Prospects for quantum computing with an array of ultracold polar paramagnetic molecules

2016/01/11 by Mallikarjun Karra, Ketan Sharma, Bretislav Friedrich +4 · 1 voice · 1 citation
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Quantum optics and atomic interactions #physics.atom-ph #physics.chem-ph #quant-ph

paper · pdf · doi:10.1063/1.4942928

arxiv published 2016/01/11 · arxiv updated 2016/01/11 · openalex publication_date 2016/03/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Arrays of trapped ultracold molecules represent a promising platform for implementing a universal quantum computer. DeMille [Phys. Rev. Lett. 88, 067901 (2002)] has detailed a prototype design based on Stark states of polar (1)Σ molecules as qubits. Herein, we consider an array of polar (2)Σ molecules which are, in addition, inherently paramagnetic and whose Hund's case (b) free-rotor pair-eigenstates are Bell states. We show that by subjecting the array to combinations of concurrent homogeneous and inhomogeneous electric and magnetic fields, the entanglement of the array's Stark and Zeeman states can be tuned and the qubit sites addressed. Two schemes for implementing an optically controlled CNOT gate are proposed and their feasibility discussed in the face of the broadening of spectral lines due to dipole-dipole coupling and the inhomogeneity of the electric and magnetic fields.

Citations

• Single Molecule Magnetic Resonance and Quantum Computation
• Two-bit gates are universal for quantum computation
• Entanglement of Formation of an Arbitrary State of Two Qubits
• Adiabatic Quantum Computation Is Equivalent to Standard Quantum Computation
• Entanglement of a Pair of Quantum Bits
• Measurement-based quantum computation on cluster states
• Quantum theory, the Church–Turing principle and the universal quantum computer
• The Physical Implementation of Quantum Computation
• Simulating physics with computers
• Quantum Computation and Quantum Information
• Polynomial-Time Algorithms for Prime Factorization and Discrete Logarithms on a Quantum Computer
• Quantum computing

Cited by

• Creation of a degenerate Bose-Bose mixture of erbium and lithium atoms

Discussions

• Quantum Conputing with Ultra-Cold Molecules [hn, 3 points, 0 comments]

Related

• Schemes for robust quantum computation with polar molecules: analysis of experimental feasibility
• Polar molecules near superconducting resonators: a coherent, all-electrical, molecule-mesoscopic interface
• Scalable platform for qudit-based quantum computing using polar molecules
• Quantum computation using arrays of N polar molecules in pendular states
• Quantum information processing in self-assembled crystals of cold polar molecules