Quantum entanglement Archives - IEEE Transactions on Quantum Engineering

Fault-Tolerant One-Way Noiseless Amplification for Microwave Bosonic Quantum Information Processing

August 7, 2024Hany Khalifa, Riku Jäntti, Gheorghe Sorin ParaoanuQuantum InternetComputational modeling, Logic gates, Microwave amplifiers, Photonics, Propagation losses, Quantum entanglement, Qubit

Microwave quantum information networks require reliable transmission of single-photon propagating modes over lossy channels. In this article, we propose a microwave noiseless linear amplifier (NLA) suitable to circumvent the losses incurred by a flying photon undergoing an amplitude damping channel (ADC). The proposed model is constructed by engineering a simple 1-D four-node cluster state. Contrary […]

Resource Placement for Rate and Fidelity Maximization in Quantum Networks

July 23, 2024Shahrooz Pouryousef, Hassan Shapourian, Alireza Shabani, Ramana Kompella, Don TowsleyQuantum Networking & CommunicationsCoherence time, Optimization, Planning, Quantum entanglement, Quantum repeaters, Qubit, Repeaters

Existing classical optical network infrastructure cannot be immediately used for quantum network applications due to photon loss. The first step toward enabling quantum networks is the integration of quantum repeaters into optical networks. However, the expenses and intrinsic noise inherent in quantum hardware underscore the need for an efficient deployment strategy that optimizes the placement […]

Resource Placement for Rate and Fidelity Maximization in Quantum Networks

July 23, 2024Shahrooz Pouryousef, Hassan Shapourian, Alireza Shabani, Ramana Kompella, Don TowsleyQuantum InternetCoherence time, Optimization, Planning, Quantum entanglement, Quantum repeaters, Qubit, Repeaters

Approximate Solutions of Combinatorial Problems via Quantum Relaxations

July 4, 2024Bryce Fuller, Charles Hadfield, Jennifer R. Glick, Takashi Imamichi, Toshinari Itoko, Richard J. Thompson, Yang Jiao, Marna M. Kagele, Adriana W. Blom-Schieber, Rudy Raymond, Antonio MezzacapoQuantum ComputingCodes, Computers, Optimization, Quantum entanglement, Quantum state, Qubit, Stationary state

Combinatorial problems are formulated to find optimal designs within a fixed set of constraints and are commonly found across diverse engineering and scientific domains. Understanding how to best use quantum computers for combinatorial optimization remains an ongoing area of study. Here, we propose new methods for producing approximate solutions to quadratic unconstrained binary optimization problems, […]

Harnessing the Power of Long-Range Entanglement for Clifford Circuit Synthesis

May 16, 2024Willers Yang, Patrick RallQuantum ComputingCodes, Computer architecture, Integrated circuit modeling, Logic gates, Quantum entanglement, Qubit, Rotation measurement

In superconducting architectures, limited connectivity remains a significant challenge for the synthesis and compilation of quantum circuits. We consider models of entanglement-assisted computation where long-range operations are achieved through injections of large Greenberger–Horne–Zeilinger (GHZ) states. These are prepared using ancillary qubits acting as an “entanglement bus,” unlocking global operation primitives such as multiqubit Pauli rotations […]

Reliable Quantum Communications Based on Asymmetry in Distillation and Coding

May 10, 2024Lorenzo Valentini, René Bødker Christensen, Petar Popovski, Marco ChianiQuantum InternetEncoding, Protocols, Quantum computing, Quantum entanglement, Qubit, Reliability, Teleportation

The reliable provision of entangled qubits is an essential precondition in a variety of schemes for distributed quantum computing. This is challenged by multiple nuisances, such as errors during the transmission over quantum links, but also due to degradation of the entanglement over time due to decoherence. The latter can be seen as a constraint […]

On the Bipartite Entanglement Capacity of Quantum Networks

February 16, 2024Gayane Vardoyan, Emily van Milligen, Saikat Guha, Stephanie Wehner, Don TowsleyQuantum InternetCapacity planning, Multiplexing, Probabilistic logic, Quantum entanglement, Quantum networks, Routing, Topology

We consider the problem of multipath entanglement distribution to a pair of nodes in a quantum network consisting of devices with nondeterministic entanglement swapping capabilities. Multipath entanglement distribution enables a network to establish end-to-end entangled links across any number of available paths with preestablished link-level entanglement. Probabilistic entanglement swapping, on the other hand, limits the […]

Tools for the Analysis of Quantum Protocols Requiring State Generation Within a Time Window

January 31, 2024Bethany Davies, Thomas Beauchamp, Gayane Vardoyan, Stephanie WehnerQuantum InternetComputational modeling, Performance evaluation, Probabilistic logic, Protocols, Quantum entanglement, Quantum networks, Qubit

Quantum protocols commonly require a certain number of quantum resource states to be available simultaneously. An important class of examples is quantum network protocols that require a certain number of entangled pairs. Here, we consider a setting in which a process generates a quantum resource state with some probability p in each time step and […]

State Preparation on Quantum Computers via Quantum Steering

January 24, 2024Daniel Volya, Prabhat MishraQuantum ComputingComputational modeling, Protocols, Quantum computing, Quantum entanglement, Quantum state, Quantum system, Qubit

Quantum computers present a compelling platform for the study of open quantum systems, namely, the nonunitary dynamics of a system. Here, we investigate and report digital simulations of Markovian nonunitary dynamics that converge to a unique steady state. The steady state is programmed as a desired target state, yielding semblance to a quantum state preparation […]

A Linear Algebraic Framework for Dynamic Scheduling Over Memory-Equipped Quantum Networks

December 11, 2023Paolo Fittipaldi, Anastasios Giovanidis, Frédéric GrosshansQuantum InternetOptical fiber networks, Quantum entanglement, Quantum networks, Qubit, Queueing analysis, Stress, Switches

Quantum internetworking is a recent field that promises numerous interesting applications, many of which require the distribution of entanglement between arbitrary pairs of users. This article deals with the problem of scheduling in an arbitrary entanglement swapping quantum network—often called first-generation quantum network—in its general topology, multicommodity, loss-aware formulation. We introduce a linear algebraic framework […]