Quantum Spin Networks: Graphs of Quantum Geometry
Spin networks are graphs labeled by spins. They appear in quantum gravity and in quantum information. Properties, uses and experimental work.
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Quantum Computational Networks and Their Models
Models of quantum computational networks: how processors and links are combined, and uses in cryptography, optimization and cloud computing.
Quantum Lambda Calculus: Functional Quantum Code
Quantum lambda calculus extends the lambda calculus to describe quantum programs. Its origins, syntax, handling of entanglement and uses.
QRAM: Quantum Random Access Memory, Explained
Quantum random access memory would let algorithms query data in superposition. How QRAM would work, why it is hard to build and why it matters.
Quantum Pushdown Automata: Stacks Meet Qubits
Quantum pushdown automata add a stack to quantum finite automata. Their formal definition, operations and comparison with classical pushdown automata.
Quantum Finite Automata and Their Power
Quantum finite automata are the simplest quantum computing models. How they compare with classical automata and which languages they recognize.
The One-Way Quantum Computer: Cluster States
The one-way quantum computer starts from an entangled cluster state and computes through single-qubit measurements. How it works and scales.
The Quantum Circuit Model: The Standard Picture
The quantum circuit model describes computation as qubits passing through gates and ending in measurement. Design, complexity and simulation.
The Quantum Turing Machine and Its Definition
The quantum Turing machine formalizes quantum computation, as defined by Deutsch in 1985. Its definition, relation to circuits and complexity.
Quantum Secure Direct Communication Protocols
Protocols for quantum secure direct communication, how they send messages without a prior key, and their security, advantages and limits.
Quantum Secure Computation: What Is Possible
What quantum secure computation can and cannot achieve: QKD, secure multi-party computation, blind computing and quantum-safe blockchains.
Quantum Cryptographic Protocols: BB84 and Beyond
Quantum cryptographic protocols from BB84 and E91 onwards: how QKD detects eavesdroppers, known hacking risks and post-quantum alternatives.