[1] Univ York, Dept Comp Sci, York YO10 5GH, N Yorkshire, England
[2] Univ York, York Ctr Quantum Technol, York YO10 5GH, N Yorkshire, England
[3] MIT, Res Lab Elect, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[4] Tech Univ Denmark, Ctr Macroscop Quantum States BigQ, Dept Phys, DK-2800 Lyngby, Denmark
[5] Univ Florence, Dept Phys & Astron, Via G Sansone 1, I-50019 Sesto Fiorentino, FI, Italy
[6] Imperial Coll, Dept Comp, London SW7 2AZ, England
[7] Univ York, Dept Math, York YO10 5DD, N Yorkshire, England
[8] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
[9] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England
[10] Int Islamic Univ Malaysia IIUM, Fac Sci, Jalan Sultan Ahmad Shah, Kuantan 25200, Pahang, Malaysia
[11] Univ Putra Malaysia, Inst Math Res INSPEM, Upm Serdang 43400, Selangor, Malaysia
[12] Univ Technol Sydney, Ctr Quantum Software & Informat, Sch Software, Sydney, NSW 2007, Australia
[13] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore, Singapore
[14] Natl Univ Singapore, Ctr Quantum Technol, Singapore, Singapore
[15] Palacky Univ, Dept Opt, 17 Listopadu 50, Olomouc 77207, Czech Republic
[16] Univ Padua, Dipartimento Ingn Informaz, Via Gradenigo 6B, I-35131 Padua, Italy
[17] Univ Edinburgh, Sch Informat, 10 Crichton St, Edinburgh EH8 9AB, Midlothian, Scotland