Targeting molecular quantum memory with embedded error correction

Abstract

The implementation of a quantum computer requires both to protect information from environmental noise and to implement quantum operations efficiently. Achieving this by a fully fault-tolerant platform, in which quantum...

Quantum error correction with molecular spin qudits

“…Hence, the nuclear T 2 is directly related to the electronic one and is found to be at least ten times larger in recent studies on Yb(trensal) and vanadyl tetraphenylporphyrinate. 12,55 The latter consists of a spin 1/2 electronic spin coupled to a I = 7/2 nucleus, with hyperfine interaction very similar to (PPh 4 ) 2 -[Cu(mnt) 2 ] and hence represents an optimal benchmark. Here, given the remarkably long value measured for T A 2 at 5 K (68 ms), it is reasonable to first assume, for the associated nuclear qudit, T 2 = 0.5 ms.…”

“…Open-shell molecular spin systems, either Molecular Nanomagnets (MNM) [1][2][3][4][5][6][7][8][9][10][11][12][13] or genuinely organic compounds, [14][15][16][17] are very promising units of a future quantum computing architecture. A prominent feature which makes MNMs more attractive than many other established platforms [18][19][20][21][22][23][24][25][26] (based on encoding and manipulating information on two level units called qubits) is represented by their intrinsic multi-level structure.…”

Nanomaterials for Quantum Information Science and Engineering

“…MNMs are metalorganic molecules with one [303,304] or multiple [305] TM/RE ions, surrounded by organic ligands. Fig.…”

“…A promising application of MNMs is quantum memories with embedded QEC [305,311,312] . Multiple ancilla qubits can be encoded in the multilevel system and can be used to encode one logical qubit [312] .…”

High cooperativity coupling to nuclear spins on a circuit QED architecture

“…This introduces a collective enhancement of the coupling between molecular spin excitations and microwave photons, while preserving the ability to address individual spin transitions. Last, but not least, this class of molecules has been recently proposed as a suitable platform to encode error protected qubits 23,36,38,[44][45][46] .…”