"Code Name","Article Title","First Author","Link","Year","Platform","Physical system","Notes","T1","T2"
"Cooper-pair box","Coherent control of macroscopic quantum states in a single-Cooper-pair box","Nakamura","https://arxiv.org/abs/cond-mat/9904003v1","1999","Superconducting circuit","Josephson junction","","0.000000002",""
"Cooper-pair box","Charge echo in a Cooper-pair box","Nakamura","https://arxiv.org/abs/cond-mat/0111402","2001","Superconducting circuit","Josephson junction","","0.000000009","0.000000005"
"Quantronium","Manipulating the Quantum State of an Electrical Circuit","Vion","https://arxiv.org/abs/cond-mat/0205343","2002","Superconducting circuit","Josephson junction","","0.000001","0.0000008"
"Flux qubit","Coherent Quantum Dynamics of a Superconducting Flux Qubit","Chiorescu","https://arxiv.org/abs/cond-mat/0305461","2003","Superconducting circuit","Josephson junction","","0.000001","0.00000002"
"Flux qubit","Dephasing of a superconducting qubit induced by photon noise","Bertet","https://arxiv.org/abs/cond-mat/0512428","2005","Superconducting circuit","Josephson junction","","0.000005","0.000005"
"Transmon","Controlling the spontaneous emission of a superconducting transmon qubit","Houck","https://arxiv.org/abs/0803.4490","2007","Superconducting circuit","Josephson junction","","0.000004","0.000002"
"Fock (2D)","Measurement of the decay of Fock states in a superconducting quantum circuit","Wang","https://arxiv.org/abs/0808.3279","2008","Superconducting circuit","Bosonic","","0.000003","0.000006"
"Fluxonium","Fluxonium: single Cooper pair circuit free of charge offsets","Manucharyan","https://arxiv.org/abs/0906.0831","2009","Superconducting circuit","Josephson junction","","","0.00000035"
"Flux qubit","Dynamical decoupling and noise spectroscopy with a superconducting flux qubit","Bylander","https://arxiv.org/abs/1101.4707","2010","Superconducting circuit","Josephson junction","","0.000012","0.000023"
"Transmon (3D)","Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture","Paik","https://arxiv.org/abs/1105.4652","2011","Superconducting circuit","Josephson junction","","0.00007","0.000015"
"Transmon (3D)","Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms","Rigetti","https://arxiv.org/abs/1202.5533","2012","Superconducting circuit","Josephson junction","","0.00007","0.000095"
"Transmon","Improved superconducting qubit coherence using titanium nitride","Kim","https://arxiv.org/abs/1303.4071","2013","Superconducting circuit","Josephson junction","","0.00007","0.00007"
"Fluxonium (3D)","Coherent suppression of electromagnetic dissipation due to superconducting quasiparticles","Pop","https://www.nature.com/articles/nature13017","2014","Superconducting circuit","Josephson junction","","0.001","0.00002"
"Transmon (3D)","Thermal and Residual Excited-State Population in a 3D Transmon Qubit","Jin","https://arxiv.org/abs/1412.2772","2014","Superconducting circuit","Josephson junction","","0.0001","0.0002"
"C-sh. flux qubit","The Flux Qubit Revisited to Enhance Coherence and Reproducibility","Yan","https://arxiv.org/abs/1508.06299","2015","Superconducting circuit","Josephson junction","","0.00004","0.000085"
"Fock (3D)","A Schrodinger Cat Living in Two Boxes","Wang","https://arxiv.org/abs/1601.05505","2015","Superconducting circuit","Bosonic","","0.004","0.001"
"Cat encoding","Demonstrating Quantum Error Correction that Extends the Lifetime of Quantum Information","Ofek","https://arxiv.org/abs/1602.04768v1","2016","Superconducting circuit","Bosonic","The enhanced lifetime of the encoded information is 320µs without any post-selection.","0.00015",""
"Fock (3D)","Fault-tolerant detection of a quantum error","Rosenblum","https://arxiv.org/abs/1803.00102","2018","Superconducting circuit","Bosonic","","0.0011","0.0014"
"Fluxonium (3D)","The high-coherence fluxonium qubit","Nguyen","https://arxiv.org/abs/1810.11006","2018","Superconducting circuit","Josephson junction","","0.0002","0.0003"
"Binomial encoding","Demonstration of quantum error correction and universal gate set on a binomial bosonic logical qubit","Hu","https://arxiv.org/abs/1805.09072","2019","Superconducting circuit","Bosonic","The corrected logical qubit has a lifetime 2.8 times longer than that of its uncorrected counterpart.","0.0001","0.0001"
"Gatemon","A Semiconductor Nanowire-Based Superconducting Qubit","Larsen","https://arxiv.org/abs/1503.08339","2015","Semiconductor","semiconductor Josephson junction","","0.0000008","0.000001"
"Gatemon","Gatemon Benchmarking and Two-Qubit Operation","Casparis","https://arxiv.org/abs/1512.09195","2016","Semiconductor","semiconductor Josephson junction","","0.000003",""
"Gatemon","Evolution of Nanowire Transmons and Their Quantum Coherence in Magnetic Field","Luthi","https://arxiv.org/abs/1711.07961","2018","Semiconductor","semiconductor Josephson junction","","0.00001",""
"Gatemon","Quantum coherent control of a hybrid superconducting circuit made with graphene-based van der Waals heterostructures","Wang","https://arxiv.org/abs/1809.05215","2018","Graphene","graphene Josephson junction","","0.00000005",""
"S1/2 mF=0 hyperfine levels","Single ion qubit with estimated coherence time exceeding one hour","Wang","https://doi.org/10.1038/s41467-020-20330-w","2021","Ion traps","Ytterbium","","","5500"
"S1/2 mF=0 hyperfine levels","Single-qubit quantum memory exceeding ten-minute coherence time","Wang","https://doi.org/10.1038/s41566-017-0007-1","2017","Ion traps","Ytterbium","","","667"
"2s2S1/2 F=1, mF=1 and F=2, mF=2","Long-Lived Qubit Memory Using Atomic Ions","Langer","https://doi.org/10.1103/PhysRevLett.95.060502","2005","Ion traps","Beryllium","","","14.7"
"Hyperfine atomic-clock states","High-Fidelity Preparation, Gates, Memory, and Readout of a Trapped-Ion Quantum Bit","Harty","https://doi.org/10.1103/PhysRevLett.113.220501","2014","Ion traps","Calcium","","","50"
"Cat encoding","Exponential suppression of bit-flips in a qubit encoded in an oscillator","Lescanne","https://doi.org/10.1038/s41567-020-0824-x","2019","Superconducting circuit","Bosonic","","0.001",""
"Cat encoding","One Hundred Second Bit-Flip Time in a Two-Photon Dissipative Oscillator","Berdou","https://doi.org/10.1103/PRXQuantum.4.020350","2023","Superconducting circuit","Bosonic","","127",""
"Cat encoding","Quantum control of a cat-qubit with bit-flip times exceeding ten seconds","Réglade","https://doi.org/10.1038/s41586-024-07294-3","2024","Superconducting circuit","Bosonic","","15","0.0000005"
"Cat encoding","Autoparametric resonance extending the bit-flip time of a cat qubit up to 0.3 s","Marquet","https://doi.org/10.1103/PhysRevX.14.021019","2024","Superconducting circuit","Bosonic","","0.3",""
"Hyperfine","A tweezer array with 6100 highly coherent atomic qubits","Manetsch","https://doi.org/10.48550/arXiv.2403.12021","2024","Neutral atoms","","","119","12.6"
"Hyperfine","Fast Quantum State Control of a Single Trapped Neutral Atom","Jones","https://doi.org/10.1103/PhysRevA.75.040301","2007","Neutral atoms","Rubidium","Spin-echo, dephasing time of 370µs. T1=trap lifetime in the absence of any near-resonant light","3","0.034"
"e spin","One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment","Abobeih","https://doi.org/10.1038/s41467-018-04916-z","2018","NV centers","Diamond","","3600","1.58"
"Hyperfine","A quantum processor based on coherent transport of entangled atom arrays","Bluvstein","https://doi.org/10.1038/s41586-022-04592-6","2022","Neutral atoms","Rubidium","","4","1.5"
"Hyperfine","Multi-qubit entanglement and algorithms on a neutral-atom quantum computer","Graham","https://doi.org/10.1038/s41586-022-04603-6","2022","Neutral atoms","Cesium","T2 using a XY8 pulse","4","1"
"Hyperfine","2000-times repeated imaging of strontium atoms in clock-magic tweezer arrays","Covey","https://doi.org/10.1103/PhysRevLett.122.173201","2019","Neutral atoms","Strontium","","420",""
"Transmon","Manufacturing low dissipation superconducting quantum processors","Nersisyan","https://doi.org/10.48550/arXiv.1901.08042","2019","Superconducting circuit","Josephson junction","an average T_1=76+/-13 μs across 24 qubits with the best qubits having T1>=110 μs","0.000076",""
"Fluxonium","High-coherence fluxonium qubits manufactured with a wafer-scale-uniformity process","Wang","https://doi.org/10.1103/PhysRevApplied.23.044064","2025","Superconducting circuit","Josephson junction","T1 & T2 for their best device, with a qubit frequency f01 = 197 MHz","0.001168","0.000943"
"Transmon","Methods to achieve near-millisecond energy relaxation and dephasing times for a superconducting transmon qubit","Tuokkola","https://doi.org/10.48550/arXiv.2407.18778","2024","Superconducting circuit","Josephson junction","Qubit frequency 2.9 GHz; T1 median 425 us, max 666 +/- 33 us; T2echo median 541 us, max 1057 +/- 138 us","0.000425","0.000541"