: Classical Capacity and Product Decoding
Vikesh Siddhu, Avhishek Chatterjee, Krishna Jagannathan +2
Quantum queue-channels arise naturally in the context of buffering in quantum networks, wherein the noise suffered by the quantum states depends on the time spent waiting in the bu…
Queue-Channel Capacities with Generalized Amplitude Damping
Vikesh Siddhu, Avhishek Chatterjee, Krishna Jagannathan +2
The generalized amplitude damping channel (GADC) is considered an important model for quantum communications, especially over optical networks. We make two salient contributions in…
Allowing leakage can increase quantum transmission
Vikesh Siddhu
Entanglement and quantum information lie at the root of quantum theory. These remarkable resources are generally believed to diminish when systems carrying them interact with their…
Entropic singularities give rise to quantum transmission
Vikesh Siddhu
When can noiseless quantum information be sent across noisy quantum devices? And at what maximum rate? These questions lie at the heart of quantum technology, but remain unanswered…
Positivity and nonadditivity of quantum capacities using generalized erasure channels
Vikesh Siddhu, Robert B. Griffiths
We consider various forms of a process, which we call {\em gluing}, for combining two or more complementary quantum channel pairs to form a composite. O…
Maximum a posteriori estimation of quantum states
Vikesh Siddhu
Using a Bayesian methodology, we introduce the maximum a posteriori~(MAP) estimator for quantum state and process tomography. The maximum likelihood, hedged maximum likelihood, max…
Degradable Quantum Channels Using Pure to Product of Pure States Isometries
Vikesh Siddhu, Robert B. Griffiths
We consider a family of quantum channels characterized by the fact that certain (in general nonorthogonal) Pure states at the channel entrance are mapped to (tensor) Products of Pu…
Quantum Private Comparison over noisy channels
Vikesh Siddhu, Arvind
Quantum Private Comparison (QPC) allows us to protect private information during its comparison. In the past various three-party quantum protocols have been proposed that claim to…