Five-Spin Supramolecule for Simulating Quantum Decoherence of Bell States

Abstract

We report a supramolecule that contains five spins of two different types and with, crucially, two different and predictable interaction energies between the spins. The supramolecule is characterized, and the interaction energies are demonstrated by electron paramagnetic resonance (EPR) spectroscopy. Based on the measured parameters, we propose experiments that would allow this designed supramolecule to be used to simulate quantum decoherence in maximally entangled Bell states that could be used in quantum teleportation.

Disassembly Mechanisms and Energetics of Polymetallic Rings and Rotaxanes

“…Understanding the stability of the compounds is important in order to make increasingly complex molecules for specific quantum applications, e.g., synthesis of a five-spin supramolecule that could be used to simulate decoherence in Bell states. 21 As supramolecular chemistry using polymetallic units as building blocks develops, 22−25 the understanding of ligand metathesis achieved here should be important in designing future synthesis routes.…”

“…The specific systems studied have been proposed as qubits for quantum information processing, and the ability to link the rings into multiple qubit arrays is a key advantage that this approach has over more conventional approaches. Understanding the stability of the compounds is important in order to make increasingly complex molecules for specific quantum applications, e.g., synthesis of a five-spin supramolecule that could be used to simulate decoherence in Bell states . As supramolecular chemistry using polymetallic units as building blocks develops, − the understanding of ligand metathesis achieved here should be important in designing future synthesis routes.…”

Chirality‐Induced Spin Selectivity: An Enabling Technology for Quantum Applications

“…ii) Quantum gates iii) Chemical engineering of the Hamiltonian [ 7,8,13,30] [ [20][21][22][23] [ 27,31] iv) Quantum algorithms v) Embedded quantum error correction vi) Processability and hybrid structures [28] [ 17, [32][33][34] [ [35][36][37][38][39][40][41][42][43][44] Each column refers to a different achievement/capability. In the different rows, we report the experimental results/schemes, the related molecular structures, and the relevant references.…”

“…ii) The possibility to link qubits together to implement entangling quantum gates, [21][22][23] for example, by pulse electron paramagnetic resonance techniques. [20] iii) The capability to chemically engineer the spin Hamiltonian to meet requirements for the implementation of specific algorithms [ 27,31] (Top figure in (iii): adapted with permission. [27] Copyright 2022, American Chemical Society).…”

Dipolar-Coupled Entangled Molecular 4f Qubits

“…Molecular magnetic materials offer possibilities to circumvent some of these limitations and therefore constitute a very promising avenue for the next-generation quantum information technology devices. − Unlike many other candidates, molecular magnetic materials routinely display many low energy states compatible with the encoding of qubits and even acting as integrated quantum processors, the additional levels providing the capability to expand the dimension of the computational space or to efficiently encode quantum error correction algorithms. − The critical parameter for the suitability of such materials for use in quantum information devices is the phase memory time, T m , reflecting the time for which the state in which information is encoded retains its phase coherence . Decoherence, the interaction of the quantum system with its environment, results in loss of superposition and/or entanglement, collapsing the dynamic state of the system to its thermal equilibrium static eigenvectors.…”